HomeMy WebLinkAbout1988-05-17; City Council; 9433; Certify Conditional Negative Declaration Advertise for Bids Palomar Airport Road West Project 3151s Q.
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the award of the construction contract and sale of bonds will occur on Julj 19, 1988. Construction will begin in August and take approximately elever months.
FISCAL IMPACT:
The construction cost is estimated to be $5,712,762 and the total project cost (including design, right-of-way and financing costs) is estimated to be
The City will contribute the cost of the center four lanes to the district and has budgeted $3,100,000 for this,
$7 , 659,268.
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PAGE TWO OF AB# 1/33
EXHIBITS :
1. Location Map
2. Resolution No. rr- fSL certifying the Conditional Negative Declaration for Palomar Airport Road West (Exhi bits "ND" and "PIT" attached).
Resolution No. ti"g - /s7 approving plans, specifications and contract documents and authorizing the City Clerk to advertise for construction bids for Palomar Airport Road West.
4. Biological Resources Report dated December 1987 (on file in the City C1 erk' s Office) .
5. Archaeological Survey dated December 1987 (on file in the City Clerk's Office).
6. Plans, Specification and Contract Documents (on file in the Engineering Department).
3.
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VICINITY MAP
N. T. E.
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PROJECT NRME PALOMAR AIRPORT ROAD WEST PROJ. NO* EXHIBIT
ASSESSMENT DISTRICT & IMPROVEMENT PROJECT 3151 1
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-RESOLUTION N0.88-156
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD, CALIFORNIA APPROVING A CONDITIONAL NEGATIVE DECLARATION FOR THE CONSTRUCTION OF STREET WIDENING AND RELATED IMPROVEMENTS TO PALOMAR AIRPORT ROAD (WEST). APPLICANT: CITY OF CARLSBAD
WHEREAS, the City Council did on the 17th day of May, 1988 hol
regul ar meeting , and
WHEREAS, at said meeting, upon hearing and considering all testim
and arguments, examining the initial study, analyzing the informat
submitted by staff, and considering any written comments received, the C
Council considered all factors relating to the Conditional Negat
Decl arat i on.
NOW, THEREFORE, BE IT HEREBY RESOLVED by the City Council as follo
A) That the foregoing recitations are true and correct.
B) That based on the evidence presented, the City Council hereby APPROVES Conditional Negative Declaration according to Exhibit "NO", dated Decem
30, 1987, and Exhibit "PIT", dated December 23, 1987 attached hereto
made a part hereof, based on the following findings:
Findinqs:
1. The initial study required mitigation measures be incorporated i the project sufficient to reduce potential environmental impacts t level of insignificance.
2. The proposed project is necessary to increase traffic safety and reduce local flooding and drainage hazards. ///
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3. The Planning Commission has determined that the project is consist
with the City’s General Plan and Local Coastal Program.
PASSED, APPROVED AND ADOPTED at a regular meeting of the Carl5
City Council held on the 17 day of May, 1988 by the following vote, to wit:
AYES: Council Members Lewis, Kulchin, Pettine, Mamaux and Larsor
NOES: None
None ABSENT:
ATTEST:
d. R& ALETHA L. RAUTENKRANZ, City Cle
(SEAL)
' 2075 LAS PACMAS DRIVE
CAR LS BAD, CALIFORNIA 92009-
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PLANNING DEPARTMENT (619) 438-1161
aitp of Cartsbab
NEGATIVE DECLARATION
PROJECT ADDRESS/LOCATION: Palomar Airport Road between Paseo Del Norte and 7,900 feet & thereof.
PROJECT DESCRIPTION: Street widening improvements of existing
road to prime arterial standards.
The city of Carlsbad has conducted an environmental review of the above described project pursuant to the Guidelines for Implementation of the California Environmental Quality Act and the Environmental Protection Ordinance of the City of Carlsbad. As a result of said review, a Negative Declaration (declaration that the project will not have a significant impact on the
environment) is hereby issued for the subject project. Justification for this action is on file in the Planning Department.
A copy of the Negative Declaration with supportive documents is on file in the Planning Department, 2075 Las Palmas Drive,
Carlsbad, California 92009. Comments from the public are invited. Please submit comments in writing to the Planning Department within ten (10) days of date of issuance.
DATED: December 30, 1987 ' \tL&i!i!@&Q t 4,LL - Q cl)a,
MICHAEL J. HOL~MILLE~
CASE NO: PCD/GPC 87-3 Planning Director
APPLICANT: CITY OF CARLSBAD
PUBLISH DATE: December 30, 1987
EXHIBIT "ND"
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PCD/GPC 87-3 PALOMAR AIRPORT ROAD - WEST ASSESSMENT
Explanation of Environmental Determinations
The numbered items below refer to the Initial, Study Checklist.
1. Earth - The project will widen a portion of existing Palomar Airport Road (PAR) to its designated "prime arterial" standards. The current alignment which will not be significantly altered follows a broad creek valley. There are no unstable earth conditions or unique geologic structures in the
area. The project has been conditioned to eliminate short-term construction related erosion impacts. The project related mitigation program (see No. 4 Plant Life) will stabilize local drainage and contribute to long term benefits for erosion control.
2. Air - The improvement to prime arterial standards will allow the projected regional traffic on PAR to move more efficiently and thus aid in reducing projected and planned for deterioration in regional air quality.
3. Water - The project includes drainage improvements that will have a beneficial effect on local stream
flow.
4. Plant Life -
The project will have direct and indirect impacts
on approximately one acre of disturbed wetland and
related habitats. A mitigation program that creates approximately 1-7 acres of improved
wetland and related habitat has been included as
part of this project which reduces potential
impacts to a level of insignificance.
5. Animal Life -
The mitigation program noted above should improve
the habitat and benefit animal life in the area.
6. Noise - - There will be short-term construction related noise impacts; however, the improvements will take
place in a non-residential and a generally
undeveloped area. There will be long-term unavoidable noise impacts related to increased
regional traffic volumes. The adjacent developable areas are designated for non-
residential uses. Also, adjacent development
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standards require minimum 50 foot setbacks from
the right of way so that the unavoidable noise
impacts will be minimized.
7. Light and Glare -
Street lighting is not part ,of this project but will be added as a subsequent phase. The street lighting is for safety reasons and will not
produce adverse glare.
8. Land Use -
Improvement of PAR to "prime arterial" standards will permit the road to operate at an acceptable
level of service and will not significantly alter
land use patterns.
9. Natural Resources - Not applicable.
10. Risk of Upset -
The project does not increase the risk of release
of hazardous materials resulting from accidents.
Instead the project should add to traffic safety
and therefore decrease such a risk.
11. Population - Not applicable.
12. Housing - Not applicable.
13. Transportation/Circulation -
The project should have a positive effect on
regional traffic circulation. It will not generate new traffic but instead provide a means to accommodate existing and future traffic at
acceptable levels of service. No parking facilities are involved and parking is not now or in the future allowed on the road. As noted previously, the project will reduce traffic related hazards and increase safety for traffic (including bicycle) and pedestrians.
14. Public Services -
- The only material effect the project will have on
public facilities or services is a proportional
and anticipated increase in road maintenance. This is not considered a significant adverse impact on city facilities.
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15. Energy - Nonsubstantial amounts of energy (fuel) will be
used during construction. Regional growth and
related traffic will require increased supplies of energy. However, construction of PAR improvements will not by itself have any significant effect on
energy demands.
16. Utilities -
Only storm water drainage will be effected by this
project and that is considered to be beneficial.
17. Human Health -
Public safety will be increased as a result of
this project .
18. Aesthetics -
The road widening project is to an existing
facility. No views will be obstructed. All manufactured slopes will be landscaped.
19. Recreation -
Recreational opportunities will be enhanced by
construction of bicycle lanes.
20. Archaeological/Historical -
An archaeological survey of the project has resulted in the relocation of three previously recorded sites and the recording of a new site. Impacts to the previously recorded sites are not
limited testing program to determine the
significance of the new site has been incorporated
into this project. The project will as a condition mitigate any significant impacts determined by this testing program so that a level
of nonsignificance will be achieved.
by CEQA standards considered significant. A
21. Mandatory Findings of Significance -
A. The biological resource mitigation program that is
part of this project because of higher than 1:l - replacement ratios should increase diversity.
B. The project helps implement one of the City's
General Plan long-term goals of providing a safe and efficient circulation system.
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C. The project aids in reducing cumulative growth
related impacts associated with traffic, flood control, and loss of biological resources.
D. The project should have both direct and indirect
positive effects on humans by achieving part, of
the City’s long-term circulation goals.
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ENVIRONMENTAL IMPACT ASSESSMENT FORM - PART 11
(TO BE COMPLETED BY THE PLANNING DEPALiTMENT)
CASE NO. PCDIGPC 87-3
DATE : Dec. 23, 1987
I BACKGROUND
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2. ADDRESS AND PHONE NUMBER OF APPLICANT:
Carlsbad, California 92009 (61 9) 438-1 161
APPLICANT: City of Carlsbad, Municipal Project Department
2075 Las Palmas Drive,
3. DATE CHECK LIST SUBMITTED: July 8, 1987
11. ENVIRONMENTAL IMPACTS (Explanations of all Affirmative Answers are to be written under Section I11 - Discussion of Environmental Evaluation)
NO - - YES MAYBE
1. Earth - Will the proposal have r significant results in:
a. Unstable earth conditions or in changes in geologic substructures?
b. Disruptions, displacements, com- paction or overcovering of the soil?
c. Change in topography or ground surface relief features?
d. The destruction, covering or
x
x
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modification of any unique geologic or physical features?
erosion of soils, either on or off
the site? X
X -
e. Any increase in wind or water
f. Changes in deposition or erosion
of beach sands, or changes in siltation, deposition or erosion which may modify the channel or a
river or stream or the bed of the
ocean or any bay, inlet or lake? X
EXHIBIT “P
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NO - MAYBE - YES -
2. Air - Will the proposal have significant results in: 7
a. Air emissions or deterioration
b. The creation of objectionable
c. Alteration of air movement,
X of ambient air quality?
odors?
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moisture or temperature, or any
change in climate, either locally or 2: eg ion all y ? X -
3. Water - Will the proposal have ._ significant results in:
a. Changes in currents, or the course or direction of water movements, in either marine or fresh waters?
drainage patterns, or the rate and amount of surface water runoff?
of flood waters?
water in any water body?
or in any alteration of surface water quality, including but not limited to, temperature, dissolved
oxygen or turbidity?
f. Alteration of the direction or rate of flow of ground waters?
X -
b. Changes in absorption rates,
X -
c. Alterations to the course or flow
d. Change in the amount of surface
e. Discharge into surface waters,
X -
X -
X -
X -
g. Change in the quantity of ground waters, either through direct additions or withdrawals, or through interception of an aquifer by cuts or excavations? X -
h. Reduction in the amount of water
otherwise available for public water supplies? X -
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NO - MAYBE - YES -
4. Plant Life - Will the proposal have
significant results in:
a. Change in the diversity of species, or numbers of any species of plants
(including trees, shrubs, grass, crops, microflora and aquatic plants)?
