HomeMy WebLinkAboutCDP 07-22; EL CAMINO REAL ROAD WIDENING; Coastal Development Permit (CDP)0 enas
CITY OF CARLSBAD
LAND USE REVIEW APPLICATION puki •
1)APPLICATIONS APPLIED FOR:(CHECK BOXES)
(FOR (FOR
DEPARTMENT DEPARTMENT
USE ONLY)USE ONLY)
Administrative Permit Planned Industrial Permit
Administrative Variance Planning Commission Determination
X Coastal Development Permit Neololt Precise Development Plan
Conditional Use Permit Redevelopment Permit
Condominium Permit Site Development Plan
Environmental Impact Assessment X Special Use Permit 3 21.4r010041--
General Plan Amendment Specific Plan
Tentative Parcel mapXHillside Development Permit
2 14i7r 01 Oa Obtain from Engineering Department
Local Coastal Program Amendment Tentative Tract Map
Master Plan r Variance
Minor Conditional Use Permit Zone Change
Non-Residential Planned Development je-List other applications not specified H A p 07_46
Planned Development Permit
2)ASSESSOR PARCEL NO(S).:NA
3) PROJECT NAME:El Camino Real Road Widening
4)BRIEF DESCRIPTION OF PROJECT:Bring El Camino Real Rd. to full-width prime arterial standards
between Tamarack Ave and Chestnut Ave.
5)OWNER NAME (Print or Type)6)APPLICANT NAME (Print or Type)
City of Carlsbad City of Carlsbad
MAILING ADDRESS MAILING ADDRESS
1635 Faraday Ave.1635 Faraday Ave.
CITY AND STATE ZIP TELEPHONE CITY AND STATE ZIP TELEPHONE
Carlsbad Ca.92008 Carlsbad Ca.92008 --/Lc.)--&--c 2 —2781
EMAIL ADDRESS:EMAIL ADDRESS:epiciia) 0166-Ar)cr.l.cc.
I CERTIFY THAT I AM T LEGAL OWNER AND THAT ALL THE ABOVE I CERTIFY THAT I AM THE LEGAL REPRESENTATIVE OF THE
INFO ATION IS E AND CORRECT TO THE BEST OF MY OWN --AND T ALL THE ABOVE INFORMATION IS TRUE AND
K W EDGE.CO'"CT TO E BES OF MY KNOWLEDGE.
DATE ATU DATE
7)BRIEF LEGAL DESCRIPTION
C.X:xel 1.0 rete._
NOTE:A PROPOSED PROJECT REQUIRING MULTIPLE APPLICATIONS BE FIL D, MUST BE SUBMITTED PRIOR TO 3:30 P.M.
A PROPOSED PROJECT REQUIRING ONLY ONE APPLICATION BE FILED, MUST BE SUBMITTED PRIOR TO 4:00 P.M.
Form 14 Rev.01/07 PAGE 1 OF 5
PEW1 041
8)LOCATION OF PROJECT:El Camino Real Road between Tamarack Ave and Chestnut Ave.
STREET ADDRESSTx:Mk Oi.?s OF-
2ON-T:14S Ci-otit(ec.
(NORTH, SOUTH, EAST, WEST)(NAME OF STREET)
BETWEEN R AK A -AND COC-STNUT AV E
(NAME OF STREET)(NAME OF STREET)
9)LOCAL FACILITIES MANAGEMENT ZONE I 2--
10)PROPOSED NUMBER OF LOTS NA 11) NUMBER OF EXISTING NA 12) PROPOSED NUMBER
RESIDENTIAL UNITS OF RESIDENTIAL UNITS NA
13)TYPE OF SUBDIVISION NA 14)PROPOSED IND OFFICE 15) PROPOSED COMMNASQUARE FOOTAGE SQUARE FOOTAGE NA
16)PERCENTAGE OF PROPOSED TBD NA17)PROPOSED INCREASE 18) PROPOSED SEWER NAPROJECTIN OPEN SPACE IN ADT USAGE IN EDU
19)GROSS SITE ACREAGE 20)EXISTING GENERAL a.21) PROPOSED GENERAL 0*15 itaAPLAN/14/4 PLAN DESIGNATION
101
22)EXISTING ZONING K-/23)PROPOSED ZONING 1<-24) HABITAT IMPACTS
IF YES, ASSIGN HMP #
25)IN THE PROCESS OF REVIEWING THIS APPLICATION IT MAY BE NECESSARY FOR MEMBERS OF CITY
STAFF,PLANNING COMMISSIONERS,DESIGN REVIEW BOARD MEMBERS OR CITY COUNCIL MEMBERS TO
INSPECT AND ENTER THE PROPERTY THAT IS THE SUBJECT OF THIS APPLICATION.I/WE CONSENT TO
ENTRY FOR THIS PURPOSE.
