US Bridges

Arnold RD over Reservation Main Drain

Fair

Imperial County, California · 0.6 MI W/O Picacho RD · Structure no. 58C0195

Built
1988
37 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
64 ft
2 main spans
Daily traffic
1,000
2021 count
Owner
County
County Highway Agency

About this bridge

Arnold RD over Reservation Main Drain is a concrete continuous slab carrying Arnold RD over Reservation Main Drain in Imperial County, California. It was built in 1988, so it is 37 years old, younger 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,124 by 2043. The structure is 64 ft (19.5 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesArnold RD
CrossesReservation Main Drain
Location0.6 MI W/O Picacho RD
RouteCounty Highway 0
Coordinates32.75273, -114.62752
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length64 ft (19.5 m)
Longest span31 ft (9.4 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2021)
Projected traffic1,124 by 2043
Trucks2%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Arnold RD over Reservation Main Drain built?

It was built in 1988, making it 37 years old in 2025.

What condition is Arnold RD over Reservation Main Drain 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 October 2023.

How much traffic does Arnold RD over Reservation Main Drain carry?

About 1,000 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Arnold RD over Reservation Main Drain?

The structure is 64 ft (19.5 m) long with a longest span of 31 ft (9.4 m) and a deck 34 ft wide.

Who owns Arnold RD over Reservation Main Drain?

It is owned by the County Highway Agency.