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HomeMy WebLinkAbout09(A) - Approval of Resolutions Approving the Spring Lake Ridge Preliminary Plat and Planned Unit Development ReportSpring Lake Ü Spring Lake Ridge Preliminary Plat Location Map UP P E R P R I O R L A K E G D(9 04 ) SP R I NG L A K E G D(9 12 .8 ) LO W ER P R IO R L A K E G D(9 04 ) PI K E LA K ENE (8 20 .5 ) MYS T IC LA K ENE HA A S LA K ENE (9 07 .3 ) BL I N D LA K ERD (9 48 .7 ) AR T I C LA K ENE (9 06 .7 ) MA RK L E Y LA K ERD ( ) HO W A RD L A KE NE(9 57 .3 ) CR Y S T A L L A K E NE(9 43 .3 ) RI C E L A K E NE(9 45 ) CL E A R Y L A K E NE CA MP B E L L LA K ENE (N o t E s t ab .) SUBJECTPROPERTY SUBJECTPROPERTY c 35OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST 11-20-2019 NAP NCR Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 11-20-2019 LAKEVILLE, MINNESOTA 55044 I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Professional Surveyor under the laws of the State of Minnesota 42299 Peter J. Hawkinson 00-SURV-119034-PREPLAT.DWG PRELIMINARY PLAT 3.10 c 35OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST 11-20-2019 NAP NCR Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 11-20-2019 LAKEVILLE, MINNESOTA 55044 I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Professional Surveyor under the laws of the State of Minnesota 42299 Peter J. Hawkinson 00-SURV-119034-PREPLAT.DWG PRELIMINARY PLAT 3.11 c 35OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST 11-20-2019 NAP NCR Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 11-20-2019 LAKEVILLE, MINNESOTA 55044 I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Professional Surveyor under the laws of the State of Minnesota 42299 Peter J. Hawkinson 00-SURV-119034-PREPLAT.DWG PRELIMINARY PLAT 3.12 00-ENG-119034-SHEET-OPEN SPACE 4.30OPEN SPACE CALCULATION I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota c 35OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST 11-20-2019 NAP NCR Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 47504 11-20-2019 Brian N. Molinaro LAKEVILLE, MINNESOTA 55044 SETBACKS FRONT 25' SIDE 7.5' CORNER 20' REAR 25' MIN. WETLAND BUFFER 20' MIN. NO GRADE ZONE 10' LOW FLOOR 3' + OHW 2' + HWL LOW OPENING 2' + EOF FILTRATION ELEV 3' + SHWT 00-ENG-119034-SHEET-GRAD-OVR 6.10OVERALL GRADING PLAN I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota c 35OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST 11-20-2019 NAP NCR Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 47504 11-20-2019 Brian N. Molinaro LAKEVILLE, MINNESOTA 55044 c OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 11-20-2019 LAKEVILLE, MINNESOTA 55044 I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Landscape Architect under the laws of the State of Minnesota 44763 Jennifer L. Thompson 00-PLAN-119034-SHEET-LAND.DWG 411-20-19 TLM TLM L1LANDSCAPE PLAN c OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 11-20-2019 LAKEVILLE, MINNESOTA 55044 I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Landscape Architect under the laws of the State of Minnesota 44763 Jennifer L. Thompson 00-PLAN-119034-SHEET-TREE.DWG 511-18-19 TLM TLM T1TREE PRESERVATION PLAN TREE PRESERVATION NOTES c OFSPRING LAKE RIDGE PRIOR LAKE, MINNESOTA WINKLER DEVELOPMENT 10519 165TH STREET WEST Name Reg. No.Date Revisions 1. 1-27-2020 City Comments Date Designed Drawn 2019 Pioneer Engineering, P.A. Mendota Heights, MN 55120 2422 Enterprise Drive (651) 681-1914 Fax: 681-9488www.pioneereng.com LANDSCAPE ARCHITECTSLAND SURVEYORSLAND PLANNERSCIVIL ENGINEERS 11-20-2019 LAKEVILLE, MINNESOTA 55044 I hereby certify that this plan was prepared by me or under my direct supervision and that I am a duly Licensed Landscape Architect under the laws of the State of Minnesota 44763 Jennifer L. Thompson 00-PLAN-119034-SHEET-TREE.DWG 511-18-19 TLM TLM T2TREE PRESERVATION PLAN TREE PRESERVATION NOTES G:\Developments\DEV20-0000__ Spring Lake Ridge\Spring Lake Ridge - Revised Preliminary Plat Review Memo 021120.docx701 XENIA AVENUE S | SUITE 300 | MINNEAPOLIS, MN | 55416 | 763.541.4800 | WSBENG.COMMemorandum To: Nick Monserud, Assistant City Engineer Pete Young, Water Resources Engineer From: Kris Keller, Stephanie Thulien, Chuck Rickert - WSB Date: February 11, 2020 Re: Spring Lake Ridge Development City Project No. DEV19-000020 WSB Project No. 10704-000 We have reviewed the revised Preliminary Plat/PUD amendment Submittal documents submitted for the Spring Lake Ridge Development dated January 25 and 27, 2020 as prepared by Pioneer Engineering. We have the following comments with regards to stormwater management and engineering; comments that have been addressed since the last review are grayed out, new comments are in red, and comments with no font changes are still applicable. General 1. Submit for and provide copies to the City of any required permits from regulatory agencies (MCES, Minnesota Pollution Control Agency, Minnesota Department of Health, NPDES, etc.) Applicant indicated the comment will be addressed with the submittal of the final plans 2. The final plat plans shall follow the requirements of the Public Works Design Manual (PWDM). Applicant indicated the comment will be addressed with the submittal of the final plans Plat 1. Provide a list of Outlots to be dedicated to the City and which will be HOA maintained. 