US Bridges

Keystone RD over Westside Main Canal

Fair

Imperial County, California · 0.3 MI W/O Forrester RD · Structure no. 58C0138

Built
1950
75 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
61 ft
4 main spans
Daily traffic
25
2021 count
Owner
County
County Highway Agency

About this bridge

Keystone RD over Westside Main Canal is a wood or timber stringer/multi-beam or girder carrying Keystone RD over Westside Main Canal in Imperial County, California. It was built in 1950, so it is 75 years old, older than the California average of 54.8 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.

It carries about 25 vehicles a day, projected to reach 45 by 2043. The structure is 61 ft (18.6 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesKeystone RD
CrossesWestside Main Canal
Location0.3 MI W/O Forrester RD
RouteCounty Highway 0
CountyImperial County
StateCalifornia
Coordinates32.91365, -115.62552
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating34.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length61 ft (18.6 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2021)
Projected traffic45 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway 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 Keystone RD over Westside Main Canal built?

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

What condition is Keystone RD over Westside Main 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 December 2023.

How much traffic does Keystone RD over Westside Main Canal carry?

About 25 vehicles per day (2021 count).

How long is Keystone RD over Westside Main Canal?

The structure is 61 ft (18.6 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns Keystone RD over Westside Main Canal?

It is owned by the County Highway Agency.