US Bridges

US 101 over Steamboat Creek

Good

Jefferson County, Washington · 7.8 N Grays Hbr CO · Structure no. 0019398C0000000

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
208 ft
1 main span
Daily traffic
1,151
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Steamboat Creek is a prestressed concrete stringer/multi-beam or girder carrying US 101 over Steamboat Creek in Jefferson County, Washington. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,151 vehicles a day, roughly 23% of them trucks, projected to reach 5,685 by 2038. The structure is 208 ft (63.4 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesUS 101
CrossesSteamboat Creek
Location7.8 N Grays Hbr CO
RouteU.S. Route 101
CountyJefferson County
StateWashington
Coordinates47.67974, -124.40264
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating61.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length208 ft (63.4 m)
Longest span202 ft (61.7 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,151 (2023)
Projected traffic5,685 by 2038
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
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$3.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Steamboat Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is US 101 over Steamboat 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 2023.

How much traffic does US 101 over Steamboat Creek carry?

About 1,151 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is US 101 over Steamboat Creek?

The structure is 208 ft (63.4 m) long with a longest span of 202 ft (61.7 m) and a deck 34 ft wide.

Who owns US 101 over Steamboat Creek?

It is owned by the State Highway Agency.