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HomeMy WebLinkAboutResolution No. 129-10 ........... • 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 S DAY OF 4/21,0 , 2010. r PRESIDENT OF SAID COMMON COUNCIL ATTEST: CLYL CITYCILERKJ • APPR OVED THIS Ct �1 DAY OF 12010. 00,1000. MAYOR OF SAID CITY (Seal of the City of Rochester, Minnesota) ReS10\PW\Adopt.GradingPlanChecklists.10 • RnCHEST�c� SINGLE RESIDENTIAL LOT GRADING PLAN CHECKLIST revised March 2010 '�MvF 02� KEY Site: ©=Yes X❑=No Prepared By: Date: Blank=Not Applicable Reviewed By: Date: GENERAL ❑ Completed grading permit application form. ❑ All exposed soil stabilized in 14 days. ❑ Owner name(s)and address(es)listed on Grading Plan. ❑ Soil within 1 mile of impaired water-7 days. ❑ Plan is 1"=50'or larger scale. North arrow shown. ❑ Maximum unbroken 3:1 or steeper slope of 75 feet horz. ❑ Plan is drawn in two-foot contours. All contours are ❑ Temporary or permanent cover is indicated for all labeled. Or many spot elev.and arrows alternative. disturbed areas. Temporary seeding specifies seed mix ❑ Existing contours are dashed and proposed are solid. and includes disk anchored mulch on all slopes longer ❑ Directional arrows are shown for proposed drainage. than 200' or >5%. Permanent cover specifies 4"topsoil, ❑ Details of terrain and drainage are provided for areas seed mix and disk anchored mulch,or 4"topsoil and sod. adjacent to the proposed grading. ❑ Slopes in excess of 4:1 and 4:1 slopes longer than 30'are ❑ Existing public and private utilities are shown. seeded and protected with erosion control blankets or ❑ Property limits are shown. Streets are labeled.Lot& sodded and staked. Blanket category specified.per block information. Street address shown,if known. MrMOT 3885.1. Plan depicts required blanket locations. ❑ 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 ❑ Concrete washout management BMP addressed on plan. measures to control spring erosion&sedimentation. TE GRADING,SEDIMENT&EROSION CONTROL DRAINAGE SWALES&EASEMENTS Down-slope sediment control scheduled before c"adtmg. ❑ Drainage and Utility easements are shown and labeled on ❑ Adjacent property protected from drainage and sediment. the plan. ❑ Stabilized vehicle exit(s)are provided,minimise number. ❑ Drainage easements are provided where concentrated ❑ All storm sewer inlets,existing and proposed have inlet flow is received from more than 1 adjacent lot and also protection/temporary sediment control that remains until where concentrated flow is received from more than 1 up-slope areas are stabilized. acre of adjacent property. 100-year flow in easement. ❑ Temporary stockpiles include additional sediment control ❑ Minimum drainage easements for flows from 1 acre or and temporary cover after 14 days. less or 4 lots or less are a minimum of 15'wide. Ditch is ❑ Percent of slope is shown for drainage swales. 1.9' deep V-shaped with 4:1 slopes. ❑ Fill&cut property line setbacks are>2' for cut slope ht. ❑ Minimum drainage easements for flows from more than 1 >10' or fill slope ht.>4'and setback is dimensioned on the acre or more than 4 lots are a minimum of 20'wide. plans. Ditch is a minimum of 2' deep with a 4' bottom and 4:1 ❑ All proposed lot comer elevations are shown. slopes up to the easement line. 100-year ranoff contained ❑ Proposed elevations of garage and lowest floor,ground at in easement. front and rear of building,along with the structure type ❑ Easement documents are signed and submitted to Public are indicated on the plan. Works with recording fee or included in plat. ❑ Top of foundation is min.6"above the ground. ❑ Control elevations for drainage ways are provided. ❑ Grade l'below top of foundation 10'from building. ❑ Minimum slope of small drainage swales is 2%. Drainage flows away from structures at min.2%. ❑ Drainage easements for flow from more than 1 acre or 4 Freeboard to structures. Floor el.or the grade adjacent to lots are seeded and protected with erosion control the building is at least 1'above any overflow elevation, blankets or sodded. Blanket