US Bridges

FSR 231 over West Fork of Oak Creek

Good

Coconino County, Arizona · 6.9 MI E/O Sycamore Pt · Structure no. 030408000032690

Built
2017
8 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
56 ft
1 main span
Daily traffic
200
2021 count
Owner
Federal
U.S. Forest Service

About this bridge

FSR 231 over West Fork of Oak Creek is a wood or timber stringer/multi-beam or girder carrying FSR 231 over West Fork of Oak Creek in Coconino County, Arizona. It was built in 2017, so it is 8 years old, younger than the Arizona average of 47.8 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 299 by 2040. The structure is 56 ft (17 m) long and 16 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFSR 231
CrossesWest Fork of Oak Creek
Location6.9 MI E/O Sycamore Pt
RouteFederal Lands Road 231
StateArizona
Coordinates35.03344, -111.85575
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.5 US tons
Inventory rating36.4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length56 ft (17 m)
Longest span52 ft (15.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2021)
Projected traffic299 by 2040
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FSR 231 over West Fork of Oak Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is FSR 231 over West Fork of Oak Creek 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 April 2024.

How much traffic does FSR 231 over West Fork of Oak Creek carry?

About 200 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FSR 231 over West Fork of Oak Creek?

The structure is 56 ft (17 m) long with a longest span of 52 ft (15.8 m) and a deck 16 ft wide.

Who owns FSR 231 over West Fork of Oak Creek?

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