US Bridges

Road over Mill Creek

Fair

Chelan County, Washington · No Data Entered · Structure no. 061706000001436

Built
1984
41 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
25
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Mill Creek is a prestressed concrete tee beam carrying Road over Mill Creek in Chelan County, Washington. It was built in 1984, so it is 41 years old, younger 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 5 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 25 vehicles a day, projected to reach 37 by 2045. The structure is 57 ft (17.3 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesRoad
CrossesMill Creek
LocationNo Data Entered
RouteFederal Lands Road 69600
CountyChelan County
StateWashington
Coordinates47.72806, -121.07028
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length57 ft (17.3 m)
Longest span55 ft (16.8 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (1995)
Projected traffic37 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byOther Federal 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 Road over Mill Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Road over 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 July 2023.

How much traffic does Road over Mill Creek carry?

About 25 vehicles per day (1995 count).

How long is Road over Mill Creek?

The structure is 57 ft (17.3 m) long with a longest span of 55 ft (16.8 m) and a deck 16 ft wide.

Who owns Road over Mill Creek?

It is owned by the U.S. Forest Service and maintained by the Other Federal Agency.