US Bridges

Two Mile Road over Pamela Creek

Fair

Colusa County, California · 1.6 MI N of Lurline Ave · Structure no. 15C0097

Built
1935
90 years old, rebuilt 2006
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
21 ft
1 main span
Daily traffic
76
2014 count
Owner
County
County Highway Agency

About this bridge

Two Mile Road over Pamela Creek is a steel stringer/multi-beam or girder carrying Two Mile Road over Pamela Creek in Colusa County, California. It was built in 1935 and reconstructed in 2006, so it is 90 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 76 vehicles a day, roughly 10% of them trucks, projected to reach 137 by 2041. The structure is 21 ft (6.5 m) long and 20 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesTwo Mile Road
CrossesPamela Creek
Location1.6 MI N of Lurline Ave
RouteCounty Highway 0
Coordinates39.24166, -122.15339
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length21 ft (6.5 m)
Longest span20 ft (6.1 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76 (2014)
Projected traffic137 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Two Mile Road over Pamela Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2006.

What condition is Two Mile Road over Pamela 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 July 2023.

How much traffic does Two Mile Road over Pamela Creek carry?

About 76 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Two Mile Road over Pamela Creek?

The structure is 21 ft (6.5 m) long with a longest span of 20 ft (6.1 m) and a deck 20 ft wide.

Who owns Two Mile Road over Pamela Creek?

It is owned by the County Highway Agency.