US Bridges

Moe Ridge Road over Mad River

Fair

Chelan County, Washington · 0.10S JCT Mad River RD · Structure no. 087509000000000

Built
2001
24 years old
Condition
Fair
inspected October 2024
Type
Girder and Floorbeam System
Steel
Length
60 ft
1 main span
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

Moe Ridge Road over Mad River is a steel girder and floorbeam system carrying Moe Ridge Road over Mad River in Chelan County, Washington. It was built in 2001, so it is 24 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 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 40 vehicles a day, roughly 3% of them trucks, projected to reach 82 by 2046. The structure is 60 ft (18.3 m) long and 14 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesMoe Ridge Road
CrossesMad River
Location0.10S JCT Mad River RD
RouteCounty Highway 48130
Coordinates47.72917, -120.37333
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating36.4 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span55 ft (16.8 m)
Deck width14 ft (4.3 m)
Roadway width8 ft (2.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic82 by 2046
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Moe Ridge Road over Mad River built?

It was built in 2001, making it 24 years old in 2025.

What condition is Moe Ridge Road over Mad River 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 October 2024.

How much traffic does Moe Ridge Road over Mad River carry?

About 40 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Moe Ridge Road over Mad River?

The structure is 60 ft (18.3 m) long with a longest span of 55 ft (16.8 m) and a deck 14 ft wide.

Who owns Moe Ridge Road over Mad River?

It is owned by the County Highway Agency.