Reduction of the numbers of any unique, rare or endangered species
Introduction of new species of plants into an area, or in a barrier to the normal replenishment of existing
- X
b.
of plants? X - -
c.
species ? X - -
d. Reduction in acreage of any
X - agricultural cro.p?
5. Animal Life - Will the proposal have
significant results in:
a. Changes in the diversity of species,
or numbers of any species of animals (birds, land animals including reptiles,
fish and shellfish, benthic organisms, insects or microfauna)?
b. Reduction of the numbers of any unique, rare or endangered species of animals?
c. Introduction of new species of animals into an area, or result in a barrier to the migration or movement of
anima 1 s ?
Deterioration to existing fish or wildlife habitat?
6. Noise - Will the proposal significantly
7. -- Light and Glare - Will the proposal sig-
8. Land use - Will the proposal have
X -
X -
X -
d.
X -
- increase existing noise levels? X
X - nificantly produce new light or glare?
significant results in the alteration of
the present or planned land use of an area?
c
X -
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NO - MAYBE - YES -
9. Natural Resources - Will the proposal
a. Increase in the rate of use of any
b. Depletion of any nonrenewable
have significant results in:
natural resources? '? -
> natural resource? -
10. Risk of Upset - Does the proposal involve a significant risk of an explosion or the release of hazardous
substances (including, but not limited to, oil, pesticides, chemicals or radiation) in the event of an accident
or upset conditions?
Po ulation - Will the proposal signif- hter the location, distribu-
tion, density, or growth rate of the human population of an area?
12. Housin - Will the proposal signif- 4 affect existing housing, or create a demand for additional housing?
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11.
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13. Transportation/Circulation - Will the proposal have significant results in:
a. Generation of additional vehicular
b. Effects on existing parking facilit-
c. Impact upon existing transporation
d. Alterations to present patterns of
- movement?
ies, or demand for new parking? X -
- systems? X
circulation or movement of people - and/or goods? X
e. Alterations to waterborne, rail or
f. Increase in traffic hazards to
x air traffic?
motor vehicles, bicyclists or pedestrians? X -
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NO - MAYBE - YES -
14. Public Services - Will the proposal have a significant effect upon, or have signif- icant results in the need for new or altered governmental services in any of the following areas:
X
x
X
a. Fire protection?
b. Police protection?
c. Schools?
d. Parks or other recreational
e. Maintenance of public facilities,
f. Other governmental services?
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X - facilities?
X
X
- including roads?
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15. Energy - Will the proposal have signif- icant results in:
a. Use of substantial amounts of fuel
b. Demand upon existing sources of
or energy? X
energy, or require the development of new sources of energy?
16. Utilities - Will the proposal have
X -
significant results in the need for new systems, or alterations to the following utilities:
a. Power or natural gas? X
x b. Communications systems?
c. Water? X
d. Sewer or septic tanks? x
e. Storm water drainage? X
f. Solid waste and disposal? X
17. Human Health - Will the proposal have significant results in the creation of
any health hazard or potential health hazard (excluding mental health)? X
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NO - MAYBE ___. YES -
18. Aesthetics - Will the proposal have significant results in the obstruction
of any scenic vista or view open to the
public, or will the proposal result in
creation of an aesthetically offensive public view?
19. Recreation - Will the proposal have
significant results in the impact upon
the quality or quantity of existing
recreational opportunities?
20. Archeological/Historical - Will the
proposal have significant results in
the alteration of a significant
archeological or historical site,
x
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- structure, object or building? X
21. Analyze viable alternatives to the proposed project such as:
a) Phased development of the project, b) alternate site designs, c) alternate scale of development, d) alternate uses for the site, e) development at some future time rather than now, f) alternate
sites for the proposed, and g) no project alternative.
a) The project is phased.
b) N/A
c) Inconsistent with the General Plan
dl N/A
e) Inconsistent with the General Plan
f) N/A
g) Inconsistent with the General Plan
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Nc - MAYBE - YES -
22. Mandatory Pindings of Significance -
a. Does the project have the potential to degrade the quality of the environment, or curtail the diversity
in the environment? X -
b. Does the project have the potential to achieve short-term, to the dis- advantage of long-term, environmental goals? (A short-term impact on the environment is one which occurs in a relatively brief, definitive period of time while long-term impacts will endure well into the future.)
c. Does the project have impacts which are individually limited, but cumulatively considerable? (A project may impact on two or more separate resources where the impact on each resource is relatively small, but where the effect of the total of those impacts on the environment is significant. )
d. Does the project have environmental
effects which will cause substantial adverse effects on human beings, either directly or indirectly?
X -
X -
X -
111. DISCUSSION OF ENVIRONMENTAL EVALUATION
SEE ATTACHED EXPLANATION OF ENVl RONMENTAL DETERMINATIONS
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IV. DETERMINATI ON (To Be Completed by the Planning
Department)
On the bases of this initial evaluation:
I find the proposed project COULD NOT have a
significant effect on the environment, and a
NEGATIVE DECLARATION will be prepared.
X I find that, although the proposed project could
have a significant effect on the environment, there will not be a significant effect in this case
because the mitigation measures described on an
attached sheet have been added to the project. A Conditional Negative Declaration will be proposed.
I find the proposed project MAY have a significant effect on the environment, and an ENVIRONMENTAL
IMPACT REPORT is re
12/23/87
Date
V. MITIGATING MEASURES (If Applicable)
A. The recommended mitigation measures contained on pages 23 through 25 of the attached Biological Resources Report prepared by WESTEC Services, Inc., as well as the conceptual mitigation program (Attachment B of the same report) are incorporated
herein by reference as mitigation to reduce biological impacts to a level of non-significance.
B. Paleological Resources Mitigation Measures
1. Prior to issuance of a mass-grading permit, the developer of the roadway should present a letter to the City of Carlsbad indicating a qualified paleontologist has been retained to
qualified paleontologist is defined as an individual with a MS or PH.D. in paleontology or geology who is familiar with paleontological procedures and techniques).
2. Prior to grading, a limited pregrade salvage of the fossil site discovered at Station 42+50 should be carried out to collect all exposed fossil remains.
carry out the resource mitigation. (A
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3. A qualified paleontologist should be at the
pre-grade meeting to consult with the grading
and excavation contractors.
4. A paleontological monitor should be onsite at all times during the original cutting of' previously undisturbed sediments of th4e Santiago Formation to inspect cuts for contained fossils. Periodic inspections of cuts involving the Sweitzer Formation is also recommended. (A paleontological monitor is defined as an individual who has experience in the collection and salvage of fossil materials. The paleontological monitor should work under the direction of a qualified
5. In the event that well-preserved fossils are discovered, the paleontologist (or paleontological monitor) should be allowed to temporarily direct, divert, or halt grading to allow recovery of fossil remains in a timely manner. Because of the high potential for the recovering of small fossil remains, such as isolated mammal teeth, it will be necessary to
set up a screen-washing operation on the site.
6. Fossil remains collected during this salvage
program should be cleaned, sorted, and
cataloged and then, with the owner's
permission, deposited in a scientific institution with paleontological collections, such as the San Diego Natural History Museum.
The scientifically important roadcut exposures along the north side of Palomar Airport Road (Stations 34 to 39) should be protected from
total destruction by leaving them partially unplanted and free standing. This does not mean that grading cannot take place in this area, only that if new cuts are made, they
should not be completed covered by plants or
concrete . As a part of the streetscape program for this section of Palomar Airport
Road, a paleontologist shall be retained to
assist in the design and landscaping of the
+ streetscape. This street in the design and
landscaping of the streetscape. This streetscape program will help ensure that
future generations of geologist and paleontologists will be able to view and study the type locality of the Palomar Terrace.
paleontologist) . e
7.
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c. Archaeological Mitigation
Newly recorded site PAR-1 shall undergo a limited testing program per the recommendations contained in the Archaeological Survey prepared by WESTEC Services, Inc. (attached). Based on the results of the testing, a determination of significant impacts
and mitigation of impacts will be made and if necessary included as part of the project.
D. Local Coastal Program (Mello I1 Segment) Mitigation Measures
LCP Policy
3-4 Grading shall comply with the City of Carlsbad
grading ordinance, and
Grading activity shall be prohibited during the
rainy season, from October 1st to April 1st of each year; and
All graded areas shall be landscaped prior to October 1st of each year with either temporary or permanent landscaping materials to reduce erosion potential. Such landscaping shall be maintained and replanted if not well-established by December 1st following the initial planting.
A runoff control plan shall be prepared by a licensed engineer qualified in hydrology and hydraulics; such approved plans shall assure that there would be no increase in peak discharge velocities from the right-of-way or velocities shall not exceed six feet per second. If predicted
runoff velocities exceed six feet per second then
runoff control may be accomplished by a variety of
measures, including, but not limited to, onsite
catchment basins, detention basins, siltation
traps, and energy dissipators, and shall not be concentrated in one area.
All permanent runoff-control and erosion-control
devices shall be developed and installed prior to or concurrent with any onsite grading activities.
4-4 When earth changes are required and natural vegetation is removed, the area and duration of
exposure shall be kept at a minimum.
4-5 Soil erosion control practices shall be used
against @@onsite" soil erosion. These include keeping soil covered with temporary or permanent vegetation or with mulch materials, special grading
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procedures, diversion structures to divert surface
runoff from exposed soils, and grade stabilization
structures to control surface water.
"Sediment control" practices shall be employed as a
perimeter protection to prevent offsite drainage. Methods such as diversion ditches,, sediment traps,
vegetative filters, and sediment basins shall be explored.
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VI. APPLICANT CONCURRENCE WITH MITIGATING MEASURES
THIS IS TO CERTIFY THAT I HAVE REVIEWED THE ABOVE MITIGATING MEASURES AND CONCUR WITH THE ADDITION OF THESE MEASURES TO
THE PROJECT.
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REsOLrnIoN No. 88-157
RESOLUTION OF THE CITY COUNCIL OF THE
ING PREVAILING WAGE SCALE AND DIRECTING CALL FOR CONSTRUCTION BIDS
CITY OF CARLSBAD, CALIFORNIA, REFERENC-
WHEREAS, the CITY COUNCIL of the CITY OF CARLSBAD,
CALIFORNIA, has heretofore instituted proceedings under the
provisions of the "Municipal Improvement Act of 1913", being
Division 12 of the Streets and Highways Code of the State of
California, for the construction of certain public works of
improvement in a special assessment district known and desig-
nated as ASSESSMENT DISTRICT NO. 86-1 (PALOMAR AIRPORT ROAD)
(hereinafter referred to as the "Assessment District"); and,
WHEREAS, at this time there have been submitted for final
review the plans and specifications for the works of improvement
for the Assessment District; and,
WHEREAS, it is the intention of the legislative body to
also call for sealed proposals or bids for the doing of said
work and improvements in said Assessment District; and,
WHEREAS, it is necessary to determine the prevailing rate
of wages for the various classifications of workmen required in
the performance of said work.
NOW, THEREFORE, IT IS HEREBY RESOLVED AS FOLLOWS:
SECTION 1. That the above recitals are all true ar
correct.
