HomeMy WebLinkAbout; Calavera Hills/College Blvd & Cannon RD Plan; Calavera Hills/College Blvd & Cannon RD Plan; 2002-03-21CALAVERA HILLS / COLLEGE BLVD. AND CANNON RD.
PRE-CONSTRUCTION OPERATIONS PLAN
For Submittal to the U.S. Army Corps of Engineers
Prepared/or:
CITY OF CARLSBAD
1635 Faraday Ave.
Carlsbad, CA 92008
CALAVERA HILLS n, LLC
2727 Hoover Ave.
National City, CA 91950
Prepared by:
PLANNING SYSTEMS
1530 Faraday Ave.
Carlsbad, CA 92008
3/21/02
CALAVERA HILLS / COLLEGE BLVD. & CANNON ROAD
PRE-CONSTRUCTION OPERATIONS PLAN
Outline of Report
A. Background (Pg. 2)
B. Proposed construction timeline and sequencing (Pg. 4)
C. Preconstruction surveys defining project boundaries with respect to
avoidance of "waters" and cultural resources (Pg. 5)
D. Site plans delineating boundaries for staging, fueling and storage areas.
Not within 100 ft. of "waters" (Pg. 5,6)
E. Measures to be taken to prevent an unpermitted discharge of fill into
"waters". Silt net, hay bales, and BMP's, including emergency spill kits.
(Pg. 5-14)
F. Photos documenting site conditions, including work limits and resource
exclusion areas. Photos showing roped construction areas. (Pg. 14-16)
G. Demonstration that a Corps-approved biologist has been hired to monitor
and inspect on-site activities; including name, etc., credentials, etc. Biologist
shall oversee: (Pg. 17)
1. Grading and site plans
2. Installation of rope to demarcate construction areas
3. All grading
4. Avoidance of open space
5. Be empowered to halt construction when non-compliance occurs
6. Implement and monitor the mitigation measures
H. Demonstration that a Corps-approved cultural resource specialist has been
hired to monitor activities by cultural sites. No work to be performed
within 100 ft. of cultural sites. Cultural resource specialist shall: (Pg. 18)
1. Be empowered to halt construction if terms of 404 permit are violated
2. Implement and monitor the mitigation program, if warranted.
Cala. CO Plan
A. BACKGROUND
Calavera Hills n LLC and the City of Carlsbad have received entitlement
approvals to construct a two-phased project, consisting of the development of 781
residential units, local infrastructure and community facilities, the extension of two
existing arterial roadways, (College Boulevard and Cannon Road), and two
detention basins. The first phase involves development of the residential units,
and College Boulevard Reaches B and C (would be extended from Carlsbad
Village Drive southerly to the planned intersection with Cannon Road, Cannon
Road Reach 3 (which would be extended from this intersection to El Camino Real)
and Detention Basin BJB. Phase 2 would involve future development of College
Blvd. Reach A and Detention Basin BJ. The proposed residential development,
roads, and detention basin project(s) all lie within the northeast portion of the City
of Carlsbad, San Diego County, California.
More specifically, the project consists of the following development and public
infrastructure components:
a. The construction of the Calavera Hills Phase n project, which
consists of a maximum of 781 units of residential housing, local
infrastructure and their associated neighborhood improvements, and
community facilities and open space, over approximately 300 total
acres. The development will occur within the seven remaining
undeveloped "villages" which constitutes the final phase of the
Calavera Hills Master Planned Community.
b. The construction, in phases discussed above, of College Boulevard,
between the existing stub at Carlsbad Village Dr. to the opposite stub
near El Camino Real, and Cannon Road from El Camino Real to the
proposed College/Cannon intersection.
c. The installation, in phases, of two detention basins, identified as
Basins BJ and BJB, to control flood waters along Little Encinas Creek
and Calavera Creek upstream of the Rancho Carlsbad Mobile Home
Park.
