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Home My WebLink AboutItem 07Feasibility Report Prepared for: 701 Xenia Avenue South, Suite 300 Minneapolis, MN 55416 763.541.4800 FEASIBILITY REPORT 2011STREETIMPROVEMENT PROJECT FOR THE CITY OF LAKEVILLE, MINNESOTA December 16, 2010 Prepared By: WSB & Associates, Inc. 701 Xenia Avenue South, Suite 300 Minneapolis, MN 55416 763-541-4800 763-541-1700 (Fax) Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 December 16, 2010 Honorable Mayor and City Council City of Lakeville 20195 Holyoke Avenue Lakeville, MN 55044 Re:Feasibility Report 2011Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Dear Honorable Mayor and City Council: Transmitted herewith for your review is a feasibility report which addresses improvements associated with the 2011 Street Improvement Project. We are available at your convenience to discuss this report. Please do not hesitate to contact me at 763-287-7173 if you have any questions regarding this report. Sincerely, WSB & Associates, Inc. Morgan A. Dawley, PE Project Manager Enclosure srb CERTIFICATION I hereby certify that this plan, specification, or report 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. Monica R. Heil, PE Date: December 16, 2010Lic. No. 47497 Quality Control Review Completed By: Morgan A. Dawley, PE Date: December 16, 2010Lic. No. 44178 Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 TABLE OF CONTENTS TITLE SHEET LETTER OF TRANSMITTAL CERTIFICATION SHEET TABLE OF CONTENTS 1.EXECUTIVE SUMMARY...............................................................................................1 2.STREET AND UTILITY IMPROVEMENT PROJECT..............................................2 2.1Introduction..............................................................................................................2 2.1.1Authorization...............................................................................................2 2.1.2Scope............................................................................................................2 2.1.3Data Available.............................................................................................2 2.2General Background................................................................................................2 2.2.1Project Location...........................................................................................2 2.3Existing Conditions..................................................................................................3 2.3.1Surface.........................................................................................................3 2.3.2Storm Sewer.................................................................................................4 2.3.3Wetlands......................................................................................................5 2.4Proposed Improvements...........................................................................................6 2.4.1Surface.........................................................................................................6 2.4.2Storm Sewer.................................................................................................6 2.4.3Water and Sanitary Sewer Improvements....................................................8 2.4.4Street Sign Replacement..............................................................................8 2.4.5Mailbox Replacement..................................................................................8 2.4.6Permits/Approvals........................................................................................8 2.4.7Construction Access.....................................................................................9 2.4.8Public Involvement......................................................................................9 2.5Future Improvements and Additional Considerations.............................................9 2.5.1Street Lighting within the Glenn Addition..................................................9 3.FINANCING....................................................................................................................10 3.1Opinion of Cost......................................................................................................10 3.2Funding..................................................................................................................10 4.PROJECT SCHEDULE..................................................................................................12 5.FEASIBILITY AND RECOMMENDATION..............................................................13 Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 TABLE OF CONTENTS (continued) Appendix A Figure 1:Location Map Figure 2:Typical Section –Local Streets th Figure 3:Proposed Street and Storm Sewer Improvements –205Street, Idalia Avenue, thth Iceland Avenue, 207Street, 207Court Figure 4:Proposed Street and Storm Sewer Improvements –Iberia Avenue, th 205Street, Hughes Avenue, Howland Avenue, Hunter Court th Figure 5:Proposed Street and Storm Sewer Improvements –Upper 206Street, Lower thth 208Street, 208Street Appendix B 2011 Street Improvement Project Opinion of Probable Cost Appendix C Assessment Map ID Assessment Roll Appendix D 2010 Geotechnical Report –Soil Boring Logs Appendix E Neighborhood Informational Meeting Minutes –October 28, 2010 Public Comment Summary Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 1.EXECUTIVE SUMMARY The 2011 Street and Utility ImprovementProject includes surface and utility improvements to the following roadways totaling approximately 13,710 feet (2.60 miles): th 205Street (Dodd Boulevard to east terminus at Progressive Railway right of way) th Idalia Avenue (north terminus to 207Street) thth Iceland Avenue (205Street to 207Street) th 207Street (Dodd Boulevard to Progressive Railway right of way) thth 207Court (207Street to cul-de-sac) th Iberia Avenue (Kenwood Trail to 205Street) th 205Street (Iberia Avenue to Holyoke Avenue) th Hughes Avenue (205Street to cul-de-sac) th Howland Avenue (205Street to cul-de-sac) Hunter Court (Kenwood Trail to cul-de-sac) thth Upper 206Street (east of 8510 Upper 206Street to 20678 Hershey Avenue) thth Lower 208Street (Holiday Avenue