US Bridges

Starr Road over South Fork Rock Creek

Poor

Spokane County, Washington · 06.0E Fairfield · Structure no. 084831000000000

Built
1959
66 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
42 ft
2 main spans
Daily traffic
16
2020 count
Owner
County
County Highway Agency

About this bridge

Starr Road over South Fork Rock Creek is a wood or timber stringer/multi-beam or girder carrying Starr Road over South Fork Rock Creek in Spokane County, Washington. It was built in 1959, so it is 66 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 16 vehicles a day, roughly 25% of them trucks, projected to reach 23 by 2042. The structure is 42 ft (12.8 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesStarr Road
CrossesSouth Fork Rock Creek
Location06.0E Fairfield
RouteCounty Highway 4560
Coordinates47.34986, -117.06714
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be 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 rating65 US tons
Inventory rating48 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16 (2020)
Projected traffic23 by 2042
Trucks25%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$439,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Starr Road over South Fork Rock Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Starr Road over South Fork Rock Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

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

About 16 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Starr Road over South Fork Rock Creek?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns Starr Road over South Fork Rock Creek?

It is owned by the County Highway Agency.