US Bridges

Maintenance Road over Potholes Canal

FairPosted for load

Grant County, Washington · 4.8 Miles So. of RT262 · Structure no. 11PEC0002

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Truss - Thru
Steel
Length
70 ft
1 main span
Daily traffic
15
2024 count
Owner
Federal
Bureau of Reclamation

About this bridge

Maintenance Road over Potholes Canal is a steel truss - thru carrying Maintenance Road over Potholes Canal in Grant County, Washington. It was built in 1950, so it is 75 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 15 vehicles a day, projected to reach 15 by 2044. The structure is 70 ft (21.3 m) long and 12 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesMaintenance Road
CrossesPotholes Canal
Location4.8 Miles So. of RT262
CountyGrant County
StateWashington
Coordinates46.92233, -119.19584
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating14.3 US tons
Inventory rating8.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length70 ft (21.3 m)
Longest span70 ft (21.2 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic15 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Maintenance Road over Potholes Canal built?

It was built in 1950, making it 75 years old in 2025.

What condition is Maintenance Road over Potholes Canal 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 2024.

How much traffic does Maintenance Road over Potholes Canal carry?

About 15 vehicles per day (2024 count).

How long is Maintenance Road over Potholes Canal?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.2 m) and a deck 12 ft wide.

Who owns Maintenance Road over Potholes Canal?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.