US Bridges

Endictt-St JN/4230 over Palouse River

Fair

Whitman County, Washington · 8.35 MI SE SR 23 · Structure no. 079923000000000

Built
1950
75 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
241 ft
3 main spans
Daily traffic
176
2020 count
Owner
County
County Highway Agency

About this bridge

Endictt-St JN/4230 over Palouse River is a concrete continuous tee beam carrying Endictt-St JN/4230 over Palouse River in Whitman County, Washington. It was built in 1950, so it is 75 years old, older 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 5 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 176 vehicles a day, roughly 25% of them trucks, projected to reach 180 by 2039. The structure is 241 ft (73.5 m) long and 24 ft wide. If it were closed, the detour would be 39.1 mi (63 km).

Location

Open in Google Maps
CarriesEndictt-St JN/4230
CrossesPalouse River
Location8.35 MI SE SR 23
RouteCounty Highway 42300
CountyWhitman County
StateWashington
Coordinates46.99448, -117.6162
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 15
Structure length241 ft (73.5 m)
Longest span95 ft (29 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic176 (2020)
Projected traffic180 by 2039
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.1 mi (63 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$9.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Endictt-St JN/4230 over Palouse River built?

It was built in 1950, making it 75 years old in 2025.

What condition is Endictt-St JN/4230 over Palouse River 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 October 2023.

How much traffic does Endictt-St JN/4230 over Palouse River carry?

About 176 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Endictt-St JN/4230 over Palouse River?

The structure is 241 ft (73.5 m) long with a longest span of 95 ft (29 m) and a deck 24 ft wide.

Who owns Endictt-St JN/4230 over Palouse River?

It is owned by the County Highway Agency.