US Bridges

JENNINGS/9100 over South Fork Palouse River

FairPosted for load

Whitman County, Washington · 0.05 MI S Sand · Structure no. 083064000000000

Built
1914
111 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Concrete
Length
43 ft
1 main span
Daily traffic
3
2023 count
Owner
County
County Highway Agency

About this bridge

JENNINGS/9100 over South Fork Palouse River is a concrete stringer/multi-beam or girder carrying JENNINGS/9100 over South Fork Palouse River in Whitman County, Washington. It was built in 1914, so it is 111 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. Its operating status is: posted for load restriction.

It carries about 3 vehicles a day, roughly 25% of them trucks, projected to reach 4 by 2042. The structure is 43 ft (13.1 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesJENNINGS/9100
CrossesSouth Fork Palouse River
Location0.05 MI S Sand
RouteCounty Highway 91000
Coordinates46.68125, -117.10097
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3 (2023)
Projected traffic4 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was JENNINGS/9100 over South Fork Palouse River built?

It was built in 1914, making it 111 years old in 2025.

What condition is JENNINGS/9100 over South Fork 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 January 2025.

How much traffic does JENNINGS/9100 over South Fork Palouse River carry?

About 3 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is JENNINGS/9100 over South Fork Palouse River?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 22 ft wide.

Who owns JENNINGS/9100 over South Fork Palouse River?

It is owned by the County Highway Agency.