US Bridges

Jantz RD over Rocky Coulee

FairPosted for load

Adams County, Washington · 02.10 MI S Davis RD · Structure no. 081795000000000

Built
1950
75 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
19
2018 count
Owner
County
County Highway Agency

About this bridge

Jantz RD over Rocky Coulee is a steel stringer/multi-beam or girder carrying Jantz RD over Rocky Coulee in Adams 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 6 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 19 vehicles a day, roughly 2% of them trucks, projected to reach 24 by 2039. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesJantz RD
CrossesRocky Coulee
Location02.10 MI S Davis RD
RouteCounty Highway 75004
CountyAdams County
StateWashington
Coordinates47.23091, -118.64284
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span29 ft (8.7 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19 (2018)
Projected traffic24 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jantz RD over Rocky Coulee built?

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

What condition is Jantz RD over Rocky Coulee 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 2024.

How much traffic does Jantz RD over Rocky Coulee carry?

About 19 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Jantz RD over Rocky Coulee?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.7 m) and a deck 24 ft wide.

Who owns Jantz RD over Rocky Coulee?

It is owned by the County Highway Agency.