US Bridges

State Route 45 over High Ditch

Fair

Colusa County, California · 03-COL-045-4.05 · Structure no. 15 0023

Built
1980
45 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
69 ft
3 main spans
Daily traffic
1,000
2013 count
Owner
State
State Highway Agency

About this bridge

State Route 45 over High Ditch is a concrete continuous slab carrying State Route 45 over High Ditch in Colusa County, California. It was built in 1980, so it is 45 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 6 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, projected to reach 809 by 2043. The structure is 69 ft (21 m) long and 35 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesState Route 45
CrossesHigh Ditch
Location03-COL-045-4.05
RouteState Highway 45
CountyColusa County
StateCalifornia
Coordinates38.96878, -121.86178
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length69 ft (21 m)
Longest span26 ft (7.9 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2013)
Projected traffic809 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 45 over High Ditch built?

It was built in 1980, making it 45 years old in 2025.

What condition is State Route 45 over High 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 January 2025.

How much traffic does State Route 45 over High Ditch carry?

About 1,000 vehicles per day (2013 count).

How long is State Route 45 over High Ditch?

The structure is 69 ft (21 m) long with a longest span of 26 ft (7.9 m) and a deck 35 ft wide.

Who owns State Route 45 over High Ditch?

It is owned by the State Highway Agency.