SECTION 2. That the plans and specifications for the work
of improvement in the Assessment District are hereby approved ar
authorized for bidding.
SECTION 3. That it is hereby determined and ascertain€
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that the general prevailing rate of per diem wages in th
locality in which said work described is to be performed in th
matter of the construction of certain public works of improve
ment, together with appurtenances, in the Assessment District
under the provisions of the "Municipal Improvement Act of 1913"
being Division 12 of the Streets and Highways Code of the Stat
of California, for each craft or type of workman or mechani
needed to execute the contract, and also the general prevailin
rate for legal holiday and overtime work of each craft or type c
workman or mechanic, is in accordance with the schedule obtain6
from the Director of Industrial Relations, pursuant to the provj
sions of Section 1773 of the Labor Code of the State of Califoi
nia, and reference is hereby made to copies thereof on file wit
the transcript of these proceedings, which said copies are avail
able to any interested party upon request. Further a copy shal
be posted at each job site during the course of construction.
SECTION 4. That the proposals or bids shall be opened ar
examined at a public meeting so called; and said results of tl
bidding shall be reported at the next regular meeting of thj
legislative body after the opening of the bids.
SECTION 5. That the terms and conditions for bidding on t
works of improvement for this Assessment District are as SI
forth in full in the Bid Documents in the specifications I
previously approved. Reference is hereby made to said Bid Doc?
ments heretofore approved and identified as "NOTICE INVITI
SEALED PROPOSALS, ASSESSMENT DISTRICT NO. 86-1 (PALOMAR AIRPO
ROAD)". For all particulars as to bidding, the Notice Inviti
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Sealed Proposals above referenced and all incorporated document
and laws, including but not limited to the "Municipal Improvemen
Act of 1913", shall control.
SECTION 6. That it is hereby determined that in the even
the contractor, contracting owners included, does not complet
the work within the time limit specified in the contract o
within the time limit as shall be authorized, the contractor o
contracting owners, as the case may be, shall pay as liquidate
damages the amount or amounts as set forth in the specification
for the project, said amounts herein referenced and so incor
porated. That it is impractical to determine the actual damag
which will be sustained by reason of such delay, but that th
stated sum is a reasonable amount for said liquidated damages an
is not being imposed as a penalty.
PASSED, APPROVED AND ADOPTED by the City Council of the Cit
of Carlsbad at its regular meeting held on the 17th day o
May , 1988, by the following vote, to wit:
AYES: Council Members Lewis, Kulchin, Pettine, Mamaux and Larson
NOES: None
ABSENT: None
ATTEST:
(llQxL. -A. QaA ALETHA L. RAUTENKRANZ, City aerk
(SEAL)
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AGEHDfi 81i.L NO. ?-y?j
0f+7w Lj- 17 gf //
BIOLOGICAL RESOURCES REPORT OF THE PALOMAR AIRPORT ROAD WIDENING AND ASSOCIATED ROADWAY IMPROVEMENTS PROJECT
Prepared for:
City of Carlsbad 2075 Las Palmas Carlsbad, CA 92008
Prepared by:
WESTEC Services, Inc. 55 10 Morehouse Drive San Diego, CA 92121
December 1987
EXHIBIT 4
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TABLE OF CONTENTS
InLE PACE
INTRODUCI'ION 1
GEOGRAPHICALLIMITS OFTHESTUDY 1
LAND USE 1
TOPOGRAPHY AND SOILS 4
SURVEY METHODS 4
VEGETATION 5
WILDLIFE 14
Wiwife Habitat Evaluation 14
Amphibians 14
Reptiles 15
Birds 15
Mammais 15
HIGH INTEREST SPECIES/HABlTATS 16
Plants 16
Animals 17
Reptiles 17
Birds 18
Mammals 19
Habitats 19
DISCUSSION AND IMPACT ANALYSIS 20
RECOMMENDATIONS 22
Construction Practices 23
Upland Habitat Replacement 23
Additional Recow Olls 25
REFERENCES 26
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LIST OF FIGURES
NUMBER TrrLE PAGE
1 Regional Location of Project 2
2 3
3 Map Index for Figures 4 through 9 6
4 Vegetative Habitats as Shown Along Road 7
5 Vegetative Habitats as Shown Along Road 8
6 Vegetative Habitats as Shown Along Road 9
7 Vegetative Habitats as Shown Along Road 10
8 Vegetative Habitats Within Proposed Road Detour 11
9 Vegetative Habitats In or Near the Proposed Channel 12
Project Site as Depicted on Encinitas and San Luis Rey 7.5' USGS Quadrangles
Widening Portion of Project Site
Widening Portion of Project Site
Widening Portion of Project Site
Widening Portion of Project Site
LIST OF ATTACHMENTS
LETTER TITLE PACE
A Floral Species List A- 1
B Conceptual Mitigation Plan B- 1
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INTRODUCTION
A biological survey of the proposed alignments for the widening of approximately 1.5
miles of Palom Airport Road, and construction of a 1920 foot long detour road and a
1040 foot long channel adjacent to the widened road was made to determine the flora,
fauna, and habitat types found within this project area. Also surveyed were offsite areas
adjacent to the project site to determine peripheral impacts. The following report describes
the general distribution and component plants of the vegetative associations and discusses
wildlife habitat resources and their utilization. Particular attention during the survey was
given to determining the presence or absence of significant biological features on or
adjacent to the property. Significant biological features are considered to be plant or animal
species of rare and/or endangered status, depleted or declining faunal species, and species
and habitat types of unique or limited distribution. The biological effects of the proposed
road widening, road detour, and channel construction are addressed in this report, and
recommendations to reduce identified effects are presented.
GEOGRAPHICAL LIMITS OF THE STUDY
The project area is located east of Interstate 5, along Palomar Airport Road in the City of
Carlsbad, northwestern San Diego County, California (Figure 1). The proposed road
widening alignment includes 1.5 miles from east of Paseo del Norte to approximately
0.5 mile east of Laurel Tree Road (Figure 2). The proposed detour road is situated south
of Palomar Airport Road, near he western end of the alignment, and the proposed channel
is located south of the existing road at the eastern end of the alignment (Figure 2). Canyon
de las Encinas lies directly south of Palomar Airport Road, and Palomar Airport lies to the
northeast.
LAND USE
Palomar Airport Road is currently a 2-he highway although this transportation conidor is
designated as a prime arterial @e., a road which can be expanded to 6 lanes to include a
curb separation within a 126 foot right of way, and an 18 foot median divider) in the
City's General Plan and in the Local Coastal Plan (G. Wayne, personal communication).
Land in the northwestern part of the alignment is currently under cultivation, and fallow or
old fields lie south of the existing road and in the northeastern portion of the alignment.
1
FIGURE
1 Regional Location of Project
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3
north, while land to the south in the floodplain is relatively flat. Elevation within the
project area ranges from a high of approximately 140 feet above mean sea level (MSL) in
the northeast to 60 feet above MSL in the south. An intermittent stream runs through the
canyon south of the project site and portions of this stream may be indirectly impacted by
channelization associated with this project.
I
I and potential wetland mitigation areas were surveyed on November 16,1987 by Patricia
Vegetative habitats are delineated in Figures 4 through 9 and discussed separately below.
Figure 3 provides an index to Figures 4 through 9. Figures 4-7 depict the road alignment,
Figure 8 depicts the road detour, and Figure 9 depicts the proposed channelization area.
Vegetative associations follow Holland (1986) where applicable, or Thorne (1976). A
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I home (Bromus rubens), telegraph weed (Heterotheca grandiflora), sand-aster
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(Corethrogywfilagi~fofia var. virgata), and black mustard (Brassica nigra).
Disturbed vegetation is comprised of nonnative, exotic or weedy species. This habitat
dominates the majoriiy of the site, and is a result of past or present agricultural or gazing
activities, madway construction, and utilities placement and maintenance. Typical species
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include myoporum (Myoponun laetum), tree tobacco (Nicotiana glauca), sweet fennel
(Foeniculum vulgare), castor bean (Ricinis communis), garland chrysanthemum
grass (Pennisenun setaceum), ice plant (Gasoul crystallinurn), and Russian-thistle (Salsoia
iberica), among others. Disturbed vegetation comprises 22.5 acres (88.0 percent) of the
vegetation onsite. Small agricultural areas occur in the northeastern portion of the
classified as disturbed habitat from a biological perspective.
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I (Chrysanrhemum coronarim), halberd-leaf saltbush (Atripla panda ssp. hastata), fountain
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alignment, and account for an additional 0.96 acre (3.8 percent) which is effectively
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I Wetland habitat occurs in scattered locations throughout the project area, and is generally a
direct result of supplemental water from storm drains or pipes. This habitat is better-
developed offsite to the south, in the intermittent drainage that transects Canyon de las
Encinas.
Most of the riparian habitat onsite lies largely within the road alignment or detour road
alignment or their expected impact areas and is classified as riparian scrub. In most areas,
this association is dominated by mulefat (Baccharis glutinosa) or a combination of mulefat
and coyote brush. Young willows (Salix spp.) occur only occasionally in mulefat-
the alignment. Betterdeveloped wetland habitat, which is dominated by arroyo willow
(Salk ladolepis), cattail (Typha spp.), and bulrush (Scilpus sp.), occurs onsite only near
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I dominated scrub. Riparian scrub comprises 0.48 acre (1.9 percent) of vegetation within
I the truck farm, in the western portion of the alignment. This habitat amounts to 0.10 acre
(0.40 percent of the total vegetation) onsite. I
I Small areas of mesic habitat dominated by herbaceous, facultative wetland species occur
south of Palomar Airport Road, at the toe of the existing slopes. Sedge (Cyperus sp.) is
the primary species in these areas. This association comprises 0.003 acre (0.01 percent)
of the total vegetation onsite.
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l Wetland vegetation in Canyon de las Encinas to the south will be indirectly impacted by the
channelization portion of the roadways project, since this project will divert the flow of I water from the existing creek. Within the project's influence, wetland vegetation in the
creek consists of riparian woodland, freshwater marsh, mesic habitat, and open water or
unvegetated channel, and totals 0.31 acre. The channel is narrow through this area, and
bounded on the south by steep, chaparral covered slopes and on the north by disturbed
upland vegetation. Riparian woodland (0.04 acre) occurs primarily as scattered willow
trees in or adjacent to the channel and farms no well-developed woodland. Freshwater
marsh (0.21 acre) is more extensive and exists as narrow, linear strips of dense cattails in
Mesic habitat (0.01 acre) consists of one small area of sedges within the
channel. Finally, unvegetated channel or open water habitat accounts for 0.05 acre, and
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the channel.
I occurs primarily between stands of cattails.
Although no oaks or oak woodland occur within the gmdmg area for the road, two
individual coast live oak trees (Quercus agrifoliu) are located approximately 15-25 feet
south of the grading limit, within the channel construction impact area. Several additional
is relatively well-developed offsite to the southeast
WILDLIFE
Wildlife Habitat Evaluation
Overall, wildlife diversity on the project site is not expected to be high due to past
disturbances, the traffic on Palomar Airport Road, and adjacent land uses. Most of the site
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I oaks occur between the proposed channel and the existing creek. Southern oak woodland
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I also lacks dense cover, trees, and rock outcroppings which contribute to habitat diversity
and hence wildlife divdty. The site is somewhat enhanced by the presence of riparian l
l and oak woodlands to the south. For the most part, however, wildlife use of the site is
expected to be limited to common scrubassociated species and species adapted to disturbed I
I environments.
