Brazoria County Bridge Report Card
Brazoria County scores 94 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Brazoria County, Texas
Brazoria County has 629 bridges in the National Bridge Inventory, with 14 rated poor and 5 rated scour-critical. Its poor-condition share of 2.2% is above the 1.2% statewide average. Poor-condition bridges carry about 20,142 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Brazoria County a Bridge Condition Exposure Score of 94/100 (A). The county has 629 bridges in the National Bridge Inventory, including 14 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 20,142 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 | 2.2% | 4.5 |
| Poor-condition traffic exposure | 25 | 0.4% of measured traffic | 0.3 |
| Scour-critical bridge share | 20 | 0.8% | 1.6 |
| Average age vs national baseline | 10 | 34 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 5,635,190 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 | 2.2% |
| State Poor-Condition Share | 1.2% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.8% |
| Average Bridge Age | 34 years |
| Poor-Condition Traffic Exposure | 20,142 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Brazoria County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| FM 2004 over Chocolate Bayou | Poor condition + traffic exposure | Poor | 6,263 | 1966 |
| FM 523 over Oyster Creek | Poor condition + traffic exposure | Poor | 5,336 | 1954 |
| FM 1495 over Old Brazos Riv/e 2nd/rr | Poor condition + traffic exposure | Poor | 4,793 | 1967 |
| CR 98 over Chigger Creek | Poor condition + traffic exposure | Poor | 825 | 1980 |
| CR 321 over Cedar Lake Creek | Poor condition + traffic exposure | Poor | 740 | 1993 |
| CR 171 (ave F) over Corner Bayou | Poor condition + traffic exposure | Poor | 720 | 1984 |
| Iowa LN over Brazos Riv Auth Canal | Poor condition + traffic exposure | Poor | 520 | 1988 |
| CR 383 over W Fork Choc Byu | Poor condition + traffic exposure | Poor | 210 | 1984 |
| Patterson RD over Mustang Bayou | Poor condition + traffic exposure | Poor | 160 | 1981 |
| CR 451a over Drainage Ditch | Poor condition + traffic exposure | Poor | 150 | 1980 |
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.