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Mr. Gerald Zimmerman January 31, 1989 Page 2 5) 7) 8) The plat has been reviewed by the Park Commission and it is my understanding that the jog in the 75 foot wide park trail on the south boundary of the plat is to provide a trail around the ponding area. Based on water levels in 1985, the area below the 871 contour was under water. Therefore, I would recommend that additional area be dedicated for parkland to provide access around the ponding area. In determining the' amount of park dedication, the area for ponding should be excluded. Since the land dedication is less than 10%, the balance will have to be paid in cash. Runoff from the culvert across 158th Lane N.W. does not appear to have a positive outlet. Therefore, a means for containing a 100 year flood needs to be shown on the grading plan. It appears that the wetland in the northwest area of the plat will be used as a detention pond. The area in the proposed park is also to be used as a detention pond. Easements for all detention ponds and drainageways to those ponds will have to be provided. High water elevations for all the ponds should be determined and grading of the ponding areas should be shown to provide for storage of the 100 year storm. Since none of the detention areas have outlets, the building elevations of the lowest floor should be set at least three feet above the highest known water levels as stated in the Environmental Protection Ordinance. In review of the street plan, we find it is in conformance with standards. However, a profile of existing streets within 200 feet of the plat boundary should be provided to show how the proposed streets will connect to the existing streets. Also, the existing cul-de-sacs should be removed at the time of construction. In review of the lots in Block 2, we find they are long and narrow and do not adopt future resubdivision. A short cul- de-sac off Okapi Street would allow for a better configuration of lots.