2. Remove Outlots C and D. Applicant indicated that Outlots C and D will be owned and maintained by the HOA which separates them from Outlots B and F which are owned and maintained by the City. 3. Extend lot lines to Right-of-way through Outlot C. Applicant indicated that Outlot C will be owned and maintained by the HOA 4. Outlot A – extend property lines to new right-of-way line and existing property line. Applicant indicated that Outlot A will be owned and maintained by the HOA 5. Extend Lots 43 & 44 property lines so that Lots 48 and 49 share a common lot line. Applicant indicated that they would like to keep the area as dedicated open space as part of Outlot E 6. Remove Lot 93. Noted as Lot 91 with the revised plan set. Spring Lake Ridge February 11, 2020 Page 2 Applicant indicated that they would like to keep Lot 93 as they claim it conforms to the PUD requirements. As discussed during a meeting with the applicant, they will provide sight triangle analysis for the intersection to aid in putting the City at ease with this lot location. The City has not received a sight line analysis at this time. 7. ROW along Sunset Circle should be evenly spaced to 10’ off of the back of the existing curb for the length of the road. Applicant has expanded the ROW to 16’ off of the back of the existing curb for most of the road however, it is not evenly spaced around the bend where it is reduced slightly to approximately 15.4’. 8. Revise ROW at the end of Sunset Circle to allow for the installation of a City standard cul-de-sac. Stormwater Management 1. Provide a SWPPP meeting the requirements of the NPDES Construction Stormwater Permit. The SWPPP must be reviewed and approved by the City before an Excavating and Grading Permit is issued. Applicant indicated the comment will be addressed with the submittal of the final plans. 2. The picture provided on the front of the Stormwater Management Plan is not the correct site. 3. Impervious areas listed in the tables provided in the Stormwater Management Plan are not consistent with those listed in the HydroCAD model or page 4.31 of the plans. Confirm impervious areas and recalculate the water quality volume required. Please add an additional table to the Stormwater Management report summarizing offsite drainage areas, including offsite impervious areas. Table should be consistent with the HydroCAD model. 4. Drainage areas listed in table provided in the Water Quality section do not match the values listed in HydroCAD. Please confirm correct values and revise. 5. Provide calculations or show 2.5” event in HydroCAD to confirm the 2.5” event runoff values for the required pond treatment volume. 6. The table showing values for the NPDES Basin Water Quality Volume Discharge Requirement is not populated. Please update. 7. Confirm the proposed box culvert beneath Sunset Ave is an adequate size to maintain hydraulic connection for Wetland 2. Consider MnDNR comments relating to culvert style. Complete. Note that the DNR will be reviewing this crossing in further detail and could have additional comments at that time. 8. Modify the filtration areas for Basin 200P and 400P to eliminate the small slivers off the larger basin. These will have issues with constructability for how small they are and have future maintenance issues. Pond 400P shows a portion of the filtration basin to be around 6 feet wide in the narrowest part. Please increase this filtration strip to be a minimum of 10’ wide. 9. All low floor elevations must be 2 feet above the HWL of the stormwater basin and filtration basin and 3 feet above the OHW. Lots 91 and 99 currently do not meet the minimum low floor elevation requirement. 10. Low opening elevations must be 2 feet above any EOF elevations. Lots 41, 50, and 51 currently do not meet the minimum low opening elevation requirement. Spring Lake Ridge February 11, 2020 Page 3 11. The EOF of the ponds should be at least 1 foot higher than the HWL. The top berm elevation should be at least 2 feet higher than the HWL. Ponds 100P, 200P, and 300P require a higher EOF elevation. The EOF of Pond 300P is currently labeled at 919 whereas the HWL is shown as 919.3. Please revise. 