Amp hi bians
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I No amphibians were detected onsite, and few are expected to occur here. The lack of a
permanent water source and appmpriate habitat are limiting factors. A few species could I
occur in oak woodland and riparian habitat south of the proposed channel, however,
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I ~ including Pacific treeikog (Hyla regilla) and gpden slender salamander (Batrachoseps
major), among others.
Reptiles I
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I No reptile species were detected onsite, althou a few are expected to occur here, inchd-
ing California side-blotched lizard (Uta stansburiana elegans), western fence lizard
beldingi), silvery legless lizard (Aniella pul 'hra pulchra), San Diego horned lizard
(Phrynosoma coronahun bhimillei], and common kingsnake (Lampropeltis getulus).
Birds
Twelve bird species were detected onsite. Some of these, such as mourning dove (Zenaida
northern mockingbird (Mimtcs polyglottos), are! often associated with disturbed habitats,
meadowlark (Sturnella neglecta) were also obdrved in disturbed or grassy mas. Anna's
hummingbird (Archilochus anna), brown towhee (Pipilo fuscus), common flicker
(CoZaptes auratus), and song sparrow (Zonotri j hia melodia) were observed primarily in
scrub habitat. A red-shouldered hawk (Buteo lineanrs) was observed flying over the site,
and probably forages here, but nests offsite to de south. Finally, a common yellowthroat
(Geothlypis trichas) was observed in riparian h bitat onsite. Most of the observed birds
can be expected to nest onsite or nearby, with thq exception of the hawk, which may nest in
woodlands to the north.
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I (Sceloporus occidentalis), orange-throated khiptail (Cnemidophorus hyperythrus
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I macroura), lesser goldfinch (Cardueh psaltia)) house finch (Carpodacus mexicLuu(s), and
and this appears to be the case onsite. Western hgbird (Tyrranus verticalis) and westem l I
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Mammals 1 I
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I Three mammal species were detected within lthe alignment: brush rabbit (Sylvilagus I
I bachmani cinerascens), California ground squi..&!l (Spermophilus beecheyi nudipes), and
raccoon (Procyon lotor). The abundance of Uomia ground squirrel, in particular, attests
proximity to development probably limits the ocdurrence of several larger mammal species,
I I to the disturbed conditions found onsite. Thellack of cover, disturbed conditions, and
although these animals may utilize woodland haditats to the south as a conidor.
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I HIGH INTEREST SPECIES/HABITATS
I Plants
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I High-interest plants include those listed by the U.S. Fish and Wildlife Service (USFWS
I 1985a), California Department of Fish and Game (CDFG 1985), and California Native
Plant Society (Smith and York 1984). The CNPS listing is sanctioned by the California
Department of Fish and Game and essentially serves as their list of "candidate" species.
No sensitive plant species were detected onsite. Potentially-occurring species are briefly
discussed below.
Several sensitive plants are known from the project area. The great majority of these are
associated with habitats or vegetative associations which do not occur onsite, and are not to
be expected on the disturbed soils which comprise the majority of the study area. In any
the sensitive species considered potentially occurring are shrubs which are easily detectable
adolphia (Adolphia californica), wart-stemmed ceanothus (Ceanothus verrucosus), sea
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case, most of these species would have been detectable during the survey period. Five of
throughout the year. This list includes Encinitas baccharis (Baccharis vanessae), California
dahlia (Coreopsis muritima), and Orcutt's hazardia (Hazardia orcwii). San Dieguito sand-
aster (Corethrogyne filaginifoiia vu. linifolia) is an herbaceous perennial which would
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have been present and observable during the survey period. Although the closely-related
species Corethrogynefilaginifolia var. virgata occurs onsite, San Dieguito sand-aster was
Non-
detection indicates that they do not occur onsite, at least in any significant numbers. This
group includes Orcutt's spineflower (Chorizanthe orcuttiana), Palmer's grappling hook
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I not detected. Finally, three annual species were considered potentially present onsite. All
of these would also have beem present and detectable during the survey period. I I
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I (Harpagonella palmer?), and Nuttall's lotus (Lorus nuttallianus). Orcutt's spineflower,
while past flowering, would have been detectable to generic level during the survey period.
flowering. The level of habitat disturbance is probably the limiting factor for this species
onsite. Nuttall's lotus occurs on sandy beaches, and is therefore limited from occurrence
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Palmer's grappling hook is an inconspicuous annual which would also have been past I
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onsite by lack of suitable hatitat
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Animals
High interest admd species are officially listed by the U.S. Fish and Wildlife Service
(USFWS i985b) and the California Department of Fish and Game (CDFG 1980). No
sensitive animal species were detected onsite. No sensitive amphibian species are expected
to utilize this site. Potentially-occurring reptile, bird, and mammal species are discussed
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~ A number of declining reptile species are known from the County. These species are con-
sidered sensitive due to their restricted distribution, which is being compounded by on-
going habitat loss as a result of urbanization of the coastal plain region. In addition, the
populational status of many of these species is poorly known.
Orange-throated whiptail (Cnemidophorus hyperythrus beldingi) is a candidate for federal I
I listing (Category 2), protected by the California Department of Fish and Game, and
considered threatened by the San Diego Herpetological Society (SDHS 1980). The princi-
pal threat to this species is loss of habitat It is still locally common in many areas where it
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does occur. This species could also be expected in scrub habitat onsite.
San Diego harned lizard (Phrynosoma coronutum blainvillei] is a candidate for federal list-
ing (Category 2), protected by the California Department of Fish and Game, and con-
sidered endangered by the San Diego Herpetological Society (SDHS 1980) due to habitat
destruction and collecting for the pet trade. It is still relatively widespread and common in
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I San Diego County. This species could also be expected throughout low scrub habitat
I onsite.
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I Silvery legless lizard (Aniella pdchra pulchra) is considered threatened by the San Diego
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Herpetological Society (SDHS 1980). This secretive species appears to occur in highly
localized populations near drainages, and would be most likely onsite in areas of sandy
I soil.
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I Coastal rosy boa (Lichanura divirgara roseofusca) is protected by the California Department
of Fish and Game (1980 as amended). This species is widespread throughout the County I
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I in dry, rocky chaparral and desert habitats, usually near drainages with intermittent
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streams. Coastal rosy boa is declining due to habitat alteration. Although this species is
more likely to occur south of the site in relatively natural habitat, individuals could occa-
sionally occur here.
Birds
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Least Bell's vireo (Vireo bellii pusillus) is an obligate riparian habitat bird species which
This
means that it requires riparian woodland vegetation in which to carry out its life cycle.
Vis anive in San Diego County in late March to early April and leave for their Mexican
wintering grounds in September. All reproductive activities, from pair formation to fledg-
ing of young, occur in well-defined territories; usually willow-dominated riparian vegeta-
often retuning to the same general area used the previous year (Salata 1983).
The very small amount of riparian habitat onsite is not "prime" habitat, but is structurally
adequate for nesting by least Bell's vireo. This habitat could probably support a maximum
of one pair. The probability of this species utilizing riparian habitat onsite is very small,
however, due to the small areal extent of this habitat, its isolated status, the traffic on
Palomar Airport Road, and the disturbed nature of the surrounding area.
In addition to least Bell's vireo, several other breeding bird species of concern are
associated specifically with riparian woodland habitat. These sensitive bird species include
willow flycatcher (Empidonax fruillii), yellow warbler (Dendroica petechia), and yellow-
breasted chat (Icteria virens). Brown-headed cowbird (Moloth ater) parasitism in com-
I prefers habitat with a dense understory under 3 m in height (Goldwasser 1981). i
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tion with a dense understory. The species appears to be highly site tenacious, with males
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I bination with habitat loss are suspected as the major reasons for the decline of these
species. None of these species was detected onsite, although a small amount of marginally I I suitable habitat is present in one location.
A lacally declining upland bird species is the black-tailed gnatcatcher (Polwptila melunura
californica) (Everett 1979; Remsen 1978). This species is associated with coastal sage
scrub habitat (Atwood 1980). Within the project area, one individual was detected in
and one additional individual were also detected offsite to the south and west.
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marginal scrub habitat south of the existing Palomar Airpart Road. Two additional pairs
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Birds of prey, as a pup, are considered sensitive due to the overall loss of foraging and
nesting habitats. One species, red-shouldered hawk, was observed flying over the site.
This species may utilize the site for foraging to some degree, but does not nest onsite.
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I Mannnals
The only high-inte!.rest mammal species which might utilize the site is bobcat (Felis r@).
sharply in response to the fur trade. This species appears relatively common in brushland
habitat in San Diego County (Lembeck 1978) and is considered a potential inhabitant of the
study area, although it is more likely to occur in habitat south of the site.
I The bobcat became a species of concern a few years ago when trapping pressures increased
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I Habitats
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~ these habitats.
Sensitive habitats are those which are considered rare within the region, support sensitive I plants or animals, or have high productivity or wildlife value. The Conservation Element
of the General Plan for the County of San Diego (County of San Diego 1980) lists many of
I Wetland habitat is considered a sensitive resource by the California Department of Fish and I
I Game. This habitat is specifically addressed by Fish and Game Code Sections 1600-1606
(Streambed Alteration Agreement), and wetlands are also covered under the jurisdiction of
the U.S. Army Corps of Engineers permit process (Reinen 1978). Wetlands are subject to
are enforced by the U.S. Army Corps of Engineers, with technical input from the U.S.
Environmental Protection Agency and the U.S. Fish and Wildlife Service. Wetland habitat
which total 0.10 acre, six disjunct areas of riparian scrub which total 0.48 acre, and mesic
An
I Clean Water Act permit provisions regulating dredge and fill operations. These provisions
I within the road widening alignment consists of two disjunct areas of riparian woodland
vegetation comprised of wetland associated herbaceous species (0.003 acre).
additional 0.24 acre (riparian woodland = 0.03 acre; riparian scrub = 0.21 acre) could be
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I I impacted during road construction. Although no wetland vegetation lies within the channel
alignment, approximately 0.31 acre of riparian habitat offsite to the south will be indirectly
impacted by channel construction due to diversion of a portion of the water source which
I currently supports this habitat. The total wetland vegetation within the influence of this
I project therefore amounts to 1.13 acres. The small size, fragmented nature, and
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I structural makeup of this wetland do not comprise valuable wildlife habitat in a regional
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I context. Nevertheless, the project may req& a 404 permit from the Corps of Engineers, a
Streambed Alteration Agreement from the California Department of Fish and Game, and a
Coastal Development Pennit from the California Coastal Commission.
