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HomeMy WebLinkAboutCT 01-16; CASA LAGUNA; STORM WATER MANAGEMENT PLAN; 2002-08-01FRASER ENGINEERING^ 1NC» 2191 El Camino Real, Oceanside, 920S4 . ^750; 722-3495 . FAX (760) 722-3490 . . <e) storm Water Management Plan FOR Casa Laguna Merit Group, Inc. 2171 El Camino Real Suite 202 Oceanside, CA. 92056 August, 2002 JOB NO. 088-03-24 Storm Water Management Plan For Casa Laguna Development Carisbad, CA. General: Casa Laguna is a proposed single-family residential development within the City of Carisbad on the northerly side of Laguna Drive at the intersection with Madison Street. The site is approximately 50,400 square feet (210' x 240'), or approximately1.16 acres of gently sloping ground (northeasterly to southwesterly). The site is currently undeveloped, but will consist of six (6) duplex units with an asphalt-paved drive and concrete sidewalks upon full developmenL The paved driveway will convey ainoff overland via curb and gutter to a proposed inlet at the southwest corner of the driveway at Laguna Drive. This inlet will convey the runoff to the existing City of Carlsbad stonn drain system via buried stomri drain piping. The development also proposes small diameter (6") stomi drain pipe along the westerly and easterly boundaries to collect surface runoff from the lots and roof drains. These smaller drains will also convey runoff into the City of Carisbad stonn drain system near the above- mentioned inlet. Best Management Practices: The Best IVIanagement Practices for this project are separated into two (2) categories: Construction-Related BMP's, and Post-Construction BMP's. The construction-related BMP's will be utilized throughout the construction- related activities on the site and will be the responsibility of the general contractor for the site construction. Mr. Bill Seward of Merit Group, Inc. will function as owner's representative. The post-construction BMP's will be utilized upon completion of construction. Responsibility for these BMP's will be through the Homeowners Association. The BMP's for the Construction-Related activities are shown on the attached "Storm Water Management Plan" and described as follows: • Construction and maintenance of a rock construction entrance at the entry to the site; • Installation and maintenance of a straw bale barrier along the perimeter of the site; • Installation and maintenance of hay bale silt barriers at all minor drain inlets (see plan for locations); • Installation and maintenance of block screen gravel silt basins at all major drain inlets (see plan for locations); • Installation and maintenance of graded swales along easteriy and westeriy property lines; • Installation and maintenance of gravel bag barriers in the graded swales mentioned above; • Installation and maintenance of gravel bag barriers on the graded private drive at the 1/3 points (approximately 60' on center); • Installation of hydroseed on "padded" lots where slope is less than 6%; • Good housekeeping including inspection and maintenance of BMP facilities before and after stomns and at regular intervals. 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