to 208Street) thth 208Street (Lower 208Street east to cul-de-sac) The deteriorated condition of the existing roadway surfaces and the drainage issues experienced along these streets make the proposed improvements necessary. Reclamation of the existing bituminous pavementand roadway reconstruction is recommended for all streets within the project area. New concrete curb and gutter is proposed to be installed along all roadways within the Glenn Addition where only bituminous curb currently exists. Structurally deficient concrete curb and gutter will be replaced elsewhere within the project limits. Proposed utility improvements include the installation of new storm sewer facilities and the reconstruction of structurally deficient sanitary sewer manholes. $2,820,000 The total estimated project cost for the 2011 Street Improvement Project is which includes a 10%contingency and 28% indirect costs for legal, engineering, administrative, and financing costs. The project is proposed to be funded through special assessments to benefitting property owners and City funds. The project is proposed to be completed in 2011, including all restoration items. The project is feasible, necessary, and cost effective from an engineering standpoint and should be constructed as proposed herein. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 1 2.STREETAND UTILITY IMPROVEMENT PROJECT 2.1Introduction 2.1.1Authorization On December 6, 2010, the Lakeville City Council authorized the preparation of an engineering feasibility report for the 2011 Street Improvement Project. 2.1.2Scope The 2011 Street Improvement Project includes surface and drainage improvements for areas identified by the City’s Pavement Management Program for reconstruction. 2.1.3Data Available Information and materials used in the preparation of this report include the following: City of Lakeville Record Plans Dakota County Topography Maps Utility Record Drawings Lakeville Water Resources Management Plan, Barr Engineering, dated June 2008 Certified Grading Plans and the Stormwater Calculations for Regional Stormwater Basin SC-41-1, Constructed with the Marion Fields Development Field Observations of the Area and Discussions with City Staff Field Survey Televising Reports for the Sanitary Sewer System (Completed by the City of Lakeville) Water Main Leak Survey (Completed by the City of Lakeville) Geotechnical Evaluation Report, Braun Intertec, dated December 2010 City of Lakeville Street Reconstruction Assessment Policy FEMA Floodplain Maps, dated 1998 2.2General Background 2.2.1Project Location The streets proposed for improvements include: th 205Street (Dodd Boulevard toeast terminus at Progressive Railway right of way) th Idalia Avenue (north terminus to 207Street) thth Iceland Avenue (205Street to 207Street) th 207Street (Dodd Boulevard to Progressive Railway right of way) thth 207Court (207Street to cul-de-sac) th Iberia Avenue (Kenwood Trail to 205Street) th 205Street (Iberia Avenue to Holyoke Avenue) Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 2 th Hughes Avenue (205Street to cul-de-sac) th Howland Avenue (205Street to cul-de-sac) Hunter Court (Kenwood Trail to cul-de-sac) thth Upper 206Street (east of 8510 Upper 206Street to 20678 Hershey Avenue) thth Lower 208Street (Holiday Avenue to 208Street) thth 208Street (Lower 208Street east to cul-de-sac) Figure 1Appendix A The project areas are shown in of of this report. 2.3Existing Conditions 2.3.1Surface Streets within the proposed improvement area are aging and experiencing various severities of alligator cracking, block cracking, transverse cracking, longitudinal cracking and localized drainage issues. All project areas contain landscaping, trees, and numerous other private improvements beyond the edge of the roadway and within City right of way. th The 5-foot-wide concrete sidewalk located along the south side of Upper 206Street is the only existing pedestrian facility located within the project area. Table 1 below provides a summary of existing street conditions within the 2011 Street Improvement Project. Table 1 –2011 Street Improvement Project Summary of Existing Street Conditions Approx. Year of Street Curb Sub-base Avg. Bit. Original Street NameROWWidthType(aggregate)Sub-gradeSectionConstruction 3’ Poorly th 205Street (west of 2.5" - 60’32’ B-BBit.8-10”Graded 1971 Progressive Rail ROW)5.5” Sandy Fill 5’ Poorly Idalia Avenue60’32’ B-BBit.9”Graded 2”1971 Sandy Fill 16’ Poorly Iceland Avenue60’32’ B-BBit.8”2.5”1971 Graded Sand 4’ –5’ Poorly 4.5” - th 207Street60’32’ B-BBit.7-9.5”1971 Graded 6.5” Sandy Fill 4’ Clayey th 207Court50’32’ B-BD4129”2.5”1974 Sand Fill 4’ –6’ Poorly Iberia Avenue60’32’ B-BB6184” –6.5”3” -6”1972 Graded Sandy Fill Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 3 Table 1 –2011 Street Improvement Project Summary of Existing Street Conditions Approx. Year of Street Curb Sub-base Avg. Bit. Original Street NameROWWidthType(aggregate)Sub-gradeSectionConstruction 4’ Poorly th 205Street (east of Graded 3”1961 60’32’ B-BB6184” –5” Progressive Rail ROW) Sandy Fill 6’ Poorly Hughes Avenue60’32’ B-BB6126”2”1971 Graded Sand 6’ Poorly Howland Avenue60’32’ B-BB6185”Graded 3”1972 Sandy Fill 6’ Poorly Hunter Court60’32’ B-BD4124.5”Graded 2.5”1984 Sandy Fill 4’ Poorly th Upper 206Street60’36’ F-FB6185”Graded 2”1984 Sandy Fill 6’ Poorly th Lower 208Street60’32’ B-BB6184” –8”2” -3”1968 Graded Sand B618 2’Poorly th 208Street60’32’ B-Band 8”Graded 3.25”1972 D412Sandy Fill A copy of the geotechnical soil boring logs prepared for this project by Braun Intertec in Appendix D December 2010 may be found in of this report. 2.3.2Storm Sewer ththth Glenn Addition: 205Street, Idalia Avenue, Iceland Avenue, 207Street and 207Court The existing storm sewer system providing drainage for the entire Glenn Addition consists of the following: th Three catch basins located at the intersection of Iceland Avenue and 207Street thth Two catch basins located along 207Street between Iceland Avenue and 207 Court thth Two catch basins located along 207Court at 207Street City as-built information indicates runoff collected by these catch basins travels through existing storm sewer pipe and outlets into Regional Stormwater Basin SC-41-1, which th was constructed with the Marion Fields development (the basin is located south of 207 Street, west of and adjacent to the Progressive Rail right of way). As-built and survey data indicate the existing storm sewer pipe leadingto this storm water basin is located within the Progressive Rail right of way. