US Bridges

SR 112 over Hoko River

Fair

Clallam County, Washington · 11.8 E Makah Res · Structure no. 0003820A0000000

Built
1950
75 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
210 ft
1 main span
Daily traffic
1,031
2023 count
Owner
State
State Highway Agency

About this bridge

SR 112 over Hoko River is a concrete box beam or girders - multiple carrying SR 112 over Hoko River in Clallam County, Washington. It was built in 1950, so it is 75 years old, older than the Washington average of 49.8 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 1,031 vehicles a day, roughly 9% of them trucks, projected to reach 1,312 by 2039. The structure is 210 ft (64 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSR 112
CrossesHoko River
Location11.8 E Makah Res
RouteState Highway 112
CountyClallam County
StateWashington
Coordinates48.27389, -124.35641
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating21.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length210 ft (64 m)
Longest span120 ft (36.6 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,031 (2023)
Projected traffic1,312 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 112 over Hoko River built?

It was built in 1950, making it 75 years old in 2025.

What condition is SR 112 over Hoko River 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 August 2024.

How much traffic does SR 112 over Hoko River carry?

About 1,031 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 112 over Hoko River?

The structure is 210 ft (64 m) long with a longest span of 120 ft (36.6 m) and a deck 24 ft wide.

Who owns SR 112 over Hoko River?

It is owned by the State Highway Agency.