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SWPPP NOTES
<br />AND DETAILS
<br />C3-3
<br />C ADD f iles pr epar ed by t he Cons ult ant for this p roject ar e
<br />instruments of the Consultant professional services for use solely
<br />with respect to this project. These CADD files shall not be used
<br />on other projects, for additions to this project, or for completion
<br />of t his p r ojec t by ot her s w it hou t wr i t te n ap pr ov al b y t he
<br />C onsultant . With t he Cons ultant's appr oval, ot hers may be
<br />per mit t ed t o ob t ain cop ies of t he C AD D dr aw ing files f or
<br />information and reference only. All intentional or unintentional
<br />revisions, additions, or deletions to these CADD files shall be
<br />made at the full risk of that party making such revisions, additions
<br />or deletions and that party shall hold harmless and indemnify the
<br />Consultant from any & all responsibilities, claims, and liabilities.
<br />PLANNING
<br />CIVIL ENGINEERING
<br />LAND SURVEYING
<br />LANDSCAPE ARCHITECTURE
<br />ENVIRONMENTAL
<br />7200 Hemlock Lane, Suite 300
<br />Maple Grove, MN 55369
<br />763.424.5505
<br />www.loucksinc.com
<br />Plotted: 09 /16 / 2021 12:53 PMW:\2020\20499\CADD DATA\CIVIL\_dwg Sheet Files\C3-3 SWPPP NOTESOUCKSL
<br />CADD QUALIFICATION
<br />QUALITY CONTROL
<br />PROFESSIONAL SIGNATURE
<br />SUBMITTAL/REVISIONS
<br />LAKEVIEW
<br />FAMILY
<br />DENTISTRY
<br />14475 FOREST BOULEVARD NORTH
<br />HUGO, MINNESOTA 55038
<br />LAKEVIEW
<br />FAMILY
<br />DENTISTRY
<br />14475 FOREST BOULEVARD NORTH
<br />HUGO, MINNESOTA 55038
<br />08/13/21 CITY SUBMITTAL
<br />09/03/21 CITY SUBMITTAL
<br />09/16/21 CITY SUBMITTAL
<br />Review Date
<br />SHEET INDEX
<br />License No.
<br />Date
<br />I hereby certify that this plan, specification or report was
<br />prepared by me or under my direct supervision and that
<br />I am a duly Licensed Professional Engineer under the
<br />laws of the State of Minnesota.
<br />Project Lead
<br />Drawn By
<br />Checked By
<br />Loucks Project No.
<br />Trevor D. Gruys - PE
<br />53706
<br />20499
<br />TDG
<br />TDG/MDC
<br />TDG
<br />09/16/2021
<br />C1-1 EXISTING CONDITIONS
<br />C1-2 DEMOLITION PLAN
<br />C2-1 SITE PLAN
<br />C3-1 GRADING PLAN
<br />C3-2 SWPPP
<br />C3-3 SWPPP NOTES
<br />C4-1 UTILITY PLAN
<br />C8-1 CIVIL DETAILS
<br />C8-2 CIVIL DETAILS
<br />L1-1 LANDSCAPE PLAN
<br />L2-1 LANDSCAPE DETAILS
<br />P1-1 PHOTOMETRICS PLAN
<br />CONSTR
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<br />NOT FOR
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<br />SWPPP NOTES
<br />AND DETAILS
<br />C3-3
<br />SWPPP NOTES SITE VICINITY MAP CONSTRUCTION STORMWATER SPECIAL WATERS SEARCH MAP
<br />1.THE NATURE OF THIS PROJECT WILL CONSIST OF CONSTRUCTING A
<br />PROPOSED BUILDING ADDITION, PARKING LOT, SURFACE PAVEMENTS,
<br />INFILTRATION BASIN, AND UTILITIES.
