9506 7TH AVE SE 2018-01-02 MF Import

Dacer.ber 6, 1978 Mr. Tracy Gill 13123 48th Ave, tI.E. •r• Narysville, KA 98270 Subject: Review of Drainage Plan Proposal fo:- the Everett Free Methodist Church, 9506 - 7th Ave. S.E. Dear Tracy, The review of your revised drainage plan proposal was completed December 5, 1978, and is being returned to you. The proposal covers 3-1/2 acres for an approximate predevulopment run-off of 937 cubic feet. A 20 minute storm discharging at a rate of 0.2 cubic feat per second requires a storage capacity of 3000 cubic feet. The plan review shows a discharge of 0.25 cubic feet per second which requires 3680 cubic feet of storage capacity. Another matter that needs attention is that tie area under development appears to exceed 3-1/2 acres; therefore, the calculations must be corrected accordingly. Also, no details of orifice were provided and the pencilled corrections and additions to the plans are unsatisfactory. In addition, the plans are required to show protection from blockage by siltation (such as rack work) at thv outlet pipe, also required is the ronding capacity and necessary details about the detention; the .control is to be placed in i]:^_ pond rather than in the parking area; and safety fencing is reruirod on pond slopes in e:ress of 3 to 1 ratio. The pze'per proceduTa for resubmittal of the revised plans Is to deliver 4 set- of plans and calculations to the Building Department which is located on Olympic Drive at Hadison. Pl vs shall not be delivered directly to the Public Works Department. I have enclosed, for your convenience, an acceptable format for submittal Of the required drainage plan. Additionally, an illustration on the apprc:p-iate form has been provided based on the 3-1/2 acre proposal rather than on tin larger area.