US Bridges

Rocky Creek Road over South Fork Deep Creek

Poor

Stevens County, Washington · .11 E. of Aladdin Rd. · Structure no. 080719000000000

Built
1955
70 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

Rocky Creek Road over South Fork Deep Creek is a wood or timber stringer/multi-beam or girder carrying Rocky Creek Road over South Fork Deep Creek in Stevens County, Washington. It was built in 1955, so it is 70 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 40 vehicles a day, roughly 15% of them trucks, projected to reach 120 by 2037. The structure is 29 ft (8.8 m) long and 15 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesRocky Creek Road
CrossesSouth Fork Deep Creek
Location.11 E. of Aladdin Rd.
RouteCounty Highway 46990
Coordinates48.72809, -117.67174
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating47 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic120 by 2037
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$963,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rocky Creek Road over South Fork Deep Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Rocky Creek Road over South Fork Deep 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 September 2024.

How much traffic does Rocky Creek Road over South Fork Deep Creek carry?

About 40 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Rocky Creek Road over South Fork Deep Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 15 ft wide.

Who owns Rocky Creek Road over South Fork Deep Creek?

It is owned by the County Highway Agency.