SR-77 (4TH South) over UPRR and Future Ipa Line
Utah County, Utah · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR-77 (4TH South) over UPRR and Future Ipa Line in Utah 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 2010, making it 15 years old at the 2025 inventory.
- It carries about 29,985 vehicles a day (traffic count year 2014).
- Its listed owner is the state highway agency.
- It is one of 170 of the 274 inventoried bridges in Utah County rated fair (62.0%); 3 (1.1%) 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 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 → (40.16145, -111.63836)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 283 ft |
| Location | At 1450 W.on 4th So.St. |
| NBI structure number | 0F 769 |
| 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 Utah County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-15NB (SR-15) over American Fork Creek | 2011 | 209,636 | Fair |
| I-15NB (SR-15) over 100 E. in AMERICAN FORK | 2011 | 209,636 | Good |
| I-15NB (SR-15) over 300 West Street | 2011 | 209,636 | Fair |
| I-15SB (SR-15) over American Fork Creek | 2011 | 209,636 | Good |
| I-15SB (SR-15) over 100 E. in AMERICAN FORK | 2011 | 209,636 | Good |
| I-15 (SR-15) Sbl over 300 West Street | 2011 | 209,636 | Fair |
All bridges nearby: Utah County, UT bridge conditions · every bridge in Utah County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.