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HomeMy WebLinkAboutResolution No. 023-06 777, c' 0913, RESOLUTION BE IT RESOLVED by the Common Council of the City of Rochester that the City adopt a policy requiring the use and submittal of the three grading plan checklists (Single Residential Lot Grading Plan Checklist, Permanent Storm Water Management,Plan Checklist, and Subdivision and Non-Residential Lot Grading Plan Checklist) as an aid in the grading plan permit review and " approval process. A copy of the checklists is attached. PASSED AND ADOPTED BY THE COMMON COUNCIL OF THE CITY OF ROCHESTER, MINNESOTA, THIS �kV DAY OF , 2006. z., C ^i PRESIDENT OF SAID COMMON COUNCIL ATTEST: CITY CLERK APPROVED THIS DAY OF �� , 2006. • MAYOR OF SAID CITY (Seal of the City of Rochester, Minnesota) Res05\PW1Adopt.Grading PlanGhecklists.06 i • • . *- SINGLE RESIDENTIAL LOT . GRADING PLAN CHECKLIST revised January 2006 'y�MVeSp'rA KEY Site: ❑✓ =Yes N=No Prepared By: Date: Blank Not Applicable Reviewed By: Date: GENERAL ❑ Areas within 200'of surface water seeding scheduled ® Completed grading permit application form. within maximum time allowed. Owner name(s)and address(es)listed on Grading Plan. ❑ Steeper than 3:1—7 days: ❑ Plan is 1"=50' or larger scale. North arrow shown. H 10:1 to 3:1—14 days. Plan is drawn in two-foot contours. 'All contours are Flatter than 10:1—21 days. labeled. Or many spot elev.and arrows alternative. Maximum unbroken 3:1 or steeper slope of 75 feet horz. Existing contours are dashed and proposed are solid. H Temporary or permanent cover is indicated for all Directional arrows are shown for proposed drainage. disturbed areas. Temporary seeding specifies seed mix Details of terrain and drainage are provided for areas and includes disk anchored mulch on all slopes longer adjacent to the proposed grading. than 200'or >5%. Permanent cover specifies 4"topsoil, ® Existing public and private utilities are shown. seed mix and disk anchored mulch,or 4"topsoil and sod. Property limits are shown. Streets are labeled.Lot& ❑ Slopes in excess of 4:1 and 4:1 slopes longer than 30'are block information. Street address shown,if unknown. seeded and protected with erosion control blankets or H Schedule of BMP installation shown. sodded and staked. Blanket category specified per BMP details included. Mn/DOT 3885.1. Plan depicts required blanket locations. SITE GRADING,SEDIMENT&EROSION CONTROL ❑ For sites where temporary or permanent cover will not be • Down-slope sediment control scheduled before grading. complete by November 15,plan indicates adequate Adjacent property protected from drainage and sediment. measures to control spring erosion&sedimentation. Stabilized vehicle exit(s)are provided,minimize number, DRAINAGE SWALES&EASEMENTS All storm sewer inlets,existing and proposed include Drainage easements are shown and labeled on the plan. temporary sediment control&control remains until up- Drainage easements are provided where concentrated slope sources stabilized. flow is received from more than 1 adjacent lot and also. ❑ Temporary stockpiles_include additional silt fence or where concentrated flow is received from more than 1 other sediment control. acre of adjacent property. 100-year flow in easement. ® Percent of slope is shown for drainage swales. ❑ Minimum drainage easements for flows from I acre or Fill&cut property line setbacks are>2' for cut slope ht. less or 4 lots or less are a minimum of 15'wide. Ditch is >10'or fill slope ht.>4'and setback is dimensioned on the 1.9'deep V-shaped with 4:1 slopes. plans, ❑ Minimum drainage easements for flows from more than 1 RAll proposed lot corner elevations are shown. acre or more than 4 lots are a minimum of 20'wide. Proposed elevations of garage and lowest floor,ground at Ditch is a minimum of 2'deep with a 4'bottom and 4:1 front and rear of building,along with the structure type slopes up to the easement line. 100-year runoff contained are indicated on.the plan. in easement. Top of foundation is min.6"from the ground. ❑ Easement documents are signed and submitted to Public Grade 1'below top of foundation 10'from building. Works with recording fee or included in plat. Drainage flows away from structures at min.2%: Control elevations for drainage ways are provided. Freeboard to structures. Floor