Agenda - Public Works Committee - 06/17/2025

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All seven of the geotechnical proposals were awarded to Independent Testing Technologies, Inc. Staff have marked soil boring locations on all projects and the contractor proposes to begin field work within the next 1 to 2 weeks. The geotechnical reports are due back between August 1 and September 30, 2025. The reports will be used to help determine the required pavement section, if any soil corrections will be anticipated, and if utility work will require special backfill or groundwater considerations. • Staff have prepared and issued an RFP for Sewer Cleaning and Televising professional services. Proposals are proposed to be returned to City staff by June 27, 2025. The proposals require the cleaning and televising to be performed within 30 working days of notice to proceed, which is generally anticipated to occur by mid -July 2025. Televising sanitary and storm sewer allows staff to determine if damaged pipes exist within the project area, and allows them to be addressed with the larger street reconstruction project. Anticipated Project Scopes IP 26-02 MSA Pavement Overlay Improvements: This project proposes to mill and overlay 173rd Avenue and 175th Avenue between Armstrong Boulevard (CSAH 83) and Nowthen Boulevard (CSAH 5). This is a 31-foot wide rural section street, totaling 3.05 miles in total length. The Average Daily Traffic (ADT) is between 800 and 1,200 and the speed limit is 55 mph. 173rd Avenue and 175th Avenue are Municipal State Aid (MSA) streets and must conform to MSA design standards, including meeting 10-ton pavement design standards and minimum lane widths. In general, improvements are proposed to include a 2-inch mill and overlay, with pavement markings being replaced in -kind. 173rd Avenue between Puma Street and Iguana Street (approximately 0.48 miles in length) crosses a wetland and County Ditch No.51. In the lower areas, the pavement along outside wheelpaths has rutted and broken up in the past, and these areas were filled with more bituminous pavement. During design, staff will explore options to rehab this stretch of 173rd Avenue. The existing culvert for County Ditch No.51 is a metal culvert with noted deterioration at the ends. Because the culvert is mostly underwater, the complete condition of the pipe can not be evaluated. Staff proposes to work with Anoka County for approval to replace this culvert with a reinforced concrete pipe as part of the project. No municipal water or sanitary sewer exists within the project area. Permitting requirements for this project will include MnDOT Municipal State Aid review, Anoka County Highway Department (ACHD) Right -of -Way permits for tie-ins at Armstrong Boulevard/CSAH 83 and Nowthen Boulevard/CSAH 5, ACHD review for the County Ditch No.51 culvert replacement, anticipated MnDNR and LRRWMO permits for wetland impacts if soil corrections are deemed necessary, and MnDNR dewatering permit for the culvert replacement. CIP level estimated project costs are $1,290,087 ($1,121,815 MSA Funds, $168,272 Storm Water Utility Funds). Project costs assume 1,000 lineal feet of soil corrections will be needed at wetlands given the previous pavement damage caused by poor soils. IP 26-03 Carol -Rose Acres and Sports Haven Street Reconstructions: This project proposes to reconstruct streets within the Carol -Rose Acres and Sports Haven subdivisions, generally located west of Variolite Street between 163rd Lane and 166th Avenue. The streets are 24-foot wide rural section, totaling 1.20 miles in length. Traffic counts have not been taken within the project area. However, there are no known destinations within the subdivision which would increase traffic above normal residential street volum. Drainage is handled through street crossing culverts and drainage swales, which generally carry storm water to an existing wetland located south of 16* Lane, west of Variolite Street. The streets within Carol -Rose Acres were constructed in 1980 and received an overlay in 1995. Ground Penetrating Radar (GPR) data shows an average pavement section of 7.6-inches, including 3.6-inches of bituminous and 4.0-inches of aggregate base. The streets within Sports Haven were constructed between 1980 and 1983 and received an overlay between 1995 and 1998. GPR data shows an average pavement section of 6.6-inches, including 4.1-inches of bituminous and 2.5-inches of aggregate base.