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DATE REVISION <br />6/11/26 CITY REVIEW NO.1 <br />A <br />L <br />OUTLET —\ <br />PIPE <br />FLOW <br />PRECAST MANHOLE <br />SECTIONS PER <br />MN/DOT STANDARD <br />PLATE 4020 <br />FLOW <br />15" RCP <br />OUTLET PIPE <br />1 <br />PLAN VIEW <br />48" <br />INVERT=861.00 <br />SECTION A —A <br />4" ORIFICE — SEE BELOW <br />AFINITAS GRATE PS48-58H <br />— 869.40 <br />4" ORIFICE <br />INVERT=866.00 <br />INTEGRAL <br />BASE <br />POND BOTTOM ELEVATION=864.00 <br />INFILTRATION BASIN OUTLET CONTROL STRUCTURE <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 Profeshional Engineer under the laws <br />of the Stat of Min sofa. <br />Dat=5-18-26 <br />RA <br />J.IJOCHUM, P.E. <br />DESIGNED BY: <br />CJJ <br />DRAWN BY: <br />IDM <br />CHECKED BY: <br />Lic. No 23461 TAE <br />CONTRACTORSHALL 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. Q3 <br />. 4 A <br />EDGE OF BUILDING <br />-- TRENCH DRAIN <br />SEE SHEET 8 <br />36 5/8" <br />12" <br />4 . 4 <br />TRENCH DRAIN CONCRETE DETAIL <br />NO SCALE <br />—BOTTOM OF BASIN = 864.00 <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 1®® <br />NO SCALE <br />REFERENCE NOTES: <br />® 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 />© 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 />03 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 />®5 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 />