Adopt Resolution #17-01-029 Accepting Feasibility Report/Ordering Plans and Specifications for Improvement Project #17-01, Alpine Drive Reconstruction Please Note:  Moved from Consent 4.10 - Called out as 7.08A by Council.  Due to software limitations unable to make it an "A" thus two cases 7.08.

Purpose:
The purpose of this case is to adopt Resolution #17-01-029 accepting the Feasibility Report and authorizing the preparation of Plans and Specifications for Improvement Project #17-01, Alpine Drive Reconstruction.

Background:
City Improvement Project 17-01 proposes to reconstruct Alpine Drive between Armstrong Boulevard/CSAH 83 and Variolite Street which totals approximately 3,600 linear feet (0.68 miles) in length.  A map showing the location and scope of the proposed improvements is included in the attached Feasibility Report as Figure 1 in Appendix A.
 
Based on record plans, this segment of Alpine Drive was constructed in 2001 with 3.5 inches bituminous pavement, 6 inches class 5 aggregate base, B618 concrete curb and gutter, and concrete storm sewer.  However, field observations show that the 6 inch class 5 aggregate base was substituted with roughly 5 inches of recycled crushed concrete base.  No information on the reason for this substitution could be found.  The street was constructed to a width of 32 feet from face-of-curb to face-of-curb in locations where parking is restricted, and to 38 feet from face-of-curb to face-of-curb in locations where parking is allowed along one side.  Alpine Drive is centered within an 80 foot wide right-of-way.  The storm sewer system consists of numerous catch basins which drain runoff from the street to adjacent low-lying areas using concrete storm sewer pipes.
 
City staff evaluates and rates the condition of pavement sections on all city streets on an annual basis using the Pavement and Surface Evaluation Rating (PASER) system.  In the fall of 2016, the pavement section of the above-referenced street segment were rated with a PASER rating of 3 which indicates this street is past the point of applying mill and overlay improvements. The current condition of this street requires City staff to patch the street at least once per year, particularly before winter so the street can be plowed without tearing up the pavement in the process.  Pictures of the street are located in Appendix A of the attached Feasibility Report.
 
Proposed improvements include removing and replacing damaged sections of concrete curb and gutter and reconstructing the existing bituminous pavement section using a process known as Full Depth Reclamation, or FDR.  This process would involve reclaiming the entire existing bituminous pavement section along with the existing recycled concrete base material.  A portion of this reclaimed (ground and mixed) material would then be spread and compacted on top of the reshaped and compacted subgrade.  Then 3.5 inches of bituminous pavement would be placed, resulting in a 10-ton pavement design meeting current State Aid standards.
 
The existing storm sewer system is in good condition and generally meets current State Aid design standards and therefore requires only minimal improvements including three catch basins and about 100 feet of pipe. An off-street bike trail exists along the south side Alpine Drive but is in relatively good condition and is not proposed to be improved as part of this project.
 
The engineer’s opinion of probable costs for completing the proposed improvements on Alpine Drive as outlined in this report is $463,000.  Estimated costs include 23% indirect costs for administrative, engineering, finance and legal costs.  A summary of the engineer’s opinion of probable costs is included in Appendix B of the attached Feasibility Report.
 
No parcels have been identified as receiving special benefit from the improvements so the use of special assessments as a funding source for this project is not proposed.

A total of four pavement corings were completed by WSB and Associates (WSB) to assist with the preparation of this report.  In addition, thirteen soil borings were completed by Northern Technologies, Inc. (NTI).  Both firms offered pavement design recommendations which were considered and incorporated to varying degrees while preparing this report. Copies of WSB’s and NTI’s reports are attached in Appendix C of the attached Feasibility Report.
 
This improvement project, which is listed in the City’s current Capital Improvement Program, is proposed to be funded using a combination of street reconstruction bond proceeds and stormwater utility funds.
 
Staff has not yet had an opportunity to discuss the proposed improvements with local property owners.  However, upon Council acceptance of this report Staff will immediately contact local property owners for the purpose of explaining the proposed improvements and to request a meeting to discuss the proposed improvements in more detail and to gather their input on the project, including any information that should be explored in more detail during development of plans and specifications. Staff will then present this information to Council at the time plans and specifications are presented to Council for approval.
 
This project would best be constructed as a stand-alone project and is necessary, feasible, and cost-effective from an engineering standpoint, and can be constructed as proposed in the attached Feasibility Report.

No notifications are required for this case.

Observations:
The proposed pavement design should result in a minimum pavement life of 30 years, assuming that proactive, regular pavement maintenance treatments are performed during the life of the pavement.  While a 60-year design life would typically be targeted for a reconstructed street, this project is not proposing a full reconstruction due to the good condition of the majority of existing 15 year old curb and gutter.  Therefore, only the recycled concrete base and bituminous sections are proposed to be reconstructed now as it may make sense to consider replacing the pavement section again at the time the rest of the existing curb and gutter is replaced at the end of its useful life 35 or more years into the future.
 
Developed properties along the project corridor may have private irrigation systems.  However, impacts to these systems would only occur if the existing curb and gutter is being removed and replaced.  In the past, the City has typically repaired private irrigation systems that are damaged as part of a street reconstruction project.  However, staff is requesting Council permission to change this practice on all future projects by instead notifying property owners of pending construction at least 15 business days in advance to allow them time to move their irrigation systems out of harm’s way before work begins.  Plans and specifications will therefore not be developed with a bid item for repairing private irrigation systems.

Alternatives:
Alternative Action #1 – Motion to adopt Resolution #17-01-029 accepting the Feasibility Report and authorizing Plans and Specifications for Improvement Project #17-01, Alpine Drive Reconstruction.

City staff prepared the Feasibility Report in-house as part of staff’s normal duties.
 
NTI prepared the Geotechnical Exploration and Engineering Review at a cost of $4,400.  WSB and Associates, Inc. prepared the Pavement Evaluations and Recommendations at the not-to-exceed cost of $2,687.50.
 
The 2016 - 2020 CIP includes a 2017 estimated project cost of $793,600 for the reconstruction of Alpine Drive between Armstrong Boulevard/CSAH 83 and Variolite Street.  The estimated cost for reconstructing Alpine Drive per the attached Feasibility Report is $463,000.

No special assessments are proposed with this project.  The City will be responsible for all project costs as outlined in the Feasibility Report.

Staff recommends selecting Alternative Action #1 to allow the project to be developed in a timely manner for construction in 2017.

Motion to adopt Resolution #17-01-029 accepting the Feasibility Report and authorizing Plans and Specifications for Improvement Project #17-01, Alpine Drive Reconstruction.