US Bridges

Maxwell-Sites RD over Glenn-Colusa Canal

Fair

Colusa County, California · 0.8 MI W/O Mcdermott Road · Structure no. 15C0065

Built
1968
57 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
66 ft
2 main spans
Daily traffic
613
2015 count
Owner
County
County Highway Agency

About this bridge

Maxwell-Sites RD over Glenn-Colusa Canal is a concrete continuous slab carrying Maxwell-Sites RD over Glenn-Colusa Canal in Colusa County, California. It was built in 1968, so it is 57 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 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 613 vehicles a day, roughly 10% of them trucks, projected to reach 1,664 by 2046. The structure is 66 ft (20.1 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesMaxwell-Sites RD
CrossesGlenn-Colusa Canal
Location0.8 MI W/O Mcdermott Road
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates39.27612, -122.23643
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span32 ft (9.8 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic613 (2015)
Projected traffic1,664 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Maxwell-Sites RD over Glenn-Colusa Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Maxwell-Sites RD over Glenn-Colusa Canal 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 December 2024.

How much traffic does Maxwell-Sites RD over Glenn-Colusa Canal carry?

About 613 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Maxwell-Sites RD over Glenn-Colusa Canal?

The structure is 66 ft (20.1 m) long with a longest span of 32 ft (9.8 m) and a deck 32 ft wide.

Who owns Maxwell-Sites RD over Glenn-Colusa Canal?

It is owned by the County Highway Agency.