el.or the grade adjacent to Minimum slope of small drainage swales is 2%. the building is at least 1'above any overflow elevation, Drainage easements for flow from more than 1 acre or 4 and at least 2'above any pond 100-year water level, lots are seeded and protected with erosion control whichever is greater and min. 1'above FEMA flood el. blankets or sodded. Blanket category specified per ❑ Minimum lot slopes for vegetated areas are 2%minimum. Mn/DOT 3885.1. Plan depicts required blanket locations. ❑ .Ditches stabilized within 24 hours of connection to surface water or outlet. *As a reference document see • http://www.pca.state.mn.us/water/stoimwater/index.html „.ROCHFSTFA i • a;Y ^_ PERMANENT STORM WATER MANAGEMENT A` PLAN CHECKLIST. revised January 2006 KEY Site:—- ❑✓ =Yes Prepared By: Date: ❑x =No Blank=Not Applicable Reviewed By: Date: GENERAL STORM DRAIN SYSTEM,INLETS,&'OVERFLOWS 0 Size of the drainage area served shown: ❑ All apron elevations(inlets and outlets)are labeled. Area • Total project area and total impervious surface areas inlet elevations are labeled. Pipe sizes are labeled. of project. H 400'max.manhole spacing for lines 15”diameter or less. • Total estimated impervious surface areas of ultimate 500'max.manhole spacing for lines 18"to 30"diameter. development. Flow direction change is<_90°at junctions. ❑ Final plan is signed by a licensed professional. Apron inlets to the storm sewer include trash racks. .HOwner name(s)and address(es)listed. Trash racks on inlet structures in wooded areas designed Plan is 1"=50'or larger scale. North arrow shown. assuming a minimum of 50%plugging condition. ❑ Plan is drawn in two-foot contours. All finished contours and adequate existing contours are labeled. OUTLETS&ENERGY DISSIPATION Existing contours are dashed and proposed are solid. Existing public and private utilities are shown. ❑ Discharge direction of flow generally 45 degrees or less Soil types shown(in drainage report). to the flow direction of receiving ditch or stream. ❑ 'Areas not to be disturbed clearly defined. ❑ Discharges to rear property lines shall generally be piped • ❑ ALL receiving waters,including wetland,within''/x mile to at least the rear property line. shown or identified. ❑ Where discharge pipe velocities are 10 fps or less,riprap ❑ Temporary stockpiles include silt fence or other sediment and filter volumes are indicated in accordance with control Mn/DOT Standard Plate. ❑ Property limits are shown. Streets are labeled.Lot& ❑ Where discharge pipe velocities are greater than 10 fps, block information shown if platted. Street address shown energy dissipater is provided along with riprap and filter. if unplatted. ❑ Discharges on slopes steeper than 10%shall not be Drainage easements are shown and labeled on the plan. allowed unless discharge is into existing drainage ditch Storm water management areas are platted as outlots. A and volume of water in ditch is not greater than 110%of facility that will serve only the lot on which it.is located the pre-developed condition. may simply be a drainage easement on that lot. ❑ Pipe outlet energy dissipation complete within 24 hours of ❑ Schedule of BMP installation shown.,. connection to surface water or outlet. ❑ Evaluation of downstream adequacy provided capacity& DRAINAGE SWALES&EASEMENTS stability). ❑ Control elevations for drainage ways are provided. 100= year flow contained in easement TEMPORARY SEDIMENT BASINS Minimum slope of drainage swales is 2%. Drainage easements are seeded and protected with erosion ❑ Sized to store 2-year,24-hr storm from the drainage area control blankets or they are sodded where concentrated below the outlet pipe(no smaller than 1800 cf/acre of flow from more than 1 acre or 4 lots is directed. Blanket drainage area),or category specified per Mn/DOT 3885.1: Plan depicts Sized at 3,600 cf/acre of drainage area. required blanket locations. Designed to minimize short-circuiting. ❑ Velocity computations are provided for drainage Floating debris discharge prevented. easements where concentrated flow from more than 2 Designed for full dewatering. acres or 8 lots is directed.Where 10-year velocities H Energy dissipation on outlet pipe. exceed 5 tt/sec,permanent turf reinforcement mats are Principal and emergency spillway designed per BMP installed per City std.plate 7-05.Blanket per Mn/DOT storm frequency standards. 