US Bridges

Montgomery Ave over Central Irrigation Canal

Fair

Glenn County, California · Just E of Cutler Ave · Structure no. 11C0153

Built
1930
95 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
74 ft
2 main spans
Daily traffic
398
2011 count
Owner
County
County Highway Agency

About this bridge

Montgomery Ave over Central Irrigation Canal is a concrete continuous tee beam carrying Montgomery Ave over Central Irrigation Canal in Glenn County, California. It was built in 1930, so it is 95 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 398 vehicles a day, roughly 10% of them trucks, projected to reach 548 by 2042. The structure is 74 ft (22.6 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMontgomery Ave
CrossesCentral Irrigation Canal
LocationJust E of Cutler Ave
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.78407, -122.04636
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length74 ft (22.6 m)
Longest span34 ft (10.4 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic398 (2011)
Projected traffic548 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Montgomery Ave over Central Irrigation Canal built?

It was built in 1930, making it 95 years old in 2025.

What condition is Montgomery Ave over Central Irrigation 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 February 2024.

How much traffic does Montgomery Ave over Central Irrigation Canal carry?

About 398 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Montgomery Ave over Central Irrigation Canal?

The structure is 74 ft (22.6 m) long with a longest span of 34 ft (10.4 m) and a deck 22 ft wide.

Who owns Montgomery Ave over Central Irrigation Canal?

It is owned by the County Highway Agency.