Construction activities on Calavera Hills Phase n and College Blvd. and Cannon
Road, and the Desiltation Basins will be covered under the NPDES General Permit
Cala. CO Plan
for Storm Water Discharges Associated with Construction Activity (Order No. 99-
08-DWQ). This permit is issued and administered by the State of California Water
Resources Control Board (RWQCB). The General Permit specifies certain
requirements, such as the preparation of a SWPPP, implementation of BMPs, and
storm water monitoring. A Waste Discharge permit (WD) was issued by the
RWQCB for the project on Feb. 13,2002, Order No. R9-2002-0014.
The proposed project area drains into three creeks tributary to Agua Hedionda
Lagoon. These creeks are Calavera Creek, Agua Hedionda Creek and Little
Encinas Creek. The Agua Hedionda Lagoon, located downstream from the subject
site has been identified by the RWQCB on the 303(d) Listed Water Bodies as
impaired for sedimentation, siltation, and fecal coliform. As such, the proposed
project has included BMPs that address water quality compliance, as well as public
concerns. In light of the designation as a 303(d) Listed Water Body, the April 26,
2001, modifications to the General Permit require monitoring of storm water
discharges for sedimentation/siltation, as well as the monitoring of non-visible
pollutants.
The RWQCB issued Order No. 2001-01, which outlines storm water discharge
requirements for municipalities in San Diego County, including the City of
Carlsbad. The City of Carlsbad has set forth requirements for controls to reduce
the pollutants in storm water discharge. These requirements are applicable to the
Calavera Hills/College and Cannon project. They address littering; parking lots,
and similar structures; illicit discharges and illegal connections; implementation of
BMPs; compliance with general permits; and watercourse protection.
A Section 7 Consultation Biological Opinion was issued by the US Fish & Wildlife
Service for the project on March 14,2002. The US Army Corps of Engineers issued
a Section 404 Permit on March , 2002. This Pre-Construction Operations Plan is
intended to implement and be consistent with the requirements of these permits.
Cala. CO Plan
B. PROPOSED CONSTRUCTION TIMELINE AND SEQUENCING
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Activity Name
College/Cannon Intersection
Environmental Fencing
Install Sediment Controls
Equipment Mobilization
Final Biological Inspection
Harvest Trees - Clear Veg.
Remainder of Project - Ph 1*
Environmental Fencing
Install Sediment Controls
Equipment Mobilization
Clear Vegetation
Mass Grading
Utility Installation
Landscaping Installation
Wetlands Mitigation
Grading of Mitigation Site BJB
Installation of Mitigation BJB
Remainder of Project - Ph 2**
Environmental Fencing
Install Sediment Controls
Equipment Mobilization
Clear Vegetation
Mass Grading
Utility Installation
Landscaping Installation
Wetlands Mitigation
Grading of Mitigation Site BJB
Installation of Mitigation BJB
Start
Date
3/15/02
3/18/02
3/21/02
3/25/02
3/26/02
8/1/02
8/6/02
8/13/02
8/15/02
8/23/02
11/1/02
2/1/03
9/15/02
9/30/02
9/1/03
9/6/03
9/12/03
9/16/03
9/24/03
12/17/03
4/14/04
10/1/03
10/15/03
Finish
Date
3/21/02
3/22/02
3/27/02
8/7/02
8/12/02
8/15/02
8/23/02
11/15/02
2/28/03
4/1/03
9/30/02
12/1/02
9/5/03
9/12/03
9/16/03
9/24/03
12/17/03
4/14/04
6/10/04
10/15/03
12/16/03
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* - Calavera Hills Phase II residential development, College Blvd.
Reaches B and C, Cannon Road Reach 3 and Detention Basin BJB.
** - College Blvd. Reach A and Detention Basin BJ
Cala. CO Plan
C. PRECONSTRUCTION SURVEYS DEFINING PROJECT BOUNDARIES
WITH RESPECT TO AVOIDANCE OF "WATERS" AND CULTURAL
RESOURCES
These surveys are on file with the Army Corps of Engineers.
D. SITE PLANS DELINEATING BOUNDARIES FOR STAGING, FUELING
AND STORAGE AREAS. NOT WITHIN 100 FT. OF "WATERS"
Attached Exhibit A delineates the approximate locations for staging, fueling and
storage areas. None of the proposed construction staging, fueling and storage
areas are located within 100 ft. of any identified "waters" of the U.S.