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 4 Historically, the existing storm sewer facilities within the Glenn Addition have proven inadequate. A lack of concrete curb and gutter, minimal street grades and an inadequate number of inlet structures within the Glenn Addition has resulted in significant drainage issues. Poorly draining areas within the development are easily visible and have contributed to the deterioration of the pavement within the Glenn Addition. th Iberia Avenue, 205Street, Hughes Avenue, Howland Avenue and Hunter Court The existing storm sewer system in this area of the project consists of the following: th Minimal storm sewer along Iberia Avenue and 205Street. A culvert located along the shared lotline for 20365 and 20370 Hughes Avenue. This culvert provides drainage for most of Hughes Avenue and is connected to a storm sewer manhole constructed within the drainage and utility easement adjacent to the Lake Vale townhome development. Two curb cuts within the Howland Avenue cul-de-sac are designed to drain runoff from Howland Avenue. This runoff is intended to flow overland through James Jensen Park to the existing drainage channel referred to as the North Branch of South Creek. However, insufficient grade through James Jenson Park results in much of the runoff collecting in the cul-de-sac curb line of Howland Avenue until such time as it evaporates or infiltrates. A single catch basin located within the cul-de-sac of Hunter Court drains the entire street. Historically, this single inlet has proved an adequate means of stormwater drainage. ththth Upper 206Street, Lower 208Street, 208Street The existing storm sewer system in this area of the project consists of the following: th Six existing catch basins along Upper 206Street th Two catch basins at the low point of Lower 208Street th Two catch basins at the low point of the 208Street cul-de-sac, east of the th intersection with Lower 208Street. th Historically, the existing storm sewer facilitiesalong Upper 206Street have proven adequate. However, more than 24 acres currently drain to the two catch basins located at th the low point along Lower 208Street. The property owners located at 8330 and 8340 th Lower 208Street, adjacent to the low point in the road, experience water entering their garages and low floors when storm water overtops the existing curb line during large storm events. 2.3.3Wetlands No wetlands exist within the project. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 5 2.4Proposed Improvements 2.4.1Surface Roadway reconstruction is proposed for each of the streets within the project due to the level of distress the bituminous pavement in the area is experiencing, and will consist of the complete removal of the existing bituminous roadway. New barrier-style concrete curb and gutter will be installed along the streets within the Glen Addition. Spot curb and gutter replacement will be completed elsewhere within the project, with structurally deficient curb being replaced. All streets within the project will be reconstructed to their current widths to minimize impacts. Reconstruction of the streets to the City’s standard 7-ton design is proposed to consist of the following section: 1 ½-inches of bituminous wearing course, 2-inches of bituminous base course, and 6-inches of reclaimed aggregate base over an acceptable, compacted th subgrade. 2-inches of bituminous wearing course are proposed for 207Street, as it is identified as a minor collector by the City’s Comprehensive Transportation Plan.All streets within the project will be re-established to include a 6-inch crown, further Figure 2Appendix A promoting drainage within the roadways. of illustrates this proposed roadway section. 2.4.2Storm Sewer Reconstruction of the streetsprovides the opportunity to improve drainage within the project areaswith the installation of additional storm sewer facilities. Proposed drainage improvements within the project include: th Installing additional catch basins along Iberia Avenue, 205Street, Hughes Avenue and Howland Avenue. Replacing the CMP culvert that currently drains Hughes Avenue with a storm sewer structure that will connect to the new storm sewer facilities proposed along th 205Street between Hughes Avenue and Howland Avenue. Installing a storm sewer manhole structure within the Howland Avenue cul-de-sac to eliminate the ineffective curb cuts that are currently intended to drain the cul- de-sac. Installing a water quality manhole adjacent to Howland Avenue prior to discharging runoff generated within the project areas to the drainage channel referred to as South Creek. Storm sewer improvements are also proposed within the Glenn Addition and along thth Lower 208Street and 208Street. Glenn Addition Installing concrete curb andgutter within the Glenn Addition, where bituminous curb currently exists, will provide another means by which to improve drainage within that neighborhood. Runoff collected within the Glenn Addition flows to existing regional stormwater basin SC-41-1, asidentified by the Lakeville Water Resources Management Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 6 Plan, dated June 2008. The plan also indicates that the existing regional basin is adequately sized to accommodate the entire drainage area contributing to runoff collected within the Glenn Addition. th Within the project area, 207Street is identified as a State Aid Street on the City’s Municipal State Aid System (MSAS). No State Aid Funds are proposed to be used with th the reconstruction of 207Street, and therefore, State Aid Standards for stormsewer design do not apply. thth Lower 208Street and 208Street thth Storm sewer improvements have been identified for Lower 208Street and 208Street. th Two catch basins located at the low point of Lower 208Street currently drain more than 24 acres within that neighborhood. These catch basins discharge to the drainage channel th north of Lower 208Street, referred to as South Creek. The existing 15-inch storm sewer pipe discharges to the channel at