US Bridges

Dodson Road over Canal Lateral

GoodPosted for load

Grant County, Washington · Dodson 1.3 N of 9 NW · Structure no. 081031000000000

Built
1981
44 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
1,567
2022 count
Owner
County
County Highway Agency

About this bridge

Dodson Road over Canal Lateral is a prestressed concrete tee beam carrying Dodson Road over Canal Lateral in Grant County, Washington. It was built in 1981, so it is 44 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. Its operating status is: posted for load restriction.

It carries about 1,567 vehicles a day, roughly 29% of them trucks, projected to reach 2,500 by 2042. The structure is 78 ft (23.8 m) long and 36 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesDodson Road
CrossesCanal Lateral
LocationDodson 1.3 N of 9 NW
RouteCounty Highway 91030
Coordinates47.24154, -119.55451
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span77 ft (23.5 m)
Deck width36 ft (11 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,567 (2022)
Projected traffic2,500 by 2042
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Dodson Road over Canal Lateral built?

It was built in 1981, making it 44 years old in 2025.

What condition is Dodson Road over Canal Lateral 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 December 2024.

How much traffic does Dodson Road over Canal Lateral carry?

About 1,567 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is Dodson Road over Canal Lateral?

The structure is 78 ft (23.8 m) long with a longest span of 77 ft (23.5 m) and a deck 36 ft wide.

Who owns Dodson Road over Canal Lateral?

It is owned by the County Highway Agency.