18TH St over Wabash River
Cass County, Indiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 18TH St over Wabash River in Cass County, Indiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1977 and reconstructed in 2019, making it 48 years old at the 2025 inventory.
- It carries about 6,650 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 93 of the 187 inventoried bridges in Cass County rated fair (49.7%); 3 (1.6%) 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 June 2023, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (40.74293, -86.34623)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 653 ft |
| Location | 00.60 N of US 24 |
| NBI structure number | 0900082 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Cass County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 17 (3RD St) over Eel River | 1918 | 24,120 | Fair |
| Market Stold SR25 over Eel River | 2019 | 15,350 | Good |
| S Cicott St over Wabash River | 1994 | 12,500 | Fair |
| SR 25 over Wabash River S Crossing | 1988 | 12,389 | Good |
| SR 25 over Harvey Creek | 1918 | 9,061 | Good |
| 18TH Street over Trib Wabash River | 2017 | 8,875 | Good |
All bridges nearby: Cass County, IN bridge conditions · every bridge in Cass County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.