an elevation approximately 4-feet below the 100- year high water elevation for the channel, as identified by FEMA’s Flood Insurance Rate Map for the area. Stormwater collects within the street during larger storm events as the water elevation within the channel rises and backs up into the storm sewer pipe. The observed emergency overflow (EOF) for the low point of the road is higher than the elevation of the garage and low floor openings for the properties located at 8330 and th 8340 Lower 208Street, causing water to back up into the garages and lower levelsof these homes. To alleviate street flooding issues in this area it is necessary to discharge storm water to an area of the channel with a high water level (HWL) that is lower than the HWL at the existing storm sewer discharge point. By directing all of the stormwater collected along thth Lower 208Street and 208Street to the easterly cul-de-sac, and installing storm sewer th along the shared lot line between 8200 and 8241 208Street, discharge can be made into an area of the channel where the HWL is approximately 2 ½-feet lower. Ten-foot drainage and utility easements (DUE) were platted on both sides of the aforementioned lot line, as this area currently serves as an emergency overflow for the cul-de-sac. The proposed storm sewer layout will allow a storm water quality manhole to be installed within the paved cul-de-sac area, making it easily accessible for Public Works staff to clean and maintain. Similarly, City staff will be able to access the storm sewer pipe th discharging to the channel via 210Street right of way and City-owned property as an alternative to using drainage and utility easements to gain access the pipe. thth Final design of the storm sewer improvements along Lower 208Street and 208Street should include modeling the hydrology for the area to determine if further increasing the size of the pipe discharging to the channel and/or revising the EOF at the low point for th Lower 208Street could provide further protection from flooding during large storm th events for the residents locatedat 8330 and 8340 Lower 208Street. Water quality manholes are proposed for the new storm sewer along Howland Avenue th and 208Street, prior to discharging runoff generated within the project areas to the drainage channel referred to as South Creek. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 7 Figure 3, Figure 4 Figure 5 Proposed storm sewer improvements are shown on and in Appendix A . 2.4.3Water and Sanitary Sewer Improvements In the fall of 2010, the City’s Public Works Department televised the sanitary sewer, completed a water main leak detection test and evaluated all of the water main valves within the project. Seventeen (17) sanitary sewer manholes were identified as structurally deficient and will be reconstructed as a part of this project. The costs associated with sanitary sewer manhole reconstruction will be funded entirely using City Trunk Sanitary Sewer funds. No water main pipe, valves or hydrants are proposed to be repaired/replaced with this project. 2.4.4Street Sign Replacement All existing street signs within the project will be replaced with new street signs that meet the Federal Highway Administration’s (FHWA) requirements for retroreflectivity. 2.4.5Mailbox Replacement Those mailboxes disturbed by the installation of newconcrete curb and gutter or storm sewer facilities will be replaced as a part of this project. Moving forward, it will be the City’s policy to replace all mailboxes within street improvement project areas where curb is being removed and replaced. The City is in the process of updating its Standard Details to include a new specification for all mailboxes installed within a City of Lakeville right of way. This detail will also meet United States Postal Service (USPS) requirements. At the time of this report, only those mailboxes within the Glenn Addition are proposed to be replaced with the project. 2.4.6Permits/Approvals An NPDES permit for construction activity will be required as more than 1 acre will be disturbed with the project. ARight of Releasefrom Progressive Railway is required for: th The surface improvement work identified along 207Street abutting the railroad rightofway, and The storm sewer work leading to regional stormwater basin SC-41-1, which is located within the railroad right of way. th At this time, street improvements for 207Street are only proposed within City right of way. Progressive Railway has indicated that it may be interested in extending the street improvements to the railway crossing and that cost sharing opportunities with Progressive Railway exist for work within the railroad right of way. The potential for Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 8 street improvements within the railroad right of way and cost sharing opportunities will be reviewed by Progressive Railway once preliminary plans havebeen prepared. A Dakota County Work in Right of Way permit is required for: Work within the Dodd Boulevard (CSAH 9) right of way adjacent to the Glenn Addition Work within the Kenwood Trail (CSAH 50) right of way adjacent to Iberia Avenue and Hunter Court 2.4.7Construction Access The contractor will be responsible for providing access to all properties throughout the project.Adequately signed detours will be identified to direct traffic around the construction zones and notify users of the increased truck and construction activity. 2.4.8Public Involvement A public informational meeting for the proposed project was conducted October 28, 2010. Preliminary information was presented to attendees regarding the proposed improvements, costs, funding, schedule, and impacts associated with the project. Comment cards were made available to attendees at both meetings. One comment card was received at City Hall after the October 28 meeting. Summaries of the correspondence received and questions and answers provided at the informational Appendix E. meetings are included in 2.5Future Improvements and Additional Considerations 2.5.1Street Lighting within the Glenn Addition At the October 28, 2010Neighborhood Meeting, a resident inquired about the possibility of installing additional street lighting within the Glenn Addition as a part of this street improvement project. Currently, only the street intersections are lighted by mast-arm- style lights atop wooden utility poles. The installation of new street lighting within a neighborhood is an additional special benefit, and the cost to be assessed shall be 100% of the cost of installing the new streetlight facilities. A thorough review of the costs associated with the installation of additional streetlights and a survey of resident opinion can be added to the scope of this project, as was done with the 2007 Street Improvement Project within the Dakota Heights neighborhood, at the direction of the City Council. