US Bridges

Morgan Lake Road over Potholes Canal

Good

Grant County, Washington · 11.5 MI Nnw of Office · Structure no. 000013510-99999

Built
2002
23 years old
Condition
Good
inspected August 2022
Type
Tee Beam
Prestressed Concrete
Length
112 ft
1 main span
Daily traffic
150
2022 count
Owner
Federal
Bureau of Reclamation

About this bridge

Morgan Lake Road over Potholes Canal is a prestressed concrete tee beam carrying Morgan Lake Road over Potholes Canal in Grant County, Washington. It was built in 2002, so it is 23 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, roughly 1% of them trucks, projected to reach 170 by 2042. The structure is 112 ft (34.1 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesMorgan Lake Road
CrossesPotholes Canal
Location11.5 MI Nnw of Office
RouteFederal Lands Road 0
Coordinates46.9785, -119.258
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating39 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span106 ft (32.3 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic150 (2022)
Projected traffic170 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Fish and Wildlife
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 Morgan Lake Road over Potholes Canal built?

It was built in 2002, making it 23 years old in 2025.

What condition is Morgan Lake Road over Potholes Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2022.

How much traffic does Morgan Lake Road over Potholes Canal carry?

About 150 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Morgan Lake Road over Potholes Canal?

The structure is 112 ft (34.1 m) long with a longest span of 106 ft (32.3 m) and a deck 31 ft wide.

Who owns Morgan Lake Road over Potholes Canal?

It is owned by the Bureau of Reclamation and maintained by the Bureau of Fish and Wildlife.