3888.2A2 or manufacturer and product is specified. Plan ❑ Fenced if slopes exceed 4:1 per city detail. depicts blanket locations and cross sections. ❑ Plan requires any permanent or temporary sediment ponds • ❑ Easement documents are signed and submitted to Public to be constructed at the beginning of construction. Works with a check for recording if not included in plat. ❑ Ditches stabilized within 24 hours of connection to surface water or outlet. PERMANENT PONDS INFILTRATION/FILTRATION • Entire drainage/service area shown(in drainage report). ❑ Type(s)used. 50 scale or larger grading plan.with pond cross section. Infiltration basins Where possible,provide a forebay at the inlet;locate inlet Infiltration I trenches. and outlet at opposite ends of pond;and provide length to Rain gardens. width ratio>3. Sand filters. RMulti-cell design where practical. Organic filters. 10:1 bench is provided for first 1 foot of depth below Bioretention. normal water elevation. Natural depressions(wetland not included) ❑ 4:1 max slope from normal water elevation to 100-year Other water elevation. ❑ Floatables removed before infiltration/filtration system. 3:1 max slope below normal water elevation. ❑ Site sensitivity analysis included Pond depth is 4 to 10 feet based on normal water level. H Evaluation of hydrologic impact included. Normal water elevation is shown. Infiltration scheduled after full site development and 100-year high water level is shown. stabilization. Inlets are at or below normal water level. ❑ Runoff route away from infiltration system during Outlet is designed to,prevent short-circuiting and construction. discharge of floating debris. ❑ Site controlled to minimize soil compaction. H Permanent pool volume 1800 cf per acre drained. ❑ Pretreatment sediment removal included. Use appropriate Water quality volume equal to ''/2,inch runoff total checklist area. impervious surface area,at ultimate development. ❑ Designed for%inch of runoff from total impervious ❑ Outlet size to discharge no more than 5.66 cfs/acre of surface areas for ultimate development within 48 hours. pond surface. System bypass for flows that cannot be filtered. HEnergy dissipation on outlet piping. H Minimum vertical separation of 3 feet between seasonal Areas less than 1 acre not draining to pond: high ground water and bottom of infiltration system. HGrassed swales. ❑ Soil test results,system capacity calculations,and Small ponds. computer modeling results included.. ❑ Grit chambers. ❑ Minimum 10'width maintenance access provided. ❑ Other ❑ Infiltration systems not permitted for vehicle fueling or ❑ Emergency overflow spillway is provided to - service areas: accommodate 100-year event.High point elevation and direction of overflow are marked on plans. ALTERNATIVE AND COMBINED PRACTICES ❑ Emergency overflow spillway is located to protect Combined practice(narrative in drainage report). adjacent property and large fill sections. H Alternative practice(narrative in drainage report). ❑ 100-year runoff which is designed to flow to the pond ❑ Full calculations and plans included(narrative in drainage does not bypass the pond;unmodeled 100-year flow does report). not enter the pond. ® Minimum 10'width at top of dam(if dam is<15'high). 12'wide access and turn-around area for maintenance. vehicles is shown on a slope 5 15%,cross slope S 6%. ❑ Pond access is included in a min. 15'wide portion of the pond outlot.If access is in an easement across private property,a 12'wide paved access road is provided. ❑ Seed mix Mn/DOT 310 for a 10'perimeter around the pond. Seed mix Mn/DOT 350 for the remainder of the pond outlot. ❑ DNR dam safety permit obtained if dam height is>6'and storage.to top of dam is> 15 acre-ft. * As a reference document see http://www.pca.state.mn.us/water/Stormwater/index.html • i ROC ESTER . r=`• :,. SUBDIVISION AND NON-RESIDENTIAL LOT GRADING PLAN CHECKLIST. revised January 2006 �ivn. cotA KEY Site: ❑✓ =Yes Prepared By: Date: ❑x =No Blank=Not Applicable Reviewed By: Date: GENERAL ❑ Temporary stockpiles include additional silt fence or NPDES permit including SWWWP is referred to on plan other sediment control. Completed grading permit application form. Percent of slope is shown for streets and drainage swales. Final grading plan is signed by a licensed professional,5 v Fill&cut property line setbacks are>2' for cut slope ht. copies. One copy of other documentation. >10'or fill slope ht.