US Bridges

SR 112 over Olsen Creek

Good

Clallam County, Washington · 7.3 E Makah Res · Structure no. 0019215A0000000

Built
2018
7 years old
Condition
Good
inspected August 2024
Type
Girder and Floorbeam System
Concrete
Length
55 ft
1 main span
Daily traffic
881
2023 count
Owner
State
State Highway Agency

About this bridge

SR 112 over Olsen Creek is a concrete girder and floorbeam system carrying SR 112 over Olsen Creek in Clallam County, Washington. It was built in 2018, so it is 7 years old, younger than the Washington average of 49.8 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 881 vehicles a day, roughly 9% of them trucks, projected to reach 1,121 by 2039. The structure is 55 ft (16.9 m) long and 35 ft wide.

CarriesSR 112
CrossesOlsen Creek
Location7.3 E Makah Res
RouteState Highway 112
Coordinates48.30574, -124.43476
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating57.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length55 ft (16.9 m)
Longest span51 ft (15.5 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic881 (2023)
Projected traffic1,121 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$893,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 112 over Olsen Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is SR 112 over Olsen 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 August 2024.

How much traffic does SR 112 over Olsen Creek carry?

About 881 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 112 over Olsen Creek?

The structure is 55 ft (16.9 m) long with a longest span of 51 ft (15.5 m) and a deck 35 ft wide.

Who owns SR 112 over Olsen Creek?

It is owned by the State Highway Agency.