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County seeks 13.8 additional county-state-aid miles to align road network with growth and planned projects
Summary
Scott County asked the board on May 6 to approve submitting a CSAH mileage request that would add roughly 13.8 miles to the county-state-aid highway system to reflect major planned projects including the CR 8 extension and a CR 15 realignment in New Prague.
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Scott County Highway Engineer Tony Wenneke briefed the Board of Commissioners on May 6 and sought support to submit a county-state-aid highway (CSAH) mileage request to the state screening board that would net about 13.8 additional miles to the county’s CSAH system.
Wenneke said the primary driver for the request is the Cassatt Road 8 extension (an east‑west principal-arterial connection between Trunk Highway 21 and Belle Plaine) and related alignment work on County Road 15 in New Prague. The request would also convert portions of County Road 79 to CSAH status and add segments of County Road 12 and County Road 60 while removing or phasing out redundant CSAH segments elsewhere. “By adding miles now at this time, we'd be able to use state aid funds for design, right-of-way and eventual construction,” Wenneke said.
Process and timing: Wenneke explained the August 1 submission deadline to the county-state-aid mileage subcommittee and the screening board review schedule (site review in August, screening-board decision in October). He emphasized that mileage additions require municipal acknowledgement and that the county will seek letters of support from cities including Belle Plaine, New Prague, Shakopee and others as appropriate.
Scope and phasing: The proposal lists several additions (notably CSAH 8 extension of about seven miles, CSAH 15 new alignment in New Prague, CSAH 12 extension) and removals (including a Belle Plaine segment to avoid redundancy once CSAH 8 is completed). The county’s request is intended as a phased, long-term system adjustment rather than an immediate reclassification of every segment.
Discussion vs. decision: The board received the briefing and Wenneke asked for the board’s support to submit the mileage request. Commissioners asked clarification questions about township notification, potential project phasing, and whether designation swaps would affect funding for planned work.
Next steps: County staff will coordinate formal city and township outreach, collect letters of acknowledgement, submit the request by the August 1 deadline, participate in the subcommittee review in August, and pursue screening-board approval in October. If approved, city and county resolutions to finalize designations will follow.

