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Item No: 7J Meeting Date: December 8, 2014 Type of Business: Council Business Administrator Review: ____ City of Mounds View Staff Report To: Honorable Mayor and City Council From: Nick DeBar, Director of Public Works/City Engineer Item Title/Subject: Resolution 8348, Authorizing Professional Engineering Design and Preparation of Bidding Documents for Silver View Park Trail Rehabilitation Background/Discussion: The Silver View Park trail was originally constructed as a wood chip trail around the pond (Wood Lake) shortly after the pond was constructed. The City let a contract for converting the trail into an asphalt pavement trail in 1993. The specifications for that project required an 8-foot wide trail with 4-inches of aggregate base and 2-inches of asphalt. This was a typical pavement section for trails at that time. However, many of these trails have failed due to environmental degradation and the use and type of equipment maintaining or accessing the trail. In the case of Silver View Park, specifically around the pond, the trail has failed for all these reasons but primarily due to the underlying soils ability for support – which is related to an inferior original pavement design. In September 2014, American Engineering Testing, Inc. (AET) performed geotechnical and pavement evaluation services for the trail in Silver View Park. AET’s performed fourteen soil borings that found many areas with buried organics and wood chips. These materials are not conducive for subgrades of pavements, but removing them all would be cost prohibitive. AET recommends a typical pavement section of 6-inches of aggregate base with 3-inches of asphalt. In areas where wood chips and organics are encountered, AET recommends spot soil correction involving a combination of granular material, thicker aggregate base, and geotextile fabric. To ensure these locations are identified and corrected, the construction inspector will be a key person. Another issue with the current trail condition is that there are many areas where stormwater runoff drains over the pavement, prematurely degrading the pavement and creating ponding and icy conditions. There will need to be improvements to convey this runoff in the turf areas adjacent to the trail pavement and convey it below the pavement by means of piping to avoid the new pavement from degrading prematurely. Several other areas have grading issues that may require a small retaining wall and/or railing. On the south side of the east pond leg, the trail is situated on property owned by Scotland Green Apartment. Staff could not find any easements, limited use agreements, or other documentation that addressed this encroachment. However, County records were not searched and there may be a prescriptive easement implied. Records are spotty for this project since it was developed and management by the Parks and Recreation Department. Public Works Engineering is soliciting proposals from qualified consulting engineering firms based upon a Request for Proposal (RFP) document. The RFP contains background information and a work scope description for the entire project. Proposals are due to Public Works Engineering by noon, Monday, December 8, 2014. A summary of the proposals received and a recommendation will be presented at the Council Meeting that night.