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 9 3.FINANCING 3.1Opinion of Cost Appendix B Detailed opinions of cost for the various project areas can be found in of this report. The opinions of cost incorporate estimated 2011 construction costs and include a 10% contingency factor. Administrative costs are projected at 28% of the construction cost and include engineering, legal, financing, and administrative costs. Table 2 below provides a summary of the opinions of probable cost for the 2011 Street Improvement Project. Table 2 –2011 Street Improvement Project Summary of Cost Total Schedule A –Surface Improvements$1,693,000 Schedule B –StormSewer Improvements$961,000 Schedule C -Glenn Addition Curb and Gutter$148,000 Schedule D –Sanitary Sewer Improvements$18,000 TOTAL$2,820,000 3.2Funding Financing for the 2011 Street Improvement Project will come from City Funds and Special Assessments. The sanitary sewer repairs are proposed to be financed by the City’s Operating Fund. Special Assessments to benefiting properties are proposed to fund 40% of the surface and storm sewer improvements identified for the project, with the remaining 60% funded using City funds. Those th properties located within the Glenn Addition where bituminous curb currently exists (205 th Street, Idalia Avenue, Iceland Avenue and 207Street) will receive the additional special benefit of new concrete curb and gutter. As such, 100% of the costs associated with the new concrete curb and gutter within the Glenn Addition shall be assessed. Assessments for this project were calculated on a per parcel (unit) basis as identified in the City’s Assessment Policy. The funding level anticipated through the levy of Special Assessments to benefitting property $1,210,000 owners for street improvements is with the following proposedassessments: $6,655.59 Single Family Unit Assessment Rate –Glenn Addition..........................per unit $4,274.30 Single Family Unit Assessment Rate –All other project areas...............per unit Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 10 Appendix C The proposed assessment roll is included in of this report, along with an Assessment Map ID highlighting the benefitting properties and the assessment calculations for benefitting property owners. Table 3–2011 Street Improvement Project Funding Summary Funding SourceAmount Streetand Storm Sewer Assessments$1,210,000 City Operating Funds$18,000 City Park Assessments (James Jensen and Terrace Parks)$8,500 City CIP Funds$1,583,500 SUBTOTAL = $2,820,000 Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 11 4.PROJECT SCHEDULE The proposed project schedule for the 2011StreetImprovement Project is as follows: Neighborhood Open House Held ..............................................................October 28, 2010 Review Preliminary Feasibility Report..................................................December 16, 2010 Accept Feasibility Report/Set Public Hearing.......................................December 20, 2010 Public Hearing/Order Project.....................................................................January 18, 2011 Approve Plans and Specifications/Authorize Ad for Bids............................March 7, 2011 Open Bids/Compute Assessments...............................................................March 30, 2011 Declare Costs/Set Assessment Hearing...........................................................April 4, 2011 Assessment Hearing.......................................................................................April 18, 2011 Award Construction Contract.........................................................................May 16, 2011 Begin Construction*.......................................................................................May 23, 2011 Certify Assessments to County....................................................................November 2011 Final Completion….....................................................................................November 2011 *Schedule assumes any necessary private utility work is completed prior to start of construction. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 12 5.FEASIBILITY AND RECOMMENDATION The 2011 Street Improvement Project includes roadway reclamation, reconstruction, and storm ththth sewer improvements along 205Street, Idalia Avenue, Iceland Avenue, 207Street, 207Court, th Iberia Avenue, Hughes Avenue, Howland Avenue, Hunter Court, Upper 206Street, Lower thth 208Street, and 208Street. New concrete curb and gutter will be installed along all streets within the Glenn Addition where bituminous curb currently exists. Spot curb and gutter replacements will be made elsewhere within the project.Structurally deficient sanitary sewer manholes identified by the City’s Public Works Department will also be replaced as a part of this project. The total estimated cost for the 2011 Street Improvement Project including roadway and storm $2,820,000 sewer improvements is .Proposed funding for the project is provided through a combination of Special Assessments and City funds. This project is feasible, necessary, and cost-effective from an engineering standpoint. It is recommended to proceed with the improvements as outlined in this report. Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Page 13 APPENDIX A Figure 1: Location Map Figure 2: Typical Section –Local Streets th Figure 3: Proposed Street and Storm Sewer Improvements –205Street, thth Idalia Avenue, Iceland Avenue, 207Street, 207Court Figure 4: Proposed Street and Storm Sewer Improvements –Iberia Avenue, th 205Street, Hughes Avenue, Howland Avenue, Hunter Court th Figure 5: Proposed Street and Storm Sewer Improvements –Upper 206Street, thth Lower 208Street, 208Street Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Legend Project Location ± 0400800 Feet 2011 CIP Street Reconstruction WSB NO. 01715-72 Project Location Map Figure Lakeville, Minnesota 1 File: K:\01715-72\GIS\Maps\Figure 1 - Location Map.mxd, Dec 08, 2010 9:43:06 AM Legend Proposed Storm Sewer " Existing Storm Sewer " Existing Sanitary Sewer " Existing Water Main Proposed Street Improvement ± 0100200 Feet 2011 CIP Street Reconstruction WSB NO. 01715-72 Proposed Street and Figure Storm Sewer Improvements 3 Lakeville, Minnesota File: K:\01715-72\GIS\Maps\Figure 3.mxd, Dec 08, 2010 2:59:54 PM Legend Proposed Storm Sewer " Existing Storm Sewer " Existing Sanitary Sewer " Existing Water Main Proposed Street Improvement ± 0100200 Feet 2011 CIP Street Reconstruction WSB NO. 01715-72 Proposed Street and Figure Storm Sewer Improvements 4 Lakeville, Minnesota File: K:\01715-72\GIS\Maps\Figure 4.mxd, Dec 08, 2010 3:02:58 PM Legend Proposed Storm Sewer " Existing Storm Sewer " Existing Sanitary Sewer " Existing Water Main Proposed Street Improvement ± 0150300 Feet 2011 CIP Street Reconstruction WSB NO. 01715-72 Proposed Street and Figure Storm Sewer Improvements 5 Lakeville, Minnesota File: K:\01715-72\GIS\Maps\Figure 5.mxd, Dec 08, 2010 3:03:29 PM APPENDIX B 2011 Street Improvement Project Opinion of Probable Cost Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 Opinion of Probable Cost WSB Project:Design By: 2011 Street Improvement ProjectMRH Project Location:Checked By: City of Lakeville City Project No.: 11-02 WSB Project No:Date: 1715-7212/16/2010 MN/DOTEstimated Estimated Item No.SpecificationDescriptionUnitTotalEstimated Total Cost Unit Price No.Quantity A. SURFACE IMPROVEMENTS 12021.501MOBILIZATION LUMP SUM1$43,800.00$43,362.00 22101.511CLEARING ACRE1.00$2,500.00$2,500.00 32104.501REMOVE CURB AND GUTTERLIN FT7431$5.00$37,155.00 42104.503REMOVE CONCRETE WALKSQ FT655$0.75$491.25 52104.505REMOVE CONCRETE DRIVEWAY PAVEMENTSQ YD125$7.00$875.00 62104.505REMOVE BITUMINOUS DRIVEWAY PAVEMENTSQ YD291$2.00$582.00 72104.509REMOVE SIGNEACH32$50.00$1,600.00 82104.511SAWING CONCRETE PAVEMENT (FULL DEPTH)LIN FT590$4.50$2,655.00 92104.513SAWING BITUMINOUS PAVEMENT (FULL DEPTH)LIN FT1865$2.50$4,662.50 102104.513MILL BITUMINOUS STEP JOINTLIN FT935$3.00$2,805.00 112105.501COMMON EXCAVATIONCU YD10747$9.50$102,096.50 122105.507SUBGRADE EXCAVATIONCU YD538$12.00$6,456.00 132105.522SELECT GRANULAR BORROW (CV)CU YD2079$11.00$22,869.00 142112.501SUBGRADE PREPARATIONROAD STA138$150.00$20,700.00 152118.604AGGREGATE SURFACING, CLASS 2 (4.0" THICK) SQ YD27$30.00$810.00 162123.610STREET SWEEPER (WITH PICKUP BROOM)HOUR9$115.00$1,035.00 172130.501WATERM GALLONS88$30.00$2,640.00 182211.501AGGREGATE BASE CLASS 5 TON3248$14.00$45,472.00 192331.604BITUMINOUS PAVEMENT RECLAMATIONSQ YD42654$2.00$85,308.00 202331.607REMOVE EXCESS RECLAIMED MATERIAL (LV)CU YD500$5.00$2,500.00 212357.502BITUMINOUS MATERIAL FOR TACK COATGALLON15392$2.50$38,480.00 222360.501 TYPE 1 1/2" MVWE 35035B WEAR COURSETON4272$60.00$256,320.00 232360.502 TYPE 2" LVNW 35030B BASE COURSETON5512$55.00$303,160.00 242360.503 TYPE MVWE45035B WEARING COURSE(DRIVEWAYS)SQ YD291$25.00$7,275.00 252504.602IRRIGATION SYSTEM REPAIRLUMP SUM3$500.00$1,500.00 262504.602ADJUST VALVE BOXEACH25$350.00$8,750.00 272506.522ADJUST FRAME AND RING CASTING (SANITARY)EACH44$300.00$13,200.00 282521.5014" CONCRETE WALKSQ FT655$6.00$3,930.00 292531.501CONCRETE CURB & GUTTER DESIGN B612LIN FT113$13.00$1,469.00 302531.501CONCRETE CURB & GUTTER DESIGN B618LIN FT4873$13.00$63,349.00 312531.603CONCRETE CURB & GUTTER SURMOUNTABLELIN FT822$17.00$13,974.00 322531.5076" CONCRETE DRIVEWAY PAVEMENTSQ YD125$40.00$5,000.00 332531.602PEDESTRIAN CURB RAMPEACH3$300.00$900.00 342531.603CONCRETE RIBBON CURBLIN FT23$11.00$253.00 352531.618TRUNCATED DOMESSQ FT24$35.00$840.00 362540.602MAIL BOX EACH62$175.00$10,850.00 372563.601TRAFFIC CONTROLLUMP SUM3$15,000.00$45,000.00 382564.602F & I SIGN PANEL LS1$4,548.00$4,548.00 392571.502DECIDUOUS TREE 2.5" CAL B&BTREE2$250.00$500.00 402573.502SILT FENCE, TYPE HEAVY DUTYLIN FT1500$2.50$3,750.00 412573.602TEMPORARY ROCK CONSTRUCTION ENTRANCE EACH3$500.00$1,500.00 422575.505SODDING TYPE LAWN (INCL TOPSOIL & FERT)SQ YD9300$3.50$32,550.00 Subtotal Schedule A - Surface Improvements$1,203,672.25 + 10% Contingencies$120,367.23 Subtotal$1,324,039.48 + 28% Indirect Cost$370,731.05 Schedule A Total - Surface Improvements$1,694,770.53 B. STORM SEWER IMPROVEMENTS 422104.501REMOVE SEWER PIPE (STORM)LIN FT2012$6.50$13,078.00 432104.509REMOVE MANHOLE OR CATCH BASINEACH16$200.00$3,200.00 440214.523SALVAGE CASTING (STORM)EACH8$75.00$600.00 452501.51524" RC PIPE APRON WITH TRASH GUARD AND SHEET PILINGEACH2$2,000.00$4,000.00 462501.51536" RC PIPE APRON WITH TRASH GUARD AND SHEET PILINGEACH2$3,000.00$6,000.00 472502.5414" PERF PVC PIPE DRAINLIN FT228$15.00$3,420.00 482503.52136" SPAN RC PIPE-ARCH SEWER CLASS IIALIN FT294$75.00$22,050.00 492503.52144" SPAN RC PIPE-ARCH SEWER CLASS IIALIN FT327$125.00$40,875.00 502503.54112" RC PIPE SEWER DESIGN 3006 CL VLIN FT515$27.00$13,905.00 512503.54115" RC PIPE SEWER DESIGN 3006 CL VLIN FT1586$31.00$49,166.00 522503.54118" RC PIPE SEWER DESIGN 3006 CL IIILIN FT1487$33.00$49,071.00 532503.54121" RC PIPE SEWER DESIGN 3006 CL IIILIN FT1626$37.00$60,162.00 542503.54124" RC PIPE SEWER DESIGN 3006 CL IIILIN FT1273$42.00$53,466.00 552503.54130" RC PIPE SEWER DESIGN 3006 CL IIILIN FT1149$50.00$57,450.00 562503.54133" RC PIPE SEWER DESIGN 3006 CL IIILIN FT285$60.00$17,100.00 572503.54136" RC PIPE SEWER DESIGN 3006 CL IIILIN FT1259$70.00$88,130.00 582503.54148" STORMWATER TREATMENT SYSTEMEACH1$15,000.00$15,000.00 592503.54172" STORMWATER TREATMENT SYSTEMEACH1$40,000.00$40,000.00 602503.602CONNNECT TO EXISTING STORM SEWEREACH1$600.00$600.00 612506.501CONST DRAINAGE STRUCTURE DESIGN SPECIAL 1EACH61$1,500.00$91,500.00 622506.502CONSTRUCT DRAINAGE STRUCTURE DESIGN 60" MHEACH15$2,500.00$37,500.00 632506.522ADJUST FRAME AND RING CASTING (STORM)EACH20$300.00$6,000.00 642573.530STORM DRAIN INLET PROTECTIONEACH80$125.00$10,000.00 Subtotal Schedule B - Storm Sewer Improvements$682,273.00 + 10% Contingencies$68,227.30 Subtotal$750,500.30 + 28% Indirect Cost$210,140.08 Schedule B Total - Storm Sewer Improvements$960,640.38 C. GLENN ADDITION