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CONSTRUCTION SETPERMIT SETBID DOCUMENTOWNER REVIEWAGENCY REVIEWDRAWING PHASE:GRADING PLAN‹2015 - T. Erickson, LLC - EricksonCivil - All Rights Reserved <br />C3SHEET 3 OF 6I HEREBY CERTIFY THAT THISPLAN, SPECIFICATION ORREPORT WAS PREPARED BY MEOR UNDER MY DIRECTSUPERVISION AND THAT I AM ADULY LICENSED PROFESSIONALENGINEER UNDER THE LAWS OFTHE STATE OF MINNESOTA.DATE:TODD A. ERICKSON, PELICENSE NO.40418EXISTING PROPERTY BOUNDARY1) ALL CONSTRUCTION AS CALLED FOR ON THESE CONTRACT DOCUMENTS SHALLBE PERFORMED IN ACCORDANCE WITH ALL OSHA REQUIREMENTS.2) THE GRADING CONTRACTOR SHALL SCHEDULE THE SOILS ENGINEER SO THATCERTIFICATION OF ALL CONTROLLED FILLS WILL BE FURNISHED TO THE OWNERDURING AND UPON COMPLETION OF THE PROJECT.3) SPOT ELEVATIONS/CONTOURS SHOWN AS FINISHED GRADE ELEVATIONS.4) PRIOR TO ON SITE EXCAVATION OR DEMOLITION WORK, INSTALL EROSIONCONTROL MEASURES IN LOCATIONS SHOWN OR AS DIRECTED BY THE ENGINEEROR CITY STAFF.5) EROSION CONTROL MEASURES SHOWN ON THE EROSION CONTROL PLAN ARETHE ABSOLUTE MINIMUM. THE CONTRACTOR SHALL INSTALL SEDIMENT TRAPS ORBASINS AND BIO LOG AS DEEMED NECESSARY TO CONTROL EROSION.6) GRADING OPERATIONS SHALL BE CONDUCTED IN A MANNER TO MINIMIZE THEPOTENTIAL FOR SITE EROSION. SEDIMENT CONTROL PRACTICES MUST BEESTABLISHED PRIOR TO THE START OF ANY UP GRADIENT LAND DISTURBINGACTIVITIES7) PROVIDE 6" OF NATIVE TOPSOIL IN GREEN AREAS.8) ALL EXPOSED SOIL AREAS MUST BE STABILIZED AS SOON AS POSSIBLE TO LIMITSOIL EROSION BUT IN NO CASE LATER THAN 14 DAYS AFTER THE CONSTRUCTIONACTIVITY IN THAT PORTION OF THE SITE HAS TEMPORARILY OR PERMANENTLYCEASED.9) IF SEDIMENT ESCAPES THE CONSTRUCTION SITE, OFF-SITE ACCUMULATIONS OFSEDIMENT MUST BE REMOVED IN A MANNER AND AT A FREQUENCY SUFFICIENTTO MINIMIZE OFF-SITE IMPACTS.10) TEMPORARY SOIL STOCKPILES MUST HAVE SILT FENCE OR OTHER EFFECTIVESEDIMENT CONTROLS, AND CANNOT BE PLACED IN SURFACE WATERS,INCLUDING STORMWATER CONVEYANCES SUCH AS SWALES AND DITCHESUNLESS THERE IS A BYPASS IN PLACE FOR THE STORMWATER.11) SLOPES 3:1 AND GREATER SHALL BE STABILIZED WITH EROSION CONTROLBLANKET.12) MAINTAIN AND REPAIR EROSION CONTROL MEASURES (INCLUDINGREMOVAL OF ACCUMULATED SILT) UNTIL VEGETATION IS ESTABLISHED.CONTRACTOR TO INSPECT AND DOCUMENT EROSION CONTROL DAILY ANDAFTER ANY RAIN EVENT. ALL SEDIMENT CONTROL FEATURES MUST BEREPAIRED WHEN THE SEDIMENT REACHES 1/3 THE HEIGHT OF THESTRUCTURE, OR REPLACED WITHIN 24 HOURS OF DISCOVERY. EROSIONCONTROL STRUCTURES FOUND DAMAGED MUST BE REPAIRED ORREPLACED W/IN 24 HOURS UPON DISCOVERY. REMOVAL OF EROSIONCONTROL STRUCTURES REQUIRED AFTER SITE IS STABILIZED (ATDIRECTION OF ENGINEER).13) ALL EXISTING CITY STREETS SHALL BE SWEPT AS NEEDED AND