US Bridges

Irr:ridgecrest DR over Browns Slough

Fair

Bethel Census Area, Alaska · Mile Point 0.0 · Structure no. 4131

Built
1971
54 years old
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
24 ft
3 main spans
Daily traffic
2,380
2020 count
Owner
State
State Highway Agency

About this bridge

Irr:ridgecrest DR over Browns Slough is a steel culvert carrying Irr:ridgecrest DR over Browns Slough in Bethel Census Area, Alaska. It was built in 1971, so it is 54 years old, older than the Alaska average of 35.9 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 2,380 vehicles a day, roughly 6% of them trucks, projected to reach 4,010 by 2039. The structure is 24 ft (7.4 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIrr:ridgecrest DR
CrossesBrowns Slough
LocationMile Point 0.0
RouteState Highway 208
StateAlaska
Coordinates60.79837, -161.77641
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,380 (2020)
Projected traffic4,010 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Irr:ridgecrest DR over Browns Slough built?

It was built in 1971, making it 54 years old in 2025.

What condition is Irr:ridgecrest DR over Browns Slough 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 July 2024.

How much traffic does Irr:ridgecrest DR over Browns Slough carry?

About 2,380 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Irr:ridgecrest DR over Browns Slough?

The structure is 24 ft (7.4 m) long with a longest span of 6 ft (1.8 m).

Who owns Irr:ridgecrest DR over Browns Slough?

It is owned by the State Highway Agency.