US Bridges

Lamoine RD over Douglas Creek Drainage

Good

Douglas County, Washington · 23.26N 23E · Structure no. 086160000000000

Built
1995
30 years old
Condition
Good
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
300
2019 count
Owner
County
County Highway Agency

About this bridge

Lamoine RD over Douglas Creek Drainage is a prestressed concrete tee beam carrying Lamoine RD over Douglas Creek Drainage in Douglas 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 300 vehicles a day, roughly 15% of them trucks, projected to reach 350 by 2040. The structure is 58 ft (17.7 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLamoine RD
CrossesDouglas Creek Drainage
Location23.26N 23E
RouteCounty Highway 9510
Coordinates47.72889, -119.89953
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 inspectionApril 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating55.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length58 ft (17.7 m)
Longest span55 ft (16.8 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2019)
Projected traffic350 by 2040
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed11.8 mi (19 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 substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lamoine RD over Douglas Creek Drainage built?

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

What condition is Lamoine RD over Douglas Creek Drainage 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 April 2023.

How much traffic does Lamoine RD over Douglas Creek Drainage carry?

About 300 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Lamoine RD over Douglas Creek Drainage?

The structure is 58 ft (17.7 m) long with a longest span of 55 ft (16.8 m) and a deck 36 ft wide.

Who owns Lamoine RD over Douglas Creek Drainage?

It is owned by the County Highway Agency.