US Bridges

North Military Rd. over Olequa Creek

Good

Lewis County, Washington · 4.55 N JCT SR 505 · Structure no. 081313000000000

Built
1995
30 years old
Condition
Good
inspected December 2022
Type
Channel Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
2,252
2022 count
Owner
County
County Highway Agency

About this bridge

North Military Rd. over Olequa Creek is a prestressed concrete channel beam carrying North Military Rd. over Olequa Creek in Lewis County, Washington. It was built in 1995, so it is 30 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 2,252 vehicles a day, roughly 11% of them trucks, projected to reach 4,068 by 2042. The structure is 40 ft (12.2 m) long and 37 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNorth Military Rd.
CrossesOlequa Creek
Location4.55 N JCT SR 505
RouteCounty Highway 30062
CountyLewis County
StateWashington
Coordinates46.54369, -122.8865
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionDecember 2022
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 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 rating63.9 US tons
Inventory rating38 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,252 (2022)
Projected traffic4,068 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of relocation of road
Estimated improvement cost$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Military Rd. over Olequa Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is North Military Rd. over Olequa 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 December 2022.

How much traffic does North Military Rd. over Olequa Creek carry?

About 2,252 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is North Military Rd. over Olequa Creek?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 37 ft wide.

Who owns North Military Rd. over Olequa Creek?

It is owned by the County Highway Agency.