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Douglas County‑led County Line/Kennywood widening awarded; Centennial sees two‑year construction window
Summary
Douglas County received low bid of $29,170,000 for the County Line/Kennywood Road segment; Centennial staff said the project includes a new signal at Clarkson, temporary traffic impacts and a roughly two‑year construction duration starting after CDOT clearances, likely in July.
City staff told the Centennial City Council on May 13 that the County Line Road/Kennywood Road widening project, led by Douglas County, is closer to construction after a low bid below the engineer’s estimate.
Public Works Director Jeff Dankenbrenner said Douglas County advertised the project and received nine bids; the apparent low bidder was TWX with a bid of $29,170,000 versus the engineer’s estimate of $31,420,000. Staff said the lower bid was encouraging amid broader construction cost uncertainty.
The project limits run from Broadway on the west to University on the east; the segment is the last portion under Centennial jurisdiction before Littleton. The work includes a new traffic signal at Clarkson to address a long‑standing District‑1 request, filling low spots, and closing Arapahoe Road in a segment during construction.
Dankenbrenner told council that Douglas County must complete its award and obtain CDOT clearances before construction begins; staff still anticipate work starting in July. Council asked about duration; Dankenbrenner said construction would take about two years.
Staff warned of temporary detours through Clarkson neighborhood streets while the County closes a portion of Arapahoe Road for the project. Noise walls are part of the mitigation package on the north side for Canyon Line Road traffic, but staff said the walls will not mitigate noise from C‑470 and that they will be placed close to the highway right‑of‑way with fence adjustments so residents do not have a no‑man’s‑land between back fences and the wall.
Because Douglas County is the lead agency for the contract, residents with questions should consult Douglas County’s project web page, staff said. Centennial will coordinate with property owners about temporary fencing and other construction impacts on the city‑owned portion of the corridor.
