SH 99 over CR 603
Liberty County, Texas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 99 over CR 603 in Liberty County, Texas, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2020, making it 5 years old at the 2025 inventory.
- It carries about 4,000 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 126 of the 240 inventoried bridges in Liberty County rated good (52.5%); 4 (1.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2022, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (30.02773, -94.95931)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 117 ft |
| Location | 1.0 Mi NW CR 602 |
| NBI structure number | 201460351009305 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Liberty County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 59 over Atsf RR & Drain | 1987 | 35,560 | Good |
| US 59 over Sl 573 | 1987 | 33,938 | Good |
| US 59 over SL 573 & Ditch | 1987 | 29,958 | Fair |
| US 59 over Drainage Ditch | 1987 | 29,958 | Fair |
| US 59 Ml & Sbfr over Drainage Ditch | 1987 | 29,124 | Good |
| US 59 Ml & Sbfr over Little Tarkington Bayou | 1987 | 29,124 | Fair |
All bridges nearby: Liberty County, TX bridge conditions · every bridge in Liberty County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.