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E-3a. 2015 Street Projects Carver Beach Area11 CITY OF CHANHASSEN 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone 952 2271100 Fax 952 2271110 Building Inspections Phone 952 2271180 Fax 952 2271190 Engineering Phone 952 2271160 Fax 952 2271170 Finance Phone 952 2271140 Fax 952 2271110 Park & Recreation Phone 952 2271120 Fax 952 2271110 Recreation Center 2310 Coulter Boulevard Phone 952 2271400 Fax 952 2271404 Planning & Natural Resources Phone 952 2271130 Fax 952 2271110 Public Works 7901 Park Place Phone 952 2271300 Fax 952 2271310 Senior Center Phone 952 2271125 Fax 952 2271110 Website wwwci chanhassen mn us MEMORANDUM TO. FROM- DATE- SUBJECT Paul Oehme, Director of Public Works /City Engineer Alyson Fauske, Assistant City Engineer (, T- December 8, 2014 i 2015 Street Rehabilitation Project No 15 -01 • Accept Feasibility Study, Call Public Hearing PROPOSED MOTION "The City Council adopts the attached resolution accepting the feasibility report for the 2015 Street Rehabilitation Project No 15 -01 and calls the public hearing for January 26, 2015 City Council approval requires a simple majority vote of the City Council present" BACKGROUND At the August 11, 2014 work session, staff reviewed with Council the proposed 2015 Street Improvements in the Carver Beach area. Kerber Boulevard, a Municipal State Aid Route is also proposed to be resurfaced in 2015 On October 27, 2014, the City Council authorized preparation of the feasibility study On November 19, 2014, staff held an Open House for the proposed project. DISCUSSION Every year the City considers streets that are in poor condition to be rehabilitated or reconstructed For the 2015 Street Rehabilitation Project, staff is proposing to rehabilitate approximately 4.3 miles of streets in the Carver Beach neighborhood The street segments within the proposed project were identified by the City's Pavement Management software in conjunction with site investigations Chanhassen is a Community for Life - Providing for Today and Planning for Tomorrow Paul Oehme 2015 Street Improvement Project Accept Feasibility Study, Call Public Hearing December 8, 2014 Page 2 The proposed improvements generally consist of milling and overlaying the pavement surface Severe pavement and subgrade distresses will be removed and replaced. Minor drainage improvements are also proposed to be addressed. The water main is thought to be in relatively good condition since there are no major water main breaks in the area and the hydrant bolts appear to be in good condition Some hydrants have also been identified as needing replacement because they have mechanical problems. These hydrants are also proposed for replacement A feasibility report was prepared by the Engineering Department staff. It is estimated the City will save about $150,000 with feasibility report preparation, design and construction observation not being outsourced A copy of the feasibility report is available in the Engineering Department. Below is a summary of the feasibility findings. Approximately 4 3 miles of streets are proposed to be milled and overlaid within the Carver Beach Area The streets in this area are 39 years old with the exception of Nez Perce Court, which was constructed in 1980 The streets were sealcoated in 1993 and 1998 and various areas were heavily patched in 2011 The street conditions in this area were last surveyed in 2013 The Pavement Condition Indices (PCIs) from the survey are shown on the map below. g \eng \publicA_2015 piojects \15 -01 2015 street improvements \12 -08 -2014 accept feasibility docx I mw �■ ■■ �:.::: . iii ■ IA rL wMa 1■■■ X11 �..� �� ►�� `tea � � I � - -- � g \eng \publicA_2015 piojects \15 -01 2015 street improvements \12 -08 -2014 accept feasibility docx Paul Oehme 2015 Street Improvement Project Accept Feasibility Study, Call Public Hearing December 8, 2014 Page 3 The streets within the project area are generally rural residential with bituminous curb and minimal concrete curb and gutter to facilitate runoff Curb and gutter is proposed to be added behind the existing storm sewer manholes that are set within bituminous curb. A small amount of drain tile was included in the feasibility estimate in the event that groundwater is encountered during construction and drain tile can be installed to alleviate the situation Rural residential roads are proposed to be milled and overlaid with four inches of bituminous. The street widths within the project area range between 16 and 26.5 feet wide. During field investigation staff noted that many street sections are wider than they appear as soil and sod has encroached on to the road surface and vegetation has grown on top of the bituminous. The feasibility study estimate is based on the average observed street widths. Each street segment will be resurfaced to a consistent width therefore some streets may be wider than they appear today and there may be more boulevard restoration than a typical mill and overlay project. Nez Perce Court, the southern 300 feet of Nez Perce Drive and the northern 130 feet of Nez Perce Drive are urbanized, therefore an edge mill