7.8. SR 07-17-2017 - Laserfiche WebLink

Home Browse Search

GENERAL INFORMATION This Storm..ter Pollution Prevention Pl.n is prepared in rordonce to the Notional Pollutant Disch.rgs Elimination System Permits No. AN R1000D01 for storm water discharges o cited with ronsiruc lion activity. Project Nome: THE PINES AT ELK RIVER P.U.D. Location: 183RD CIRCLE NW, Elk River, MN. City: Elk River, AN Lot/Long: 45.3040/-93.5498 THECr'atiES of Construction Activity THE PINES AT ELK RIVER P.U.D. tonsisis of grotling, utilities, ate hose and bituminous surfacing, storm water management, and turf turf establishment. PROJECT CONTACTS Washington e glon Street Investors ontl the Contractor or responsible for implement of the SWPPP and the insl"Il.tion, inspection, and ointenonce of the er n prevention and sediment control BMP's before ontl during constgluction. ENGINEER and SWPPP DESIGNER (Exp 2018): Jeff Swanson Bogart, Pederson & Associates 13076 First Street Becker, MN 53308-9322 (763) 262-8822 CONTRACTOR: Not yet identified DESIGN CALCULATIONS: See drainage calculations. Provided by Bogart, Pederson & Assoc. Design calculations include soil types over the site. NARRATIVE Description of Construction Activity. THE PINES AT ELK RIVER P.U.D. consists of grading, utilities, aggregate base and bituminous surfacing, stormwoter management, and turf establishment. Project Duration: Anticipated 90 Days Potential Dischorges: Sediment resulting from construction operations. Are. to be Disturbed: 5.0 Acres Pre—Construction Impervious Area: 0.0 Acres Post Construction Imaervi"us Area: 1.71 Acres New Impervious Area: 1.71 Acres RECEIVING WATERS Receiving Waters Within One Mile: Troll Brook is not o special or impoiretl water Mississippi River is o special and on impaired water PLANS AND SPECIFICATIONS Theplan sheets of this plan set indicate the following items: The project location and construction limits. Existing and final grades. Tributory are. dividing lines and direction of 71D. for all pre an at post—construction stormwoter runoff drainage or provitletl in the dr—age role ul.lions. Drainage calculations are provided upan rson request by BeBogart, Ped & Assoc. Locations of impervious surfaces. Locations of areas not to be disturbed (e.g., buffer zones, wetlontls, etc.). Steep slope locations. Loco ions of all temporary and permanent erosion and sediment control BMP's to be installed on the project. The detail sheets indicate erosion and sediment Control BMPS to be installed on the P roject. Estimated quantities "(Dre ontl sediment control features for this project ore indicated in the plans ontl in the bid proposal form D1 the Project Manual. I. Infiltration area shall be staked off during construction to restrict heavy equipment troffic from compacting native soils. 2. Install appropriate temporary erosionControl devices to prevent sediment from leaving or entering the pr.ctice during construction. 3. Construct and vegetate bioretenti.n device following stabilization of contributing tlroinoge are.. 4. Grading of the infiltration basin shall be accomplished using IDw—impost earth—moving equipment to prevent compos lion of the underlying soils. Small hacked dozers and bobcats with runner tracks are recommended. 5. Excovole the infiltration basin to the specified depth (elevation). It is recommended that all sub material below the specified elevation shall be undisturbed. 5. In the event that sediment is introduced into the bmp during or immediately following ovation, this material shall be removed from the practice prior to continuing construction. 7. Remove temporary erosion control devices after the contributing drainage are. is .tlequ.tely vegel.ted. Down gradient silt fence ontl sediment log installations are to be inplace prior to the cam mentem enc of any earthwork operations. Topsoil is to be windrowed "long the construction limits and placed os slope dressing immediately following completion of the grading operations, os the grading operations proceed. Topsoil placement along the embankment slopes though the wetlontls are. is to be spread by o low impact c ..ler tractor operating up and down the slopes so as to provide track prints parallel with the contours. Installation of Mn/DOT Category 3 Erosion Control Blanket along the embankment Slopes adjacent the wetlontls are.. All temporary soils stockpiles will require an effective m of sediment control such o n erosion control Dl.nkel Lovering or silt