HomeMy WebLinkAboutCT 98-14; Thompson/Tabata; Tentative Map (CT) (70)WILSON ENGINEERING
DEXTER S. WILSON, P.E.
ANDREW M. OVEN, P.E.
STEPHEN M. NIELSEN, P.E.
MEMORANDUM 615-006
To: Gregg Linhoff, Standard Pacific
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From: Andrew Oven, Wilson Engineering
Date: September 10,1998
Subject: Water System for Thompson Property in City of Carlsbad
The purpose of this memorandum is to provide a preliminary overview of water service
to the Thompson property. The Thompson property is located in the southwestern
quadrant of the City of Carlsbad, east of Interstate 5. Poinsettia Lane bisects the
northern portion of the project, and Alga Road is just to the east of the project.
The proposed project is within two water service zones: the 550 Zone and the 375 Zone.
Existing water facilities for both zones are located within Alga Road and within
Poinsettia Lane. Water lines for both the zones also exist along the northern property
boundary of the project. Along the west and south borders of the property, existing
water service is provided by the 375 Zone.
Exhibit A, attached to this memorandum, provides a schematic of the recommended
water system layout for the proposed Thompson property development. The majority
of the property is intended to be served from the 550 Zone with looping connected to
Poinsettia Lane. The western and southern portion of the project is intended to be
served by the 375 Zone with looping connections to the existing 8-inch 375 Zone water
main in Alyssum Road and also in Rose Drive. On the north end of the project, north
of Poinsettia Lane, the two proposed cul-de-sacs are intended to be served by the 550
Zone extending from the existing 550 Zone facilities north of the project.
703 PALOMAR AIRPORT ROAD, SUITE 300 • CARLSBAD, CA 92OO9 • (760)438-4422 • FAX (76O) 438-O1 73
Gregg Linhoff
September 10, 1998
Page 2
There is an existing 8-inch 375 Zone water main that traverses the middle of the
property in a north-south direction. It connects between Poinsettia Lane and existing
Rose Drive. This existing 8-inch water line is intended to be abandoned and removed.
The loop that it currently creates will be replaced by the loop provided by the 375 Zone
piping connecting between Alyssum Road and Rose Drive.
Static pressures in the 550 Zone service area are expected to range between 106 psi
and 148 psi within the Thompson property. For the 375 Zone service area, static
pressures are expected to range between 69 psi and 78 psi. The preliminary pipe sizes
shown on Exhibit A are adequate to provide domestic and fire flow requirements to the
subdivision. The expected fire flow requirement for this project is 1,750 gallons per
minute for a single-family residence.
Please contact us if you have any questions regarding our preliminary layout of water
facilities.
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