E. MEASURES TO BE TAKEN TO PREVENT AN UNPERMITTED
DISCHARGE OF FILL INTO "WATERS". SILT NET, HAY BALES, AND
BMP'S, INCLUDING EMERGENCY SPILL KITS.
The following measures will be taken to prevent an unpermitted discharge of fill
into "waters" of the U.S.
Environmental fencing. The first step associated with the pre-construction
operation is the installation of the environmental fence. This fence line delineates
the limits of grading authorized in the permits. Oversight of the installation of this
fence will be conducted by an authorized biologist, familiar with the approved
Calavera Hills/BTD #4 Section 404, Section 7, and City permits. The entire
environmental limit will be defined by environmental fencing and an educational
session with grading machinery operators will be conducted by the biologist, all
prior to commencement of the clearing operations. The environmental fence line
will be well established and properly maintained throughout the duration of the
grading operation.
1. Conduct contractor training session with machinery operators.
2. Install environmental fencing to delineate limits of authorized
grading.
Clearing and grubbing BMP's. BMPs that will be utilized during the clearing and
grubbing phase of project development are included in the SWPPP prepared in
accordance with the NPDES General Permit for Storm Water Discharges
Associated with Construction Activity (WDID 9375317517). The areas to be
cleared and grubbed will be limited to those areas The types of erosion and
Cala. CO Plan
- Manufactured Slopes
- Staging Fueling and Storage Areas
•-Waters of the U.S.
Exhibit A
STAGING, FUELING AND STORAGE AREA EXHIBIT
Calavera Hills Phase II / College Blvd. and Cannon Rd.
3MM0102 MAR 2002
NORTH
sediment controls that will be implemented for the clearing and grubbing of the
site are listed below. It is the intent of these requirements that all storm water will
pass through the de-sedimentation process prior to exiting the site.
1. ' Install perimeter sediment controls, including silt fencing in all
downhill perimeter areas where sediment could travel, and install
temporary sediment control basins with skimmer outlets within area
to be graded.
2. Review existing permanent sediment control basins for proper
functioning, provide maintenance of any dysfunctional aspects of
these basins, including stabilization of outlets.
3. Install sand or gravel-bag barriers and other flow diversions to route
storm waters to basins.
4. Provide temporary drainage inlet protection.
5. Install temporary check dams to reduce storm water velocity.
6. Install controls to address tracking of sediment off site, including
stabilized construction entrances (with wheel-wash facilities as
needed)
Commencement of wetlands revegetation: The revegetation of 10.7 acres of
wetlands will occur within the proposed Detention Basins BJ and BJB. As shown
on the attached schedule, the mitigation program will be provided in two phases
consistent with the impacts. This revegetation program will be installed consistent
with the Habitat Restoration and Monitoring Plan for the City of Carlsbad Bridge
and Thoroughfare District, the Calavera Hills Project, and the Detention Basins
Project in Carlsbad, California, dated January 10,2002.
Mass grading setup/soil surcharge. The second phase of construction at the site
will include excavating existing alluvium deposits and establishing a surcharge
over some areas of the site from onsite soils. The resulting surcharge load will
remain undisturbed in certain isolated areas, for approximately six months.
Temporary sedimentation control basins and the permanent basins will be in
continuous operation throughout the Pre-mass grading phase, allowing all storm
water to pass through the de-sedimentation process as the project progresses. The
areas affected by this phase of grading are shown on Exhibit B.
Storm drain installation. Storm drains will be installed during this phase of
construction and will be incorporated into the storm water runoff and sediment
program.
Cola. CO Plan
Pre-mass grading BMP's. Additionally, during the Pre-mass grading phase, the
following controls will be implemented:
1. Inspection and maintenance of all erosion control measures will be
implemented at all times.
2. Runoff will be directed away from disturbed areas during the Pre-
mass grading phase to the degree feasible.
3. Runoff velocities will be kept low through surface roughening.
4. Surcharge areas - Surcharge slopes and surfaces will be stabilized
with an effective application of blown straw mulch with tackifier or
bonded fiber matrix or other approved method.