fenced nstallation along the toe of slope. a All completed ditch slopes and bottoms not draining towards the wetlontls area ore to be stabilized within 7 days. Temporary stabilization will be required in are.. here grading operations are suspended or ceased for o period of 7 day. or greater. A rock construction entrance for sediment control is to be provided .t the project drive..ys. Street s eeping of the paved surfaces will be required as directed by the Engineer. Tracked sediments must be removed from II paved surfaces, adjacent roodwoys, and other off—site areas within 24 hours of discovery. TIMING EROSION CONTROL Silt fence will be installed prior to construction Riprop and tiller blanket will be placed at the outlets within 24 hours of the outlet placement. The contractor must stabilize the all exposed soil areas mediately following construction wherever Construction will not occur for o period greater than or equal to 7 days. Stabilization work must be complete within 7 c.lender tloys after the construction work in that are. hos temporarily or permanently ce.sed. Arensthat o within 2DD ft o7 o Public Water must be stabilized within 24 hourrs of completing construction during periods of "Work in water rest riclions" for time periods declared by the DNR. The Contractor is esponsible to maintain the disturbed .re. until vegetation in established. Once vegetation is established and construction is complete, the silt fence and any other temporary erosion control that is not biodegradable shall be removed. Street sweeping 'Il be provided on as directed by the Owner The City may require the Owner to provide Street s eeping. If so the Sireet sweeping must occur within B hours of of notice from the City. Applying mulch, hydr.mul.h, t.ckifier, p.1y.cryl.mide or similar erosion prevention practices is not acceptable stabilization in any port of o temporary or permanent drainage ditch or ...Ie. INSPECTION AND MAINTENANCE ACTIVITIES The Contractor isto provide o trained intlivitluol responsible Tor the implementation, inspection and maintenance of the eros n ontl setlimenl control BMP on the project. That individual is to be identified at the pre—construction c onterence and listed in the minutes thereof. The appointed individual is to perform o routine inspection of the entire site .t least once every seven days during construction operations and within 24 hours otter o rainfall event greater than 0.5 inches in 24 hours. A recommended inspection form will be provided to the Contractor of the pr—construction conference. Any deficiencies in the erosion and sediment control BMPs are to be noted on the inspection form and corrected by the end of the next business day. Perimeter control devices are to be repaired or replaced when they are no longer effective or when the sediment reaches one—half the height of the device. POLLUTION PREVENTION Fertilizers are to be applied only in the amounts as specified and worked into the soil to minimize exposure to stormwoter runoff. Onsite refueling operations o e to be conducted with c Any inodvertenl spillage of to el or chemicals is to be immediately cleaned up, removed from the site ontl disposed of in accordance to State and Local Regulations. Major spills are to be reportedto the MPGA 24 Hour Notification network at 800 422 0798. All vehicles nsite o e to be monitored for leaks and subject to routine preventive maintenance efforts to reduce the likelihood of leakage and or spills. Portable sanitary waste facilities are to be provided onsite and emptied on o bi—weekly basis. Concrete botch trucks will not be .11—cl to discharge drum ontl chute ..shout directly on the ground. A portable ..shout receptacle is to be provitletl by the Contractor .t the location as provided by the Owner. FINAL STABILIZATION Final Stabilization Cc n o re when 70 percent of the pervious area is covered with uniform, permanent vegetation. All temporary erosion and sediment control features are to be removed and the NPDES Notice of Termination is to be prepared and submitted to the MPCA. LOCATION OF SWPPP REQUIREMENTS IN PROJECT PLAN DESCRIPTION TITLE LOCATION Erosion Control Details Erosion Control Details Sheet 6 Erosion Control Grading Plan Sheet 5 Locations 24 HOUR MPCA EMERGENCY NOTIFICATION Telephone Numbers: 651-649-5451 800-422-0798 Z 0, '3 W W C � a a_ F V "- cc z oa m.6 D J d Z v X M O W N � � w � W > z J d W r J Q W W W o Z Q d d z d LLJ r a k— to H U s N EEiO. / 7