Clark St over Ia 163
Marion County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Clark St over Ia 163 in Marion County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1994, making it 31 years old at the 2025 inventory.
- It carries about 6,400 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 107 of the 217 inventoried bridges in Marion County rated fair (49.3%); 28 (12.9%) 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 May 2023, 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 → (41.38887, -92.91356)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 243 ft |
| Location | 2.5 Mi. E of SR G-28. |
| NBI structure number | 000000000601440 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Marion County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR G28 over Ia 163 | 1994 | 10,500 | Good |
| Idaho Dr over Ia 163 | 1994 | 5,322 | Good |
| SB Ia 5 & EB 92 over White Breast Creek | 1965 | 4,200 | Fair |
| NB Ia 5 & WB 92 over White Breast Creek | 1978 | 4,200 | Fair |
| Ia 92 EB & Ia 5 SB over 135TH Place | 1978 | 3,950 | Good |
| Ia 92 WB & Ia 5 NB over 135TH Place | 1978 | 3,950 | Good |
All bridges nearby: Marion County, IA bridge conditions · every bridge in Marion County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.