CURB AND GUTTER IMPROVEMENTS 652531.501CONCRETE CURB & GUTTER DESIGN B618LIN FT8066$13.00104,858.00$ Subtotal Schedule C - Glenn Addition Curb and Gutter Improvements104,858.00$ + 10% Contingencies$10,485.80 Subtotal$115,343.80 + 28% Indirect Cost$32,296.26 Schedule C Total -Glenn Addition Curb and Gutter Improvements$147,640.06 D. SANITARY SEWER IMPROVEMENTS IMPROVEMENTS 662506.502RECONSTRUCT SANITARY MANHOLEEACH17$750.00$12,750.00 Subtotal Schedule D - Sanitary Sewer Improvements$12,750.00 + 10% Contingencies$1,275.00 Subtotal$14,025.00 + 28% Indirect Cost$3,927.00 Schedule D Total -Sanitary Sewer Improvements$17,952.00 Grand Total - 2011 Street Improvement Project$2,821,002.98 APPENDIX C Assessment Map ID Assessment Roll Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 File: K:\01715-66\GIS\Maps\Segments_CIP2011_11x17_Aerial.mxd, Oct 04, 2010 10:27:25 AM APPENDIX D 2010 Geotechnical Report –Log of Test Borings Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 APPENDIX E Neighborhood Informational Meeting Minutes –October 28, 2010 Public Comment Summary Feasibility Report 2011 Street Improvement Project City of Lakeville, MN WSB Project No. 1715-72 EngineeringPlanningEnvironmentalConstruction 701 Xenia Avenue South Suite 300 Minneapolis, MN 55416 Tel: 763-541-4800 Fax: 763-541-1700 Memorandum To: Steve Mielke, City Administrator Chris Petree, Operations and Maintenance Director Troy Grossman, Street Superintendent Keith Nelson, City Engineer Zach Johnson, Assistant City Engineer From: Monica Heil, Project Engineer Date: October 29, 2010 Re: City Project No.11-02 WSB Project No. 1715-72 A Neighborhood Meeting was held on Thursday, October 28, 2010 to discuss the proposed 2011 Street Improvement Project, City Project #11-02. Approximately 35-40 residents attended the meeting held at the Lakeville Senior Center to discuss the proposed improvements. The following Staff and WSB & Associates, Inc. representatives were in attendance: Chris Petree, City of Lakeville, Operations and Maintenance Director Troy Grossman, City of Lakeville, Street Superintendent Zach Johnson, City of Lakeville, Assistant City Engineer Jay Kennedy, WSB & Associates, Inc. Morgan Dawley, WSB & Associates, Inc. Monica Heil, WSB & Associates, Inc. The following is a summary from the Question and Answer portion of the presentation: Question #1 (Q1): How will the assessments be paid? Answer #1 (A1): The City is proposing a 20-year amortization schedule at approximately 4.0%. Q2: Why isn’t tax revenue paying for the reconstruction of these public streets? Why can’t revenue from the Lakeville Liquor Stores be used to pay for this project? A2: Approximately 60% of the project costs will be paid for by the City using funds generated by property taxes. Approximately 40% of the project will be paid by assessments for those residents living in the neighborhoods where the reconstruction will take place and the greatest benefit from the project will be received. The City of Lakeville policymakers have determined that profits generated by the Lakeville Liquors Stores will be used for other Capital Improvement Projects. St. Cloud Minneapolis Equal Opportunity Employer K:\01715-72\Admin\Docs\10 28 10 Neighborhood Meeting Minutes.doc.docx Lakeville 2011 Street Improvement Project Neighborhood Meeting Minutes October 29, 2010 Page 2 Q3: How will I get to my home during construction of there is only one entrance to the neighborhood? (This question was posed by a resident living along Hunter Court) A3: The contractor will be required to maintain access to properties during construction. Q4: Will this street re-construction project impact the City’s Downtown Redevelopment Plan? A4: No, this project will not impact the Downtown Redevelopment Plans. Q5: Are townhomes assessed differently? A4: Yes. Per the City’s assessment policy, townhomes and duplexes are assessed 50% of the single family unit rate. Commercial/Industrial uses are assessed 150% of the single family unit rate, and apartments are assessed 25% of the single family unit rate per apartment unit. Q6: I have a new driveway in an area receiving all new curb…..what is going to happen to my driveway? A6: It may be necessary to remove a portion of your driveway within the right-of-way in order to accommodate the new curb and gutter. In this case, driveways will be replaced in-kind, i.e. concrete driveways will be replaced with concrete, bituminous driveways will be replaced with bituminous. Q7: The watermain in my street was installed within the development 40-years ago…..the City is not going to replace this watermain with the project while the street is dug up? Is the City proposing that these utilities are going to last until the next time the road is reconstructed 40-years from now? When the City reconstructed the downtown area in the mid-1990’s, they replaced all the utilities. (This question was posed by a resident th living on the corner of 205 Street and Howland Avenue) A7: The City’s Utility Department is in the process of inspecting all of the trunk facilities within the project. Televising of the sanitary sewer was just completed, and they are in the process of completing leak detection on the fire hydrants. If the project moves forward, the extent of the repairs necessary will be outlined in the feasibility report. Yes, the utilities in the downtown area were replaced when those roads were reconstructed in the mid-1990’s, but those utilities were originally installed in the 1920’s and were 70+ years old at the time of their replacement. The utilities in your neighborhood are approximately 40-year old, and were constructed with materials and workmanship superior to those available in the 1920’s.Preliminary results from the televising tapes and utility inspection indicate that trunk facilities are in good condition. Should the existing utilities require repair work prior to the next major street reconstruction project within these neighborhoods, in-situ repair techniques, such as slip lining, now exist which allow for repairs to be made without open cutting the road. Q8: Will there be any water quality improvements like raingardens or ponds with all of the storm sewer improvements being added? th A8: The existing stormwater basin located south of 207 Street will be evaluated