12. The table provided in the Proposed Development section of the Stormwater Management Plan should include offsite areas to show consistency with the HydroCAD model. Confirm all values are consistent with the model and provided figure. 13. The volume control requirement for Prior Lake is 1.0 inch of runoff from new impervious surfaces. In the Volume Control section, 1.1 is used. Note that filtration is being used, not infiltration (table on Page 10 and within the HydroCAD model). 14. Consider using the curve number reductions provided in the Public Works Design Manual towards meeting the volume control requirement. These methods include tree plantings, native grass buffers, porous pavements, impervious disconnections, green roofs, and soil amendments. 15. Provide water quality calculations confirming the water quality requirement of 60% TP and 90% TSS removal is met. MIDS model not provided in submittal. 16. Provide storm sewer calculations confirming that the facilities are designed to handle a 10-year, 24-hour Atlas 14 rainfall event. Applicant indicated the comment will be addressed with the submittal of the final plans. 17. Provide drainage calculations to show the sizing of pipes and catch basin interception analysis. Catch basins can receive a maximum of 3 cfs and multiple catch basins may be required at low points. Applicant indicated the comment will be addressed with the submittal of the final plans. 18. Provide additional draintile and draintile stubs to allow for lots to be able to connect sumps or private draintile. Applicant indicated the comment will be addressed with the submittal of the final plans. 19. Revise Section I.C. of the Stormwater Management Report to note that the site does not discharge to a special water. The site does discharge to an impaired water (Spring Lake) and therefore the BMPs listed in Sections 23.9 and 23.10 of the Construction Stormwater General Permit will apply. 20. Provide the total amount of land disturbance for the proposed project, and if it exceeds 50 acres, note that the SWPPP for the project has a mandatory MPCA SWPPP review. Applicant indicated the comment will be addressed with the submittal of the final plans. 21. Provide existing and proposed hydrology and water quality calculations specific to the area draining to the off-site wetland on City property (north of pond 300P). City currently reviewing for off-site wetland design and capacity for additional drainage. 22. The outlets for Pond 100P, Pond 300P and Pond 400P shown on the storm sewer plans do not match the outlet inverts listed in the HydroCAD model. 23. FES 260 is shown to have an invert at 925, which is listed as the top of filtration area for Pond 200P. If the outlet is at the same elevation as the filtration media, no filtration storage can be counted towards the volume credit. Revise or remove the 925 outlet for the filtration area. 24. Draintile should be shown with a positive slope to ensure drainage to the outlet structures. Spring Lake Ridge February 11, 2020 Page 4 Grading 1. Provide spot elevations between lots such that drainage is not directed towards the proposed building pads. Applicant indicated the comment will be addressed with the submittal of the final plans 2. Provide additional easement to accommodate where surface drainage flows across an adjacent lot. With the final plat, maintain drainage along the side lot lines within the drainage and utility easements. Pay particular attention to where the elevation of adjacent lots differs 18” or more. 3. Provide how Jonni Way will transition from the temporary turnaround condition to the permanent drive through condition with lots 64 and 65. With final plans, clarify what the temporary and permanent conditions of the cul de sac are with the proposed bituminous, curb, storm sewer, and grading. 4. Show/grade access routes to BMP’s for maintenance equipment. Access routes are shown on the erosion control plan. Also show on the grading plan. Utilities 1. A detail review will take place once final plat (plan and profile) has been submitted. Below are general comments regarding the utility plans that were submitted with the preliminary plat. Applicant acknowledged Comment 2. Provide how the flows from the proposed development will impact the capacity of the existing lift station. Replacement pumps may be required to accommodate the additional flows. Applicant indicated that the City is reviewing the capacity of their pumps 3. Maintain 10’ minimum horizontal separation between watermain and both sanitary and storm sewers (e.g. storm sewer crossing Jonni Way) The storm sewer crossing Jonni Way along Periwinkle is within 10 feet of the watermain. 