BIA Route 3 over E-Spillway Coolidge Dam
PoorPosted for loadPinal County, Arizona · 19.2 KM SW San Carlos Az · Structure no. 00000000000H213
- Built
- 1928
- 97 years old, rebuilt 1995
- Condition
- Poor
- inspected October 2024
- Type
- Arch - Deck
- Concrete
- Length
- 174 ft
- 3 main spans
- Daily traffic
- 390
- 2021 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
BIA Route 3 over E-Spillway Coolidge Dam is a concrete arch - deck carrying BIA Route 3 over E-Spillway Coolidge Dam in Pinal County, Arizona. It was built in 1928 and reconstructed in 1995, so it is 97 years old, older than the Arizona average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for other load-capacity restriction.
It carries about 390 vehicles a day, roughly 2% of them trucks, projected to reach 456 by 2039. The structure is 174 ft (53 m) long and 31 ft wide. If it were closed, the detour would be 67.1 mi (108 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was BIA Route 3 over E-Spillway Coolidge Dam built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1995.
What condition is BIA Route 3 over E-Spillway Coolidge Dam in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.
How much traffic does BIA Route 3 over E-Spillway Coolidge Dam carry?
About 390 vehicles per day (2021 count), of which roughly 2% are trucks.
How long is BIA Route 3 over E-Spillway Coolidge Dam?
The structure is 174 ft (53 m) long with a longest span of 58 ft (17.7 m) and a deck 31 ft wide.
Who owns BIA Route 3 over E-Spillway Coolidge Dam?
It is owned by the Bureau of Indian Affairs.