US Bridges

Middle Frk Mill CR over South Fork Mill Creek

Fair

Stevens County, Washington · .12 NE South Fork Mill CR · Structure no. 081832000000000

Built
1974
51 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
28 ft
1 main span
Daily traffic
16
2024 count
Owner
County
County Highway Agency

About this bridge

Middle Frk Mill CR over South Fork Mill Creek is a wood or timber stringer/multi-beam or girder carrying Middle Frk Mill CR over South Fork Mill Creek in Stevens County, Washington. It was built in 1974, so it is 51 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 16 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2037. The structure is 28 ft (8.5 m) long and 17 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesMiddle Frk Mill CR
CrossesSouth Fork Mill Creek
Location.12 NE South Fork Mill CR
RouteCounty Highway 46680
Coordinates48.62171, -117.75376
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating30 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16 (2024)
Projected traffic75 by 2037
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Middle Frk Mill CR over South Fork Mill Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Middle Frk Mill CR over South Fork Mill 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 2024.

How much traffic does Middle Frk Mill CR over South Fork Mill Creek carry?

About 16 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Middle Frk Mill CR over South Fork Mill Creek?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 17 ft wide.

Who owns Middle Frk Mill CR over South Fork Mill Creek?

It is owned by the County Highway Agency.