and two inch overlay is proposed for these areas. The northern 400 feet of Lotus Trail was overlaid by City forces in 2006 While collecting field data, staff noted that the 2006 overlay was more extensive than originally thought. the overlay was from Napa Drive to Ponderosa Drive, approximately 1,600 feet The pavement condition within this segment varies. Staff has inspected the storm sewer structures and televised the storm sewer that was accessible to the Utility Department camera Based on these observations some minor replacement and repairs of the existing storm sewer is proposed with this project. These improvements are included in the estimated storm sewer costs. Because there are no additional impervious surfaces that will be added to the 2015 project area, it does not trigger any of the Federal, State or Local regulations Further, given the era during which this area was developed, there is very little right -of -way and limited property available to construct water treatment best management practices. Water quality improvements should be implemented where they can be in a cost effective manner The Anti- degradation Plan that the City authored in 2008 indicated that this area contributes a significant portion of total suspended solids and total phosphorus to Lotus Lake when compared to the other subwatersheds tributary to Lotus Lake It is also known that there are a few areas with drainage issues This project will seek to address those issues and provide other improvements where possible. There are three areas which are to be reviewed for potential improvements These include Woodhill Drive near the intersection with Yuma, Lotus Trail near Carver Beach Park, and Lotus Trail near the beach area at Napa Drive g \eng \public \_2015 projects \15 -01 2015 street improvements \12 -08 -2014 accept feasibility docx Paul Oehme 2015 Street Improvement Project Accept Feasibility Study, Call Public Hearing December 8, 2014 Page 4 WOODHILL DRIVE LOTUS TRAIL AT CARVER BEACH PARK Drainage from Fox Hill Dnve, Lotus Trail and Broken Arrow has been directed to a curb cut south of the parking area for Carver Beach Park. This has resulted in gully erosion on the side slope of Lotus Trail and the delivery of sediment into Lotus Lake. In 2012, the Riley- Purgatory Bluff - Creek Watershed worked with Chanhassen and several landowners to address drainage from Broken Arrow However, this did not address the other two sources nor did it address the gully that has formed In conjunction with The current vertical alignment of Woodhill Dnve is lower than the typical bounce of the wetland on the north side of the road This results in frequent inundation of Woodhill Dnve and subsequent sediment deposition onto the road It will be a goal of this project to raise the profile of the road, improve culvert hydraulics under Woodhill Drive and provide additional downstream water quality treatment either through a filtration swale, pond expansion or some combination of the two. this project, a catch basin with a sump manhole will be installed to capture sediment and dissipate energy before discharging into a stilling basin which will be constructed to provide treatment of the surface water prior to discharging to Lotus Lake. Staff has also had discussions with property owners on Broken Arrow about improving the inlet to the management practice installed in 2012. They have concerns about snow storage and property access g \eng \public\ 2015 projects \15 -01 2015 street improvements \12 -08 -2014 accept feasibility docx Paul Oehme 2015 Street Improvement Project Accept Feasibility Study, Call Public Hearing December 8, 2014 Page 5 LOTUS TRAIL AT NAPA DRIVE The current pond at Lotus Trail and Napa Drive is undersized for its watershed. With the road project, staff will evaluate possibilities to expand the pond and improve the hydraulics It is clear that additional depth is not possible given the proximity to Lotus Lake improvements is between $20,000 and $30,000 and the water table It may be possible to expand the surface area of the pond or provide additional pre- treatment in the way of installing a sump manhole and SAFL baffle There is also another discharge point which lacks any treatment prior to discharging into Lotus Lake This would be a candidate for an additional sump manhole and SAFL baffle Depending upon the amount of expansion and the depth of sump manhole, the estimated cost of these Staff has inspected the sanitary sewer manholes and provided recommended repairs, such as inflow /infiltration barriers, replacing rings with a riser section, replacing the castings or cover, and rebuilding the manhole The sanitary sewer system in the project area will be televised this winter to determine if any of the existing sanitary sewer needs of repair or replacement The water main in this area is ductile iron. City records do not show any water main breaks in this area however, and the soils do not appear to be corrosive It is recommended to replace some hydrants at this time PROJECT FUNDING Special assessments to the benefitting properties are proposed to pay for a portion of the proposed 2015 Street Improvement