FM over S Fork Maquoketa River
Jackson County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- FM over S Fork Maquoketa River in Jackson County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 2 (critical condition) on the 0-9 scale.
- It was built in 1982, making it 43 years old at the 2025 inventory.
- It carries about 80 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 36 of the 252 inventoried bridges in Jackson County rated poor (14.3%); 36 (14.3%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: superstructure 3 to 2.
- Status change: newly closed since 2024.
- Its most recent inspection on record is dated January 2025, on a 6-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.09007, -90.79746)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 3 | 2 | Critical condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel through truss |
| Length | about 170 ft |
| Location | 084e11303 |
| NBI structure number | 000000000191921 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | January 2025 |
| Inspection interval (item 91) | 6 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Jackson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 61 over Drainage Ditch | 1967 | 8,100 | Good |
| Y53 200TH Ave over Prairie Creek | 2022 | 7,205 | Good |
| US 61 NB over S Fork Maquoketa River | 1967 | 5,100 | Fair |
| US 61 SB over S Fork Maquoket River | 1998 | 5,100 | Fair |
| NB US 61 over Prairie Creek | 1967 | 4,600 | Fair |
| SB US 61 over Prairie Creek | 1996 | 4,600 | Good |
All bridges nearby: Jackson County, IA bridge conditions · every bridge in Jackson County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.