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I Southern oak woodland is considered a sensitive habitat in San Diego County, primarily
because of its limited acreage and high wildlife value. Several oak trees occur near the
I eastern end of the project area, between the proposed and existing channels. These trees
occur as scattered individuals. Betterdeveloped oak woodland occurs offsite to the east. I
I Two oak trees occur in or directly adjacent to the channel alignment, and could be affected
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I DISCUSSION AND IMPACT ANALYSIS
I I This project will result in the permanent loss of approximately 0.89 acre of wetland habitat
due to road widening and the proposed channelization. A short-term impact during road .
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construction of up to an additional 0.24 acre (0.03 acre of riparian woodland and
0.21 acre of riparian scrub) will occur from construction activities immediately adjacent to I
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the proposed road widening alignment, bringing total wetland impacts to 1.13 acres. These
temporarily disturbed areas will probably revegetate naturally. In addition, habitat adjacent I
I to the alignments could also be significantly affected if construction practices are not
confined to the immediate alignment area. Expected habitat losses are detailed below.
Impacts within the grading area for the road widening project:
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I Habitat AcreagieImr, acted
I Disturbed coastal sage scrub 1.53
I Riparian woodland 0.10
I *Disturbed habitat 22.4
I Riparian scrub 0.48
Total 24.5
*Includes agriculture (0.74 acre), but excludes existing Palomar Airport
I Mesic vegetation o.003
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I Road.
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I Additional impacts outside the road widening alignment due to construction:
Acreage Imuacted
Riparianwoodland 0.03
Total 0.24
I Riparian scrub u
Additional impacts within the road detour alignment: I
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I HabitaP Acreage ImDacted
Distllrbed habitat 0.1 I
I Total 0.1 I
I *This includes habitat outside the road alignment area. In areas of overlap,
and included in previous table. I impacts are tabulated for the road widening portion of the property only,
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I Impacts within the channel project area:
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I Habitat Acreape ImDacted
I I Directs Indirectb W2aa hQam
Disturbed habitat 1.04 --
Riparian woodland 0.04
Freshwater marsh 0.2 1
~ Mesic vegetation 0.0 1
I Unvegetated channel/open water - m
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I Total 1.04 0.3 1
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a Direct impacts include those occurring from channel construction.
I b Indirect impacts include those occurring to wetlqnd habitat offsite as a
The entire project (road widening, road detour, and channe1))as designed will result in
I result of water diversion from the existing channel.
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I significant impacts to biological resources from loss of wetland habitat, and mitigation
measures will be required under the California Environmental Quality Act. Because
impacts to wetland vegetation total more than 1 acre, this project may need a permit under
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I the U. S. Army Corps of Engineers Clean Water Act Section 404 permit process, and
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I permit application to the Corps of Engineers will be required. A Streambed Alteration
Agreement will be required from the California Department of Fish and Game for the
channelization at the east end of the project area. Furthermore, the project is located in the
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I coastal zone, and may require a Coastal Development Permit from the California Coastal
Commission, as well.
Project implementation will result in an incremental loss of habitat for potentially-occurring
reptile species and foraging habitat for raptor species (including red-shouldered hawk).
These losses are considered a cumulative impact in a regional context, but are not a
significant effect of this project.
One black-tailed gnatcatcher was detected within the road alignment, and project
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implementation will result in the loss of habitat for this individual. Loss of this individual
onsite represents a cumulative, adverse, but nonsignificant impact to this species.
The loss of one to two oak trees as a result of channel construction is also not considered
significant in a regional context. Additional oak trees south of the channel alignment will
not be adversely affected by the diversion of water to the existing channel, since these trees
occur in upland areas.
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I An alternative was also addressed which is comprised of changes in the grading plans for
the road widening and detour road alignments as a result of lowering Paloma~ Airport Road I
about 5 feet in the western end of the alignment. Although this will result in an increase in
cut slopes amounting to an extra 66,OOO cubic yards, impacts to biological resources under
this alternative are not significantly different than under the proposed plan. Overall, the
alternative would result in additional impacts to disturbed habitat of 1.52 acres (road
widening = 1.02 acres; detour road = 0.50 acre), and an increase of 0.02 acre of impacts to
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riparian woodland. The alternative will also result in a decrease in impacts to disturbed
coastal sage scrub of 0.28 acre. I
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I RECOMMENDATIONS
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I The loss of 1.13 acres of wetland vegetation as a result of this project will require
mitigation, most likely at greater than a 1 : 1 ratio. A conceptual mitigation plan is included I
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as Attachment B to this report. General recommendations to reduce impacts to remaining
I biological resources are provided below.
I Construction Practices
Impacts to wetland vegetation adjacent to the grading areas would be reduced by adherence
to certain construction practices, as outlined below. The greatest loss of habitat is expected
from the use of heavy equipment in wetland areas, on and offsite. Nonsensitive
construction practices would result in additional impacts to wetland vegetation which could
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inmase the total wetland impact acreage, and ultimately, the amount of mitigation required.
1. Heavy equipment and construction activities would be restricted to the grading areas to I
the greatest degree possible in order to reduce direct impacts to wetland habitat.
Construction of cut and fill slopes, and equipment used for this construction, will be
kept within the limits of grading. Prohibited activities in the wetland habitat include
staging areas, equipment access, and disposal or temporary placement of excess fill.
Construction limits and wetland habitat would be flagged by a qualified biologist.
grading activities do not affect additional acreage. Any unauthorized impacts caused by
construction operations would require that the contractor replace all habitat to its
original condition, with wetland habitat most likely being restored at greater than a 1: 1
ratio.
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Construction activities would be monitored by an onsite inspector to ensure that
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I I 2. Retain existing pipes in areas where wetland vegetation occurs in order to avoid
additional wetland habitat removal. It is acknowledged that new pipes will need to be
placed.
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I 3. Fueling of equipment should not occur in any portion of the site near the intennittent
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I Upland Habitat Replacement
stream in Canyon de las Encinas.
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Although the loss of coastal sage scrub onsite is not considered a significant affect of this
project, it is recommended that manufactured slopes not included in wetland mitigation
(Le., those at the western end of the road alignment and south of Palomar Airport Road, I l and all manufactured slopes north of Palomar Airport Road) be revegetated with native
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scrub species found in the area. Revegetation of these areas would have the added benefit
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I of pviding habitat for the California black-tailed gnatcatcher. Species suitable for this
I revegetation include the following:
Artemisia calfomica California Sagebrush
I Eriogonum fasciculatum Flat-topped Buckwheat
I Lotus scoparius Deerweed
Salvia milVera Black Sage
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I Sahriaqiuna White Sage
I I Haplopappus venetus Goldenbush
~ Lupinus spp. Lupine
Eschscholzia cal~om'ca Califumia Poppy
The coastal sage scrub revegetation areas could be effectively hydroseeded,
followed by a tackified straw mulch. Materials and seed mixes may be changed
topped buckwheat will dominate the seed mix (30 pounds per acre each)
followed by deerweed (20 pounds per acre), with the remaining poundage
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I only with the approval of the project biologist. California sagebrush and flat-
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I divided among the other species. Materials should be applied in the following I
I recommended proportions:
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I First Amlication - Hvdroseedi ng I
I 1750 lbdac wood cellulose fiber
Fertilizer 500 lbdac
I Seed 130 lbdac
I Binder 120 lbdac I
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I Second ApDlication
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I straw 1-3/4 Wac
Fiber 300 lbdac
Binder 100 lbdac I
I This habitat should be irrigated as needed for the fnst year to accelerate
establishment and coverage. The hydroseeding should be completed in the
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summer, if possible, so as to establish cover prior to the rainy season. A
number of annual species are included in the hydroseed mixture (California
poppy and lupines) to provide color to the slopes. These species should reseed
themselves yearly.
Jute matting should be used as necessary on certain slopes based on steepness
and soil type. Such matting could aid in erosion control and plant
establishment. The use of matting will be left to the discretion of the applicant's I
I landscapemhim
I Additional Recomrnenda t ions
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I Two coast live oak trees occur within the channel impact area (Figure 9). At least one of
these trees will be directly impacted by construction activities. If complete removal is not I
I necessary, then this tree should be properly pruned by a qualified arborist prior to the onset
of construction to minimize damage. These two trees and other oaks to the south should be I
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staked and flagged by qualified personnel prior to the onset of construction. Aside from
the two oaks within the channel construction area, all construction activities should be
prohibited within 10 feet of the dripline of oak trees. This includes equipment as well as
earth-moving activities.
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REFERENCES CITED
American ornithologists' Union, Committee on Classification and Nomenclature. 1986. Thirty-fourth Supplement to the A.O.U. Checklist of North American Birds. The Auk 99(3).
Atwood, J. 1980. The United States distribution of the California black-tailed gnatcatcher. Western Birds 11:65-78.
California Department of Fish and Game. 1985. Designated endangered or rare plants. The Resources Agency, June 19.
County of San Diego. 1980. Conservation Element (Part X) of the County general plan.
Everett, W.T. 1979. Threatened, declining, and sensitive bird species in San Diego
Goldwasser, S. 1981. Habitat requirements of the least Bell's vireo. California
Holland, R.F. 1986. Preliminary descriptions of the terrestrial natural communities of -
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I Planning Department, GPA-80-61.
I
County. San Diego Audubon Society, Sketches, June.
Department of Fish and Game, Sacramento. Unpublished report.
Cali€omia. State of California, The Resources Agency.
I
I
I Jennings, MR. 1983. An annotated checklist of the amphibians and reptiles of California. California Fish and Game 69(3):151-171.
Revised checklist of North American mammals north of Mexico. Occasional Papers of the Museum Texas Tech University 80 1-22.
Game, Nongame Wildlife Investigations, Study IVY Job 1.7.
I
I Jones, J.K., Jr., D.C. Carter, H.H. Genoways, R.S. Hoffman, and D.W. Rice. 1982.
I I
I
I
kmbeck, M. 1978. Bobcat study, San Diego County. Califomia Department of Fish and
Munz, P.A. 1974. A flora of southern California. University of California Press,
Reinen, R.H. 1978. Notice of exercise of Section 404 jurisdiction over certain streams
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I Berkeley.
and wetlands in Caiifurnia. Los Angeles District, Corps of Engineers, Jury 15.
vulnerable birds in California. Western Field Ornithologist, Museum of Vertebrate
Salata, L.R. 1983. Status of the least Bell's vireo on Camp Pendleton, California: Report on research done in 1983. Unpublished Report, U.S. Fish and Wildlife Service, Laguna Niguel, California.
San Diego Herpetological Society. 1980. Survey and status of endangered and threatened
I
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I I Remsen, V. 1978. The species of special concern list: an annotated list of declining or
I Zoology, University of California, Berkeley.
I
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I species of reptiles natively occuning in San Diego County. Prepared for Fish and
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Wildlife Committee, San Diego Department of Agriculture, 33 pp.
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26
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I , Smith, J.P., Jr. and R. York. 1984. Inventory of rare and endangered vascular plants of
California. California Native Plant Society, Special Publication No. 1 (3rd Edition).
Thorne, RF. 1976. The vascular plant communities of California. In Symposium proceedings-Plant communities of southern California. June Latting (editor). Califorpia Native Plant Society, Special Publication No. 2.
