US Bridges

Fdr 374 over Caldwell Canyon

Fair

Yavapai County, Arizona · 5.5 MI NW Prescott Az · Structure no. 030903000003318

Built
1991
34 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
250
2022 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 374 over Caldwell Canyon is a prestressed concrete tee beam carrying Fdr 374 over Caldwell Canyon in Yavapai County, Arizona. It was built in 1991, so it is 34 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 250 vehicles a day, roughly 5% of them trucks, projected to reach 399 by 2040. The structure is 49 ft (15 m) long and 28 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

No coordinates are recorded for this structure.

CarriesFdr 374
CrossesCaldwell Canyon
Location5.5 MI NW Prescott Az
RouteFederal Lands Road 37
CountyYavapai County
StateArizona
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length49 ft (15 m)
Longest span47 ft (14.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic399 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$350,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 374 over Caldwell Canyon built?

It was built in 1991, making it 34 years old in 2025.

What condition is Fdr 374 over Caldwell Canyon in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Fdr 374 over Caldwell Canyon carry?

About 250 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Fdr 374 over Caldwell Canyon?

The structure is 49 ft (15 m) long with a longest span of 47 ft (14.4 m) and a deck 28 ft wide.

Who owns Fdr 374 over Caldwell Canyon?

It is owned by the U.S. Forest Service.