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Mr. Steve Ach • November 20, 1996 Page Two B. PRELIMINARY UTILITY PLAN • All watermain within this plat needs to be looped or provide for the opportunity of looping in the future. Therefore, Quinn Court should be looped to 194th Avenue and Rush Court should be looped to Seymour Street. • The preliminary utility plan should show the proposed valve and fire hydrant locations, so that these may also be reviewed. • There will be a need for a trunk watermain along Highland Road from County Road 77 to the north along Rush Street tying into the plat of Lafayette Woods. • Sanitary sewer service will need to be evaluated by the City to determine how to best serve this development. The two most likely options would be, first, to have this development construct a lift station of adequate depth and size to serve the entire plat and pump either to the lateral system within Lafayette Woods, or along 193rd Avenue to the trunk line in the Trail corridor. The • route of the forcemain would be dependent on timing of the Lafayette Woods development. The other option would be to extend a trunk line from the existing line in the Trail corridor through the south end of Lafayette Woods and terminate at the west plat boundary of Cherrywood Hills at an adequate depth to provide gravity service to the entire plat. We will continue to evaluate these two options and discuss them further as we have more information. • The street section for this plat needs to be 32 feet wide face-of-curb to face- of-curb. The typical pavement section would be 5" of aggregate base and two lifts of bituminous 3-31/2" in total. This section will need to be verified with soil borings. C. PRELIMINARY GRADING PLAN • The bulk of the drainage from the plat is routed to a sedimentation pond located in the rear of Lots 15 and 16, Block 4. Drainage calculations will need to be provided for this plat including the sizing of the sedimentation pond. The sedimentation pond should be moved further away from the rear of the houses on those two lots, such that a relatively flat area can be provided at the walk-out elevation before the slope into the pond. • • The drainage from the 193rd Avenue cul-de-sac in the southeast corner of the plat needs to be provided with sedimentation ponding, prior to discharge to the wetland. 230/348-1907.nov