<br />2.THE INTENDED SEQUENCING OF MAJOR CONSTRUCTION ACTIVITIES ARE AS
<br />FOLLOWS:
<br />1.INSTALL VEHICLE TRACKING BMP
<br />2.INSTALL INLET PROTECTION
<br />3.INSTALL SILT FENCE AND BIO-ROLLS AROUND SITE
<br />4.CLEAR AND GRUB SITE
<br />5.STRIP AND STOCKPILE TOPSOIL
<br />6.REMOVE PAVEMENTS AND UTILITIES
<br />7.ROUGH GRADE SITE
<br />8.IMPORT CLEAN FILL FOR REPLACEMENT AND BALANCE
<br />9.INSTALL UTILITIES
<br />10.INSTALL BUILDING FOUNDATIONS
<br />11.INSTALL CURB AND GUTTER
<br />12.INSTALL PAVEMENTS AND WALKS
<br />13.FINAL GRADE SITE
<br />14.REMOVE ACCUMULATED SEDIMENT FROM STORMWATER SYSTEMS
<br />15.SEED AND MULCH
<br />16.WHEN ALL CONSTRUCTION ACTIVITY IS COMPLETE AND THE SITE IS
<br />STABILIZED, REMOVE SILT FENCE, BIO-ROLLS, INLET PROTECTION, AND
<br />RESEED ANY AREAS DISTURBED BY THE REMOVAL.
<br />3.SITE DATA
<br />DISTURBED AREA: 0.85 AC
<br />PRE-CONSTRUCTION IMPERVIOUS AREA:0.26 AC
<br />POST-CONSTRUCTION IMPERVIOUS AREA:0.43 AC
<br />GENERAL SOIL TYPE:SEE GEOTECHNICAL EVALUATION REPORT
<br />4.EROSION AND SEDIMENT CONTROLS WERE DESIGNED TO EFFECTIVELY
<br />CONTROL STORMWATER RUNOFF WITHIN THE PROJECT AREAS. EROSION
<br />AND SEDIMENT CONTROL HAVE BEEN PROPOSED TO MINIMIZE CHANNEL
<br />EROSION AND SCOUR IN THE IMMEDIATE VICINITY OF DISCHARGE POINTS.
<br />FACTORS THAT WERE CONSIDERED INCLUDE PROPOSED IMPERVIOUS AREAS,
<br />SLOPE OF IMPERVIOUS SURFACES, STORMWATER INFRASTRUCTURE
<br />DISCHARGE POINTS, AND ANNUAL AVERAGE PRECIPITATION DATA FOR THE
<br />PROJECT AREA.
<br />5.WASHINGTON COUNTY RECEIVES AN AVERAGE OF 33.94 INCHES OF
<br />PRECIPITATION PER YEAR. THE FOLLOWING WASHINGTON COUNTY
<br />24-HOUR STORM EVENTS ARE BASED ON ATLAS 14 RAINFALL DATA:
<br />10-YR 4.16 INCHES
<br />100-YR 7.14 INCHES
<br />6.SEE "EXHIBIT:PROPOSED DRAINAGE AREAS" FOR SITE MAP WITH DRAINAGE
<br />AREA BOUNDARIES.
<br />7.THE LOCATION OF AREAS NOT TO BE DISTURBED MUST BE IDENTIFIED WITH
<br />FLAGS, STAKES, SIGNS, SILT FENCE, ETC. BEFORE CONSTRUCTION BEGINS.
<br />8.CONTRACTOR SHALL INSTALL RAIN GAUGE ON SITE.
<br />9.NO DEWATERING IS EXPECTED TO OCCUR ON SITE.
<br />10.ALL DISTURBED GROUND LEFT INACTIVE FOR SEVEN (7 OR MORE DAYS SHALL
<br />BE STABILIZED BY SEEDING OR SODDING (ONLY AVAILABLE PRIOR TO
<br />SEPTEMBER 15) OR BY MULCHING OR COVERING OR OTHER EQUIVALENT
<br />CONTROL MEASURE.
<br />11.ON SLOPES 3:1 OR GREATER MAINTAIN SHEET FLOW AND MINIMIZE RILLS
<br />AND/OR GULLIES, SLOPE LENGTHS CAN NOT BE GREATER THAN 75 FEET.