United States Department of Agriculture (USDA). 1973. Soil Survey, San Diego area,
Wayne, G. 1987. Planner, City of Carlsbad. Personal communication with P. Gordon-
I
I California.
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Reedy, December.
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I ATTACHMENT A
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I FLORAL SPECIES LIST
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ATTACHMENT A
FLORAL SPEClES LIST
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Familv Common Name
Dicotyledoneae
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I Ahaceae - Carpet-WeedFamily
Carpobrotur aequilateralus Sea-Fig
I I Gasoul crysrallinum Ice-Plant I I
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Gasoul nodifom Little Ice-Plant
I Anacardiaceae - Sumac Family
I Rh integrifolia Lemonadebeny I
Apiaceae (Umbellifeme) - carrot Family
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Foeniculum vulgare Sweet Fennel
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I Asteraceae (Compositae) -Sunflower Family
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I Artemisia califonzica California Sagebrush
I Baccharis glutinosa Mule Fat
I Ambrosia confertiflora Weak Leaf Burbush
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I Anthemis cotula Mayweed
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I Baccharis pilularis ssp. consanguinea Coyote Brush I
I Caly&& tenella Rosin Weed
I Centawea mekruis Tdote
Chrysanthemum coronarim Annual Chrysanthemum
Cirsium sp. Thistle
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I Coryza canadensis Horseweed
I Corethrogyne filaginifolia var. inem Sand- Aster I
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Cotula coronopifolia Brass-Buttons
Cywa carkulus Cardoon
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Gnaphalium bicolor Cudweed
Gnaphalim cal~om'cm California Everlasting
Haplopappus squarrosus ssp. grindelioides Hazardia
Haplopcppus venetus ssp. vernoniodes
I Hernizonia fmci- TarWeed
Coastal Isocoma
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I Heterotheua grandiflora Telegraph Weed
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I ~se?Yiola Prickly Lettuce
I Picris echiodes Bristly Ox Tongue I
Sitybwn maram Milk Thistle
Sonchus oleraceus Sow Thistle
stephanomet?a exigua Small Wreath-Plant
Xanthiwn saumarium
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var. canaderne Cocklebur
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Borginaceae - Borage Family I
I Heliotropium curassmicum
I var. oculatum Chinese Pusley I
I Brassicaceae (Cruciferae) - Mustard Family
I Brassica nigra Black Mustard
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I Raphanus sativus Wild Radish
I Sisymbriwn altissimwn Tumble Mustard
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Cactaceae-CactusFamily
Opuntia linoralis Coastal Prickly Pear I
I Capparaceae-CaperFamily
I var. arburea Bladderpod
I Caprifoliaceae - Honeysuckle Family
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I Isorneris &rea
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I sarnbwusmexicana Elderberry
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Catystegia macrostegia Morning Glory
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Phtaginaceae-PlantainFamily I
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I Planragolanceolara Natrow-Leaf Plantain
Polygonaceae - Buckwheat Family
I Eriogonum elongam Long-Stemmed Eriogonum
Eriogonum fasciculatum
Rumex crispus Curly Dock
I ssp. fasciculatum California Buckwheat
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I Primulaceae - Primrose Family
~ Anagallis arvensis Scarlet Pimpernel
I I Rubiaceae - Madder Family
I Galium angustifolium Narrowleaf Bedstraw
Salicacm -Willow Family
I Salk laswlepis
I var. bracelinae Arroyo willow
I Solanaceae - Nightshade Family
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Datura meteIoides . Jimson Weed
NicotiaM gha Tree Tobacco
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I Solanum douglasii Douglas Nightshade
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I Monocotyledoneae
I Cyperaceae -Sedge Family
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Cyperus altenrjfolius Umbrella Plant
Scirpus sp. Bulrush
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I Arundodonax Giant Reed
Poaceae (Gramineae) - Grass Family
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I Avena barbata Slender Wild Oat
Bromus diandrus
Bromus mollis Soft Chess
Bromus rubens Foxtail Chess
I I Ripgut Grass
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I cortaderiaatacame?lsis Pampas Grass
Cywdon dactylon Bermuda Grass
Hordeum vulgare Common Barley
L,umurckiaaurea Goldentop
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I Lolim perenne
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ssp. multiform Italian Ryegrass
I Paspalumdi~ Dallis Grass
I Penniseturn setacem Fountain Grass
I Phalarissp. Canary Grass
Poiypogon monspeliensis Rabbitfoot Grass
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~ Sorghum hulepense Johnson Grass
I Stipa sp. Bunchgrass
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I Ty~hac- - cattail Family
I TYPk SP. cattail
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I 1. Nomenclature follows Mmz, 1974.
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ATTACHMENT B
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I I CONCEPTUAL MITIGATION PLAN
FOR THE
PALOMAR AIRPORT ROAD WIDENING
AND ASSOCIATED ROADWAY
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I IMPROVEMENTS PROJECT
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21
TABLE OF CONTENTS
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TITLE PAGE I
I INTRODUCTION B- 1
~ REVEGETATION PLAN B- 1
MAINTENANCE AND MONlTORINGPROGRAM FOR THE REWEGJiTATION PLAN B-13
purpose B-13
Technical Monitoring B-13
Goals B-13
I TiiFrame B-13
Methods B- 14
B-16
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I Maintenance
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I LIST OF FIGURES
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NUMBER TrrLE PAGE
I B- 1 Map Index for Figures B-2 through B-6 B-2
I B-2 Conceptual Revegetation Plan 33-3
I B-3 Conceptual Revegetation Plan B-4
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B-4 Conceptual Revegetation Plan B-5
B-5 Conceptual Revegetation Plan B-6
I B-6 Conceptual Revegetation Plan B-7
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INTRODUCTION
The following report details the proposed wetlands mitigation plan for the City of
Carlsbad's Palomar Airport Road project. Project implementation will result in direct
impacts to wetland vegetation during the road widening phase totalling 0.82 acre, while
wetland habitat loss. The overall loss of 1.13 acres of wetlands is considered significant.
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I I indirect impacts from channel construction will amount to an additional 0.31 acre of
The purpose of this plan therefore is to offset the wetland habitat losses incurred by the
proposed project by reconstructing, revegetating, monitoring, and managing approximately
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I 1.73 acres of wetland habitat.
REVEGETATION PLAN
The riparian revegetation plan proposes to create wetland vegetation primarily in the
easement, south of Palomar Airport Road (Figure B-1 provides an index to revegetation
proposes to extend the city's channel westward, along the south side of Palomar Avport
Road. This offsite channel, which is contiguous to the City's slope easement, will be
vegetated with riparian species as outlined in a mitigation plan currently being prepared
(WESTEC Services, in progress). Riparian species in the offsite channel would then be
continuous with riparian vegetation proposed for lower slopes in this plan. Under the
City's mitigation plan, riparian vegetation will only occur at the lower elevation of slopes
within the slope easement, and will be concentrated near points where the water source is
expected to be increased (Le., near storm drains). These "nodes" of woodland vegetation
will ultimately be self-supporting, and will also densify and increase the width of the
riparian corridor through this area, resulting in a continuous band of wetland vegetation that
will be wider than could occur from either project alone. Wetland areas will be buffered
from the proposed roadway and future development to the south by a transitional area of
upland vegetation at the higher slope elevations. Existing wetlands are primarily composed
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I channel at the eastern end of the project site and at selected areas within the roadway slope
areas depicted in Figures B-2 through B-6). It should be noted that an adjacent project I
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I of small, disjunct patches of habitat; the revegetation plan proposes to densify and expand
wetlands in selected areas, thus improving the overall habitat value of onsite wetlands for I
I wildlife.
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I I Mitigation for direct and indirect project-related wetland impacts is proposed at an
approximately 131 ratio. Replacement acreage is expected to be 1.5 acres of riparian
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B- I
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woodland habitat (0.17 acre of woodland habitat will be impacted, so this constitutes a
allowed to revegetate naturally in the channel. This will replace the 0.21 acre of marsh
habitat which will. be impacted, at approximately a 1: 1 replacement ratio. Overall, wetland
vegetation onsite willkrease by 35 percent (1.13 acres impacted which includes mesic
vegetation and bare channel; 1.73 acres after revegetation) as a result of the revegetation
effort. An additional 1.6 acres of transitiondl wetlandupland habitat will also be
incorporated into the revegetation plan by plantinlg on upper elevation slopes, and will act
of riparian scrub, since it will include a greater plant species diversity and will provide a
higher wildlife value than existing riparian scrub, which currently exists as a depauperate
association of mulefat and coyote brush.
I 8.8:l replacement ratio). Freshwater marsh vegetation (approximately 0.23 acre) will be
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I as a wetland buffer. This shrub association is expected to partially compensate for the loss
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I Table 1 provides a breakdown of wetland habitat losses expected as a result of this project
association on upper slopes. Each wetland revegetation area is discussed below, along
and the replacement acreage for each habitat type, exclusive of the transitional shrub
with specifics of the revegetation plan.
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Table 1 I WETLAND HABI'l T LOSSES AND REPLACEMENT ACREAGE
Acreage Acreage Habitat I!ml!ad ReDlaced Total
Riparian woodland 0.17* 1.5 +1.33
I -0.69 Freshwater marsh 0.2 1 0.23 +0.03
-0.05
I 1.73 +0.60 ~ Bare channel 0.05 1.13
I ** Indudes individual occurrences of mulefat (Baccharis gluzimsa) *** To be replaced by 1.6 acres (not included in wetland mitigation ratios) of
I transitional WetlancUupland habitat.
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Riparian scrub 0.69** ,,,***
Mesic 0.013 --- -0.013 --- -
I * Includes individual Occurrences of willows (Salk spp).
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I Channel
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Vegetation of the new channel and its south slope will be accomplished utilizing
native plant species as specified herein (Figure B-6). Proposed species include
arroyo willow (Salk Laswlepis), westem sycamore (Plaranus racemosa), white
alder (Alnus rhombgolia), desert elderberry (Sambucus micana), and mulefat I
B-8
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(Baccharis glutinosa). Acreage in the bottom of the channel amounts to
approximately 0.46 acre. The center 10 feet of the 20-foot wide channel bottom
(0.23 acre) will be pnmanly freshwater marsh, which is expected to revegetate
naturally.
Riparian woodland will be developed along the edge and lower slopes of the
channel. Low zones (Le., the channel edge and lowest slopes) will
also flood during storm events. Willows will be planted as cuttings or as bands
inches in height. The U.S. Fish and Wildlife Service has recommended that
bands be considered as part of riparian vegetation plans.
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I accommodate willows in continually wetted areas from general runoff, and will
on 3-foot centers. Bands are individual willow plants approximately 6 to 12
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I Away from the low zones the planting mix will reflect trees and shrubs typical
This adjacent zone will be typified by western sycamore, white alder, and desert
groups of 5 to 10. Riparian vegetation on the slope will be densified by
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of ripariadfldplain habitats but which do not depend on consistent moisture.
elderberry. These larger trees should be planted on 10-15 foot centers in
understory plantings of mugwort (Artemisia douglusiana), California wild rose
(Rosa californica), and blackberry (Rubus ursinus), which will be planted from
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I container stock and should be interspersed amongst the trees. California wild
rose (Rosa californica) and blackberry (Rubus ursinus) can also be utilized at I I higher elevations on slopes. A shrub association dominated by toyon
(Heteromeles arblltifoliu) and desert elderberry will be planted on the upper I
I portion of the slope in this area.
