Knolls Int.x-rd. over I-80 (SR-80) Ebl
Tooele County, Utah · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Knolls Int.x-rd. over I-80 (SR-80) Ebl in Tooele County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 80 vehicles a day (traffic count year 2012).
- Its listed owner is the state highway agency.
- It is one of 31 of the 35 inventoried bridges in Tooele County rated fair (88.6%); 0 (0.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: superstructure 7 to 6, substructure 7 to 6.
- Its most recent inspection on record is dated September 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 → (40.72647, -113.25872)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 166 ft |
| Location | Knolls Interchange |
| NBI structure number | 0F 219A |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| 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 Utah department of transportation.
Busiest bridges in Tooele County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 Ramp to SR 36 over I-80 Mainline | 2020 | 32,000 | Good |
| SR-36 over Union Pacific Railroad | 1980 | 26,235 | Fair |
| I-80 (SR-80) Ebl over County Road & UPRR | 1972 | 10,860 | Fair |
| I-80 (SR-80) Wbl over County Road and UPRR | 1972 | 10,860 | Fair |
| SR-201 Ebl Ramp over Union Pacific Railroad | 1991 | 9,549 | Fair |
| SR-201 Wbl On-ramp over I-80 (SR-80) & UPRR | 1991 | 9,549 | Fair |
All bridges nearby: Tooele County, UT bridge conditions · every bridge in Tooele County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.