category specified per and at least 2' above any pond 100-year water level, Mn/DOT 3885.1. Plan depicts required blanket locations. whichever is greater and min. 1' above FEMA flood el. ❑ Ditches within 200' of surface water or Property line ❑ Minimum lot slopes for vegetated areas are 2%minimum. stabilized in 24 hrs after connection. •• As a reference document see http://www.pca.state.mn.us/water/stonnwater/index.html http://www.co.olmsted.mn.us/licenses/grading permit asp R°CRESTE.A PERMANENT STORM WATER MANAGEMENT • PLAN CHECKLIST revised March 2010 KEY Site: ❑✓ =Yes ❑X =No Prepared By: "ate: Blank=Not Applicable Reviewed By: Date: GENERAL ❑ Ditches within 200' e of surface water or Property line ❑ Size of the drainage area served shown: stabilized in 24 hrs after connection. • Total project area and total impervious surface areas STORM DRAIN SYSTEM,INLETS,& OVERFLOWS of project. • Total estimated impervious surface areas of ultimate ❑ All apron elevations(inlets and outlets)are labeled. Area development. inlet;CB,MH,elevations are labeled. Pipe sizes and ❑ Final plan is signed by a licensed professional. types are labeled. ❑ Submitted Signed Drainage Report per City Template ❑ 400'max.manhole spacing for lines 15"diameter or less. ❑ Owner name(s)and address(es)listed. ❑ 500'max.manhole spacing for lines 18"to 30"diameter. ❑ Plan is 1"=50' or larger scale. North arrow shown. ❑ Flow direction change is 5 90°at junctions. ❑ Plan is drawn in two-foot contours. All finished contours H Apron inlets to the storm sewer include trash racks. and adequate existing contours are labeled. Trash racks on inlet structures in wooded areas designed Existing contours are dashed and proposed are solid. assuming a minimum of 50%plugging condition. Existing public and private utilities are shown. ❑ Soil types shown(in drainage report). OUTLETS&ENERGY DISSIPATION ❑ Areas not to be disturbed clearly defined. ALL receiving waters,including wetlands,within 1 mile ❑ Discharge direction of flow generally 45 degrees or less shown or identified,including impaired waters. to the flow direction of receiving ditch or stream. b .,••t,uu vu�rawa�. ❑ Temporary stockpiles include additional sediment control ❑ Discharges to rear property lines shall generally be piped and temporary cover after 14 days.Y to at least the rear property line. ❑ Property limits are shown. Streets are labeled.Lot& ❑ Where discharge pipe velocities are 10 fps or less,riprap block information shown if platted. Street address shown and filter volumes are indicated in accordance with if unplatted. Mn/DOT Standard Plate. Drainage easements are shown and labeled on the plan. ❑ Where discharge pipe velocities are greater than 10 fps, Storm water management areas are platted as outlots. A energy dissipater is provided along with riprap and filter. facility that will serve only the lot on which it is located ❑ Discharges on slopes steeper than 10%shall not be may simply be a drainage easement on that lot. allowed unless discharge is into existing drainage ditch ❑ Schedule of BMP installation shown. and volume of water in ditch is not greater than 110%of the pre-developed condition. DRAINAGE SWALES&EASEMENTS ❑ Pipe outlet energy dissipation complete within 24 hours of ❑ Drainage and Utility easements are shown and labeled on connection to surface water or outlet. ❑ the plan. ❑ Evaluation of downstream adequacy provided(capacity& Control elevations for drainage ways are provided. 