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Riparian revegetation areas will also be hydroseeded following planting of
cardinalis), and tall evening primrose (Oenothera hookeri). All riparian
stock could be put on drip irrigation. As noted earlier, the irrigation system is
designed to establish the plants and then be withdrawn as appropriate.
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I container stock with such species as mugwort, scarlet monkeyflower (Midus
revegetation areas will be covered by overhead irrigation, although the container I
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The northern slope of the channel will be riprapped. It is recommended that
some topsoil be placed over the riprap and this area vegetated with native I
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species which will provide high wildlife value such as desert elderberry, toyon,
and mulefat.
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I I Wetland habitat replacement within the slope easement is limited by available
water supply and elevation, rather than available land. Existing riparian
sea level to above 100 feet, and is dependent upon supplemental water sources
80-90 feet elevation only in the eastern portion of the alignment. In this
location, however, the proposed channel bottom is proportionately higher, as
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I vegetation in the project ma occurs at elevations from about 60 feet above mean
and/or a high water table. Riparian revegetation efforts on slopes will exceed I I
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I well, averaging about 112 feet.
Approximately 2.7 acres exist within the Southern slope easement for Palomar
Auport Road which will be available for revegetation. Because of the restricted I
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water requirements of the desired wetland vegetation, riparian revegetation is
proposed only for lower slopes in this aaea and is further restricted to "nodes" ~
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I of woodland vegetation to be concentrated at the discharge points of the storm
drains to ensure the optimal conditions for their long-term suntival. Clustering
of woodlands may provide a further benefit by densifying riparian habitat in the
type of species gradient discussed in the previous section is suggested for road
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proposed offsite channel, should that project be constructed. In general, the
easement slopes, Le., willows at the lowest elevation. Mulefat can also densify
this wetter habitat zone and it is suggested that this species be utilized, but
The
upper slope will be revegetated with a toyodelderbeq-dominated shrub
rose, blackbeny and San Diego marsh-elder (Iva hyesiana) as described in the
previous section. Supplemental irrigation will be required on slopes until the
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I sparingly, so as not to compete with the establishment of the willows.
association which can be densified by additional species such as California wild I
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I vegetation is well established Figures B-2 through B-5 illustrate the schematic
revegetation plan for road easement slopes. I
General design, planting, and maintenance guidelines pertinent to all revegetation areas are
outlined below: I
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The City of Carlsbad's Engineering Department (applicant) shall assure the
long-term conservation of the revegetated wetland by dedicating the mitigation
site and buffers as part of a natural open space easement. The City of I
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I Carlsbad's Planning Department will place an open space restriction in this
acreage which would eliminate future lidding activity. However, roadway or I
channel realignment within the openlspace easement required for health and/or
safety reasons would be permitted, although they would be subject to
environmental review and mitigation. The area will be set aside for the
preservation of wildlife habitat.
The applicant will ensure that the final revegetation plan shall be designed and
conducted under the supervision of a qualified biologist, knowledgeable with
riparian ecosystems in southern Califcrnia, using state-of-the-art native plant
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I revegetation techniques.
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I All trees and shrubs will be planted as container stock, cuttings or bands, as
obtaining the appropriate number and species of plants as specified in the final
mitigation plan. This will involve cont;ming the nursery that will provide plant
preparing material. Substitution of plant materials will not be allowed without
the concurrence of the project biologist.
I previously discussed. The landscape contractor shall be responsible for
I materials as far in advance of planting as possible to provide ample time for I I
I Planting should not be done during the hot summer months. The highest
preferably November through February, with December and January being
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survival rates result when willows are planted during the rainy winter season,
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The applicant shall ensure that sufficient water is supplied to the revegetated
for the establishment of rooted cuttings, and a drip irrigation system will be
development. Irrigating only the top llqyer of soil promotes shallow root growth
plants far the life of the project. An overhead irrigation system will be required
needed for container stock. Plants will be watered deeply for good root
that will not support mature plants after irrigation is discontinued.
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B-11
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tl . The applicant shall ensure that the western sycamores used are not inoculated to
prevent heart rot.
The applicant shall ensure that landscaping between future development to the
south and riparian revegetation areas emphasize trees and shrubs which
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I The applicant shall monitor the success of the revegetation effort for a 5-year
period (the monitoring program is discussed in detail below). Container plants
will have a survival rate of 80 percent and will result in 100 percent covef after
three years. The applicant shall replace those plants for the amount short of the
80 percent survival rate or if needed to iittain 100 percent cover. If, at the end
of the third year, 100percent cover in hydroseeded areas has not been
obtained, the applicant will reseed the areas which have not reached
100 percent cover. This will allow 3 yeim of monitoring to OCCLU on container
plantings. Dead plant material will be replaced with the same size material as
was originally planted. Replacement planting will be done in the winter.
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The applicant shall, for the 5-year period, manually control undesirable
pampas grass (Curtudkriu sp.), tree tobacco (Nicotiana glauca), and castor bean
(Ricinus communis), which becomes established within the wetland areas
onsite.
The applicant shall not prune or conduct other manicuring activities to the native
species which become established within the revegetation area, including the
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All of the above noted mitigation features will be completed by the applicant
I within 5 years of receipt of the 404 pamit. Mitigation will occur as soon as
possible following final grading of revegetation areas. Revegetation efforts will
be phased to allow planting to occur in these areas as soon as possible after
revegetation efforts for that portion will. commence, rather than waiting for all
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grading commences (e.g., as won as a portion of the grading is completed,
onsite grading to be completed). Conditions dealing with monitoring,
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maintenance and removal of exotics will commence upon onset of grading and
continue for 5 years from that time. I
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I The applicant will ensure that a qualified biologist clearly mark the channel area
and revegetated slopes as sensitive and construction-free areas. Any damage to
the revegetation site during constructiori processes associated with this project
or adjacent projects will be repaired by the applicant. l
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MAINTENANCE AND MONITORING PROGRAM FOR THE REVEGETATION PLAN
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I 1. Purpose
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I The intent of this program is to ensure successful riparian habitat revegetation and to
develop a data base through monitoring, maintenance, and technical management of the
vegetation effort for future use. I
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2. Technical Monitoring
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I The program will document the regrowth and development of shrub understory
and tree overstory plantings. Monitorkg will consist of height, percentage of
vegetation levels. The monitoring program will also address the progress of
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coverage, and survivorship measurements and/or calculations of the two
implementations and determine the need for remedial action (including the
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I I The study will begin before the first day of roadway construction activities,
continuing its observation of the revegetation plan to its completion, and then
monitoring its progress for five years following completion of all revegetation
activities. The purpose for initiating the monitoring period at the onset of
construction activities is to ensure &,at designated sensitive areas are not
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V C. Methods
I Monitoring methodologies should be kept constant throughout the study to
avoid inconsistencies, and ensure usefiess of the data. The study area will
include the following areas: the channd at the eastern end of the alignment and
its associated slopes, and the slope easement south of Palomar Airport Road.
Adequacy of the revegetation efforts anid design will be determined by the long-
term analysis and study of plant growth and species composition. Monitoring
will involve the following:
1. Retain a qualified biological corisultant to monitor and report on the
team selected to conduct the monitoring program will have a broad
background in vegetation sampling. The consultants should have at least
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I progress of revegetation efforts. 'ne biological consultant or consultant
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two years of local experience, and a minimum of a Bachelor's degree in
biology, botany, zoology or wildlife management.
2. Obtain a 40-foot scale topographic: map or drawing of the project site for
field notes.
I 3. A qualified biologist should be present onsite during the initial grading
period to ensure that riparian habita.t proposed to be retained is not impacted
during this phase. This may include flagging and/or staking the limits of
grading and ensuring that sensitive: areas outside the grading limits are not
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but which is disturbed or removeld during any phase of the construction I I
pracess, shall be replaced by the aplplicant at an appropriate ratio.
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I 4. A qualified biologist should check: the site upon completion of grading to
ensure that riparian revegetation iU=S are at an appropriate elevation to
support the specrfied wetland vegetation.
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5. The biological consultant shall examine plants to be used in the revegetation
growth, free from disease and insects, and that the species and quantities of
program prior to planting to ensure that they are vigorous, of normal
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I plants specified in the final vegetation plan are utilized, and that these
species axe apppriately placed within the revegetation area.
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6. Permanently establish two plots; one in each wetland revegetation area for
each of the vegetation levels (shrub idexstory and tree overstory).
7. Photographs and field notes shaL1 be employed for each of the plots
monitored. Permanent photodocumentation points should be established
during the first year. Monituring shall be bi-monthly during the first year,
semi-annually through year three, and annually for the fourth and fifth
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8. Color photography and field notes shall clearly depict the height, cover and
survivmhip rates of the two vegetation levels. Survival rate of container
plants at the end of the second year of monitoring will be 80 percent, with
replacement efforts will be required by the landscape contractor.
Hydroseeded areas will attain 100 percent cover at the end of 3 years or
noted on the 40-foot scale topographic map or site plan drawing for the
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- 100 percent cover, excluding herbs, after three years. Otherwise, -
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reseeding will be required. All observations, measurements, etc., shall be
project.
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I I Reports summarizing the monitoring pn>gram and establishment progress of the
Department at six months, one year, arid annually thereafter. Copies of these
reports will also be sent to the U.S. Army Corps of Engineers, U.S. Fish and
Wildlife Service, and California Department of Fish and Game, and California
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revegetation program will be submitted to the City of Carlsbad's Planning
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I 3. Maintenance
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I Maintenance of the revegetation area shall occur for a period of five years.
Routine maintenance will consist of two elements: bioflandscaping and I
~ aesthetics.
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\r I 1. Routine irrigation shall be maintained at a level specified by the landscape
aFchitem
2. Routine~emoval of all trash of litter will occur.
3. All dead ar diseased plants will be renioved and new plants replaced in
kind. The need for replacement will be determined by the landscape
architect and/or the biological consultant.
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4. Periodic control of pests such as insects, ground squirrels, gophers, and
weedy plants such as pampas grass, tamarisk, castor bean, tree tobacco and
giant reed shall occur as specified by the landscape architect and/or I
biological consultant. I
I 5. Biological control agents within channel revegetation areas will be limited to
. those acceptable to the monitoring biologist.
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I 6. Manicuring of channel revegetation weas will not be done except as
authorized by the project biologist.
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I 7. The channel and channel banks will be periodically examined by the
biological consultant to identify any potential erosion problems. Any
erosion areas within the channel or on he channel banks will be corrected I I
l and revegetated.
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At the completion of five years (from the date that initial revegetation is completed), the
City of Carisbad's Planning Department or their agent shall review the revegetation
program to verify that it has been successful.