<br />DENOTES SLOPES GREATER THAN 3:1. ALL 3:1 SLOPES TO BE STABILIZED
<br />WITH EROSION CONTROL BLANKET
<br />12.ALL STORM DRAINS AND INLETS MUST BE PROTECTED UNTIL ALL SOURCES
<br />OF POTENTIAL DISCHARGE ARE STABILIZED.
<br />13.SOIL COMPACTION SHALL BE MINIMIZED DURING CONSTRUCTION.
<br />14.TEMPORARY SOIL STOCKPILES MUST HAVE EFFECTIVE SEDIMENT CONTROL
<br />AND CAN NOT BE PLACED IN SURFACE WATERS OR STORM WATER
<br />CONVEYANCE SYSTEMS. TEMPORARY STOCKPILES WITHOUT SIGNIFICANT
<br />AMOUNT OF SILT, CLAY, OR ORGANIC COMPOUNDS ARE EXEPMT EX: CLEAN
<br />AGGREGATE STOCK PILES, DEMOLITION CONCRETE STOCKPILES, SAND
<br />STOCKPILES.
<br />15.SEDIMENT CONTROL PRACTICES SHALL BE INSTALLED ON ALL
<br />DOWNGRADIENT PERIMETERS AND UPGRADIENT OF ANY BUFFER ZONES.
<br />16.SEDIMENT LADEN WATER MUST BE DISCHARGED TO A SEDIMENTATION
<br />BASIN WHENEVER POSSIBLE. IF NOT POSSIBLE, IT MUST BE TREATED WITH
<br />THE APPROPRIATE BMP'S.
<br />17.SOLID WASTE MUST BE DISPOSED OF PROPERLY AND MUST COMPLY WITH
<br />MPCA DISPOSAL REQUIREMENTS.
<br />18.EXTERNAL WASHING OF CONSTRUCTION VEHICLES MUST BE LIMITED TO A
<br />DEFINED AREA OF THE SITE. RUNOFF MUST BE PROPERLY CONTAINED.
<br />19.NO ENGINE DEGREASING IS ALLOWED ON SITE.
<br />20.THE OWNER WHO SIGNS THE NPDES PERMIT APPLICATION IS A PERMITTEE
<br />AND IS RESPONSIBLE FOR COMPLIANCE WITH ALL TERMS AND CONDITIONS
<br />OF THE PERMIT. THE OPERATOR (CONTRACTOR) WHO SIGNS THE NPDES
<br />PERMIT APPLICATION IS A PERMITTEE FOR PARTS II.B., PART II.C, PART II.B-F,
<br />PART V, PART IV AND APPLICABLE CONSTRUCTION ACTIVITY REQUIREMENTS
<br />FOUND IN APPENDIX A, PART C. OF THE NPDES PERMIT AND IS JOINTLY
<br />RESPONSIBLE WITH THE OWNER FOR COMPLIANCE WITH THOSE PORTIONS
<br />OF THE PERMIT.
<br />21.TERMINATION OF COVERAGE-PERMITTEE(S) WISHING TO TERMINATE
<br />COVERAGE MUST SUBMIT A NOTICE OF TERMINATION (NOT) TO THE MPCA.
<br />ALL PERMITTEE(S) MUST SUBMIT A NOT WITHIN 30 DAYS AFTER THE
<br />FOLLOWING CONDITIONS HAVE BEEN MET:
<br />A.PERMIT TERMINATION CONDITIONS, PER NPDES PERMIT SECTION 13.1
<br />HAVE BEEN ACHIEVED ON ALL PORTIONS OF THE SITE FOR WHICH THE
<br />PERMITTEE IS RESPONSIBLE.
<br />A.A.PERMANENT UNIFORM PERENNIAL VEGETATIVE COVER MUST BE
<br />ESTABLISHED AT 70% DENSITY OF ITS EXPECTED FINAL GROWTH.
<br />A.B.THE PERMANENT STORMWATER TREATMENT SYSTEM IS
<br />CONSTRUCTED, MEETS ALL REQUIREMENTS, AND IS OPERATING AS
<br />DESIGNED.
<br />A.C.ALL TEMPORARY SYNTHETIC EROSION PREVENTION AND
<br />SEDIMENT CONTROL BMPS MUST BE REMOVED.
