US Bridges

Old 99W over Freshwater Creek

Good

Colusa County, California · 0.3 MI N Freshwater RD · Structure no. 15C0087

Built
1930
95 years old, rebuilt 1954
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete
Length
76 ft
3 main spans
Daily traffic
1,797
2014 count
Owner
County
County Highway Agency

About this bridge

Old 99W over Freshwater Creek is a concrete tee beam carrying Old 99W over Freshwater Creek in Colusa County, California. It was built in 1930 and reconstructed in 1954, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,797 vehicles a day, roughly 10% of them trucks, projected to reach 3,881 by 2046. The structure is 76 ft (23.2 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesOld 99W
CrossesFreshwater Creek
Location0.3 MI N Freshwater RD
RouteCounty Highway 0
Coordinates39.17706, -122.16207
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span25 ft (7.6 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,797 (2014)
Projected traffic3,881 by 2046
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 Old 99W over Freshwater Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1954.

What condition is Old 99W over Freshwater Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Old 99W over Freshwater Creek carry?

About 1,797 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Old 99W over Freshwater Creek?

The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 41 ft wide.

Who owns Old 99W over Freshwater Creek?

It is owned by the County Highway Agency.