I-25 Sbl over Dry Muddy Creek
Natrona County, Wyoming · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-25 Sbl over Dry Muddy Creek in Natrona County, Wyoming, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1966, making it 59 years old at the 2025 inventory.
- It carries about 4,838 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 45 of the 135 inventoried bridges in Natrona County rated good (33.3%); 5 (3.7%) are rated poor.
- 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 → (42.83983, -106.16005)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 36 ft |
| Location | Douglas - Casper |
| NBI structure number | AHR |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wyoming department of transportation.
Busiest bridges in Natrona County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Wyo 220 over Garden Creek | 2001 | 26,351 | Fair |
| Wyo 220 over North Platte River | 1969 | 14,749 | Fair |
| Wyo 220 over BNSF Railway | 1969 | 14,641 | Fair |
| I-25 Sbl over North McKinley Street | 1958 | 12,618 | Fair |
| I-25 Nbl over North McKinley Street | 1958 | 12,577 | Fair |
| I-25 NBL and SBL over Walsh Drive | 2022 | 12,577 | Good |
All bridges nearby: Natrona County, WY bridge conditions · every bridge in Natrona County · Wyoming bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.