US Bridges

Fern RD over Glendenning Creek

GoodPosted for load

Shasta County, California · 0.3 MI N Whitmore RD · Structure no. 06C0178

Built
1930
95 years old, rebuilt 1970
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
73 ft
3 main spans
Daily traffic
321
2014 count
Owner
County
County Highway Agency

About this bridge

Fern RD over Glendenning Creek is a wood or timber stringer/multi-beam or girder carrying Fern RD over Glendenning Creek in Shasta County, California. It was built in 1930 and reconstructed in 1970, so it is 95 years old, older 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. Its operating status is: posted for load restriction.

It carries about 321 vehicles a day, roughly 10% of them trucks, projected to reach 765 by 2041. The structure is 73 ft (22.3 m) long and 16 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesFern RD
CrossesGlendenning Creek
Location0.3 MI N Whitmore RD
RouteCounty Highway 0
Coordinates40.63544, -121.88805
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating21.4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length73 ft (22.3 m)
Longest span25 ft (7.6 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic321 (2014)
Projected traffic765 by 2041
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 Fern RD over Glendenning Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1970.

What condition is Fern RD over Glendenning 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 April 2023.

How much traffic does Fern RD over Glendenning Creek carry?

About 321 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Fern RD over Glendenning Creek?

The structure is 73 ft (22.3 m) long with a longest span of 25 ft (7.6 m) and a deck 16 ft wide.

Who owns Fern RD over Glendenning Creek?

It is owned by the County Highway Agency.