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r <br /> [Tr' Trepanier Engineering <br /> II Professional Civil Engineering <br /> J <br /> r <br /> August 19, 1998 <br /> Job No. 97-070 <br /> Attn: Bill Luce <br /> Northshore Christian Church <br /> ' 1410 80th Street SW, Suite A <br /> Everett, Washington 98203 <br /> RE: CONSTRUCTION COST ESTIMATE AND <br /> COST ALLOCATION - LOT 3 OF SEAWAY CENTER <br /> Gentlemen: <br /> This office has completed a Preliminary Construction Cost <br /> ' Estimate for the proposed westerly drainage facilities on <br /> the subject lot. <br /> We have estimated that one retention/detention system will <br /> handle the water from Lots 3C, D and E and 23rd Avenue West <br /> of the Binding Site Plan. <br /> Our estimates of areas draining to the pond are as follows: <br /> ' 1 . 23rd Avenue W 1 . 17 Acres <br /> 2 . Lot 3C 3. 15 Acres <br /> 3 . Lot 3D 11 .55 Acres <br /> 11 4 . Lot 3E 5. 03 Acres <br /> TOTAL: 20. 90 Acres <br /> Our volume calculations show 90, 000 cubic feet of total <br /> volume storage is required. Adding a 45% required safety <br /> 11 factor results in 130, 500 cubic feet of live storage <br /> required. In addition, the City requires 1 . 16 Acre feet of <br /> dead storage (water quality) . <br /> r <br /> r <br /> 1420 Hewitt • Everett, Washington 98201 • Everett (206) 259-5556 • FAX(206) 259-5558 <br /> r <br />