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Item No: 7I 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 8347, Authorizing Preparation of Feasibility Report for Mustang Drive Pavement Rehabilitation and Drainage Improvements Project Background/Discussion: Mustang Drive/Mustang Circle is a dead-end local municipal street segment located off Old Highway 8 in the southernmost part of Mounds View. This street segment serves eleven industrial and commercial properties in the Mounds View Industrial Parks No. 1-3 and Midway Industrial plat additions. Many of these properties have large numbers of semi-truck traffic entering and exiting Mustang Drive/Circle and include freight distribution centers. Maintaining access to and limiting interruptions for these properties during construction is important and may require a phased approach. Pavement Improvements Mustang Drive is approximately 1,550 feet in length and Mustang Circle is approximately 610 feet in length with a 135-foot diameter cul-de-sac. Both segments have concrete curb and gutter (Mn/DOT Design B618) with a bituminous pavement surface measuring 36-feet wide (lip-to-lip of gutter). Mustang Drive was originally constructed in 1974 and Mustang Circle in 1979. Maintenance includes a seal coat in 1994 and pothole patching and skim coating. The current pavement is in poor condition with significant surface patching, potholes, and moderate to high severity traverse cracking. Curb and gutter is in fair to good condition. In late 2011, American Engineering Testing, Inc. (AET) performed geotechnical and pavement evaluation services on behalf of the City for Mustang Drive/Circle. AET’s ten pavement cores showed bituminous pavement thickness ranging from 4.25 to 7.5 inches and found stripping at multiple layer interfaces. AET recommends a pavement rehabilitation design (10-ton, 20-year ESAL of 2,000,000) as follows: 1. Mill bituminous surface to a depth of 3 inches; 2. Perform stabilized full depth reclamation to a depth of 6 inches asphalt/aggregate base; 3. Place 3.5 inches of bituminous wearing course in 2 lifts (Mix SPWEB440F). AET provided an alternative design option for Mustang Circle due to its better condition than Mustang Drive: 1. Mill bituminous surface to a depth of 3 inches; 2. Place 3 inches of bituminous wearing course in 2 lifts. There may be some sections of curb and gutter needing replacement or correction, however, the majority of curb and gutter is expected to remain undisturbed. Storm Drainage Improvements Street flooding at the intersection of Mustang Drive and Mustang Circle occurs on a frequent basis. This intersection is the low point on Mustang Drive and is the only location where drain inlets exist. An area of approximately 16.7 acres of the industrial park drains to these intersection inlets. Actual flooding is caused by the existing storm sewer system being unable to accommodate runoff from storm events as frequent as every one year. Flooding from these frequent storms cause