11-10-1986 Council Packet - Laserfiche WebLink

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To: Mary Butler, Mayor Mark E. Bern, rdson, City -Adminis*rotor Orono Council Members Orono Planning Commission Members From: Michael P. Gaffron, AS,* Planning & Zoning Administrator Date: Octcuer 17, 1986 Subject: #1082 Johi '. L..ugan, 2785 White Oak Circle - Conditional Use Permit - Public Hearing Zoning District - RR-lB Application - Conditional use permit for grading/excavating to create P storage po._ for flood control purposes. List of Exhibits Exhibit A - Application Exhibit B - Plat Map Exhibit C - Property Owners List Exhibit D - Survey/Grading Plan Exhibit E - Staff Letter 5/29/84 Exhibit F - MCWD Letter 8/26/86, Mcwt�-- Exhibit G - Topography of Sub -watershed Above Pond i_bit H - Air Photo Section Description of need project - The applicants ar posing to create a storage pond to collect runoff from the occasions! 'gully washer" that inundates their :i=.ckyard for 12 to 48 houi periods. The upstream watershed ',as beer a 1 cu lated by staff at about 17 acres, the runoff from which is ap-parently very rapid due to steeper slopes apstream. After f lowing- through -he culvert under Old Crystal Bay Road the watershed flattens out _n Dougan's backyard, which is not a designated wetiand and which, prior to c:nnstru(. ion of the White Oak Circle development, was cropland. 'Where apparently exist some old agricultural tiles which drain Dougan's backyard farther to the east, and staff has surmised that these tiles, although not located, may be near the surface. In a heavy rain—il , Dougan's backyard fills up to as much as 12-18" deep with waiter, ther. -i.n a period of 12 ' o 48 hours it disappears without a cleat overland chan-elization. We do know that when the water: gets high enough it fl.)ws astward through neighbrr Marier's backyard and th n southeast towa: the cul-c'.e-sac, but there must be some underground tiling that reu...•,eL the pcnde,T areas quickly. Dougan's drainfield is in a relatively low area west of the house, and is adversely rffecteL: by the runoff ponding near it. The proposal is to create a pond for storage near the culvert, then use the spoils to fill near the grainfield nnl create a Swale to channelize the ater past the 1rainfield.