5. Controls to address tracking of sediment off site, including stabilized
construction entrances (with wheel-wash facilities as needed) will be
implemented.
5. A regular, daily program for sweeping of public rights-of-way will
be enacted to avoid tracking sediment off site.
6. Watering and other dust controls will be performed.
7. All disturbed areas not being graded will be stabilized with a
hydraulic application of temporary soil stabilizer to protect the soils
from eroding. The soil stabilizer will consist of guar,
polyacrylamide, or acrylic co-polymer with mulch or other approved
method.
8. Disturbed areas of the site that will not be re-disturbed for 21 days or
more will be stabilized by the 14th day after the last disturbance.
Wetlands revegetation. During this period, completion of the excavation to the
required elevation, installation of irrigation, and planting of the wetlands
revegetation operation will take place.
The third phase of construction will include the bulk of earthwork activities, and
portions of this phase will be performed concurrently with the Pre-mass grading
construction. Special care will be exercised during the surcharge removal to
identify and implement BMPs to minimize the effects of mass grading.
Mass grading BMP's. The areas to be mass graded are shown on Exhibit C. The
types of erosion and sediment controls that will be implemented for the mass
grading of the site are listed below.
1. Mass grading operations will be timed to minimize soil exposure.
2. Vegetation and mulch or otherwise stabilization of graded areas will
occur as soon as grading of the particular area is completed.
Cala. CO Plan
3. Minimize the length and steepness of slopes.
4. Conduct regular sweeping of access streets and rights of way to
minimize transport of sediment.
5. Install temporary checkdams to maintain control over stormwater
velocity in appropriate areas.
6. Watering and other dust controls will be performed.
7. All disturbed areas not being graded will be stabilized with a
hydraulic application of temporary soil stabilizer to protect the soils
from eroding. The soil stabilizer will consist of guar,
polyacrylamide, or acrylic co-polymer with mulch or other approved
method.
8. Disturbed areas of the site that will not be re-disturbed for 21 days or
more will be stabilized by the 14th day after the last disturbance.
9. Areas to be permanently stabilized will be hydroseeded and/or
planted in accordance with the project landscape plans. In addition
to seeds and plants, slopes that are 3:1 or flatter will be roughened
and mulched (with tackifier as specified). Slopes steeper than 3:1 but
flatter than 2:1 will be roughened and protected with blown straw
mulch with tackifier. Slopes 2:1 or steeper will be protected with
bonded fiber matrix or erosion control blankets.
Cala. CO Plan
•H - Manufactured Slopes
Q - Temporary Desiltation Basins
«——- Environmental Fence
• • • • - Silt Fence
•»-^ - Direction of Drainage
Exhibit B
PRE-MASS GRADING SITE PREPARATION EXHIBIT
Calavera Hills Phase II / College Blvd. and Cannon Rd.
#MM0102
NORTH
- Manufactured Slopes
- Temporary Desiltation Basins
- Environmental Fence
- Permanent Detention
Or Depollutant Basins
Exhibit C
MASS GRADING EXHIBIT #MM0102
Calavera Hills Phase II / College Blvd. and Cannon Rd.NORTH
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Wetlands revegetation. During this period, the planting and beginning of the
maintenance, monitoring and reporting period for the wetlands revegetation will
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occur.
Monitoring. In compliance with the requirements of the General Permit, site
inspections will be performed before, during (for storms 24 hours or longer), and
after storms. BMPs will be maintained, repaired, or replaced as needed, and
records will be kept of all inspections and responses.
Additionally, as required by the April 2001 modifications to the General Permit, a
sampling and analysis strategy and sampling schedule will be developed for the
project as follows:
1. Wetlands revegetation. Monitoring and maintenance of the
wetlands revegetation will occur regularly, consistent with the
monitoring and maintenance requirements identified in the Final
Wetland Mitigation Plan.
