US Bridges

JORDAN-KNOTT/4010 over Rock Creek

Good

Whitman County, Washington · 0.48 MI S Davis · Structure no. 086125000000000

Built
1995
30 years old
Condition
Good
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
15
2021 count
Owner
County
County Highway Agency

About this bridge

JORDAN-KNOTT/4010 over Rock Creek is a prestressed concrete tee beam carrying JORDAN-KNOTT/4010 over Rock Creek in Whitman 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 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 15 vehicles a day, roughly 25% of them trucks, projected to reach 15 by 2044. The structure is 90 ft (27.4 m) long and 29 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesJORDAN-KNOTT/4010
CrossesRock Creek
Location0.48 MI S Davis
RouteCounty Highway 40100
CountyWhitman County
StateWashington
Coordinates47.07357, -117.93517
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating37.5 US tons
Inventory rating27.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length90 ft (27.4 m)
Longest span89 ft (27.1 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2021)
Projected traffic15 by 2044
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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$3.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was JORDAN-KNOTT/4010 over Rock Creek built?

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

What condition is JORDAN-KNOTT/4010 over Rock Creek 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 November 2023.

How much traffic does JORDAN-KNOTT/4010 over Rock Creek carry?

About 15 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is JORDAN-KNOTT/4010 over Rock Creek?

The structure is 90 ft (27.4 m) long with a longest span of 89 ft (27.1 m) and a deck 29 ft wide.

Who owns JORDAN-KNOTT/4010 over Rock Creek?

It is owned by the County Highway Agency.