<br />A.D.CLEAN OUT SEDIMENT FROM CONVEYANCE SYSTEMS AND
<br />PERMANENT STORMWATER TREATMENT SYSTEMS (RETURN TO
<br />DESIGN CAPACITY).
<br />15. INSPECTIONS
<br />A.INITIAL INSPECTION FOLLOWING SILT FENCE INSTALLATION BY CITY
<br />REPRESENTATIVE IS REQUIRED.
<br />B.EXPOSED SOIL AREAS: ONCE EVERY 7 DAYS AND WITHIN 24 HOURS
<br />FOLLOWING A 0.5" OVER 24 HOUR RAIN EVENT.
<br />C.STABILIZED AREAS: ONCE EVERY 30 DAYS
<br />D.FROZEN GROUND: AS SOON AS RUNOFF OCCURS OR PRIOR TO
<br />RESUMING
<br />CONSTRUCTION.
<br />E.INSPECTION AND MAINTENANCE RECORDS MUST BE RETAINED FOR 3
<br />YEARS AFTER FILING OF THE NOTICE OF TERMINATION AND MUST
<br />INCLUDE: DATE AND TIME OF ACTION, NAME OF PERSON(S)
<br />CONDUCTING WORK, FINDING OF INSPECTIONS AND
<br />RECOMMENDATIONS FOR CORRECTIVE ACTION, DATE AND AMOUNT
<br />OF RAINFALL EVENTS GREATER THAN 0.5 INCHES IN A 24 HOUR
<br />PERIOD.
<br />F.OBSERVE ANY DISCHARGE OCCURRING ONSITE AND DOCUMENT
<br />CORRECTIVE ACTIONS TAKEN. DISCHARGE SHOULD BE DESCRIBED AND
<br />PHOTOGRAPHED.
<br />16. MINIMUM MAINTENANCE
<br />A.ALL NONFUNCTIONAL BMPS MUST BE REPAIRED, REPLACED, OR
<br />SUPPLEMENTED WITH FUNCTIONAL BMPS BY THE END OF THE NEXT
<br />BUSINESS DAY AFTER DISCOVERY OR AS SOON AS FIELD CONDITIONS
<br />ALLOW.
<br />B.SILT FENCE TO BE REPAIRED, REPLACED, SUPPLEMENTED WHEN
<br />NONFUNCTIONAL, OR 1/3 FULL; WITHIN 24 HOURS
<br />C.SEDIMENT BASINS DRAINED AND SEDIMENT REMOVED WHEN REACHES
<br />1/2 STORAGE VOLUME.
<br />D.SEDIMENT REMOVED FROM SURFACE WATERS WITHIN (7)SEVEN DAYS
<br />E.CONSTRUCTION SITE EXITS INSPECTED, TRACKED SEDIMENT REMOVED
<br />WITH 24 HOURS.
<br />F.PROVIDE COPIES OF EROSION INSPECTION RESULTS TO CITY ENGINEER
<br />FOR ALL EVENTS GREATER THAN 12" IN 24 HOURS
<br />17.THE SWPPP, INCLUDING ALL CHANGES TO IT, AND INSPECTIONS AND
<br />MAINTENANCE RECORDS MUST BE KEPT AT THE SITE DURING
<br />CONSTRUCTION ACTIVITY BY THE PERMITTEE(S) WHO HAVE OPERATIONAL
<br />CONTROL OF THE SITE.
<br />18.OWNER MUST KEEP RECORDS OF ALL PERMITS REQUIRED FOR THE PROJECT,
<br />THE SWPPP, ALL INSPECTIONS AND MAINTENANCE, PERMANENT OPERATION
<br />AND MAINTENANCE AGREEMENTS, AND REQUIRED CALCULATIONS FOR
<br />TEMPORARY AND PERMANENT STORM WATER MANAGEMENT SYSTEMS.
<br />THESE RECORDS MUST BE RETAINED FOR THREE YEARS AFTER FILING NPDES
<br />NOTICE OF TERMINATION.