Project No 15 -01 per the City's assessment practice The remaining project costs are proposed to be paid from City funds. All the utility improvements are proposed to be paid for by the associated utility fund. The preliminary funding is shown below• g• \eng \public \_2015 projects \15 -01 2015 street improvements \12 -08 -2014 accept feasibility docx Paul Oehme 2015 Street Improvement Project. Accept Feasibility Study, Call Public Hearing December 8, 2014 Page 6 Funding Source Estimated Amount Project Cost Budgeted Assessments /Revolving Assessment Fund Stormwater Management Fund Water Utility Fund Sanitary Sewer Utility Fund $1,620,070.20 $1,850,000.00 $100,000 00+ $125,00000 $121,365.00 $125,000.00 $76,85900 $75,00000 $1,918,294.20 $2,175,000.00 + This estimate represents the known storm water infrastructure replacement needs at this time Additional storm water measures may be added during the design phase As previously discussed, two street rehabilitation techniques are proposed with this project, therefore two assessment rolls are proposed to reflect the cost difference between the methodologies Edge Mill and 2" Overlay Area Total Estimated Street Cost- $65,318 71 40% assessed. 40% of $65,318.71= $26,127 49 Number of assessable units- 14 Estimated unit assessment- $26,127 49 — 14 units = $1,866.25/unit Full Depth Mill and 4" Overlay Area Total Estimated Street Cost- $1,554,75149 40% assessed 40% of $1,554,751 49= $621,900 59 Number of assessable units. 218 Estimated unit assessment- $621,900 59 — 218 units = $2,852.76/unit The cost estimate for the edge mill and overlay includes a 10% contingency; the contingency for the full depth mill is 20% due to the severity of pavement distresses and variability associated with a full depth mill project. Both estimates include 5% indirect costs SCHEDULE The proposed project schedule is as follows. Public Hearing /Order Plans & Specifications Approve Plans & Specifications, Order Ad for Bids Bid Opening Assessment Hearing Project Begins Substantial Completion Attachments- Resolution CIP Sheets g \eng \public \_2015 projects \15 012015 street improvements \12 -08 -2014 accept feasibility docx January 26, 2015 February 9, 2015 March 13, 2015 April 27, 2015 May, 2015 August 30, 2015 CITY OF CHANHASSEN CARVER AND HENNEPIN COUNTIES, MINNESOTA DATE: December 8, 2014 RESOLUTION NO: 2014 -XX MOTION BY- SECONDED BY: A RESOLUTION ACCEPTING FEASIBILITY STUDY AND CALLING THE PUBLIC HEARING FOR THE 2015 STREET REHABILITATION (CARVER BEACH AREA) PROJECT NO. 15-01 WHEREAS, pursuant to resolution of the Council adopted October 27, 2014, a report has been prepared by City staff with reference to the above - referenced project, and this report is being received by the Council on December 8, 2014, and WHEREAS, the report provides information regarding whether the proposed project is necessary, cost - effective, and feasible NOW, THEREFORE, BE IT RESOLVED by the Chanhassen City Council. 1 The Council will consider the improvement of such project in accordance with the report and the assessment of abutting properties for a portion of the cost of the improvement pursuant to Minnesota Statutes, Chapter 429 at an estimated total cost of the street improvements of $1,620,070.20. 2 Public hearing for the proposed improvements within the 2015 Street Rehabilitation (Carver Beach Area) Project No 15 -01 shall be held on January 26, 2015 in the Council Chambers of City Hall at 7.00 PM The clerk shall give mailed and published notice of the hearing and improvement as required by law Passed and adopted by the Chanhassen City Council this 8th day of December, 2014. ATTEST Todd Gerhardt, City Manager Thomas A. Furlong, Mayor YES NO ABSENT Projects By Funding Source 2015 thru 2019 Department Street Improvements City of Chanhassen, MN Contact Paul Oehme Project # ST -012 Project Name Annual Street Improvement Program Account #1 601 -xxxx -4751 Account #2 Account #3 Account #4 Type Improvement Useful Life Unassigned Category Streets /Highways Priority n/a Description Total Project Cost- $22,769,500 Annual project to rehabilitate and reconstruct streets in the City. Current 5 -year plan shows the following neighborhood areas 2015 - Carver Beach area (south and west of Carver Beach Road) MSA - Kerber Blvd overlay (north of West 78th Street) and Dakota Ave (Hwy 5 to Lake Dr E) 2016 - North Manor Road, Washta Bay Road, Tanagers Lane, Sandpiper Trail, Piper Ridge Lane and Mmnewashta Woods Drive MSA - Park Road overlay and Park Place 2017 - Flamingo Drive area, Ches Mar Drive, Lone Cedar and Saddlebrook Pass neighborhood MSA - Bluff Creek Drive overlay and Bluff Creek Drive Trail extension 2018 - Orchard Lane, Forest Avenue, Forest Circle, Oriole Avenue, 64th Street and 96th Street 2019 - Fox Path area, Frontier Trail (north of 77th Street), Choctaw and Kurvers Point MSA - Minnewashta Parkwav overlav Justification I The City uses a Pavement Management System to monitor the condition of the City streets While proper preventative maintenance extends the life of the street and is cost effective, a street will eventually deteriorate to a point that further maintenance is no longer cost