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AGEND~ BitL NO. 2
PfiTEP 5/ 4 7/8s/
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ARCHAEOLOGICAL SURVEY FOR A ROAD DETOUR AND STORM DRAIN ON A PORTION OF PALOMAR AIRPORT ROAD
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Prepared for:
City of Carlsbad 2075 Las Palmas Carlsbad, CA 92008
Prepared by:
WESTEC Services, Inc.
55 10 Morehouse Drive San Diego. CA 92121
1 u Dennis Pmject Manager Gallegos
EXHIBIT 5
December 19 87
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TABLE OF CONTENTS
SECTroN TITLE PAGE ii ABSTRACT
1-1
1-1
1-1
1 INTRODUCTION
1.1 . Project Description
1.2
2 BACKGROUND INFORMATION
2.2 Record Search Results
3 FIELD METHODS AND RESULTS
3.1 Survey Methods
3.2 Survey Results
4 IMPACTS AND RECOMMENDATIONS
4.1 Impacts and Recommendations
Project Location and Environmental Setting
2- 1
2- 1
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3-3
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2.1 Culture History
REFERENCES R- 1
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ABSTRACT
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A 1.5-mile corridor along Palomar Airport Road, between Paseo del Norte and College
Boulevard, was surveyed for cultural resources in June of 1987. This survey resulted in
the relocation of two previously recorded sites (SDi-8692 and W- 117). In November of
1987, engineers from the City of Carlsbad redesigned the road improvement area to include
two additional impact areas, one on the west end of the original improvement corridor and
one area, on the east end of the comdor. The western impact area is on the south side of
Palomar Airport Road, adjacent to Paseo del Norte near the western boundary of the
improvement area. The eastern impact area is also on the south side of Palomar Airport
Road, just east of Laurel Tree Lane. Pedestrian survey of these proposed impact areas
resulted in the relocation and enlargement of previously recorded site SDi-10670 (W-l17),
near the western impact area and the identification of one additional cultural resource site
(PAR-1) in, the vicinity of the eastern impact area. Newly recorded site, PAR-1 is a shell
midden dominated by Chione sp. and Argopecten sp.. The soil is noticeably darker than
the surrounding soil and the deposit has a depth of at least 40 cm. Flaked lithic debris was
also noted on the site surface. Based on surface observations the site area is approximately
180 feet EW by 120 feet NS. No determination of subsurface site size was made. Native
oaks are present on site. This site is within the proposed impact area for associated road
improvements (storm drain construction) and it is recommended that the site be tested to
determine significance prior to project approval. Recommended testing would be limited to
the excavation of shovel test pits (STP's) to determine the site boundaries, and the
excavation of not more than four, 1 by 1 m units to sample and assess the resource area.
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SECTION 1
INTRODUCTION
1.1 PROJECT DESCRIPTION
WESTEC Services, Inc. conducted a literature review for archaeological resources and
completed a field survey of the original 1.5-mile project corridor in partial fulfillment of
CEQA requirements (as amended in 1984), in June of 1987 (Cheever and Gallegos 1987).
The addition of two previously unsurveyed impact areas was made in October of 1987.
Archaeologists from WESTEC surveyed these new areas on October 30,1987.
1.2 PROJECT LOCATION AND ENVIRONMENTAL SETTING
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The project is located in the west central region of the City of Carlsbad The impact areas,
as currently planned, are on the western end of a 1.5-mile segment of Palomar Airport
Road between Paseo del Norte and College Boulevard (Area 1) and on the eastern end of
the same road segment (Area 2). Both of these impact areas are on the south side of
Palomar Airport Road (Figures 1 and 2).
Area 1 improvements are confined between Station numbers 30i-00 and 45+00 and range
between 160 to 20 feet in width This area, as currently planned, will be a temporary detour
road. The environmental setting in the vicinity of Area 1 consists of the base of a marine
terrace or ridge that has been cut by the construction of Palomar Airport Road. Vegetation
is primarily introduced grasses and herbs and portions of the area have been used for
agriculture. Surface disturbance across Area 1 exists in the form of dirt roads and tire
furrows.
Area 2 is on the south side of Palomar Airport Road, just east of Laurel Tree Lane. As
currently planned, this area will be impacted by construction of a storm drain. Area 2
includes portions of relatively flat canyon bottom, adjacent to a creek. The soil is alluvial
and there are low, marine terraces making up the remainder of the existing landforms.
Portions of Area 2 have been disturbed by grading and unauthorized dumping, while other
areas appear to be undisturbed. The vegetation in the area is characteristic of disturbed
areas generally, consisting of non-native herbs, grasses, and thistles. However there are
stands of Coast Live Oak and Elderberry trees in the undisturbed portions of the impact
area.
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SECTION 2
BACKGROUND INFORMATION '
2.1 TURE HISTORY
In prehistoric times, the Carlsbad area was occupied by at least three, somewhat distinct
culture groups. These people are known as the San Dieguito, La Jolla, and Luiseno.
Native American people have occupied San Diego County from approximately
10,000 years ago through the present day. A detailed culture history of San Diego County
is available upon request from WESTEC Services, Inc. I
I 2.2 RECORD SEARCH RESULTS
Site record searches and literature reviews were conducted at the San Diego Museum of
Man data repository and at the South Coastal Information Center at San Diego State
University. These record searches resulted in the identification of one previously recorded
archaeological site SDi-10670 (W-117). This site is on the north side of Palomar Airport
Road and adjacent to the project area. The site is located in the vicinity of Area 1 and is
only partially within the proposed impact area. SDi-10670 (W-117) is recorded as a sparse
artifact and shell scatter which has been disturbed by agricultural activities (Rogers site
record form n.d.). An updated site form prepared by archaeologists from RBR &
Associates listed surface artifacts, on the north side of Palomar Airport Road. These
artifacts were described as split cobble scrapers and flakes of various geologic materials
(Gross et al. 1987). The metates and "digging weight" or "large bead" noted on the
original site record form by Rogers, were not relocated (Gross 1987). It was not
uncommon for Rogers to collect unique or diagnostic artifacts for curation at the San Diego
Museum of Man.
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SECTION 3
FIELD METHODS AND RESULTS '
3.1 SURVEY METHODS
Fieldwork was conducted by Andrew Pigniolo and Dennis Gallegos in October of 1987.
The survey methods applied during the field investigation conform to the guidelines and
requirements of the Society of California Archaeology (King et af. 1973) and those outlined
by the National Park Service (Scovill et af. 1972).
The project areas were surveyed on foot at an interval of 5 m, as terrain and vegetation
permitted. All areas were carefully examined for cultural debris, and road cuts and natural
drainages were checked for indications of subsurface archaeological deposits. Ground
visibility averaged 50 percent in both areas with vegetation and soil fill obscuring the
ground surface in some areas.
3.2 SURVEY RESULTS
Field survey of Areas 1 and 2 resulted in the identiflcation of an extension of archaeological
site SDi-10670 (W-117) within impact Area 1 and the location of one new cultural resource
site PAR-1 within Area 2. The portion of SDi-10670 extending within the current project
area consists of approximately 100 fragments of shellfish remains including; Chione sp.,
Donax sp., Mytilus sp., Argopecten sp., and surface artifacts. Additionally, shellfish
remains were noted in a earthen slope cut, adjacent to Palomar Airport Road. The shell
deposit was evident to a maximum depth of 15 cm below the ground surface. Artifacts
collected from the site surface include 19 flakes andor fragments of anguiar waste and one
unifacial, rhyolite mano fragment (Table 1). These artifacts were mapped on a 1"==40' map
prior to collection and were cataloged according to the procedures accepted by local
institutions. These artifacts are curated in the WESTEC Services Inc., Cultural Resource
Laboratory.
Newly recorded site PAR-1 is within impact Area 2 ( see Attachment A for the site record
form submitted to San Diego State University and the Museum of Man). This site is a shell
midden with a surface scatter of approximately 20 lithic artifacts categorized as flakes and
angular waste. These artifacts were not collected. The site area measures approximately
180 feet EW by 120 feet NS. Based on erosional cuts the shellfish deposit appears to
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extend to a depth of over 40 cm below the ground surface. The represented shellfish
species in the midden are dominated by Chione sp. and Argopecfen. sp. Portions of the
site has been disturbed by the dumping of soil fill, off site grading for a road widening, and
extensive rodent burrowing. The remainder of the site appears to be in good condition.
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TabIe 1
SDi-10670 (W-117)
COLLECTED SURFACE ARTIFACTS
SHOT# COUNT ARTTFACT MATERIAI, WEIGHT
8.4 grms 1 1 Flake Metavolcanic
2 4 Flakes Metavolcanic/ 1 1.4grms Piedra del Lumbre
chert
3 6 Angular Waste Metavolcaiic 1 OSgrms
4 1 Angular Waste Metavolcanic 1 Sgnns or
5 1 Unifacial Mano Rhyolite 381.4grms fragment
6 1 Flake Metavolcanic 2.4grms
7 2 Flakes Metavolcanic/ 3.2grms
Piedra del Lumbre
chert
8 Discarded
9 2 Flakes Metavolcanic 7.7 grms
10 1 Angular Waste Metavolcanic 0.3grms
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SECTION 4
XMPACTS AND RECOMMENDATIONS
4.1 IMPACTS AND RECOMMENDATIONS
The field survey resulted in the identification of a portion of a previously recorded
archaeological site within Area 1 and a newly recorded site, PAR-1 within Area 2. The
portion of site SDi-10670 (W-117) within Area 1 has been disturbed by agricultural activity
and construction associated with Palomar Airport Road. As per CEQA, the portion of SDi-
10670 (W-117) which extends within the project boundaries is not considered significant,
as the site integrity has been compromised and the existing site content is neither unusual
nor substantiative. The combination of these existing conditions define the portion of this
site within Area 1 as a non-significant cultural resource. As a means of providing some
information to the professional archaeological community, surface artifacts were collected,
analysed and curated and an up-dated record of the revised site boundary and site condition
kis been submitted to San Diego State University and the Museun? of Man.
Newly recorded site PAR-1 may be directly impacted by the channelization project as
currently planfied. Based on the surface indications of site content and integrity, PAR-1
should be tested prior to project approval in order to determine site importance as per
CEQA. The limited testing program recommended includes the excavation of Shovel Test
Pit's (STP's) north-south and east-west across the site area, the excavation of a maximum
of two 1 by 1 m test units and backhoe trenching to fully define site boundaries. Based on
the results of this testing, a determination of significance, impacts and mitigation of impacts
can be made.
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I' REFERENCES
Cheever, Dayle M. and Dennis Gallegos
1987 Archaeological and Paleontological Survey of a Portion of Palomar Airport Road. Unpublished manuscript on file with the City of Carlsbad Planning Department.
Gross, Tim and Mary Robbins-Wade
1987 Site record form for W-117.
King, Thomas F., Michael Moratto, and N. Nelson Leonard
1973 Recommended procedures for archaeological impact evaluation. University of California Archaeological Survey and Society of California Archaeology.
Rogers, Malcom
n.d. Site record form for W-117.
Scovill, Douglas, Harland J. Gordon, and Keith M. Henderson -
1972 Guidelines for the preparation of statements of environmental impact on archaeological resources. National Park Service. Tucson, Arizona.
R-1