HomeMy WebLinkAbout1999-12-01; Planning Commission; ; CDP 99-51 - SOUTH CARLSBAD VILLAGE STORM DRAINThe City of CARLSBAD Planning Department
A REPORT TO THE PLANNING COMMISSION
Item No.
P.C. AGENDA OF: December 1, 1999
Application complete date: October 6, 1999
Project Planner: Christer Westman
Project Engineer: Bob Wojcik
SUBJECT: CDP 99-51 - SOUTH CARLSBAD VILLAGE STORM DRAIN - A request
for approval of a Coastal Development Permit for the replacement of storm drain
and sewer interceptor transmission pipelines including the construction of a below
grade storm drain pipeline as replacement for an existing open dirt channel from
Oak Avenue to the Agua Hedionda Lagoon within the North County Transit
District right-of-way.
I. RECOMMENDATION
That the Planning Commission ADOPT Planning Commission Resolution No. 4671
APPROVING Coastal Development Permit CDP 99-51 based on the findings and subject to the
conditions contained therein.
II.INTRODUCTION
The project will implement the City of Carlsbad Master Drainage Plan and involves the
construction of a 63 and 72 inch reinforced concrete pipe (RCP) as a replacement for an unlined
ditch which runs parallel to and east of the railroad tracks. The new pipe will run from Oak
Avenue south to the Agua Hedionda Lagoon.
III. PROJECT DESCRIPTION AND BACKGROUND
The Master Drainage and Storm Water Management Plan was commissioned by the City Council
in February 1988. The purpose of the plan in part was to reassess the storm drain facility needs
of the City and update the 1980 Master Drainage Plan. The Plan also created four fee areas and
established fee categories. Once collected, fees are allotted to projects within each of the four
areas.
The project is located within Planned Local Drainage Area (PLDA) "B". Replacement storm
drains identified in PLDA "B" are located along and within the railroad right-of-way from Oak
Avenue to Agua Hedionda Lagoon. The Master Plan indicates the use of a concrete channel
from Oak Avenue to Chestnut Avenue and an earthen channel from Chestnut Avenue to
Tamarack Avenue. The remaining stretch of storm drain is shown as 63 and 72 inch RCP.
IV. ANALYSIS
The project implements the Drainage Master Plan by proposing replacement storm drains along
the railroad right-of-way. The project has modified the Master Plan recommendations by
providing RCP for the entire length from Oak Avenue to the Agua Hedionda Lagoon. The RCP
o
:AKCSICDP 99-51 - SOUTH CARLSBAD VILLAGE STORM DRAIN
December 1, 1999
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versus a concrete channel will be more aesthetically pleasing in that the surface above the RCP
can be planted. The projected capacity of the storm drain will not be reduced by the use of RCP
versus above-ground channels. In addition, the above-ground swale design and planting will
serve to replace "waters of the U.S." as defined by the Clean Water Act which will be removed
by the storm drain construction.
Because the project is the underground replacement of existing above-ground storm drains and
the replacement of existing underground sewer and storm drains, there will be no adverse
impacts or conflicts with Coastal Program policies since the project will not hinder public access .
to or from the coast and will not affect the ability to provide public recreation within the coastal
zone.
V. ENVIRONMENTAL REVIEW
A Mitigated Negative Declaration was issued for the project in June 1998 because
implementation of the project will result in the loss of 0.63 acres of waters of the U.S. and must
be reviewed by the Army Corps of Engineers through a 404 permit. No species of plants or
animals recognized as rare, threatened, endangered, or otherwise sensitive by the United States
Fish and Wildlife Service (USFWS), California Department of Fish and Game (CDFG), or
Native Plant Society are present within or adjacent to the drainage area. Impacts to the waters of
the U. S. will be mitigated to a level of less than significant through a .67 acre wetland
revegetation as proposed in the City's application to the Army Corps of Engineers for a 404
permit.
ATTACHMENTS:
1. Planning Commission Resolution No. 4671
2. Location Map
3. Mitigated Negative Declaration dated June 15, 1998
4. Exhibits "A" - "B" dated December 1,1999
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SITE
SOUTHERN CARLSBAD VILLAGE
STORM DRAINS
CDP 99-51