US Bridges

Fifth ST (old 99W) over Cortina Creek

Fair

Colusa County, California · 1.2 MI S of Meyers RD · Structure no. 15C0037

Built
1967
58 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
114 ft
4 main spans
Daily traffic
3,832
2014 count
Owner
County
County Highway Agency

About this bridge

Fifth ST (old 99W) over Cortina Creek is a concrete continuous slab carrying Fifth ST (old 99W) over Cortina Creek in Colusa County, California. It was built in 1967, so it is 58 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 3,832 vehicles a day, roughly 10% of them trucks, projected to reach 5,810 by 2042. The structure is 114 ft (34.7 m) long and 42 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesFifth ST (old 99W)
CrossesCortina Creek
Location1.2 MI S of Meyers RD
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates39.08653, -122.10225
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
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 rating40.3 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length114 ft (34.7 m)
Longest span28 ft (8.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,832 (2014)
Projected traffic5,810 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Fifth ST (old 99W) over Cortina Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is Fifth ST (old 99W) over Cortina Creek 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 October 2023.

How much traffic does Fifth ST (old 99W) over Cortina Creek carry?

About 3,832 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Fifth ST (old 99W) over Cortina Creek?

The structure is 114 ft (34.7 m) long with a longest span of 28 ft (8.5 m) and a deck 42 ft wide.

Who owns Fifth ST (old 99W) over Cortina Creek?

It is owned by the County Highway Agency.