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HomeMy WebLinkAbout016_D3.0-STORM PONDWWWWWWWSSSSSSSSSSSSSSWWWWWWW4593.004592.504593.504593.004591.504590.504590.504591.504592.504592.50 4590.50 11"X17": 1"= 20 ftNGRAPHIC SCALE1 inch = ft.0( IN FEET )5101010HEADWATERSPROJECT NUMBERDRAWING NUMBERDRAWN BY:DATE:2026VERIFY SCALETHESE PRINTS MAY BEREDUCED. LINE BELOWMEASURES ONE INCH ONORIGINAL DRAWING. MODIFY SCALE ACCORDINGLYH:\2035\004\ACAD\SHEETS\STORM SHEETS.dwg Plot Date: 4/23/2026 10:00 AM© HEADWATERS ENGINEERING, INC.REVISION DATE:1105 REEVES RD WEST, SUITE 6, BOZEMAN, MT 59718HEADWATERSMT.NET406-581-5730PROJECT LOCATIONMONTANABOZEMAN03/26/2026RESTORM POND GEOLOGIC3480 PRINCE LANEKAUFMANN'S OVERHEAD DOOR, INC. 2035.004D3.04 59 1 .1 0 4 59 0 .1 0 CC11"X17": 1"= 10 ftGRAPHIC SCALE1 inch = ft.0( IN FEET )2.5555EXISTING PAVEMENTEXISTINGCURBEXISTING ROAD MIXEXISTING GRAVEL SUBBASEEXISTING TOPSOIL, TYP.NATIVE GRAVELSNATIVE GRAVELSEXISTING GRAVEL FILLBELOW POND BOTTOMEXISTING PONDPROPOSED PONDNATIVESILT/CLAYPROPOSED STORM PONDEXISTING STORM PONDEX I S T I N G C U R B CROSS-SECTIONFUTURE BUILDING 2APPROXIMATE HIGHGROUNDWATER LEVELFINISHED GROUNDEXISTING GROUNDPERCOLATIONTEST LOCATIONNOTES:1.PROPOSED STORM POND TO BE OVER-EXCAVATED TO NATIVE GRAVELS ANDBACKFILLED WITH IMPORTED, WELL-DRAINING GRAVELS TO THE DESIGN BOTTOMELEVATION.2.HIGHEST GROUNDWATER RECORDED WITH SUBDIVISION GROUNDWATERMONITORING ON SUBJECT LOT WAS ~6.5' BELOW NATIVE GROUND,APPROXIMATELY 3-4' BELOW PROPOSED POND BOTTOM.3.GEOTECHNICAL INVESTIGATIONS SUGGEST HIGH GROUND WATER LEVEL ISCONSISTENT WITH NATIVE GRAVEL DEPTH.4.PERCOLATION TESTING SHOWED INFILTRATION RATES FASTER THAN 6 INCHESPER MINUTE.EXISTING 12" CULVERTEXISTING TRAIL