100- stability). year flow contained in easement ❑ Minimum slope of drainage swales is 2%. TEMPORARY SEDIMENT BASINS ❑ Drainage easements are seeded and protected with erosion control blankets or they are sodded where concentrated ❑ Sized to store 2-year,24-hr storm from the drainage area flow from more than 1 acre or 4 lots is directed. Blanket below the outlet pipe(no smaller than 1800 cf/acre of category specified per Mn/DOT 3885.1. Plan depicts drainage area),or ❑ required blanket locations. ❑ Sized at 3,600 cf/acre of drainage area. Velocity computations are provided for drainage ❑ Designed to minimize short-circuiting. easements where concentrated flow from more than 2 ❑ Floating debris discharge is prevented. •acres or 8 lots is directed.Where 10-year velocities ❑ Designed for full dewatering. exceed 5 ft/sec,permanent turf reinforcement mats are ❑ Energy dissipation provided at outlet pipe. installed per City std.plate 7-07.Mats per Mn/DOT ❑ Principal and emergency spillway designed per BMP 3888.1 or manufacturer and product is specified. Plan storm frequency standards. depicts blanket locations and cross sections. ❑ Fenced if slopes exceed 4:1 per city detail. ❑ Easement documents are signed and submitted to Public ❑ Plan requires any permanent or temporary sediment ponds Works with a check for recording if not included in plat. to be constructed before other construction starts. INFILTRATION/FILTRATION PERMANENT PONDS ❑ Type(s)used. ❑ Entire drainage/service area shown(in drainage report). ❑ Infiltration basins • ❑ 50 scale or larger grading plan with pond cross section. ❑ Infiltration trenches. ❑ Where possible,provide a forebay at the inlet;locate inlet ❑ Rain gardens. and outlet at opposite ends of pond;and provide length to ❑ Sand filters. width ratio>3. ❑ Organic filters. ❑ Multi-cell design where practical. ❑ Bioretention. ❑ 10:1 bench is provided for first 1 foot of depth below ❑ Natural depressions(wetlands not included) normal water elevation. ❑ Other ❑ 4:1 max slope from normal water elevation to 100-year ❑ Floatables removed before infiltration/filtration system. water elevation. ❑ Site sensitivity analysis included ❑❑ 3:1 max slope below normal water elevation. ❑ Evaluation of hydrologic impact included. ❑ Pond depth is 4 to 10 feet based on normal water level. ❑ Infiltration scheduled after full site development and Normal Water Level elevation is shown. stabilization. ❑❑ 100-year high water level is shown. ❑ Runoff routed away from infiltration system during Inlets are at or below normal water level. construction. ❑ Outlet is designed to prevent short-circuiting and ❑ Site controlled to minimize soil compaction. discharge of floating debris. ❑ Pretreatment sediment removal included. ❑❑ Permanent pool volume 1800 cfper acre drained. ❑ Designed for''/z inch of runoff from total impervious Water quality volume equal to %inch runoff total surface areas for ultimate development, drains within 48 impervious surface area,at ultimate development. hours. ❑ 1 inch water quality volume used for sites ❑ System bypass for flows that cannot be filtered. ❑ discharging within 1 mile of impaired waters. ❑ Minimum vertical separation of 3 feet between seasonally '/2 inch water quality volume infiltrated for sites saturated soils(or bed rock)and bottom of infiltration discharging within 1 mile of impaired waters. system. ❑ Outlet size to discharge no more than 5.66 cfs/acre of pond surface. ❑ Soil test results,system capacity calculations,and❑ Energy dissipation on outlet piping. computer modeling results included.❑ Minimum 10'width maintenance access provided. ❑ Areas less than 1 acre not draining to pond managed by: ❑ Infiltration systems not permitted for vehicle fueling or • ❑ Grassed swales. ❑ Small ponds. service areas. ❑ Grit chambers. ALTERNATIVE AND COMBINED PRACTICES ❑ ❑ Other ❑ Combined practice(narrative in drainage report). Emergency overflow spillway is provided to ❑ Alternative practice(narrative in drainage report). accommodate 100-year event.High point elevation and ❑ Full calculations and plans included(narrative in drainage direction of overflow are marked on plans. report). ❑ Emergency overflow spillway is located to protect adjacent property and large fill sections. ❑ 100-year runoff which is designed to flow to the pond does not bypass the pond;unmodeled 100-year flow does 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_< 15%,cross slope 5 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-nin.us/water/storinwater/index.htTnl • RpCHESTFq SUBDIVISION AND NON-RESIDENTIAL LOT GRADING PLAN CHECKLIST •'dh:�.tspiA revised March 2010 KEY Site: =Yes =No