US Bridges

Harrison ST over Almar Ditch

Fair

Riverside County, California · 1.3 MI S/O Pierce ST · Structure no. 56C0584

Built
1950
75 years old, rebuilt 1989
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
97 ft
5 main spans
Daily traffic
1,000
2014 count
Owner
County
County Highway Agency

About this bridge

Harrison ST over Almar Ditch is a concrete continuous slab carrying Harrison ST over Almar Ditch in Riverside County, California. It was built in 1950 and reconstructed in 1989, 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 1,000 vehicles a day, roughly 1% of them trucks, projected to reach 1,200 by 2040. The structure is 97 ft (29.6 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesHarrison ST
CrossesAlmar Ditch
Location1.3 MI S/O Pierce ST
RouteCounty Highway 0
CountyRiverside County
StateCalifornia
Coordinates33.47388, -116.10741
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionMarch 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 geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum 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 spans5
Design loadHS 20
Structure length97 ft (29.6 m)
Longest span19 ft (5.8 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2014)
Projected traffic1,200 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Harrison ST over Almar Ditch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1989.

What condition is Harrison ST over Almar Ditch 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 March 2023.

How much traffic does Harrison ST over Almar Ditch carry?

About 1,000 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Harrison ST over Almar Ditch?

The structure is 97 ft (29.6 m) long with a longest span of 19 ft (5.8 m) and a deck 42 ft wide.

Who owns Harrison ST over Almar Ditch?

It is owned by the County Highway Agency.