2. Siltation monitoring. Siltation monitoring will occur continuously
during the grading operation through samples collected in the
receiving water upstream and downstream of the site:
a. During the first two hours of discharge from rain events that
result in runoff to the water body
b. For storms that occur during daylight hours, seven days per
week
c. For four storms per month
d. Samples will be analyzed according to test procedures under
40CFR, Part 136 for settleable solids and total suspended
solids.
2. Samples will be taken should visual monitoring indicate that there
has been a breach, malfunction, leakage, or spill from a BMP that
could result in the discharge of pollutants in storm water that would
not be visually detectable, or if storm water comes in contact with
soil amendments or other exposed materials (such as historic site
contamination) and is allowed to be discharged. Samples will be
taken upstream and downstream of the pollutant source:
Cala. CO Plan 12
- Wetland Revegetation Areas
I Exhibit D'WETLANDS REVEGITATION AREAS EXHIBIT
, Calavera Hills Phase II / College Blvd. and Cannon Rd.
#MM0102
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a. During the first two hours of runoff
b. For storms that occur during daylight hours, seven days per
week
c. Samples will be analyzed according to test procedures under
40CFR, Part 136 for the constituencies of concern.
3. The results of filed and laboratory sampling and analysis will be
evaluated, BMPs will be repaired or replaced, or alternative BMPs
will be implemented as necessary. All field and/or analytical data
will be kept with the SWPPP until the final notice of termination
(NOT) has been submitted and approved.
F. PHOTOS DOCUMENTING SITE CONDITIONS, INCLUDING WORK
LIMITS AND RESOURCE EXCLUSION AREAS. PHOTOS SHOWING
ROPED CONSTRUCTION AREAS.
Cala.COPlan 14
S8
G. DEMONSTRATION THAT A CORPS-APPROVED BIOLOGIST HAS
BEEN HIRED TO MONITOR AND INSPECT ON-SITE ACTIVITIES;
INCLUDING NAME, ETC., CREDENTIALS, ETC. BIOLOGIST SHALL
OVERSEE:
1. GRADING AND SITE PLANS
2. INSTALLATION OF ROPE TO DEMARCATE CONSTRUCTION
AREAS
3. ALL GRADING
4. AVOIDANCE OF OPEN SPACE
5. BE EMPOWERED TO HALT CONSTRUCTION WHEN NON-
COMPLIANCE OCCURS
6. IMPLEMENT AND MONITOR THE MITIGATION MEASURES
The biologist hired to monitor and inspect on-site activities is:
Gerry Scheid
Senior Biologist
RECON
1927 Fifth Ave.
Suite 200
San Diego, CA 92101-2358
Mr. Scheid's credentials are on file in the Army Corps' offices. Mr. Scheid
will be involved with an oversee the grading and site plans, installation of
the rope and fencing to demarcate the limits of construction, all grading and
avoidance of open space. He will be empowered to halt construction when
and if non-compliance with the permits occurs, and he will monitor
implementation of the mitigation measures listed in the Section 404 permit.
Cala.COPlan 17
H. DEMONSTRATION THAT A CORPS-APPROVED CULTURAL
RESOURCE SPECIALIST HAS BEEN HIRED TO MONITOR
ACTIVITIES BY CULTURAL SITES. NO WORK TO BE PERFORMED
WITHIN 100 FT. OF CULTURAL SITES. CULTURAL RESOURCE
SPECIALIST SHALL:
1. BE EMPOWERED TO HALT CONSTRUCTION IF TERMS OF 404
PERMIT ARE VIOLATED
2. IMPLEMENT AND MONITOR THE MITIGATION PROGRAM,
IF WARRANTED.
The Spring, 2002 vegetation clearing program on Calavera Creek at the future
location of the College Blvd. / Cannon Rd. intersection is not within 100 feet of any
identified cultural sites. A cultural resource specialist will be hired to monitor all
clearing and grading prior to such clearing and grading beyond the intersection
location. The contract will state that this specialist will be empowered to halt
construction if any terms of the Section 404 permit are violated, and to implement
and monitor the mitigation program, if warranted.
The cultural resource specialist will be:
Dayle Cheever
Senior Archaeologist
RECON
1927 Fifth Ave.
Suite 200
San Diego, CA 92101-2358
Cala. CO Plan 18