ASREQUESTED BY ENGINEER OR CITY STAFF.14) REFER TO GEOTECHNICAL REPORT FOR ADDITIONAL REQUIREMENTS.15) AFTER GRADING OPERATIONS ARE COMPLETED, LANDSCAPE CONTRACTORSHALL UNCOMPACT ALL GREEN AREAS PRIOR TO SODDING ANDLANDSCAPING.16) PERMANENT RESTORATION IN LAWN AREAS SHALL CONSIST OF PLACINGSOD PER MNDOT 3878.2.A SPECIFICATIONS. SOD STRIPS SHALL NOT HAVEDEAD OR DRY EDGES AND SHALL NOT BE CUT MORE THAN 24 HOURS INADVANCE OF DELIVERY.17) TEMPORARY STABILIZATION OF SLOPES AND GRADING AREAS DURINGCONSTRUCTION SHALL BE A MN/DOT 150 MIXTURE. TEMPORARY SEEDMIXTURE SHALL BE PLACED WITH A DRILL AT A RATE OF 60 LBS/ACRE.18) SOD AND INSTALLATION OF EROSION CONTROL BLANKET SHALL BECOMPLETED WITHIN 48 HOURS OF FINAL GRADING.19) POSITIVE DRAINAGE OF MINIMUM 2% SLOPE SHALL BE ACHIEVED AWAYFROM PROPOSED BUILDING.EXISTING 2-FT CONTOUR930PROPOSED 2-FT CONTOUR930MATCH EXISTING BITUMINOUS PAVEMENT ELEVATIONS.PROPOSED ROCK CONSTRUCTION ENTERANCE. REFER TO DETAIL 6/C5.12PROPOSED SPOT ELEVATIONG = PROPOSED GROUND SURFACEgl = GUTTER LINEc = CONCRETE SURFACEb = BITUMINOUS SURFACEtw = TOP OF WALLbw = BOTTOM OF WALLNOTE: * REPRESENTS EXISTING GRADE.930.50glRICKSONCivilE06/24/2016NPROPOSED HEAVY DUTY SILT FENCEStillwater, Minnesota 55082 <br />6750 Stillwater Blvd, Suite 200ELK RIVER, MINNESOTA 3INSTALL 6 CY CLASS III RIP RAP OVER GEOTEXTILE FABRIC (MNDOT 3733, TYPE IV).416-128ELK RIVER SENIOR LIVING 9" MNDOT SPEC. BIO LOG20-FT WIDE ,10-FT BOTTOM, EMERGENCY OVERFLOW ATELEVATION 909.0 - INSTALL PERMANANT EROSION MAT.INFILTRATION BASIN SECTIONC316" MIXTURE OF 75% SAND, 25% COMPOSTSAND: PROVIDE CLEAN CONSTRUCTIONSAND, FREE OF DELETERIOUS MATERIALS.AASHTO M6 OR ASTM C-33 WITH GRAIN SIZEOF 0.02"-0.04", PLACE DRAIN TILE ASSHOWN ON PLAN. COMPOST: MN/DOT GRADE 2EXISTING SP POORLY GRADED SANDWATER SURFACE BELOW 893 (END OF BORING)REMOVE EXISTING ORGANIC SOILS ANDREPLACE WITH ON-SITE GRANULAR BORROW.4" 3-4" RIVER ROCK OVER GEOTEXTILE FABRIC CAT. 4 NON WOVENPOND BOTTOMELEV. 902.0Contractor SHALL notify District staff at least 48 hours prior to theconstruction of the infiltration basin in order to provide for Districtconstruction observation. Failure to notify the District prior to theinstallation may result in the removal of work completed.INFILTRATION CHAMBER CONSTRUCTION:1) The contractor shall excavate the final fill materialbelow elevation 888 and construct the infiltration basinafter all the site improvements are in place includingestablished vegetation. Estimated start date for thisactivity is fall of 2016.2) Erosion control measures shall be left in place untilsite is 100% stabilized as determined by WatershedDistrict Staff.NOTE: CONSTRUCTION INFILTRATION POND AFTER SITE IS STABILIZED WITH TURF.433211HEAVY DUTY SILT FENCEBIO LOG