US Bridges

Harting Grade over South Touchet River

Good

Columbia County, Washington · 0.2 Miles W of JCT 13250 · Structure no. 086557000000000

Built
2000
25 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

Harting Grade over South Touchet River is a prestressed concrete stringer/multi-beam or girder carrying Harting Grade over South Touchet River in Columbia County, Washington. It was built in 2000, so it is 25 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 100 vehicles a day, roughly 20% of them trucks, projected to reach 150 by 2042. The structure is 102 ft (31.1 m) long and 29 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesHarting Grade
CrossesSouth Touchet River
Location0.2 Miles W of JCT 13250
RouteCounty Highway 12990
Coordinates46.2824, -117.95826
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating48.9 US tons
Inventory rating37.8 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span99 ft (30.2 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic150 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Harting Grade over South Touchet River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Harting Grade over South Touchet River 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 October 2024.

How much traffic does Harting Grade over South Touchet River carry?

About 100 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Harting Grade over South Touchet River?

The structure is 102 ft (31.1 m) long with a longest span of 99 ft (30.2 m) and a deck 29 ft wide.

Who owns Harting Grade over South Touchet River?

It is owned by the County Highway Agency.