US Bridges

Anderson Road over Curtis Creek

Good

Lewis County, Washington · 3.8 SW Winlock · Structure no. 088343000000000

Built
2009
16 years old
Condition
Good
inspected March 2024
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
36
2021 count
Owner
County
County Highway Agency

About this bridge

Anderson Road over Curtis Creek is a concrete frame carrying Anderson Road over Curtis Creek in Lewis County, Washington. It was built in 2009, so it is 16 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 36 vehicles a day, roughly 19% of them trucks, projected to reach 65 by 2041. The structure is 26 ft (7.9 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesAnderson Road
CrossesCurtis Creek
Location3.8 SW Winlock
RouteCounty Highway 37250
Coordinates46.47325, -122.95942
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum 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 rating82 US tons
Inventory rating48.9 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2021)
Projected traffic65 by 2041
Trucks19%
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$272,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Anderson Road over Curtis Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Anderson Road over Curtis 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 March 2024.

How much traffic does Anderson Road over Curtis Creek carry?

About 36 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is Anderson Road over Curtis Creek?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns Anderson Road over Curtis Creek?

It is owned by the County Highway Agency.