4. Verify hydrant spacing to provide adequate fire protection to all proposed lots. 5. Describe the proposed connection to the existing watermain. Applicant indicated the comment will be addressed with the submittal of the final plans 6. Provide an additional gate valve on the southwestern leg of the watermain at the eastern intersection of Ridgeline Way and Sunset Ave. 7. Shift the gate valve from the southwestern leg to the northeastern leg of the watermain at the intersection of Jonni Way and Sunset Ave. 8. Provide for the additional restoration with the installation of additional services for lot 97 on Sunset Circle. Applicant indicated the comment will be addressed with the submittal of the final plans. Streets/Transportation Spring Lake Ridge February 11, 2020 Page 5 1. A detail review will take place once final plat (plan and profile) has been submitted. Below are general comments regard the street plans/site plans that were submitted with the preliminary plat. Applicant acknowledged comment 2. Widen the existing Sunset Avenue from CSAH 12 (170th Street) to where the new street begins from 32 feet to 36 feet, allowing parking on one side. Sidewalk is required to be installed on this portion of Sunset. 3. Provide an additional 16 feet of right of way on the existing Sunset Avenue from CSAH 12 (170th Street) to where the new street begins. 4. As traffic continues to increase on the new Collector street and Sunset Avenue review the operation and safety at the intersections of Sunset Avenue at the Collector street and CSAH 12 (170th Street) at Sunset Avenue for future traffic control changes. Specifically, if traffic congestion, crashes or speed of traffic become issues roundabouts may be considered. Applicant acknowledged comment 5.Provide a temporary cul-de-sac at the end of Jonni Way. Cul-de-sac will have curb/gutter and will be built to the City’s standard street section. Provide necessary easements for temporary cul-de-sac. Applicant indicated easements will be provided with the submittal of the final plat. 6. Provide a letter from the Geotechnical Engineer, that the City’s standard street section will accommodate a 9-ton road design for Sunset Avenue for the proposed area and the existing portion of Sunset Ave. to be a collector or any modifications to the standard street section needed. The letter shall also verify that local streets will meet a 7-ton road design. Applicant indicated the comment will be addressed with the submittal of the final plans. 7. Sunset Circle should be constructed to the City standard cul-de-sac. Tapers do not need to be as pronounced as in our detail, but radius shall meet our standards. 8. Sunset Avenue shall have B618 curb. Applicant indicated curb cuts for individual lot driveways will be installed at the time of home construction Miscellaneous 1. Show or propose how trails and sidewalks will be extended to connect with existing trails or stubbed to the development limits. 2. Trails along CSAH 17 shall be extended the length of the property. 3. The City currently has Sunset Avenue and Sunset Trail. We are not in favor or a 3rd street with the name “Sunset”. This is confusing for EMS, Public Works, etc. 4. HOA documents shall identify the HOA’s responsibility to maintain all boulevard trees and landscaping on public property/ROW and maintain trails/sidewalks within the development. A maintenance agreement will be required as well. Applicant acknowledged comment 5. Driveways can not be wider than 24’ within ROW. Spring Lake Ridge February 11, 2020 Page 6 Applicant acknowledged comment 6. Please explain further the stormwater benefit identified as one of your PUD benefits. The City would only consider stormwater a benefit if basins were oversized and a credit system established with Prior Lake Spring Lake Watershed District for future City re- construction projects. Applicant stated that this item is still in negotiation with City staff. PLSLWD Comments 1. PLSLWD Rules require filtration of the runoff volume from the 2-yr, 24-hour event. 2. Biofiltration basins should not be modeled as infiltration basins. 3. The Biofiltration Media should be amended so it is not a source of Phosphorous. At a minimum, at least half the organic leaf compost should be substituted for peat. Our recommendation is an 80% (sand), 10% (compost), 10% (peat) media. Applicant indicated the comment will be addressed with the submittal of the final plans. 