Prepared By: Date: Blank Not Applicable Reviewed By: Date: GENERAL Temporary ❑ p ary stockpiles include additional sediment control ❑❑ NPDES permit including SWPPP is referred to on plan and temporary cover after 14 days. ❑ 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 ❑ 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 ❑ Submitted Signed Drainage Report per City Template plans. ❑ Owner name(s)and address(es)listed on Grading Plan. ❑ All proposed lot comer elevations are shown. ❑❑ Plan is 1"=50' or larger scale. North arrow shown. ❑ Proposed elevations of garage and lowest floor,ground at Plan is drawn in two-foot contours. All finished contours front and rear of building,along with the structure type and adequate existing contours are labeled. are indicated on the plan. ❑ Existing contours are dashed and proposed are solid. ❑ Top of foundation is min.6"above the ground. ❑❑ Directional arrows are shown for proposed drainage. ❑ Grade 1'below top of foundation 10' from building. Details of terrain and drainage are provided for areas ❑ Freeboard to structures. Floor el. or the grade adjacent to ❑ adjacent to the proposed grading. the building is at least V above any overflow elevation, ❑ Existing public and private utilities are shown. and at least 2'above any pond 100-year water level, ❑ Boundaries of drainage areas shown(in drainage report). whichever is greater and min. 1' above FEMA flood el. ❑ Soil types shown(in drainage report). ❑ Drainage flows away from structures at min.2%. Areas not to be disturbed clearly defined. ❑ Temporary or permanent diversion swales,stabilized with ALL receiving waters,including wetlands,within 1 mile turf mat,pipe,riprap,are used at the top of slopes shown or identified includinv im aired vaterc '— a----p----��.�•�.�. exceeding 4:1,when applicable. ❑ Property limits are shown. Streets are labeled.Lot& ❑ Minimum lot slopes for vegetated areas are 2%minimum. ❑ block information. Street address shown,if known. ❑ All exposed soil stabilized in 14 days. Proposed sidewalk shown for commercial/industrial sites. ❑ County/NII�IDOT permit obtained for work in their ROW. ❑ Soil within 1 mile of impaired water-7 days. ❑ Substantial Land Alteration approved for elevation El or permanent cover is indicated for all disturbed areas. Temporary seeding specifies seed mix ❑ changes>_ 10' or other criteria that require a SLA. including disk anchored mulch on all slopes>200'or> ❑ All City Council approval conditions are met. 5%. Permanent cover specifies 4"min.topsoil,seed mix The following areas are tabulated for residential(acres): and disk anchored mulch,or 4"min.topsoil and sod. • Total platted area(site area) ❑ Slopes steeper than 4:1 and 4:1 slopes longer than 30' are • Total area disturbed seeded and protected with erosion control blankets or • Total developable area(excluding floodway,natural sodded and staked. Blanket category specified per steep slopes, &wetlands). Mn/DOT 3885.1. Plan depicts required blanket locations. ❑ The following areas are tabulated for non-residential ❑ Statement that slopes steeper than 4:1 are stable from (acres): land-sliding and surface erosion. Geotechnical report for • Total project area slopes>3:1. • Total impervious areas of project,existing& ❑ For sites where temporary or permanent cover will not be proposed. complete by November 15,plan indicates adequate • Tabulation of total and impervious area by tax parcel. measures to control spring erosion&sedimentation. ❑ Schedule of BAP installation shown. DRAINAGE SWALES&EASEMENTS ❑ BMP details included. ❑ Drainage and Utility easements are shown and labeled on ❑ Concrete washout management BMP addressed on plan. the plan. ❑ Dewatering activities discharge to treatment facility. ❑ Drainage easements are provided where concentrated SITE GRADING,SEDIMENT&EROSION CONTROL flow is received from more than 1 adjacent lot and also ❑ Down-slope sediment control scheduled before grading. where concentrated flow is received from more than 1 Adjacent property protected from drainage and sediment. acre of adjacent property. 