S.H. 99 / U.S. 377 over Lake Texoma (red River)
Marshall County, Oklahoma · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S.H. 99 / U.S. 377 over Lake Texoma (red River) in Marshall County, Oklahoma, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2022, making it 3 years old at the 2025 inventory.
- It carries about 2,700 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 41 of the 79 inventoried bridges in Marshall County rated good (51.9%); 9 (11.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: superstructure 8 to 7.
- Its most recent inspection on record is dated August 2024, on a 24-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 → (33.87694, -96.83389)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 5,459 ft |
| Location | Tex/okla State Line |
| NBI structure number | 317510000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Marshall County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 70 over Whiskey Creek | 1933 | 10,200 | Fair |
| S.H. 199 over Glasses Creek | 1960 | 8,600 | Fair |
| S.H. 99 over Whiskey Creek | 1960 | 6,700 | Fair |
| U.S. 70 over Little Glasses Creek | 1946 | 6,300 | Fair |
| U.S. 70 over Creek | 1958 | 6,300 | Good |
| U.S. 70 over Creek | 1935 | 6,200 | Good |
All bridges nearby: Marshall County, OK bridge conditions · every bridge in Marshall County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.