26)PROPERTY OWNER ACKNOWLEDGES AND CONSENTS TO A NOTICE OF RESTRICTION FILED ON THE
PROPERTY TITLE IF CONDITIONED FOR THE APPLICANT.CERTAIN APPROVALS (SUCH AS A CONDITIONAL USE
PERMIT)RUN WIT HE LAND AND BIND ANY SUCCESSORS IN INTEREST.
--4W
PROPERTY OWNER SIGNATURE
FOR CITY USE ONLY
FEE COMPUTATION
APPLICATION TYPE FEE REQUIRED KtULIVED
AUG 0 6 /.7
rk CITY OF CARLSBAD
DATE KARIAOAPERRICEIVED
RECEIVED BY:
TOTAL FEE REQUIRED 611QA r.)01 -
1.
Form 14 Rev.01/07 PAGE 2 OF 5
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Berryman & Henigar
1.0 GENERAL PROJECT BACKGROUND
The City of Carlsbad proposes to improve El Camino Real Road from Tamarack Avenue north
to Chestnut Avenue.El Camino Real Road is a major north/south roadway serving as a vital
parallel circulation element to 1-5 for the Cities of Encinitas,Carlsbad and Oceanside.As
development occurred,developers were required to widen El Camino Real to full-width prime
arterial Standards.This section of roadway is one of the few remaining sections of the El
Camino Real Road that has not been widened to its full-width of 6 travel lanes with 3
northbound and 3 southbound lanes.The roadway will be improved between approximately
STA 494±75 at the intersection with Tamarack Avenue to STA 540±00 at the intersection with
Chestnut Road. The improved roadway will have an improved width of 106' including 8-foot bike
lanes on both sides of the street,3 southbound lanes of 12'width each,an 18 foot wide
landscaped median island,and 3 northbound lanes of 12'width each between approximately
STA 494±75 and STA 507±50 at the southern end of the project and between approximately
STA 528±50 and STA 540±00.In the middle section of the roadway between approximately
STA 514±25 and STA 523±25,the roadway will transition between the previously discussed
typical section to a modified width of 96' including, an 8-foot bike lane on the west side of the
roadway, 3 southbound lanes of 11.5' width,a 14 foot wide median, and 3 northbound lanes of
11.5 foot width,a 5 foot bike lane on the east side of the roadway. Parkways consisting of a 5'
sidewalk and 5' of native vegetation will be provided on each side of the roadway resulting in a
right-of-way width of 116'in this reach of the roadway.
In order to improve the roadway to prime arterial Standards, the roadway will be widened both
to the west and the east. The traffic signals at the intersections of El Camino Real Road with
both Tamarack Avenue and Chestnut Avenue will be upgraded and improved to accommodate
the new roadway geometry. The feasibility of undergrounding overhead power lines will also be
considered as part of the project. Storm drains within the project footprint will be replaced and/or
improved as necessary.Storm water from the project currently outlets via storm drains into a
ditch east of the roadway. The project will mitigate these erosive velocities through placement of
erosion protection in the ditch.The existing pavement for the roadway will be overlaid with
asphalt concrete.The widened areas will receive a new structural section.Retaining walls will
be constructed in sections both east and west of the roadway where widening occurs. Retaining
wall design has been developed based on minimizing impacts to private property right of way
costs and aesthetics.Retaining walls will be cast-in-place or masonry with fascia for walls less
than 10 feet in height and tie-back for walls 10 feet in height or higher.Private property will be
acquired as necessary in order to complete improvements to the roadway.
Although the area of potential effect (APE) for the project includes a section of Chestnut Avenue
extending west of the intersection,no improvements are currently planned as part of this
project.It has been included in the APE in case minor revisions need to be made to the curb
returns. Acquisition of environmental clearance for this project should in no way be construed as
environmental clearance for significant improvements to the intersection of Chestnut Avenue
and El Camino Real Road.
