Dunn Countys highway department presented two SourceWell-contracted proposals July 9 for a new salt-storage shed at the Boyesville location and the committee approved moving forward with the BrightSpan/Greystone-style hoop building that staff recommended.

Staff said Wisconsin Department of Transportation funding would cover the structure cost and that the proposals differ principally in foundation approach and exterior details. The structures-unlimited (Calhoun) option uses precast concrete sidewalls and attaches the roof to those walls; the BrightSpan/Greystone option uses piled/piers with precast panels set onto the foundation and would include a metal sliding end door so the county could close the open end when not in use. Staff said the new building would increase capacity from the existing 300-ton wooden shed to a 1,000-ton capacity facility and that the county would provide site prep, base gravel and pavement, and final backfill.

Staff estimated the WisDOT funding allocation at approximately $310,000 and said county additional costs for site work are expected but manageable; staff also noted a modest additional county cost (roughly $15,000-$20,000) for the Greystone options foundation work. Committee members expressed a preference for the Greystone/BrightSpan design because the metal end wall would reduce the need to cover stored material and make the structure less vulnerable to debris and spillage, and a motion to proceed with the Greystone proposal passed.

Staff said construction could start this year subject to scheduling and that county crews would handle site preparation and paving. The committee authorized moving forward with the selected vendor through the SourceWell procurement route and directed staff to coordinate installation logistics with WisDOT funding and county operations.