1976-11-09 - Laserfiche WebLink

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November 1, 1976 TO: The Honorable Mayor and Members of the Council FROM: Thomas F. Lewcock, City Manager SUBJECT: Supplemental Report, Impr. 77-1 (Silver Oaks Estates) Statement of Problem At the time of hearing on PRD #21 (Revision to PRD #18), several residents of the Silver Oaks Estates subdivision expressed their concern to the Council as to general drainage problems in the common area, more specifically as to the cutting off of access to the common area recreational complex during high water periods., Additionally, concern was registered as to trees being under water during high water periods. Comments were also made that the bridge in the south pond was partially under water during the recent high water period. The attached topographic map portrays the area and provides historical water elevation information. The following color codings may be of use to the Council in its review: 1. Red - Existing walkway easements 2. Purple - Proposed storm sewer overflow line 3. Brown - Proposed extension of walkway system 4. Green - Boundary Lines of common area 5. Yellow - Waterline when area reaches elevation 917 in north and middle pond The three major ponds in the common area have been labeled south, middle and north. South Pond While we have not considered the south pond part of the drainage problem we tia.ll nevertheless report on the characteristics of this pond and its relationship to the others. -The south pond is at a lower elevation than the middle pond. This elevation differential has varied from 1.2 ft. to 3.6 ft. Th_e banks surrounding the pond are quite steep, and no water damage:- to buildings would be anticipated based on past history. The foot bridge was partially under water in 1975. With high water having been 914 the homes association could raise the bridge, thereby avoiding this problem in the future. Because this pond is