effective Rehabilitation projects extend the life of the street In cases when utilities or poor sub grade needs to be replaced or where streets have deteriorated to a point where rehabilitation will no longer be practical, reconstruction of the street is necessary A feasibility study is written to consider the merits of the project and scope of work The Highway 212 improvement project included a pedestrian trail along the first 2,500 feet of Bluff Creek Drive The resulting "gap" represents a missing link in the City's trail system south to Flying Cloud Drive Bluff Creek Drive is a difficult stretch of road to negotiate as a pedestrian in the absence of a trail This trail seement is planned to be constructed along with the 2017 MSA street reconstruction Prior Expenditures 2015 2016 2017 2018 2019 Total 9695,000 Construction 3,250,000 2,460,000 3,022,400 1,687,300 2,654,800 13,074,500 Total Total 3,250,000 2,460,000 3,022,400 1,687,300 2,654,800 13,074,500 Prior Funding Sources 2015 2016 2017 2018 2019 Total 9,695 000 Assessment/Revolving 1,850,000 1,560,000 1,622,400 1,687,300 1,754,800 8,474,500 Assess Fund Total MSA 1,400,000 900,000 1,400,000 900,000 4,600,000 Total 3,250,000 2,460,000 3,022,400 1,687,300 2,654,800 13,074,500 Budget Impact/Other This project may decrease maintenance costs Projects By Funding Source City of Chanhassen, MN Project # SS -014 Project Name Sanitary Sewer Replacement 2015 thr•u 2019 Department Sanitary Sewer Improvements Contact Paul Oehme Type Improvement Useful Life Unassigned Category Utilities Account #1 701 - 7025 -4751 Account #3 Priority n/a Account #2 Account #4 Description Total Project Cost $1,640,000 Replacement or rehabilitation of existing sanitary sewer lines in conjunction with the reconstruction of the City street Justification The City considers the condition of the existing utilities to the process to select streets for rehabilitation in an effort to realize cost savings by consolidating these projects Prior Expenditures 925,000 Construction Total Prior Funding Sources 925,000 Sewer Utility Fund Total 2015 2016 2017 2018 2019 Total 75,000 300,000 40,000 250,000 50,000 715,000 Total 75,000 300,000 40,000 250,000 50,000 715,000 2015 2016 2017 2018 2019 Total 75,000 300,000 40,000 250,000 50,000 715,000 Total 75,000 300,000 40,000 250,000 50,000 715,000 Budget Impact/Other I This project will decrease maintenance costs. Projects By Funding Source City of Chanhassen, MN 2015 thr•u 2019 Project# SWMP -019 Protect Name Street Improvement Projects - Storm Water Mgmt Department Surface Water Management Contact Paul Oehme Type Improvement Useful Life Unassigned Category SWMP Account #1 720 - 7025 -4751 Account #3 Priority n/a Account 92 Account 94 Description Total Project Cost. $1,775,000 kn annual amount set aside for storm water management infrastructure construction or expansion associated with street improvement projects mdertaken by the engineering and public works departments Justification Street improvement projects frequently require construction or expansion of storm water management infrastructure in order to comply with federal, state and local regulations, as well as protecting existing and proposed development adjacent to the projects Prior Expenditures 1 100 000 Construction Total 2015 2016 2017 2018 2019 Total 125,000 200,000 75 000 200 000 75,000 675,000 Total 125,000 200,000 75,000 200,000 75,000 675,000 Prior Funding Sources 2015 2016 2017 2018 2019 Total 1,100,000 Surface Water Utility Fund 125,000 200,000 75,000 200,000 75,000 675,000 Total Total 125,000 200,000 75,000 200,000 75,000 675,000 Budget Impact/Other nventory, inspection and maintenance of new infrastructure will be required Citywide No map Projects By Funding Source 2015 thru 2019 Department Water System Improvements City of Chanhassen, MN Contact Paul Oehme Project # W -024 Project Name Watermain Replacement Account #1 700- 7025 -4751 Account #2 Account #3 Account #4 Type Improvement Useful Life Unassigned Category Utilities Priority n/a Description Total Project Cost $4,270,000 Replacement of existing water main lines in coordination with the reconstruction of the City street projects or minor fixes of water distribution system for street rehabilitation projects Justification The City considers the condition of the existing utilities in the process to select streets for rehabilitation in an effort to realize cost savings by consolidating these projects and also to avoid potential cuts in recently improved streets If significant repairs are necessary to the existing water main, replacement may be the most cost effective option. Given the highly corrosive soils in the City, water main replacement is an ongoing project in the City Prior Expenditures 2,375,000 Construction Total Prior Funding Sources 2,375,000 Water Utility Fund Total 2015 2016 2017 2018 2019 Total 125,000 825,000 75,000 770,000 100,000 1,895,000 Total 125,000 825,000 75,000 770,000 100,000 1,895,000 2015 2016 2017 2018 2019 Total 125,000 825,000 75,000 770,000 100,000 1,895,000 Total 125,000 825,000 75,000 770,000 100,000 1,895,000 Budget Impact/Other Phese projects will decrease maintenance costs