US Bridges

Road M1 over Rattlesnake Creek

Good

Tehama County, California · 26 Mi. N. of Eel Riv.W.C. · Structure no. 050856000001011

Built
1978
47 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
110 ft
2 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Road M1 over Rattlesnake Creek is a concrete box beam or girders - multiple carrying Road M1 over Rattlesnake Creek in Tehama County, California. It was built in 1978, so it is 47 years old, younger 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 110 ft (33.5 m) long and 18 ft wide.

Location

Open in Google Maps
CarriesRoad M1
CrossesRattlesnake Creek
Location26 Mi. N. of Eel Riv.W.C.
RouteFederal Lands Road 0M1
CountyTehama County
StateCalifornia
Coordinates39.74274, -123.0448
Functional classRural Local

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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.9 US tons
Inventory rating37.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckOther
Main spans2
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span55 ft (16.8 m)
Deck width18 ft (5.6 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Road M1 over Rattlesnake Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Road M1 over Rattlesnake 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 August 2023.

How much traffic does Road M1 over Rattlesnake Creek carry?

About 50 vehicles per day (latest count).

How long is Road M1 over Rattlesnake Creek?

The structure is 110 ft (33.5 m) long with a longest span of 55 ft (16.8 m) and a deck 18 ft wide.

Who owns Road M1 over Rattlesnake Creek?

It is owned by the U.S. Forest Service.