El Camino Real Widening Improvement Project
City of Carlsbad —Alignment and Feasibility Study
6/30/2006
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2.0 PROJECT DESCRIPTION
El Camino Real is a major north/south circulation element serving as a vital parallel roadway to
Interstate 5.The roadway is designated as a scenic corridor and a prime arterial which consists
of the geometry depicted in Figure 1 at the end of this section.
The City desires to improve El Camino Real to the full width standards shown in Figure 1 from
Tamarack Avenue to Chestnut Avenue.The project is constrained by an existing drainage ditch
adjacent to the easterly edge of the roadway and steep (1:1 / vertical) terrain along the west
side.To accomplish the widening, the following guidelines / parameters adhered to:
Existing easterly curb,gutter and sidewalk to remain in place except approximately
1,000 feet south of Chestnut Avenue, where new pavement structural section, curb,
gutter and sidewalk are required to accommodate the widening.
Existing westerly curb,gutter and sidewalk to remain in place for approximately
1,900 feet north of Tamarack Avenue.
Minimize encroachment into the drainage ditch adjacent to the easterly road edge.
The scope of this project includes repair of the two (2)slope failure areas in the
channel and reduction of drainage discharge velocities to acceptable non-erosive
limits at proposed and existing storm drain outlet locations.Additional ditch
improvements will be considered under a future project.
Due to the steep terrain adjacent to the roadway and the goal to minimize grading
and right-of-way acquisition, the use of retaining walls, tie-back walls / soil nail walls
or combination thereof, were evaluated.
Alternative Analysis
During the course of monthly Project Development Team (PDT) meetings, various grading and
wall alternatives were analyzed,evaluated and refined which lead to the Preferred Project
outlined below.The following recaps the Alternative Analysis:
Grading Only
Due to significant impacts to private property and environmental habitat, grading only
alternatives with 2:1 slopes were disqualified as feasible alternatives and therefore
not carried further with additional refinements.The impacts included:
-slope heights in excess of 100 feet
-potential acquisition of entire parcels to accommodate the grading
-impact to environmental habitat areas
El Camino Real Widening Improvement Project
City of Carlsbad —Alignment and Feasibility Study
6/30/2006
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•Wall Only
The height and non-compatibility with the El Camino Real scenic corridor designation
and constructability /cost disqualified these alternatives for further consideration.
Impacts included:
-wall heights up to 20 feet
-limited ability to meander or screen wall with landscaping without significant
private property acquisition
-very esthetically unappealing
-potential cost of walls =$2,236,600 —Alt. #7
•Combination Grading and Tiered Walls
Appendix A contains several variations of these alternatives and range from grading
with a single wall to grading with 2 or 3 tiered walls.A synopsis of impacts includes:
-Achieving a balance between grading, tiered walls, and aesthetics is challenging
but achievable
-Construction of tiered walls may be problematic and cost prohibitive.Further
analysis is recommended before proceeding with Final Design.
-Height of each tiered wall was limited to 10 feet with a minimum horizontal
separation of 5 feet.
•Comparative Cost Analysis
Preliminary Comparative Cost Estimates were prepared for the focused areas where
the only difference in alternatives were the grading / wall scenarios and therefore
cost estimates for the entire length of the project were not performed.Preliminary
comparative cost estimates for the alternatives considered are included in Appendix
B.The range of comparable costs are:
Sprague area:Czajkowski Area:
-Alternative #4 =$33,579 -Alternative #8 =$504,645
-Alternative #3 =$1,493,979 -Alternative #6 =$2,689,578
Preferred Project
To optimize the balance between improving El Camino Real to a prime arterial,providing an
aesthetic scenic corridor, and minimizing private property impacts and right-of-way acquisition, it
was decided that a 'modified' prime arterial section should be analyzed.Figure 1 illustrates the
approved typical section to be used for the Modified Prime Arterial.
Note:This section will be constructed from approximately STA 514±25 to STA 523±25.The
standard prime arterial section,Figure 1,will be constructed for the remaining portion of the
roadway, with the exception of appropriate transition areas between the two alternatives.
El Camino Real Widening Improvement Project
City of Carlsbad —Alignment and Feasibility Study
6/30/2006
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Other criteria for the Preferred Project include:•Single wall ranging in height from 2' to 15' along the west side from STA 513±50 to
STA 526±50.
The above wall will meander where possible and be constructed of cast-in-place or
masonry with facial treatment for heights less than 10 feet and a sculptured tie-back
wall for heights over 10 feet.
