US Bridges

Old Monitor Road over Wenatchee River

FairPosted for load

Chelan County, Washington · 00.2S JCT S9 97 · Structure no. 081197000000000

Built
1907
118 years old, rebuilt 2010
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
312 ft
2 main spans
Daily traffic
363
2020 count
Owner
County
County Highway Agency

About this bridge

Old Monitor Road over Wenatchee River is a steel truss - thru carrying Old Monitor Road over Wenatchee River in Chelan County, Washington. It was built in 1907 and reconstructed in 2010, so it is 118 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 363 vehicles a day, roughly 4% of them trucks, projected to reach 454 by 2040. The structure is 312 ft (95.1 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesOld Monitor Road
CrossesWenatchee River
Location00.2S JCT S9 97
RouteCounty Highway 94200
CountyChelan County
StateWashington
Coordinates47.50167, -120.425
Functional classRural Minor Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating10 US tons
Inventory rating7.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans2 (+2 approach)
Design loadH 15
Structure length312 ft (95.1 m)
Longest span140 ft (42.7 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deck13 ft (4.1 m)

Traffic and service

Average daily traffic363 (2020)
Projected traffic454 by 2040
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Monitor Road over Wenatchee River built?

It was built in 1907, making it 118 years old in 2025. It was reconstructed in 2010.

What condition is Old Monitor Road over Wenatchee 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 May 2023.

How much traffic does Old Monitor Road over Wenatchee River carry?

About 363 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Old Monitor Road over Wenatchee River?

The structure is 312 ft (95.1 m) long with a longest span of 140 ft (42.7 m) and a deck 16 ft wide.

Who owns Old Monitor Road over Wenatchee River?

It is owned by the County Highway Agency.