US Bridges

Road 67 over Branch Howard Slough

Fair

Glenn County, California · 1.3 MI East of Road Z · Structure no. 11C0015

Built
1937
88 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
501 ft
20 main spans
Daily traffic
93
2010 count
Owner
County
County Highway Agency

About this bridge

Road 67 over Branch Howard Slough is a steel stringer/multi-beam or girder carrying Road 67 over Branch Howard Slough in Glenn County, California. It was built in 1937, so it is 88 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 93 vehicles a day, roughly 16% of them trucks, projected to reach 95 by 2044. The structure is 501 ft (152.7 m) long and 19 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesRoad 67
CrossesBranch Howard Slough
Location1.3 MI East of Road Z
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.42022, -121.90631
Functional classRural Minor Collector

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 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.5 US tons
Inventory rating19.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans20
Design loadUnknown
Structure length501 ft (152.7 m)
Longest span25 ft (7.6 m)
Deck width19 ft (5.8 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93 (2010)
Projected traffic95 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Road 67 over Branch Howard Slough built?

It was built in 1937, making it 88 years old in 2025.

What condition is Road 67 over Branch Howard 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 2024.

How much traffic does Road 67 over Branch Howard Slough carry?

About 93 vehicles per day (2010 count), of which roughly 16% are trucks.

How long is Road 67 over Branch Howard Slough?

The structure is 501 ft (152.7 m) long with a longest span of 25 ft (7.6 m) and a deck 19 ft wide.

Who owns Road 67 over Branch Howard Slough?

It is owned by the County Highway Agency.