to determine if improvements will be required to accommodate the additional runoff that will flow th through the pond with the addition of new storm sewer along 205 Street, Idalia Avenue, th Iceland Avenue and 207 Street. Water quality manholes have preliminarily been identified for areas elsewhere with the project. K:\01715-72\Admin\Docs\10 28 10 Neighborhood Meeting Minutes.doc.docx Lakeville 2011 Street Improvement Project Neighborhood Meeting Minutes October 29, 2010 Page 3 Q9: Are these roads the oldest in the City? Why are some people being assessed and not others? A9: These streets are not the oldest in the City, but are among those roads in the poorest condition as identified in the City’s Pavement Management Plan. Those benefiting property owners located within the project areas will be assessed. We can discuss after the meeting if there is a question regarding assessments for any particular property located within the project (To our knowledge, this property owner did not pursue this line of questioning after the meeting with any City or WSB Staff). Q10: What are the existing/proposed load limits for the streets? A10: Residential streets are built to a 7-ton design. Q11: What are the major factors leading to the deterioration of our streets? A11: Poor drainage is likely the biggest factor. Water that is not draining from the pavement is finding its way into the street subgrade causing a great deal of damage during freeze-thaw cycles. Q12: What effect does heavy truck traffic have on our roads? We have 5 different waste haulers that pick up garbage in our neighborhood with 20-ton trucks. A12: Road restrictions are in place every spring limiting truck traffic along these streets to 5- ton/axel. However, school buses, emergency vehicles, and to a certain extent, waste haulers, are exempt from these restrictions. Q13: What about the frequency of waste hauling vehicles in our neighborhoods? Is there anything that can be done? A13: It is difficult to regulate waste haulers, and this issue has been discussed by the City’s policy makers multiple times over the years. Ultimately, the decision has been made by the City’s policy makers to allow free enterprise in the waste hauling business to continue and to allow multiple waste haulers to continue to serve the area. However, your concerns regarding waste haulers and the effect their vehicles have on your streets will be included in the comments presented to the City Council regarding this meeting. Q14: Can assessments be paid early without interest? A14: Yes. Q15: Can assessments be deferred? A15: Yes. There is a senior citizen deferment policy for those over 65-years of age. Additional questions regarding deferments, such as those for hardships, will need to be addressed by the City’s Finance Director. Q16: When will streets be opened back up to traffic? Will construction take place all summer? A16: The contractor will be required to maintain access to all properties during the project. The construction will likely be phased, with the contractor working on different streets at different times throughout the construction season. There will be periods of time where there will be minor delays and inconveniences during construction, but access will be maintained. K:\01715-72\Admin\Docs\10 28 10 Neighborhood Meeting Minutes.doc.docx Lakeville 2011 Street Improvement Project Neighborhood Meeting Minutes October 29, 2010 Page 4 Q17: Will any grading be done with the project? A17: The extent of the work required hasn’t been determined. If the project moves forward, and grading issues will be addressed in order to improve drainage in the area. Q18: Can street lights be added to the neighborhood with the project? (This question was posed by a resident living in the Glen Addition). A18: The possibility can be investigated if the neighborhood residents are interested. Q19: Is storm sewer being assessed? A19: Yes. The City will be paying for 60% of the storm sewer costs from funds generated by property taxes, and assessments paying for the other 40%. Q20: Isn’t the lack of storm sewer in the area the result of negligence in the design of the streets? Why am I paying for storm sewer if the street wasn’t designed to drain? A20: The streets and storm sewer systems were designed to drain, and the deterioration of the pavement surface has lead to some drainage issues. Storm Sewer design standards are much different today that they were 40-years ago, and so additional storm sewer is being proposed to meet today’s design standards. Q21: What type of curb will be installed where bituminous curb currently exists (The Glen Addition)? A21: B618 Q22: Are corner lots being assessed twice for both of the streets? A22: No. Assessments are calculated on a per unit rate, not on street frontage. Q23: Are we required to pay off the assessments before we sell our house? A23: The City does not require this, but the mortgage lender might. Q24: If new streetlights were installed, how would they be paid for? A24: They would be a separate special assessment. Q25: Can entire driveways be replaced as a part of the project? A25: Not as a part of the City Project. However, property owners can sometimes reach a deal with the contractor working on the City Project to do the private driveway work. Q26: Will mailboxes be impacted with all the new curb and gutter going in my neighborhood? (This question was posed by a resident of the Glen Addition) A26: Yes, as a part of the project, mailboxes are going to be removed and replaced with mailboxes meeting City Standards. During construction, temporary mailboxes will be installed. Q27: Will bank-owned properties be assessed? A27: Yes. K:\01715-72\Admin\Docs\10 28 10 Neighborhood Meeting Minutes.doc.docx Lakeville 2011 Street Improvement Project Neighborhood Meeting Minutes October 29, 2010 Page 5 Q28: Are lots assessed by the unit or by the front foot? A28: Lots are assessed on a per unit basis. Q29: I don’t currently have streetlights in my neighborhood, but I still pay the streetlight operating fee with my utility bill? A29: City Staff will look into this. Q30: The last question of the night was not a question but a comment, “Bill the assessments and build the new streets.” K:\01715-72\Admin\Docs\10 28 10 Neighborhood Meeting Minutes.doc.docx