11/2 :1 cut slopes will be constructed along the Sprague property (APN's 126-230-24
& 126-230-25)•2" pavement overlay on existing pavement•6" AC 18" AB without the use of tensor or glass grid
El Camino Real Widening Improvement Project
City of Carlsbad —Alignment and Feasibility Study
6/30/2006
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C Roe C t of Carlsbad
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cate Planning Department
DISCLOSURE STATEMENT
Applicant's statement or disclosure of certain ownership interests on all applications which will require
discretionary action on the part of the City Council or any appointed Board, Commission or Committee.
The following information MUST be disclosed at the time of application submittal.Your project cannot be
reviewed until this information is completed. Please print.
Note:--
Person is defined as "Any individual, firm, co-partnership, joint venture, association, social club, fraternal organization,
corporation, estate, trust, receiver, syndicate, in this and any other county, city and county, city municipality, district or
other political subdivision or any other group or combination acting as a unit."
Agents may sign this document;however, the legal name and entity of the applicant and property owner must be
provided below.
1.APPLICANT (Not the applicant's agent)
Provide the COMPLETE, LEGAL names and addresses of ALL persons having a financial interest
in the application.If the applicant includes a corporation or partnership,include the names,title,
addresses of all individuals owning more than 10% of the shares. IF NO INDIVIDUALS OWN MORE
THAN 10%OF THE SHARES,PLEASE INDICATE NON-APPLICABLE (N/A)IN THE SPACE
BELOW.If a publicly-owned corporation,. include the names, titles, and addresses of the corporate
officers.(A separate page may be attached if necessary.)
Person Corp/Part
Title Title
Address Address
2.OWNER (Not the owner's agent)
Provide the COMPLETE,LEGAL names and addresses of ALL persons having any ownership
interest in the property involved. Also,provide the nature of the legal ownership (Le, partnership,
tenants in common,non-profit,corporation,etc.).If the ownership includes a corporation or
partnership,include the names,title,addresses of all individuals owning more than 10%of the
shares.IF NO INDIVIDUALS OWN MORE THAN 10%OF THE SHARES,PLEASE INDICATE
NON-APPLICABLE (N/A)IN THE SPACE BELOW.If a publicly-owned corporation,include the
names,titles,and addresses of the corporate officers.(A separate page may be attached if
necessary.)
Person
-
1/1.4 fimzER Corp/Part
Title SR .eni&/.06-6e Title
Address &35 P9RA /9t&Address
610-geygto CA 9a00
1635 Faraday Avenue • Carlsbad, CA 92008-7314 • (760) 6024600 •FAX (760) 602.8559 •www.ci.carlsbad.ca.us
3.NON-PROFIT ORGANIZATION OR TRUST
If any person identified pursuant to (1) or above is a nonprofit organization or a trust,list the
names and addresses of ANY per n serving as an officer or director of the non-profit
organization or as trustee or benefi •ry of the.
Non Profit/Trust Non Profit/Trust
Title Title
Address Address
(
4.Have you had more than $500 worth of business transacted with any member of City staff,
Boards, Commissions, Committees and/or Council within the past twelve (12) months?
Yes 1K No If yes, please indicate person(s):
NOTE:Attach additional sheets if necessary.
I certify that all the above information is true and correct to the best of my knowledge.
X30 J'3007
Signature of owner/d e Signature of applicant/date
'VA PLAJzF_./.2 OVA PaJzeig
Print or type name of owner Print or type name of applicant
Signature of owner/applicant's agent if applicable/date
Print or type name of owner/applicant's agent
1-1:ADMIN\COUNTERIDISCLOSURE STATEMENT 12/06 Page 2 of 2
‘j 41C,J.3.
17.CitN"--of Carlsbad
e4„„otor Planning Department '
HAZARDOUS WASTE AND SUBSTANCES STATEMENT
.•
Consultation Of List's of Sites Related To Hazardous Wastes
(Certification of Compliance with Government Code Section 65962.5)
Pursuant to State of California Government Code Section 65962.5,I have consulted the
Hazardous Wastes and Substances Sites List compiled by the California Environmental
Protection Agency and hereby certify that (check one):
El The development project and any alternatives proposed in this application are not
contained on the lists compiled pursuant to Section 65962.5 of the State Government
Code.
•
The development project and any alternatives proposed in this application are contained
on the lists compiled pursuant to Section 65962.5 of the State Government Code.
