US Bridges

SR 112 over Elwha River

Fair

Clallam County, Washington · 37.3 E JCT SR 113 · Structure no. 0009090A0000000

Built
1972
53 years old
Condition
Fair
inspected August 2024
Type
Arch - Deck
Concrete
Length
564 ft
1 main span
Daily traffic
5,764
2023 count
Owner
State
State Highway Agency

About this bridge

SR 112 over Elwha River is a concrete arch - deck carrying SR 112 over Elwha River in Clallam County, Washington. It was built in 1972, so it is 53 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 5,764 vehicles a day, roughly 7% of them trucks, projected to reach 7,078 by 2039. The structure is 564 ft (171.9 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSR 112
CrossesElwha River
Location37.3 E JCT SR 113
RouteState Highway 112
Coordinates48.10128, -123.55853
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating76.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20 + Mod
Structure length564 ft (171.9 m)
Longest span380 ft (115.8 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,764 (2023)
Projected traffic7,078 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$10.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 112 over Elwha River built?

It was built in 1972, making it 53 years old in 2025.

What condition is SR 112 over Elwha 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 Elwha River carry?

About 5,764 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 112 over Elwha River?

The structure is 564 ft (171.9 m) long with a longest span of 380 ft (115.8 m) and a deck 39 ft wide.

Who owns SR 112 over Elwha River?

It is owned by the State Highway Agency.