US Bridges

Jackson Road over Rock Creek

Fair

Spokane County, Washington · 4.0 S Freeman · Structure no. 083108000000000

Built
1960
65 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
92 ft
2 main spans
Daily traffic
64
2020 count
Owner
County
County Highway Agency

About this bridge

Jackson Road over Rock Creek is a prestressed concrete tee beam carrying Jackson Road over Rock Creek in Spokane County, Washington. It was built in 1960, so it is 65 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.

It carries about 64 vehicles a day, roughly 34% of them trucks, projected to reach 92 by 2042. The structure is 92 ft (28 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesJackson Road
CrossesRock Creek
Location4.0 S Freeman
RouteCounty Highway 2103
CountySpokane County
StateWashington
Coordinates47.46882, -117.19565
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.4 US tons
Inventory rating15 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length92 ft (28 m)
Longest span44 ft (13.4 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64 (2020)
Projected traffic92 by 2042
Trucks34%
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 byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jackson Road over Rock Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Jackson Road over Rock Creek 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 September 2024.

How much traffic does Jackson Road over Rock Creek carry?

About 64 vehicles per day (2020 count), of which roughly 34% are trucks.

How long is Jackson Road over Rock Creek?

The structure is 92 ft (28 m) long with a longest span of 44 ft (13.4 m) and a deck 29 ft wide.

Who owns Jackson Road over Rock Creek?

It is owned by the County Highway Agency and maintained by the City or Municipal Highway Agency.