Ia 137 over Miller Creek
Monroe County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ia 137 over Miller Creek in Monroe County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1986, making it 39 years old at the 2025 inventory.
- It carries about 2,400 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 64 of the 131 inventoried bridges in Monroe County rated fair (48.9%); 29 (22.1%) 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 February 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (41.06007, -92.8031)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 28 ft |
| Location | 2.0 Mi. N of Jct. Ia 5 |
| NBI structure number | 000000000037481 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 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 Iowa department of transportation.
Busiest bridges in Monroe County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 5 (reloc) over over BNSF RR | 1995 | 9,400 | Fair |
| Ia 5 over Hocking Creek | 1973 | 4,780 | Good |
| Ia 137 over over UP RR | 1993 | 3,910 | Good |
| US 34 over Stream | 1962 | 3,900 | Fair |
| US 34 over Stream | 1959 | 3,900 | Fair |
| US 34 over Coal Creek | 1964 | 3,220 | Fair |
All bridges nearby: Monroe County, IA bridge conditions · every bridge in Monroe County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.