Center Access Road over Mud Slough
Merced County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Center Access Road over Mud Slough in Merced County, California, 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 1990 and reconstructed in 2001, making it 35 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2024).
- It is one of 314 of the 532 inventoried bridges in Merced County rated fair (59.0%); 23 (4.3%) are rated poor.
- 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 → (37.26367, -120.90617)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Steel girder and floorbeam |
| Length | about 84 ft |
| Location | Refuge Access RD/PRK.LOT3 |
| NBI structure number | 000011651-00163 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Merced County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 99 over Turlock Canal | 1935 | 65,000 | Fair |
| State Route 99 NB over 15TH Street | 1962 | 51,000 | Fair |
| State Route 99 over West 16TH St UP RR | 2013 | 51,000 | Fair |
| State Route 99 over UPRR & 16TH Street | 2015 | 51,000 | Fair |
| State Route 99 over Athlone Drain | 2015 | 39,000 | Good |
| State Route 99 SB over El Capitan Way | 1980 | 37,000 | Fair |
All bridges nearby: Merced County, CA bridge conditions · every bridge in Merced County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.