US Bridges

Sanders Road over South Fork Rock Creek

Good

Spokane County, Washington · 4 MI E of Fairfield · Structure no. 086048000000000

Built
1993
32 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
19
2019 count
Owner
County
County Highway Agency

About this bridge

Sanders Road over South Fork Rock Creek is a prestressed concrete tee beam carrying Sanders Road over South Fork Rock Creek in Spokane County, Washington. It was built in 1993, so it is 32 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 19 vehicles a day, roughly 21% of them trucks, projected to reach 27 by 2040. The structure is 67 ft (20.4 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSanders Road
CrossesSouth Fork Rock Creek
Location4 MI E of Fairfield
RouteCounty Highway 4413
Coordinates47.36161, -117.09653
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span63 ft (19.2 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19 (2019)
Projected traffic27 by 2040
Trucks21%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Sanders Road over South Fork Rock Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Sanders Road over South Fork 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 July 2023.

How much traffic does Sanders Road over South Fork Rock Creek carry?

About 19 vehicles per day (2019 count), of which roughly 21% are trucks.

How long is Sanders Road over South Fork Rock Creek?

The structure is 67 ft (20.4 m) long with a longest span of 63 ft (19.2 m) and a deck 16 ft wide.

Who owns Sanders Road over South Fork Rock Creek?

It is owned by the County Highway Agency.