US Bridges

Travis Lane over Brockman Slough

Fair

Lassen County, California · .3 MI E/O Johnstonville R · Structure no. 07C0064

Built
1981
44 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
51 ft
3 main spans
Daily traffic
100
1979 count
Owner
County
County Highway Agency

About this bridge

Travis Lane over Brockman Slough is a wood or timber stringer/multi-beam or girder carrying Travis Lane over Brockman Slough in Lassen County, California. It was built in 1981, so it is 44 years old, younger 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 217 by 2041. The structure is 51 ft (15.5 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTravis Lane
CrossesBrockman Slough
Location.3 MI E/O Johnstonville R
RouteCounty Highway 0
CountyLassen County
StateCalifornia
Coordinates40.39106, -120.583
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.2 US tons
Inventory rating19.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckCorrugated steel
Main spans3
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span17 ft (5.2 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1979)
Projected traffic217 by 2041
Trucks5%
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 Travis Lane over Brockman Slough built?

It was built in 1981, making it 44 years old in 2025.

What condition is Travis Lane over Brockman Slough 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 August 2023.

How much traffic does Travis Lane over Brockman Slough carry?

About 100 vehicles per day (1979 count), of which roughly 5% are trucks.

How long is Travis Lane over Brockman Slough?

The structure is 51 ft (15.5 m) long with a longest span of 17 ft (5.2 m) and a deck 26 ft wide.

Who owns Travis Lane over Brockman Slough?

It is owned by the County Highway Agency.