Grand County Bridge Report Card
Grand County scores 79 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Grand County, Colorado
Grand County has 88 bridges in the National Bridge Inventory, with 5 rated poor and 1 rated scour-critical. Its poor-condition share of 5.7% is above the 4.6% statewide average. Poor-condition bridges carry about 20,042 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Grand County a Bridge Condition Exposure Score of 79/100 (C). The county has 88 bridges in the National Bridge Inventory, including 5 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 20,042 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 5.7% | 11.4 |
| Poor-condition traffic exposure | 25 | 10.3% of measured traffic | 7.7 |
| Scour-critical bridge share | 20 | 1.1% | 2.3 |
| Average age vs national baseline | 10 | 40 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 193,976 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 5.7% |
| State Poor-Condition Share | 4.6% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.1% |
| Average Bridge Age | 40 years |
| Poor-Condition Traffic Exposure | 20,042 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Grand County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| US 40 Ml over Crooked Creek | Poor condition + traffic exposure | Poor | 11,000 | 1941 |
| US 34 Ml over Stillwater Creek | Poor condition + traffic exposure | Poor | 4,900 | 1938 |
| SH 9 Ml over Up Rr | Poor condition + traffic exposure | Poor | 3,500 | 1942 |
| Wapiti Street over Fraser River | Poor condition + traffic exposure | Poor | 640 | 1996 |
| Holzwarth Access R over Colorado River | Poor condition + traffic exposure | Poor | 2 | 1982 |
| Lions Gate Drive over Vasquez Creek | Scour-critical foundation rating | Good | 703 | 1996 |
| US 40 Ml over Vasquez Creek | High traffic | Fair | 11,000 | 1938 |
| US 40 Ml over Fraser River | High traffic | Fair | 11,000 | 1942 |
| US 40 Ml over Up Rr | High traffic | Fair | 11,000 | 1985 |
| US 40 Ml over Fraser River | High traffic | Fair | 11,000 | 1985 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.