4. Biofiltration media beds on portions of Ponds 200 and 400 are very narrow making construction difficult if not infeasible. 5. Consider Pond 400 outfall/outlet location modifications to minimize water quality short- circuiting. 6. PLSLWD’s Comprehensive Wetland Plan ranks Wetland 1 and Wetland 2 as High for downstream water quality. Development of this site should consider potential enhancements of these wetlands to increase flood storage and water quality benefit via outlet modification/restriction and/or expansion of storage while maintaining compliance with City hydroperiod standards for wetlands. Applicant indicated the comment will be addressed with the submittal of the final plans. 7. The proposed plan routes an additional 4.75 acres north to the existing Highway 12/17 Wetland Enhancement Project. Evaluation of the effect of this additional runoff is required to verify no adverse impact to the treatment function of the basin or the intended hydrologic regime and plant species establishment. City currently reviewing for off-site wetland design and capacity for additional drainage. 8. PLSLWD is not interested in obtaining conservation easements within platted lots identified on Sheet 4.30. DNR Comments 1. Nearly the entire platted area falls within the shoreland overlay for Spring Lake (70-54). The current plat looks to meet all density standards for a shoreland PUD and it appears that 50% of the area is designated to “open space”. 2. OHW elevation seems off with the lidar topography provided. However, the placement of the OHW is conservative and shouldn’t lie further landward than indicated on the plat. 3. Additional hydrologic analysis should be provided from Marschall Road to Spring Lake where it narrows and crosses the new Sunset Avenue next to lot 76. The BFE of 914 seems accurate, however there is a concern that the area around Sunset Avenue crossing will be impacted by the wetland area that flows through to the lake. The aerial photography of lot 76 appears to be wet even though it didn’t get delineated as a wetland. There is a concern that there is existing tile drainage in that area that could fail and impact lots 75/76 to be wetter than expected. Spring Lake Ridge February 11, 2020 Page 7 4. Disappointed to see so much forest cleared. A good diversity and a variety of tree sizes for resilience of the area should be provided. DNR forestry staff to review the replacement planting list. Applicant stated that they were still waiting on review from the DNR forestry staff. 5. Although the Sunset Avenue Crossing will not need a DNR public waters permit, DNR would like to review and comment on any proposed design. Would like to see offset culverts through that crossing, or a bottomless culvert or bridge. Applicant indicated the comment will be addressed with the submittal of the final plans. 6. Wetlands should be monumented and signed so that lawns don’t creep into wetland. That will be especially important for those lots that are near the Spring Lake wetland (72-76). 7.What is the difference between “outlot” and conservation easement and who will hold the land ownership? There seems to be some space between the outlet edges and the edges of the individual lots. Is that true or does each outlot abut the individual lots? Please confirm. Phone 952.447.9800 / Fax 952.447.4245 / www.cityofpriorlake.com Memo The Community Development Department has reviewed the Preliminary Plat and PUD plans for the subject project with a plan date of 1-27-2020 and we have the following comments. General 1. Development Fees – The following development fees are to be collected prior to recording of any approved 2020 final plat application: Park Dedication of unit(s) at $3,750 per unit, Trunk Water ($7,640/net acre), Trunk Sanitary Sewer ($4,530/net acre), Trunk Storm Sewer ($4,160/net acre), $9,000 Water Connection Fee, $9,000 Sewer Connection Fee, and a 4% administrative fee and 5% construction observation fee based on the total estimated construction costs (which include landscaping, streets, public trails, and public utilities). A park dedication fee will not be collected for PID 259080022 per a previous City purchase agreement. 