CR 668 over Mustang Bayou
Brazoria County, Texas · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- CR 668 over Mustang Bayou in Brazoria County, Texas, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1984, making it 41 years old at the 2025 inventory.
- It carries about 45 vehicles a day (traffic count year 2017).
- Its listed owner is the county highway agency.
- It is one of 14 of the 629 inventoried bridges in Brazoria County rated poor (2.2%); 14 (2.2%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (29.44531, -95.27482)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 79 ft |
| Location | 0.20 Mi SW of CR 145 |
| NBI structure number | 120200AA0712001 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Brazoria County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 288 over Drainage Ditch | 1972 | 125,494 | Good |
| FM 523 over Old Oyster Creek | 1988 | 83,339 | Good |
| SH 288 NB over FM 2234 | 1990 | 59,850 | Fair |
| SH 288 over Drainage Ditch | 1972 | 56,525 | Fair |
| SH 288 SB over FM 2234 | 1990 | 54,353 | Good |
| SH 6 over Unnamed Channel | 2004 | 49,733 | Good |
All bridges nearby: Brazoria County, TX bridge conditions · every bridge in Brazoria County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.