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Gilpin County directs South Beaver Creek Road design toward recycled‑asphalt surface to balance cost and durability
Summary
After a JR Engineering presentation on four surfacing options and drainage/soft‑spot needs, commissioners directed staff to design South Beaver Creek Road using recycled asphalt pavement ("wrap"), phasing work by mile and continuing drainage/soft‑spot repairs; commissioners noted tradeoffs in cost, lifespan and vehicle speeds.
Gilpin County commissioners received a 60% design update from JR Engineering on the South Beaver Creek Road project and directed staff to proceed with recycled asphalt pavement ("wrap") as the preferred surface for the initial design.
What was presented: Eric Lee, project manager for JR Engineering, explained four surfacing alternatives — hot‑mix asphalt, chip seal, recycled asphalt pavement ("wrap"), and aggregate base course — and provided high‑level cost ranges that include excavation and subgrade replacement: asphalt (roughly $1.1–1.3 million per mile), chip seal ($800,000–$1 million per mile), recycled asphalt/wrap ($600,000–$700,000 per mile), and aggregate base course ($700,000–$800,000 per mile). Lee emphasized that these figures exclude some soft‑spot repair and drainage work estimates and that subgrade excavation (14–16 inches) drives a large portion of costs.
Board concerns and tradeoffs: Commissioners and public‑works staff discussed speed increases on smoother surfaces, maintenance frequency and specialized equipment needs. Public works noted that hot‑mix asphalt offers a 15‑year lifespan and the smoothest ride but can encourage higher speeds; wrap is less expensive and uses recycled materials but requires more frequent maintenance and periodic reapplication of rejuvenating agents (e.g., Reclamite).
Drainage and phasing: Staff stressed that drainage corrections and soft‑spot repairs are essential regardless of surface choice; total drainage work was estimated around $500,000 ($125,000 per mile) and soft‑spot repair estimates were discussed. The project will be designed in four phases (approximately one mile each) so work can proceed incrementally as funds become available. Commissioners asked for printed cost tables and slides, which staff agreed to provide.
Direction given: After weighing longevity, maintenance demands and budget constraints, commissioners indicated a leaning toward recycled asphalt (wrap) for the initial design and asked staff to complete final plans with that surface while preserving the option to upgrade if grant or other external funding becomes available.
Next steps: Staff will finalize the 100% design documents using the wrap surface, include drainage and soft‑spot repairs phased by mile, prepare bid‑ready plans, and continue to pursue grant funding opportunities that could support an asphalt upgrade in the future.
Ending: Commissioners emphasized the priority of addressing drainage and soft‑spot repairs first and directed staff to prepare the final design with recycled asphalt while documenting options if future funding allows an upgrade to hot‑mix asphalt.
