Bridge conditions in Platte County, Wyoming
159 inventoried bridges · 15 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Platte County tracks close to typical: 15 of its 159 inventoried bridges (9.4%) are rated poor, against a national rate of about 7%.
- 15 of the 159 bridges in Platte County, Wyoming, are rated in poor condition (9.4%) in the 2025 National Bridge Inventory, as of .
- 50 bridges (31.4%) are rated good and 94 (59.1%) fair.
- The median Platte County bridge was built in 1969.
- The busiest poor-rated bridge is I-25 Nbl over Machinery Pass (built 1966), carrying about 3,743 vehicles a day.
Good 31.4% · Fair 59.1% · Poor 9.4% of 159 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-25 Nbl over Machinery Pass | 1966 | 3,743 | Poor |
| I-25 Sbl over North Laramie River | 1966 | 3,568 | Poor |
| I-25 Nbl over Machinery Pass | 1972 | 3,563 | Poor |
| I-25 Sbl over Richeau Creek | 1958 | 3,350 | Poor |
| I-25 Sbl over N Antelope Creek Rd | 1958 | 3,350 | Poor |
| Cole Street over Rock / Wheatland Creek | 1979 | 979 | Poor |
| Pl Cnty Rd 275 over Rock / Wheatland Creek | 1975 | 371 | Poor |
| I-25 Service Road over Rock Creek | 1948 | 153 | Poor |
| E Hunton Creek Rd over I-25 | 1958 | 138 | Poor |
| 18th Street over Canal No 2 | 1978 | 138 | Poor |
| 10th Street over Canal No 2 | 1930 | 138 | Poor |
| Wyo 314 over I-25 | 1958 | 124 | Poor |
| Wyo 314 over Chugwater Creek | 1949 | 96 | Poor |
| I-25 Service Road over BNSF Railway | 1935 | 87 | Poor |
| Pl Cnty Rd 47 over North Laramie River | 1990 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 87 Bus over I-25 | 1975 | 6,322 | Good |
| US 26 over North Platte River | 1983 | 4,832 | Fair |
| I-25 NBL and SBL over Rock Creek | 1975 | 3,865 | Fair |
| I-25 Nbl over Machinery Pass | 1966 | 3,743 | Poor |
| I-25 Nbl over Laramie River | 1966 | 3,743 | Good |
| I-25 Nbl over Laramie River Road | 1966 | 3,743 | Fair |
| I-25 Nbl over North Laramie River | 1966 | 3,743 | Fair |
| I-25 Nbl over East Johnson Road | 1966 | 3,743 | Fair |
| I-25 Nbl over Fish Creek | 1966 | 3,743 | Fair |
| I-25 Nbl over US 26 | 1966 | 3,743 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Wyoming: Wyoming bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.