•
APPLICANT PROPERTY OWNER •
City of CarlsbadName:Name:City of Carlsbad
Address:
-1635 Faraday Ave Address:1635 Farday Ave
Carlsbad,CA 92008 Carlsbad,CA 92008
Phone Number:Phone Number:
Address of Site:El Camino Real Road From Tamarak Ave to Chestnut Ave
Local Agency (City and County):City of Carlsbad -County of San Diego
Assessor's book, page, and parcel number:n /a
Specify list(s):n /a
Regulatory Identification Number:n/a
Date of List:n /a
590/09 cP/8 e/e)
Applicant SignatukCte Property Owner Signature/Date
Admin/Counter/HazWaste
1635 Faraday Avenue • Carlsbad, CA 92006.7314 • (760) 602.4600 • FAX (760) 602-8559 • www.ci.carlabad.ca.us ®-
o C A #?‘
sig.Rm.W4TpR.RECIPIREMENT$.APPLICABILIIXCHECKLIST t ••
4C.IF00
Project Address Assessors Parcel Number(s):Project # (city use only):
El Camino Real Rd. from Tamarak Ave.to Chestnut Ave.C.D P a1 -zz_ScAP d7 -c.3.4/
1.1 DP 01 -o 7_
Complete Sections 1 and 2 of the following checklist to determine your project's permanent and
construction storm water best management practices requirements.This form must be completed
and submitted with your permit application.
Section 1.Permanent Storm Water BMP Requirements:
If any answers to Part A are answered "Yes,"your project is subject to the "Priority Project
Permanent Storm Water BMP Requirements,"and "Standard Permanent Storm Water BMP
Requirements"in Section III,"Permanent Storm Water BMP Selection Procedure" in the Storm
Water Standards manual.
If all answers to Part A are "No," and any answers to Part B are "Yes," your project is only subject
to the "Standard Permanent Storm Water BMP Requirements".If every question in Part A and B
is answered "No," your project is exempt from permanent storm water requirements.
Part A: Determine Priority Project Permanent Storm Water BMP Requirements.
Does the project meet the definition of one or more of the priority project categories?*Yes No
1.Detached residential development of 10 or more units.
2.Attached residential development of 10 or more units.
3.Commercial development greater than 100,000 square feet.
4. Automotive repair shop.ri
5.Restaurant.
6.Steep hillside development greater than 5,000 square feet.
7.Project discharging to receiving waters within Environmentally Sensitive Areas.
2
8.Parking lots greater than or equal to 5,000 ft or with at least 15 parking spaces, and
potentially exposed to urban runoff.
9.Streets, roads, highways, and freeways which would create a new paved surface that is 75,000 square feet or greater
*Refer to the definitions section in the Storm Water Standards for expanded definitions of the
priority project categories.
Limited Exclusion: Trenching and resurfacing work associated with utility projects are not
considered priority projects.Parking lots, buildings and other structures associated with utility
projects are priority projects if one or more of the criteria in Part A is met.If all answers to Part A
are "No", continue to Part B.
Part B: Determine Standard Permanent Storm Water Requirements.
Does the project propose:Yes No
1.New impervious areas, such as rooftops, roads, parking lots, driveways, paths and
sidewalks?ri
2.New pervious landscape areas and irrigation systems?
3.Permanent structures within 100 feet of any natural water body?
4. Trash storage areas?
5.Liquid or solid material loading and unloading areas?
6.Vehicle or equipment fueling, washing, or maintenance areas?ri I7 1
7. Require a General NPDES Permit for Storm Water Discharges Associated with Industrial nActivities (Except construction)?*
8. Commercial or industrial waste handling or storage, excluding typical office or household ri /-
waste?
9.Any grading or ground disturbance during construction?11(
10. Any new storm drains, or alteration to existing storm drains?
*To find out if your project is required to obtain an individual General NPDES Permit for Storm Water
Discharges Associated with Industrial Activities, visit the State Water Resources Control Board web site
at, www.swrcb.ca.gov/stormwtr/industrial.html
Section 2.Construction Storm Water BMP Requirements:
If the answer to question 1 of Part C is answered "Yes," your project is subject to Section IV,"Construction
Storm Water BMP Performance Standards," and must prepare a Storm Water Pollution Prevention Plan
(SWPPP).If the answer to question 1 is "No," but the answer to any of the remaining questions is "Yes,"
your project is subject to Section IV,"Construction Storm Water BMP Performance Standards," and must
prepare a Water Pollution Control Plan (WPCP). If every question in Part C is answered "No," your project
is exempt from any construction storm water BMP requirements.If any of the answers to the questions in
Part C are "Yes," complete the construction site prioritization in Part D,below.
