US Bridges

Boulder Creek Road over Curlew Creek

Good

Ferry County, Washington · 0.03 Miles East of SR 21 · Structure no. 086463000000000

Built
2000
25 years old
Condition
Good
inspected June 2024
Type
Culvert
Steel
Length
25 ft
1 main span
Daily traffic
1,390
2018 count
Owner
County
County Highway Agency

About this bridge

Boulder Creek Road over Curlew Creek is a steel culvert carrying Boulder Creek Road over Curlew Creek in Ferry County, Washington. It was built in 2000, so it is 25 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,390 vehicles a day, roughly 13% of them trucks, projected to reach 1,970 by 2040. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBoulder Creek Road
CrossesCurlew Creek
Location0.03 Miles East of SR 21
RouteCounty Highway 6020
CountyFerry County
StateWashington
Coordinates48.87992, -118.60357
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating106.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,390 (2018)
Projected traffic1,970 by 2040
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$309,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Boulder Creek Road over Curlew Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Boulder Creek Road over Curlew 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 June 2024.

How much traffic does Boulder Creek Road over Curlew Creek carry?

About 1,390 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is Boulder Creek Road over Curlew Creek?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m).

Who owns Boulder Creek Road over Curlew Creek?

It is owned by the County Highway Agency.