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;EC.~,~..~ CAMP DRESSER & McKEE INC. <br /> 710 South Broadway, Suite 201 <br /> Walnut Creek, California 94596 <br />environmental engineers, scientists, 415 933-2900 <br />planners, & management consultants <br /> <br />April 7, 1986 <br /> <br />Mr. Robert T. Okamura <br />City Engineer <br />City of Pleasanton <br />P. O. Box 520 <br />Pleasanton, CA 94566 <br /> <br /> Pleasanton Gardens Flooding Problem <br /> <br />Dear Bob: <br /> <br />We have prepared and are pleased to submit this proposal to study the storm <br />drainage system in the St. Mary's Creek Watershed and to prepare a pre- <br />liminary plan to correct the Pleasanton Gardens flooding problem. <br />Pleasanton Gardens is a 40-unit senior citizens' housing development on <br />Kottinger Drive near Second Street, and St. Mary's Creek is conveyed <br />through Pleasanton Gardens in a buried pipe. <br /> <br />During February 1986, waters from the St. Mary's Creek channel and adjacent <br />lands flooded the Pleasanton Gardens. Flooding of this housing development <br />also occurred in 1983. <br /> <br />SCOPE OF SERVICES <br /> <br />Based upon a review of a 1983 report prepared by Kennedy-Jenks, a site <br />visit, and discussions with you, we propose to perform the following <br />engineering services: <br /> <br />Task 1 - Acquire and Review Basic Data <br /> <br />Available rainfall, storm water, and drainage data will be acquired from <br />the City, Alameda County, and other agencies. Previous studies and storm <br />drainage maps will be reviewed. Flooding and drainage problem records will <br />be obtained and evaluated. <br /> <br />Task 2 - Perform Land Surveying <br /> <br />Cross-sections will be surveyed at several locations along St. Mary's Creek <br />both upstream and downstream of Pleasanton Gardens. <br /> <br />Task 3 - Model the Existing Storm Drainage System <br /> <br />The existing St. Mary's Creek system, consisting of both natural and <br />manmade facilities, will be described and entered into the EPA Storm Water <br />Management Model (SWMM). Existing land use conditions will be entered into <br />SWMM, and initial simulations will be performed. <br /> <br /> EXHibiT A <br /> <br /> <br />