<br />19.SWPPP MUST BE AMENDED WHEN:
<br />A.THERE IS A CHANGE IN DESIGN, OPERATION, MAINTENANCE, WEATHER
<br />OR SEASONAL CONDITIONS THAT HAS A SIGNIFICANT EFFECT ON
<br />DISCHARGE
<br />B.INSPECTIONS INDICATE THAT THE SWPPP IS NOT EFFECTIVE AND
<br />DISCHARGE IS EXCEEDING WATER QUALITY STANDARDS.
<br />C.THE BMP'S IN THE SWPPP ARE NOT CONTROLLING POLLUTANTS IN
<br />DISCHARGES OR IS NOT CONSISTENT WITH THE TERMS AND
<br />CONDITIONS OF THE PERMIT.
<br />19.CONCRETE WASHOUT AREA
<br />A.CONTRACTOR TO PROVIDE PREFABRICATED CONCRETE WASH-OUT
<br />CONTAINER WITH RAIN PROTECTION PER PLAN.
<br />B.CONCRETE WASH-OUT TO BE IDENTIFIED WITH SIGNAGE STATING
<br />"CONCRETE WASHOUT AREA DO NOT OVERFILL".
<br />C.CONCRETE WASHOUT WATER NEEDS TO BE PUMPED WITHIN 24
<br />HOURS OF STANDING WATER IN WASHOUT AREA.
<br />20.IN THE EVENT OF ENCOUNTERING A WELL OR SPRING DURING
<br />CONSTRUCTION CONTRACTOR TO CEASE CONSTRUCTION ACTIVITY AND
<br />NOTIFY ENGINEER.
<br />21.PIPE OULTETS MUST BE PROVIDED WITH TEMPORARY OR PERMANENT
<br />ENERGY DISSIPATION WITHIN 24 HOURS AFTER CONNECTION TO A SURFACE
<br />WATER.
<br />22.FINAL STABILIZATION
<br />FINAL STABILIZATION REQUIRES THAT ALL SOIL DISTURBING ACVTIVITIES
<br />HAVE BEEN COMPLETED AND THAT DISTURBED AREAS ARE STABILIZED BY A
<br />UNIFORM PERENNIAL VEGETATIVE COVER WITH 70% OF THE EXPECTED FINAL
<br />DENSITY, AND THAT ALL PERMANENT PAVEMENTS HAVE BEEN INSTALLED.
<br />ALL TEMPORARY BMP'S SHALL BE REMOVED, DITCHES STABILIZED, AND
<br />SEDIMENT SHALL BE REMOVED FROM PERMANENT CONVEYANCES AND
<br />SEDIMENTATION BASINS IN ORDER TO RETURN THE POND TO DESIGN
<br />CAPACITY.
<br />23.RESPONSIBILITIES
<br />A.THE OWNER MUST IDENTIFY A PERSON WHO WILL OVERSEE THE SWPPP
<br />IMPLEMENTATION AND THE PERSON RESPONSIBLE FOR INSPECTION
<br />AND MAINTENANCE:
<br />CONTACT: __________________________________
<br /> COMPANY: __________________________________
<br />PHONE: __________________________________
<br />B.THE OWNER MUST IDENTIFY THE A PERSON WHO WILL BE RESPONSIBLE
<br />FOR LONG TERM OPERATIONS AND MAINTENANCE OF THE
<br />PERMANENT STORMWATER MANAGEMENT SYSTEM:
<br />CONTACT:__________________________________
<br />COMPANY: __________________________________
<br />PHONE: __________________________________
<br />24.THE WATERSHED DISTRICT OR THE CITY MAY HAVE REQUIREMENTS FOR
<br />INSPECTIONS OR AS-BUILT DRAWINGS VERIFYING PROPER CONSTRUCTION
<br />OF THE BMPS.
<br />*
<br />PROJECT SITE
<br />1 MILE BUFFER
<br />*
<br />PROJECT SITE
<br />1
<br />EROSION CONTROL BLANKET
<br />6"
<br />6"
<br />1' TO 3'ANCHOR TRENCH
<br />1.DIG 6"X6" TRENCH
<br />2.LAY BLANKETS IN TRENCH
<br />3.STAPLE AT 1.5' INTERVALS
<br />4.BACKFILL WITH NATURAL SOIL
<br />AND COMPACT.
