US Bridges

Harrison ST over Lowen Ditch

Fair

Riverside County, California · 0.2 MI S/ 81 ST Avenue · Structure no. 56C0586

Built
1979
46 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

Harrison ST over Lowen Ditch is a concrete continuous slab carrying Harrison ST over Lowen Ditch in Riverside County, California. It was built in 1979, so it is 46 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 116 by 2042. The structure is 78 ft (23.8 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesHarrison ST
CrossesLowen Ditch
Location0.2 MI S/ 81 ST Avenue
RouteCounty Highway 0
CountyRiverside County
StateCalifornia
Coordinates33.45993, -116.09422
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
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 inspectionNovember 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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.4 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic116 by 2042
Trucks1%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Harrison ST over Lowen Ditch built?

It was built in 1979, making it 46 years old in 2025.

What condition is Harrison ST over Lowen 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 November 2023.

How much traffic does Harrison ST over Lowen Ditch carry?

About 100 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Harrison ST over Lowen Ditch?

The structure is 78 ft (23.8 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns Harrison ST over Lowen Ditch?

It is owned by the County Highway Agency.