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County approves $156,455 roof replacement and $86,160 partial hydronic snow‑melt installation for county facilities
Summary
The Pennington County Board of Commissioners awarded a $156,455 contract to Black Hills Exteriors for the Public Safety Building roof replacement and approved a partial hydronic snow‑melt system install at 900 Concourse for $86,160 to be installed by SECO, with the county to complete interior mechanical work later.
Pennington County commissioners approved two Buildings & Grounds projects at their April 15 meeting: a roof-replacement contract for the Public Safety Building and a partial installation of a hydronic snow‑melt system at the 900 Concourse front entrance.
Davis Purcell, Buildings & Grounds director, told the Board the current roof is roughly 18–19 years old and initially the project had been scoped for a full tear-off. Staff recommended replacing the existing PVC membrane with an 80-mil PVC membrane, replacing damaged insulation and wood blocking as necessary, and installing pressure-equalizing vents to address over-pressurization issues rather than adding a vapor barrier.
“We did go out to bid a few weeks back and the low bid was Black Hills Exteriors,” Purcell said. Commissioner Adcock noted early cost estimates ranged from $200,000 to $300,000 but the low bid came in at $156,455; he moved to authorize the award accordingly.
Purcell also described two options for a hydronic (glycol) snow‑melt system at the 900 Concourse main entrance: Option 1 would demo stoops and sidewalks, install PEX piping under new concrete and stub piping into the building for future tie-in; Option 2 would include full mechanical installation (boiler, pumps, controls). Purcell recommended Option 1 to reduce immediate cost and to allow Buildings & Grounds to install interior mechanicals later.
Commissioners approved Option 1, with the motion specifying an $86,160 installation by SECO and future completion of boilers/pumps by county staff. Purcell said piping material would be PEX with glycol to prevent freeze under slab and that boilers would be gas-fired and could be placed in a custodial storage area within the building.
Why it matters: The roof replacement addresses an aging membrane on an occupied county facility used for public safety operations; the snow‑melt system reduces winter maintenance needs and improves ADA access at a north-facing entrance that receives no winter sunlight.
What’s next: Buildings & Grounds will finalize contracts, schedule SECO installation, and plan the interior mechanical work for later phases. Staff noted funding will come from the Buildings & Grounds capital improvement fund and that the department is tracking contingency usage across the larger concourse remodel project.
