US Bridges

Osborn RD over Mill Creek

FairPosted for load

Tehama County, California · 3.40 MI N Paskenta RD · Structure no. 08C0087

Built
1960
65 years old, rebuilt 1996
Condition
Fair
inspected September 2024
Type
Truss - Thru
Steel
Length
80 ft
2 main spans
Daily traffic
20
2007 count
Owner
County
County Highway Agency

About this bridge

Osborn RD over Mill Creek is a steel truss - thru carrying Osborn RD over Mill Creek in Tehama County, California. It was built in 1960 and reconstructed in 1996, so it is 65 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. Its operating status is: posted for other load-capacity restriction.

It carries about 20 vehicles a day, projected to reach 33 by 2041. The structure is 80 ft (24.4 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesOsborn RD
CrossesMill Creek
Location3.40 MI N Paskenta RD
RouteCounty Highway 0
CountyTehama County
StateCalifornia
Coordinates39.95379, -122.48024
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating52.1 US tons
Inventory rating27.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length80 ft (24.4 m)
Longest span48 ft (14.6 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2007)
Projected traffic33 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Osborn RD over Mill Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1996.

What condition is Osborn RD over Mill 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 September 2024.

How much traffic does Osborn RD over Mill Creek carry?

About 20 vehicles per day (2007 count).

How long is Osborn RD over Mill Creek?

The structure is 80 ft (24.4 m) long with a longest span of 48 ft (14.6 m) and a deck 18 ft wide.

Who owns Osborn RD over Mill Creek?

It is owned by the County Highway Agency.