Road & Bridge builds culvert inventory and urges continued bridge funding as grants cover big projects

Bonner County Road & Bridge staff described work to inventory culverts and said bridge maintenance remains a significant, ongoing county responsibility even as state and federal grants fund major bridge replacements.

Why it matters: Infrastructure condition is a long‑term county liability. Staff said a GIS‑based culvert and condition database now lets the department track inlet/outlet photos, GPS locations and condition ratings to prioritize repairs and capture institutional knowledge.

Most important facts: Staff said the county has roughly 5,000 culverts in its system and has begun tagging each with location, condition and photographs. They also said Bonner County has 39 county bridges and that recent grant awards have directed roughly $28 million toward local bridge projects; those grants pay for large replacements but the county remains responsible for maintaining smaller bridges and some bridge repairs.

Discussion and options: Staff said the new culvert inventory improves project planning and supports grant applications. They recommended retaining or increasing a small county bridge maintenance line (the department uses a $50,000 nominal bridge‑maintenance allocation) because local match and smaller, non‑grantable repairs remain the county's responsibility. Staff also described recent experiments with polymer‑coated culvert materials on deep spans to extend life expectancy.

What was not decided: No reallocation of bridge maintenance funds was adopted. Staff said they will return with condition summaries and a prioritized list of immediate culvert/bridge repairs for board consideration.