Part C:Determine Construction Phase Storm Water Requirements.
Would the project meet any of these criteria during construction?Yes No
1.Is the project subject to California's statewide General NPDES Permit for Storm Water
Discharges Associated With Construction Activities?
2.Does the project propose grading or soil disturbance?
3. Would storm water or urban runoff have the potential to contact any portion of the
construction area, including washing and staging areas?
4. Would the project use any construction materials that could negatively affect water quality 7if discharged from the site (such as, paints, solvents, concrete, and stucco)?
Part D:Determine Construction Site Priority
In accordance with the Municipal Permit,each construction site with construction storm water BMP
requirements must be designated with a priority:high,medium or low.This prioritization must be
completed with this form, noted on the plans, and included in the SWPPP or WPCP.Indicate the project's
priority in one of the check boxes using the criteria below, and existing and surrounding conditions of the
project,the type of activities necessary to complete the construction and any other extenuating
circumstances that may pose a threat to water quality. The City reserves the right to adjust the priority of
the projects both before and during construction.[Note:The construction priority does NOT change
construction BMP requirements that apply to projects;all construction BMP requirements must be
identified on a case-by-case basis. The construction priority does affect the frequency of inspections that
will be conducted by City staff.See Section IV.1 for more details on construction BMP requirements.]
7 A)High Priority
1)Projects where the site is 50 acres or more and grading will occur during the rainy season
2)Projects 1 acre or more.
3)Projects 1 acre or more within or directly adjacent to or discharging directly to a coastal lagoon or
other receiving water within an environmentally sensitive area
4)Projects, active or inactive, adjacent or tributary to sensitive water bodies
B)Medium Priority
5)Capital Improvement Projects where grading occurs,however a Storm Water Pollution Prevention
Plan (SWPPP) is not required under the State General Construction Permit (i.e., water and sewer
replacement projects, intersection and street re-alignments, widening, comfort stations, etc.)
6)Permit projects in the public right-of-way where grading occurs,such as installation of sidewalk,
substantial retaining walls, curb and gutter for an entire street frontage, etc.,however SWPPPs are
not required.
7)Permit projects on private property where grading permits are required, however, Notice Of Intents
(NO1s) and SWPPPs are not required.
C)Low Priority
8)Capital Projects where minimal to no grading occurs,such as signal light and loop installations,
street light installations, etc.
9)Permit projects in the public right-of-way where minimal to no grading occurs, such as pedestrian
ramps, driveway additions, small retaining walls, etc.
10) Permit projects on private property where grading permits are not required, such as small retaining
walls, single-family homes, small tenant improvements, etc.
Owner/Agent/Engineer Name (Please Print):Title:
City of Carlsbad .54 OUR.ri()0/ocie<
Signature:/-)Date:
gl3 0/67
El Camino Real
Preliminary Hydrology/Hydraulics Study
This roadway project consists ofwidening El Camino Real to 6 travel lanes (3
northbound/3 southbound-106' improved width with 125' right-of-way width), 8' foot
bike lanes on both sides of the street,18 foot wide landscaped median island and 10 foot
wide parkways on both sides of the street consisting of 5' sidewalk and 5'ofnative
vegetation.The limits of this project are between Tamarack Ave and Chestnut Ave.
The existing conditions of the road consist of erosion ofthe embankment on the east side
of El Camino Real, alligator cracking, bumps/sags and weathering of the pavement.
Some issues that need to be addressed are:
•Rip Rap placement in the ditch at the storm drain outlet locations.
•Whether or not should be inserts be installed at the street curb inlets or an
alternate water quality BMP should be employed.
•Maximum desired inlet length.
Using the topographic mapping provided by the City of Carlsbad, we have performed a
hydrology study ofthe drainage basins tributary to the project.The flowrates, curb inlets,
storm drain outlets and the velocity along the channel located on the east side of El
Camino Real are shown on the drainage map (see exhibit 4).The curb inlet locations,
sizes, flowrates and depth entering the inlets are summarized in the table below.Under
the direction ofthe City of Carlsbad,a 15' maximum length curb inlet will be allowed.If
a curb inlet length greater than 15' is required, double inlets will be used.
