US Bridges

Grosscup Road over Cid Canal

Good

Benton County, Washington · 0.15 N Harrington · Structure no. 083407000000000

Built
1960
65 years old
Condition
Good
inspected February 2024
Type
Channel Beam
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
250
2018 count
Owner
County
County Highway Agency

About this bridge

Grosscup Road over Cid Canal is a prestressed concrete channel beam carrying Grosscup Road over Cid Canal in Benton County, Washington. It was built in 1960, so it is 65 years old, older 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 250 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2038. The structure is 34 ft (10.4 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesGrosscup Road
CrossesCid Canal
Location0.15 N Harrington
RouteCounty Highway 51700
CountyBenton County
StateWashington
Coordinates46.31515, -119.36727
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2018)
Projected traffic500 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$355,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Grosscup Road over Cid Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is Grosscup Road over Cid 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 Grosscup Road over Cid Canal carry?

About 250 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Grosscup Road over Cid Canal?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 28 ft wide.

Who owns Grosscup Road over Cid Canal?

It is owned by the County Highway Agency.