Dam Crest Road over Anderson Ranch Dam Spwy
GoodElmore County, Idaho · Anderson Ranch Dam · Structure no. 15AND001
- Built
- 1950
- 75 years old
- Condition
- Good
- inspected September 2023
- Type
- Tee Beam
- Concrete
- Length
- 55 ft
- 2 main spans
- Daily traffic
- 100
- 2023 count
- Owner
- Federal
- Bureau of Reclamation
About this bridge
Dam Crest Road over Anderson Ranch Dam Spwy is a concrete tee beam carrying Dam Crest Road over Anderson Ranch Dam Spwy in Elmore County, Idaho. It was built in 1950, so it is 75 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 100 vehicles a day, roughly 15% of them trucks, projected to reach 100 by 2043. The structure is 55 ft (16.8 m) long and 27 ft wide. If it were closed, the detour would be 68.4 mi (110 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Dam Crest Road over Anderson Ranch Dam Spwy built?
It was built in 1950, making it 75 years old in 2025.
What condition is Dam Crest Road over Anderson Ranch Dam Spwy in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.
How much traffic does Dam Crest Road over Anderson Ranch Dam Spwy carry?
About 100 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is Dam Crest Road over Anderson Ranch Dam Spwy?
The structure is 55 ft (16.8 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.
Who owns Dam Crest Road over Anderson Ranch Dam Spwy?
It is owned by the Bureau of Reclamation.