US Bridges

Seven Mile Road over Deep Creek

Fair

Spokane County, Washington · 0.5 NW Pine Bluff · Structure no. 082431000000000

Built
1958
67 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
171 ft
3 main spans
Daily traffic
2,901
2020 count
Owner
County
County Highway Agency

About this bridge

Seven Mile Road over Deep Creek is a concrete continuous tee beam carrying Seven Mile Road over Deep Creek in Spokane County, Washington. It was built in 1958, so it is 67 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 2,901 vehicles a day, roughly 19% of them trucks, projected to reach 4,177 by 2042. The structure is 171 ft (52 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSeven Mile Road
CrossesDeep Creek
Location0.5 NW Pine Bluff
RouteCounty Highway 4444
CountySpokane County
StateWashington
Coordinates47.74978, -117.54754
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.5 US tons
Inventory rating14.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52 m)
Longest span66 ft (20.1 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,901 (2020)
Projected traffic4,177 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$6.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Seven Mile Road over Deep Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Seven Mile Road over Deep 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 2023.

How much traffic does Seven Mile Road over Deep Creek carry?

About 2,901 vehicles per day (2020 count), of which roughly 19% are trucks.

How long is Seven Mile Road over Deep Creek?

The structure is 171 ft (52 m) long with a longest span of 66 ft (20.1 m) and a deck 31 ft wide.

Who owns Seven Mile Road over Deep Creek?

It is owned by the County Highway Agency.