100-year flow contained in Stabilized vehicle exit(s)are provided,minimize number. easement. Silt fences are provided per BMP Manual 6.31.In ❑ Mum drainage easements for flows from 1 acre or concentrated flow areas is"high flow,heavy duty"type. less or 4 lots or less are a minimum of 15'wide. Ditch is ❑ All storm sewer inlets,existing and proposed have inlet 1.9'deep V-shaped with 4:1 slopes. protection/temporary sediment control that remains until ❑ Minimum drainage easements for flows from more than 1 up-slope areas are stabilized. acre or more than 4 lots are a minimum of 20'wide. ❑ Maximum unbroken 3:1 or steeper slope of 75 feet horz. Ditch is a minimum of 2' deep with a 4'bottom and 4:1 slopes up to the easement line. 100-year runoff contained ❑ Emergency overflow with the high point elevation and ❑ in easement. direction of overflow are clearly marked on plans. ❑ Control elevations for drainage ways are provided. ❑ Emergency overflow swale meets minimum drainage Minimum slope of small drainage swales is 2/. easement standards noted above. • ❑ Drainage easements for flow from more than 1 acre or 4 OUTLETS&ENERGY DISSIPATION lots are seeded and protected with erosion control ❑ Discharge direction of flow generally 45 degrees or less blankets or sodded. Blanket category specified per to the flow direction of receiving ditch or stream. ❑ Mn/DOT 3 885.1. Plan depicts required blanket locations. ❑ Discharges to rear property lines shall generally be piped Velocity computations are provided for drainage to at least the rear property line. easements where concentrated flow from more than 2 ❑ Where discharge pipe velocities are 10 fps or less,riprap acres or 8 lots is directed.Where 10-year velocities and filter volumes are indicated in accordance with exceed 5 ft/sec,permanent turf reinforcement mats are Mn/DOT Standard Plate. installed per City std.plate 7-07.Mats per Mn/DOT ❑ Where discharge pipe velocities are greater than 10 fps, 3888.1 or manufacturer and product is specified. Plan energy dissipater is provided along with riprap and filter. ❑ depicts blanket locations and cross sections. ❑ Discharges on slopes steeper than 10%shall not be Easement documents are signed and submitted to Public allowed unless discharge is into existing drainage ditch ❑ Works with recording fee or included in plat. and volume of water in ditch is not greater than 110%of Ditches within 200' of surface water or Property line the pre-developed condition. stabilized in 24 hrs after connection.STORM DRAIN SYSTEM,INLETS,& OVERFLOWS ❑ Pipe outlet energy dissipation complete within 24 hours of connection to surface water or outlet. ❑ All apron elevations(inlets and outlets)are labeled. Area ❑ Evaluation of downstream adequacy provided(capacity& inlet, CB,MH, elevations are labeled. Pipe sizes and stability). types 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 store 2-year,24-hr storm from the drainage area ❑ storm drains does not flow through public CB's. below the outlet pipe(no smaller than 1800 cf/acre of 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:5 90'at junctions. ❑ Floating debris discharge is prevented. Drainage does not cross intersections(no valley gutters). _n Designed for full dewatering. U CB spacing as necessary for inlet capacity,curb spread, ❑ Energy dissipation provided at 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. ❑ Apron inlets to the storm sewer include trash racks. ❑ Fenced if slopes exceed 4:1 per City detail. ❑ 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 before other construction starts. ❑ For other than Rl &R2,drainage from impervious ❑ For areas draining less than 10 areas alternative sediment surfaces is collected on-site and not sheet drained onto control(5 acres within 1 mile of impaired waters). 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 Overflow swales are provided which limit the depth of upslope excavation). ponding in the street to 2' or less. * As a reference document see http://www.pca.state.nm.us/water/stormwater/index.html