US Bridges

Sch. Lnd. Rd. Culv over Overflow Channel

Fair

Thurston County, Washington · 600 W Forstom St. · Structure no. 084865000000000

Built
1981
44 years old
Condition
Fair
inspected March 2023
Type
Culvert
Steel
Length
53 ft
3 main spans
Daily traffic
345
2021 count
Owner
County
County Highway Agency

About this bridge

Sch. Lnd. Rd. Culv over Overflow Channel is a steel culvert carrying Sch. Lnd. Rd. Culv over Overflow Channel in Thurston County, Washington. It was built in 1981, so it is 44 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 345 vehicles a day, roughly 10% of them trucks, projected to reach 533 by 2043. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSch. Lnd. Rd. Culv
CrossesOverflow Channel
Location600 W Forstom St.
RouteCounty Highway 14445
CountyThurston County
StateWashington
Coordinates46.82938, -123.12004
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating42 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHL 93
Structure length53 ft (16.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic345 (2021)
Projected traffic533 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$655,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sch. Lnd. Rd. Culv over Overflow Channel built?

It was built in 1981, making it 44 years old in 2025.

What condition is Sch. Lnd. Rd. Culv over Overflow Channel in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Sch. Lnd. Rd. Culv over Overflow Channel carry?

About 345 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Sch. Lnd. Rd. Culv over Overflow Channel?

The structure is 53 ft (16.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Sch. Lnd. Rd. Culv over Overflow Channel?

It is owned by the County Highway Agency.