>4'and setback is dimensioned on the ❑ Owner name(s)and address(es)listed on Grading Plan. plans. Plan is 1"=50' or larger scale. North arrow shown. All proposed lot corner elevations are shown. Plan is drawn in two-foot contours. All finished contours Proposed elevations of garage and lowest floor,ground at and adequate existing contours are labeled. front and rear of building,along with the structure type Existing contours are dashed and proposed are solid, are indicated on the plan. Directional arrows are shown for proposed drainage. Top of foundation is min.6"from the ground. Details of terrain and drainage are provided for areas Grade V below top of foundation 10' from building. adjacent to the proposed grading. Freeboard to structures. Floor el,or the grade adjacent to Existing public and private utilities are shown. the building is at least 1'above any overflow elevation, Boundaries of drainage areas shown.(in drainage report) and at least 2'above any pond 100-year water level, Soil types shown(in drainage report). whichever is greater and min. V above FEMA flood el. Areas not to be disturbed clearly defined. ❑ Drainage flows away from structures at min.2%. ALL receiving waters,including wetland,within'/Z mile ❑ Temporary or permanent diversion swales,stabilized with shown or identified. turf mat,pipe,riprap,are used at the top of slopes ❑ Property limits are shown. Streets are labeled.Lot& exceeding 4:1,when applicable. block information. Street address shown,if unknown. Minimum lot slopes for vegetated areas are 2%minimum. Proposed walk is shown for commercial/industrial sites. Areas within 200'of surface water seeding scheduled County or Mn/DOT permit obtained for work their ROW. within maximum time allowed. Substantial Land Alteration approved for elevation Steeper than 3:1—7 days. changes>-10'or other criteria that require a SLA. 10:1 to 3:1-14 days. Any City Council approval conditions are met. Flatter than 10:1 21 days. The following areas are tabulated for residential(acres): ❑ Temporary or permanent cover is indicated for all • Total platted area(site area) disturbed areas. Temporary seeding specifies seed mix • Total area disturbed including disk anchored mulch on all slopes>200'or> • Total developable area for residential(exclude 5%. Permanent cover specifies 4"min.topsoil,seed mix floodway,natural steep slopes,wetlands). and disk anchored mulch,or 4"min.topsoil and sod. ❑ The following areas are tabulated for non-residential ❑ Slopes steeper than 4:1 and 4:1 slopes longer than 30'are (acres): seeded and protected with erosion control blankets or • Total project area sodded and staked. Blanket category specified per • Total impervious areas of project,existing& Mn/DOT 3885.1. Plan depicts required blanket locations. ❑ Statement that slopes steeper than 4:1 are stable from proposed. land-sliding and surface erosion. Geotechnical report for • Tabulation of total and impervious area by tax parcel. slopes>3:1. Schedule of BMP installation shown. ❑ For sites where temporary or permanent cover will not be BMP details included. complete by November 15,plan indicates adequate Dewatering activities discharge to sediment basin. measures to control spring erosion&sedimentation. SITE GRADING,SEDIMENT&EROSION CONTROL DRAINAGE SWALES&EASEMENTS Down-slope sediment control scheduled before grading. R Drainage easements are shown and labeled on the plan. Adjacent property protected from drainage and sediment. Drainage easements are provided where concentrated'' Stabilized vehicle exit(s)are provided,minimize number. flow is received from more than 1 adjacent lot and also concentrated flow areas is"high flow,heavvyy duty"type. . Silt fences are provided per BMP Manual In where concentrated flow is received from more than 1 d acre of adjacent property, 100-year flow contained in ❑ All storm sewer inlets,existing and proposed include easement. temporary sediment control&control remains until up- ❑ Minimum.drainage easements for flows from 1 acre or slope sources stabilized. less or 4 lots or less are a minimum of 15'wide. Ditch is ❑ Maximum unbroken 3:1 or steeper