US Bridges

Edgar RD over Thistle Canal

Poor

Imperial County, California · 0.55 MI W/O Forrester RD · Structure no. 58C0133

Built
1974
51 years old
Condition
Poor
inspected December 2024
Type
Slab
Concrete Continuous
Length
68 ft
2 main spans
Daily traffic
80
2020 count
Owner
County
County Highway Agency

About this bridge

Edgar RD over Thistle Canal is a concrete continuous slab carrying Edgar RD over Thistle Canal in Imperial County, California. It was built in 1974, so it is 51 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 80 vehicles a day, roughly 1% of them trucks, projected to reach 107 by 2042. The structure is 68 ft (20.7 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEdgar RD
CrossesThistle Canal
Location0.55 MI W/O Forrester RD
RouteCounty Highway 0
CountyImperial County
StateCalifornia
Coordinates32.88961, -115.63063
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span33 ft (10.1 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2020)
Projected traffic107 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$297,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Edgar RD over Thistle Canal built?

It was built in 1974, making it 51 years old in 2025.

What condition is Edgar RD over Thistle Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Edgar RD over Thistle Canal carry?

About 80 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Edgar RD over Thistle Canal?

The structure is 68 ft (20.7 m) long with a longest span of 33 ft (10.1 m) and a deck 29 ft wide.

Who owns Edgar RD over Thistle Canal?

It is owned by the County Highway Agency.