Curb inlet data:
Station Node Inlet sizes Flowrate Depth
(req'd)(cfs)(ft)
532+20 103 15'&10'8.0 0.35
532+20 423 15'& 5'6.1 0.32
526+00 424 17'5.0 0.26
526+00 434 17'5.0 0.27
517+50 108 15'& 7'6.8 0.29
517+50 445 16'&11'9.3 0.37
512+00 561 15'&16'7.4 0.33
512+00 563 17'5.0 0.27
507+00 572 15'&16'9.8 0.36
507+00 572.5 12'3.7 0.26
500+00 573 17'&19'12.4 0.41
498+50 593 15'& 7'6.8 0.31
Based on the results of the preliminary AES analysis, it appears that the majority ofthe
existing storm drain systems within the project limits are at capacity.Line D and F may
be under-sized.The size and locations of the existing and proposed storm drain are
summarized in the table below.The letter designations are depicted on exhibit 4 for
reference.
1
Line Station Current Proposed size Exit Velocity Proposed Energy
size Into the channel Dissipator
A 532+20 n/a 24" RCP n/a n/a
B 526+20 to n/a 24" RCP n/a n/a
532+00
C 529+20 n/a 18" RCP n/a n/a
D 526+00 24"30" RCP V=17 fps 1 ton rip rap
E 517+50 24"24" RCP V=34 fps Concrete energy
dissipater
F 512+00 24"24" RCP V=33 fps Concrete energy
dissipater
G 507+00 18"18" RCP V=13 fps 1/2 ton rip rap
H 498+50 to n/a 18" RCP V=24 fps Concrete energy
500 dissipater
I 532+20 24"36" RCP V=26 fps Concrete energy
dissipater
Brow ditches have been proposed on the west side of El Camino Real to prevent hillside
storm water from flowing over the sidewalk and onto the street.The proposed brow ditch
locations are from station 513+50 to station 536+00.The sizes of the brow ditches vary
from 12" minimum depth to about 24" in depth and are shown on the drainage map (see
exhibit 4).
Performing a detailed hydraulic analysis is beyond the scope ofservice.It should be
noted that the AES software used to determine the velocities and pipe capacities is a
simplistic model and provides only a rough estimate.The pipe sizes and velocities are
subject to revision.The actual pipe size will be determined during Phase II of this project
when a detailed hydraulics analysis is performed.
Optional services:
The channel erosion on the east side of El Camino Real may need to be addressed.
The velocities predicted in the channel on the east side of El Camino Real range between
6 and 9 fps. Velocities in excess of 6 fps are considered erosive.
If you have any questions, please me a call at (858) 451 -6100.
Hoang Nguyen, PE &Sharon Humphreys, PE
Bureau Veritas/Berryman &Henigar
11590 West Bernardo Ct, Suite 100
San Diego, Ca 92127
2
EARLY ASSESSMENT APPLICATION
DATE:NO.:EA OD. 0 .5
-•
(Submittal Date to Planning)(Planning Department Tracking Number)
TO:PLANNING DEPARTMENT -SPECIAL PROJECTS DIVISION
VIA:6.(//')id AP
-4;
(Requesting Department Head Signature)
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(Requesting Department Contact)
What is the project title?EL 1
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Is the project part of an approved or future CIP budget?rip 3 qs -
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List previous, and anticipated future, related City Council actions.
List any previously certified environmental documents (i.e. EIRs, Negative Declarations).
What technical studies have been, or will be,prepared (i.e. biology, archeology, traffic, noise, etc.)?
Is the project on City property? If not, has property owner authorization or an easement been secured?
Identify the project schedule.List critical,and desired milestone,dates in the development review and
construction process (i.e.hearing dates,grant application submittal deadlines,public workshops,
construction phasing, etc.).
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Identify the project location.Describe the project.Provide as much detail as possible, attach additional
sheets if necessary.Be sure to identify,if applicable,the public art component,estimated quantities of
import/export, construction staging areas on and offsite, areas of sensitive vegetation, unique construction
technologies, proposed facility technologies and byproducts. If preliminary or conceptual plans/exhibits are
available, please include with this transmittal.
PLANNING DEPARTMENT RESPONSE
Permits Required:
CEQA Overview:
Other comments:
DATE:FROM:
(Returned to Requesting Department)Project Planner
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