2. The City Council will need to weight the amount of modifications (lot size and setbacks) requested verses the amount of PUD Benefits proposed above standard development requirements. a. PUD benefits proposed: i. Spring Lake Lakeshore Dedication and Open Space – over 50% open space is provided including Spring Lake public shoreline except for one residential lot ii. County Right of Way – 1 acre of land (25-foot width) iii. Public Trail System – Construction of the trail along Hwy 17 may be viewed as a PUD Benefit. Construct the trail north to Hwy 12 through the City property. Routine maintenance without long-term repair/replacement of the interior trail between Marschall Road and Sunset Avenue may not constitute a PUD Benefit for this trail segment. Additional sidewalk along existing Sunset Avenue may be a benefit. iv. Snowmobile road crossing improvements v. Escrow equivalent to $3 per square yard of material for future public street seal coating 3. Warranty Deeds – Submit draft warranty deeds for future public ownership Outlots with Final Plat application. Date: February 14, 2020 To: John Anderson and Bart Winkler, Winkler LLC From: Jeff Matzke, Planner Subject: Spring lake Ridge Preliminary Plat and PUD City Project #DEV19-000020 Preliminary Plat/Site Plan 4. Outlots – Outlots A, C, and D are proposed for private HOA outlots. Outlots B, E, and F are proposed for public outlots. Prepare exhibit and information explaining HOA maintenance areas and proposed expectations of sidewalks/trails/trees in outlot areas. 5. Lot area – Net area includes all private lots, private outlots, and local street right of way, adjust table accordingly. 6. PUD Zoning Modifications – In addition to other proposed public improvement modifications, the developer requests modifications to the typical R-1 zoning requirements in the following areas: a. Lot size – Min. proposed – 7,800 sq. ft. Min. required (R-1) – 12,000 sq. ft. b. Lot width - Min. proposed – 24 lots with min. 65 ft, 46 lots with min. 75 ft Min. required – 86 ft. c. Side Setback – Min proposed – 7.5 feet, Min. required – 10 feet d. Side yard abutting a street (Corner lot) – Min proposed – 20 feet, Min. required – 25 feet 7. Setback Table a. Lake Setback – Revise to indicate 75 feet rather than 50 feet b. Decks and Eves – How far are decks proposed to be allowed in setbacks under the setback table? c. Cantilever/Eves – Establish a maximum cantilever/eve allowed without inclusion of impervious surface Grading Plan 8. Retaining walls – Walls exceeding 4 feet in height will require a building permit application. Tree Preservation/Landscape Plan 9. Tree placement – On landscape plan/details plan, indicate note that placement of all trees shall be a minimum of 5 feet from front property lines within front yards. 10. Final tree locations – Tree locations may be subject to change depending on field construction of public/private utilities and maintenance access locations for ponding and utilities. Spring Lake Ridge Preliminary Plat and PUD March 2, 2020 City Council Location Map Concept Plans July 15, 2019 Concept Plan 101 lots, HOA dock September 3, 2019 Concept Plan 103 lots, 1 lake lot / 1 boat slip, collector road Public Comments •Water quality impacts •Size/Placement of potential HOA dock system •Impacts to the lake character •Environmental impacts to lake •Impacts on boat traffic/boating safety on Spring Lake •Traffic and pedestrian safety impacts on Sunset Avenue •Precedent for future development Preliminary Plat January 2020 Preliminary Plat Current Proposal Site Plan •Total site area: 83 acres •Proposed Development: •Setbacks: •Comp Plan / Zoning: Low Density Residential •Access: Sunset Avenue Open Space Tree Inventory Plan Landscape Plan Engineering Review •The Engineering and Public Works Department have reviewed the plans as well as the City’s consultant. •Prior Lake Spring Lake Watershed District has provided the Developer Comments. •The Department of Natural Resources has reviewed and commented. •At this point in time the Engineering Department is comfortable that all of the comments provided to the Developer are able to be addressed. Sewer and Water •Trunk Sanitary Sewer will be extended on the collector road. •Watermains extended under roadways. •Blue –Watermain •Green –Sanitary Sewer main Stormwater Management •Development has to meet City Stormwater Management Rules •Red –Stormwater ponds •Blue –Filtration basins Traffic Impacts •2008 Prior Lake City Council Adopted the CSAH 17 Corridor Study. •No access to CSAH 17 between CSAH 12 and Hwy 13. •Traffic Study required with the development. Traffic Study Purpose / Process •Evaluate traffic impacts of the proposed site development for the existing (2019), future 2021 and future 2040 conditions. •Analyze and document the existing and future transportation needs for the Study area. •Determine Collector roadway needs. Traffic Study Traffic Analysis •The traffic operations analysis shows that at the CSAH 12 and Sunset Avenue intersection assuming the current lane geometry and traffic control; the intersection is and would be operating at an overall LOS A during both the weekday AM and PM peak hours with all movements