slope of 75 feet horz. 1.9'deep V-shaped with 4:1 slopes. r ' [] Minimum drainage easements for flows from more than 1 ❑ Overflow swales are provided which limit the depth of • acre or more than 4 lots are a minimum of 20'wide. ponding in the street to 2'or less. Ditch is a minimum of 2'deep with a 4'bottom and 4:1 ❑ Emergency overflow with the high point.elevation and slopes up to the easement line. 100-year runoff contained direction of overflow are clearly marked on plans. in easement. ❑ Emergency overflow swale meets minimum drainage Control elevations for drainage ways are provided. easement standards noted above. Minimum slope of small drainage swales is 2%. OUTLETS&ENERGY DISSIPATION . Drainage easements for flow from more than 1 acre or 4 ❑ Discharge direction of flow generally 45 degrees or less lots are seeded and protected with erosion control to the flow direction of receiving ditch or stream. blankets or sodded. Blanket category specified per ❑ Discharges to rear property lines shall generally be piped Mr/DOT 3885.1.'Plan depicts required blanket locations. to at least the rear property line. ❑ Velocity computations are provided for drainage ❑ Where discharge pipe velocities are.10 fps or less,riprap easements where concentrated flow from more than 2 and filter volumes are indicated in accordance with acres or 8 lots is directed.Where 10-year velocities Mn/DOT Standard Plate. exceed 5 ft/sec,permanent turf reinforcement mats are ❑ Where discharge pipe velocities are greater than 10 fps, installed per City std.plate 7-05.Blanket per Mn/DOT energy dissipater is provided along with riprap and filter. 3888.2A2 or manufacturer and product is specified. Plan ❑ Discharges on slopes steeper than 10%shall not be depicts blanket locations and cross sections. allowed unless discharge is into existing drainage ditch ❑ Easement documents are signed and submitted to Public and volume of water in ditch is not greater than 110%of Works with recording fee or included in plat. the pre-developed condition. ❑ Ditches stabilized within 24 hours of connection to ❑ Pipe outlet energy dissipation complete within 24 hours of . surface water or outlet: connection to surface water or outlet. STORM DRAIN SYSTEM,INLETS,&OVERFLOWS ❑ Evaluation of downstream adequacy provided(capacity& ❑ All apron elevations(inlets and outlets)are labeled. Area stability). inlet elevations are labeled. Pipe sizes are labeled. TEMPORARY SEDIMENT BASINS 400'max.manhole spacing for lines 15"diameter or less. ❑ Temporary sediment basin provided or provisions for the 500'max.manhole spacing for lines 18"to 30"diameter. use of existing City facilities. Drainage from subdrains,sump pumps,and building ❑ Sized to below the 2-year, -y a , 4-hr storm smaller thaom the n 1 00 cf/inag6cre area storm drains does not flow through public CB's. pipe ❑ Not more than 3 CB's in a series(at an intersection) drainage area),or. before connecting to the storm sewer main. Sized at 3,600 cf/acre of drainage area. ❑ Storm sewer main generally does not flow through CB's. Designed to minimize short-circuiting. Flow direction change is S 90°at junctions. Floating debris discharge prevented. Drainage does not cross intersections(no valley gutters). Designed for full dewatering. CB spacing as necessary for inlet capacity,curb spread, Energy dissipation on outlet pipe. and not exceeding 1000'on residential streets or 600'on Principal and emergency spillway designed per BMP collector and arterial streets. storm frequency standards. RApron inlets to the storm sewer include trash Fenced if sloes exceed 4:1 per City detail.racks. p Trash racks on inlet structures in wooded areas designed Plan requires any permanent or temporary sediment ponds assuming a minimum of 50%plugging condition. to be constructed at the beginning of construction. ❑ For other than R1 &R2,drainage from impervious ❑ For areas draining less than 10 areas alternative sediment surfaces is collected on-site and not sheet drained onto control. sidewalks,rights of way or adjacent property. Multiple lines of silt,fence. ❑ Concentrated drainage is collected in CB before crossing Small basins walk. Vegetative strips(full permanent vegetation before upslope excavation). *As a reference document see http://www.pca.state.mn.us/water/stormwater/index.htmi