US Bridges

SR 170 over East Low Canal

Good

Grant County, Washington · 2.4 E JCT SR 17 · Structure no. 0011702A0000000

Built
1980
45 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
134 ft
1 main span
Daily traffic
2,878
2023 count
Owner
State
State Highway Agency

About this bridge

SR 170 over East Low Canal is a prestressed concrete stringer/multi-beam or girder carrying SR 170 over East Low Canal in Grant County, Washington. It was built in 1980, so it is 45 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 2,878 vehicles a day, roughly 14% of them trucks, projected to reach 3,569 by 2039. The structure is 134 ft (40.8 m) long and 45 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSR 170
CrossesEast Low Canal
Location2.4 E JCT SR 17
RouteState Highway 170
CountyGrant County
StateWashington
Coordinates46.96989, -119.0679
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating86 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span129 ft (39.3 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,878 (2023)
Projected traffic3,569 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 170 over East Low Canal built?

It was built in 1980, making it 45 years old in 2025.

What condition is SR 170 over East Low 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 February 2024.

How much traffic does SR 170 over East Low Canal carry?

About 2,878 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 170 over East Low Canal?

The structure is 134 ft (40.8 m) long with a longest span of 129 ft (39.3 m) and a deck 45 ft wide.

Who owns SR 170 over East Low Canal?

It is owned by the State Highway Agency.