operating at LOS A, assuming the existing 2019, projected 2021 and projected 2040 traffic volumes. •The vehicle queuing analysis during the build condition in 2021 and 2040 shows that the northbound maximum queue would back up past the Shoreline Boulevard intersection by one to two vehicle in both the AM and PM peak hours. Traffic Study Roadway Configuration •The proposed new Collector street configuration from the south property line to the point it connects to the existing Sunset Avenue is consistent with the Cities Draft Transportation Plan. •The proposed new Collector street would be operating at a Level of Service A in 2021 and Level of Service B in 2040. •The existing Sunset Avenue from CSAH 12 to where the new street begins does not meet the Cities right of way or street width guidelines. Traffic Study Roadway Configuration •Traffic control options were considered at two intersections; CSAH 12 at Sunset Ave and Sunset Ave at the New Collector Street. The traffic control options that could be considered include: all-way stop; traffic signal, or; roundabout. •Based on review of the traffic volumes both intersections do not meet all- way stop sign warrants or traffic signal warrants. •Both intersections could be considered for roundabouts in the future if traffic conditions and/or safety warrants a traffic control change. The intersection of CSAH 12 at Sunset Avenue would require coordination with Scott County. Traffic Study Recommendations •Construct the proposed Collector street as shown on the Site plan to a 36-foot cross section with parking on one side in a 66-foot right-of-way. •Widen the existing Sunset Avenue from CSAH 12 to where the new street begins from 32 feet to 36 feet, allowing parking on one side. •Provide an additional 16 feet of right of way on the west side of existing Sunset Avenue from CSAH 12 to where the new street begins. Traffic Study Recommendations •As traffic continues to increase on the new Collector street and Sunset Avenue review the operation and safety at the intersections of Sunset Avenue at the Collector street and CSAH 12 at Sunset Avenue for future traffic control changes. •As development continues south of the Spring Lake Ridge development to TH 13 update the traffic analysis to ensure that the operation and safety of the Collector street is maintained Traditional Development Plan (Not PUD) City Staff Comments Planned Unit Development (PUD) •Project must identify PUD benefits for the community above standard requirements •Modifications requested –Smaller lots sizes and lot widths PUD Benefits •Public Shoreline Dedication –No future private docks in this area •Public Open Space –Dedication of land surrounding central wetland areas (which snowmobiles use) •County Roadway Dedication –Marschall Road (Hwy 17) right-of-way dedication for long-term future roadway improvements (1 acre of land) •Public Trails and Sidewalks –Installation (and routine maintenance by HOA) •Funds for Street Seal Coating •Snowmobile Trail Crossing Questions / Comments Spring Lake Ridge Plan Traffic Impacts •Staff explored potential direct access from CR 17 or Langford Ave •Sunset Avenue is 32 ft wide to the 17040 Sunset Ave property •Future Collector Street –36 feet width •Require a traffic study with development Traffic Study Traffic Conditions •Existing traffic counts from September 2019 •CSAH 12 Construction Detour no effect on turning at Sunset Ave •CSAH 12 traffic volume based on historic traffic conditions •2,120vpd on CSAH 12 •260vpd on Sunset Ave •Projected traffic volumes •3.1% / yr background growth on CSAH 12 •Area and site traffic based on ITE Traffic Generation Manual rates •Proposed Site, Low Density residential = 101 units completed by 2021 •Future area development based on City’s 2040 Comprehensive Plan •Urban Low Density residential (2.7 units/acre) •Urban Medium Density residential (6.0 units/acre) Traffic Study Traffic Conditions •Projected 2021 traffic volumes •No Build without site development •2,260vpd on CSAH 12 •260vpd on Sunset Avenue •Build with site development •2,750vpd on CSAH 12 •1,200vpd on Sunset Avenue •Projected 2040 traffic volumes •No Build without site development •4,000vpd on CSAH 12 •260vpd on Sunset Avenue •Build with site development •5,000vpd on CSAH 12 •2,400vpd on Sunset Avenue Traffic Study Roadway Configuration •The existing Sunset Avenue is designed and is operating consistent with the Cities Draft Transportation Plan as a local street. •Based on the projected traffic volumes of 1,200vpd in 2021 and 2,400vpd by 2040 the roadway would be functioning at a level more than a local City street which has typical volumes of 1000vpd or less.