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DATE <br />REVISION <br />OUTLET <br />PIPE <br />A A <br />PLAN VIEW <br />4" ORIFICE — SEE BELOW <br />AFINITAS GRATE PS48-58H <br />PRECAST MANHOLE <br />SECTIONS PER <br />MN/DOT STANDARD <br />PLATE 4020 <br />48" <br />FLOW <br />15" RCP <br />OUTLET PIPE <br />1 <br />iINVERT=861.00 <br />869.40 <br />4" ORIFICE <br />INVERT=866.00 <br />POND BOTTOM ELEVATION=864.00 <br />SECTION A —A <br />INTEGRAL <br />BASE <br />INFILTRATION BASIN OUTLET CONTROL STRUCTURE <br />6/11 /26 <br />CITY REVIEW NO.1 <br />NO SCALE <br />I hereby certify that this plan, specification, or report was <br />prepared by me or under my direct supervision and that I <br />am a duly icensed Profespional Engineer under the laws <br />of the Stat of Minrksota. <br />RAI J.JOCHUM, P.E. <br />Dates-18-26 Lic. No 23461 <br />DESIGNED BY: <br />CJJ <br />DRAIN BY: <br />IDM <br />CHECKED BY: <br />TAE <br />CONTRACTOR SHALL REMOVE ANY <br />ORGANIC SOIL OR CONFINING LAYERS IN <br />THE INFILTRATION AREA AND REPLACE <br />WITH NATIVE "SP" SOILS. COMPACTION <br />SHALL BE MINIMIZED TO THE MAXIMUM <br />EXTENT PRACTICAL. 0 <br />EDGE OF BUILDING <br />TRENCH DRAIN <br />SEE SHEET 8 <br />12" 12"� <br />36 5/8" <br />TRENCH DRAIN CONCRETE DETAIL <br />NO SCALE <br />BOTTOM OF BASIN = 864.00 <br />i—III1 I-III-1 1= <br />TOP OF EXISTING <br />SOILS <br />6" TOPSOIL PER MN/DOT <br />SPEC. 3877.2.F ON BASIN <br />AND SWALE BOTTOM QS <br />INFILTRATION BASIN 10®2 <br />NO SCALE <br />REFERENCE NOTES: <br />0 CONTRACTOR SHALL PROTECT THE INFILTRATION AREAS PRIOR TO THE START OF CONSTRUCTION. <br />CONSTRUCTION EQUIPMENT SHALL BE MINIMIZED OVER THE FOOTPRINT OF THE BASIN. ONLY LOW <br />PRESSURE, WIDE TRACKED EQUIPMENT SHALL BE USED FOR CONSTRUCTION. <br />02 INFILTRATION AREAS SHALL NOT BE GRADED TO WITHIN THREE FEET OF THE FINAL GRADE UNTIL <br />THE CONTRIBUTING DRAINAGE AREA HAS BEEN CONSTRUCTED AND FULLY STABILIZED OR <br />RIGOROUS EROSION PREVENTION AND SEDIMENT CONTROLS TO KEEP SEDIMENT AND RUNOFF <br />COMPLETELY AWAY FROM THE INFILTRATION AREAS HAVE BEEN PROVIDED. <br />3 POST CONSTRUCTION TESTING OF THE INFILTRATION RATE AND DRAWDOWN PERIOD IS REQUIRED. <br />TESTING SHALL BE COORDINATED WITH THE CITY ENGINEER. THE INFILTRATION RATE FOR THE <br />SOILS IN THE BOTTOM OF THE INFILTRATION BASIN SHALL BE BETWEEN 0.80 AND 8.3 INCHES <br />PER HOUR. THE CONTRACTOR MAY HAVE TO AMEND THE SOILS TO MEET THIS REQUIREMENT. <br />® COMPACTED SOIL WITHIN THE INFILTRATION BASIN SHALL BE SCARIFIED TO A DEPTH OF 12" <br />PRIOR TO RESTORATION. <br />QS CONTRACTOR MAY USE ONSITE TOPSOIL IF INFILTRATION RATES IN NOTE 3 ABOVE CAN BE MET. <br />Hakanson Anderson <br />Civil Engineers and Land Surveyors <br />3601 Thurston Ave., Anoka, Minnesota 55303 <br />763-427-5860 FAX 763-427-0520 <br />www.hakanson—anderson.com <br />WILDLIFE RESEARCH ADDITION <br />DETAILS <br />CITY OF RAMSEY, MINNESOTA <br />2165.12 <br />