<br />5.BLANKET LENGTH SHALL NOT
<br />EXCEED 100' WITHOUT AN
<br />ANCHOR TRENCH
<br />NOTE:
<br />SLOPE SURFACE SHALL BE FREE OF ROCKS, SOIL
<br />CLUMPS, STICKS, VEHICLE IMPRINTS, AND GRASS.
<br />BLANKETS SHALL HAVE GOOD SOIL CONTACT.
<br />ANCHOR TRENCH
<br />(SEE DETAIL AND NOTES BELOW)
<br />OVERLAP END JOINTS MINIMUM
<br />OF 6" AND STAPLE OVERLAP AT
<br />1.5' INTERVALS.
<br />OVERLAP LONGITUDINAL
<br />JOINTS MINIMUM OF 6"
<br />STAPLE PATTERN/DENSITY
<br />SHALL FOLLOW
<br />MANUFACTURERS
<br />SPECIFICATIONS.
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<br />STAGGER JOINTS
<br />DRAWN 2/2016
<br />LOUCKS PLATE NO.
<br />3016LOUCKSBIO-ROLL OR
<br />ROCK LOG
<br />NOTES:
<br />1.PLACE BOTTOM EDGE OF WIRE FENCE INTO 6 IN DEEP TRENCH.
<br />2.POSTS SHALL BE:
<br />·6 FT MAX. SPACING.
<br />·STANDARD STEEL T-TYPE POSTS.
<br />·5' MIN. LENGTH POSTS, DRIVEN 2 FT INTO THE GROUND.
<br />3.ATTACH WIRE FENCE TO STEEL POSTS WITH NO. 9 GA. ALUMINUM WIRE OR NO. 9
<br />GALVANIZED STEEL PRE-FORMED CLIPS.
<br />4.ATTACH FABRIC TO WIRE FENCING WITH WIRE OR ZIP TIES. A MIN. OF 3 ZIP TIES
<br />PER POST. EXTEND BOTTOM OF FABRIC INTO TRENCH.
<br />5.BACKFILL TRENCH & COMPACT.
<br />6.STRAW, WOOD CHIP, COMPOST OR ROCK LOGS PER MNDOT SPECS 3890, 3897.
<br />DRAWN 11/2016
<br />LOUCKS PLATE NO.
<br />3002LOUCKS
<br />2'' X 2'' X 18'' LONG WOODEN
<br />STAKES AT 2'-0'' SPACING. DRIVE
<br />THROUGH NETTING, NOT
<br />PENETRATING FIBER LOG.
<br />STRAW OR WOOD FIBER 9"
<br />OR 12'' DIA. SEDIMENT
<br />LOG ROLL ENCLOSED IN
<br />POLYPROPYLENE NETTING
<br />FL
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<br />TRENCH IF LOOSE SOILS
<br />FLOW
<br />ENDS SECURELY CLOSED TO PREVENT
<br />LOSS OF OPEN GRADED AGGREGATE
<br />FILL. SECURED WITH 50 PSI. ZIP TIE
<br />1
<br />NOTES:
<br />SEE SPECS. 2573, 3137, 3890 & 3897.
<br />MANUFACTURED ALTERNATIVES LISTED ON Mn/DOT'S APPROVED
<br />PRODUCTS LIST MAY BE SUBSTITUTED.
<br />1.GEOTEXTILE SOCK BETWEEN 4-10 FEET LONG AND 4-6 INCH
<br />DIAMETER. SEAM TO BE JOINED BY TWO ROWS OF STITCHING
<br />WITH A PLASTIC MESH BACKING OR PROVIDE A HEAT BONDED
<br />SEAM (OR APPROVED EQUIVALENT). FILL ROCK LOG WITH
<br />OPEN GRADED AGGREGATE CONSISTING OF SOUND
<br />DURABLE PARTICLES OF COARSE AGGREGATE CONFORMING
<br />TO SPEC. 3137 TABLE 3137-1; CA-3 GRADATION.
<br />2 3
<br />4
<br />5 6
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