US Bridges

Stearns Hill Road over Bunker Creek

Good

Lewis County, Washington · 6.0 NW Adna · Structure no. 083457000000000

Built
1984
41 years old
Condition
Good
inspected February 2024
Type
Channel Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
9
2021 count
Owner
County
County Highway Agency

About this bridge

Stearns Hill Road over Bunker Creek is a prestressed concrete channel beam carrying Stearns Hill Road over Bunker Creek in Lewis County, Washington. It was built in 1984, so it is 41 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 9 vehicles a day, roughly 11% of them trucks, projected to reach 17 by 2041. The structure is 46 ft (13.9 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesStearns Hill Road
CrossesBunker Creek
Location6.0 NW Adna
RouteCounty Highway 24200
Coordinates46.66372, -123.14039
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating34 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (13.9 m)
Longest span43 ft (13.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9 (2021)
Projected traffic17 by 2041
Trucks11%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$648,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stearns Hill Road over Bunker Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Stearns Hill Road over Bunker 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 February 2024.

How much traffic does Stearns Hill Road over Bunker Creek carry?

About 9 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Stearns Hill Road over Bunker Creek?

The structure is 46 ft (13.9 m) long with a longest span of 43 ft (13.1 m) and a deck 31 ft wide.

Who owns Stearns Hill Road over Bunker Creek?

It is owned by the County Highway Agency.