US Bridges

Middle Bridge Road over South Cow Creek

Fair

Shasta County, California · Latour State Forest · Structure no. 06F0031

Built
1986
39 years old, rebuilt 1994
Condition
Fair
inspected September 2024
Type
Arch - Deck
Aluminum, Wrought Iron, or Cast Iron
Length
21 ft
1 main span
Daily traffic
10
2011 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Middle Bridge Road over South Cow Creek is a aluminum, wrought iron, or cast iron arch - deck carrying Middle Bridge Road over South Cow Creek in Shasta County, California. It was built in 1986 and reconstructed in 1994, so it is 39 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 10 vehicles a day, roughly 30% of them trucks, projected to reach 36 by 2045. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMiddle Bridge Road
CrossesSouth Cow Creek
LocationLatour State Forest
RouteState Lands Road 0
Coordinates40.6236, -121.694
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
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2011)
Projected traffic36 by 2045
Trucks30%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Middle Bridge Road over South Cow Creek built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 1994.

What condition is Middle Bridge Road over South Cow 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 Middle Bridge Road over South Cow Creek carry?

About 10 vehicles per day (2011 count), of which roughly 30% are trucks.

How long is Middle Bridge Road over South Cow Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns Middle Bridge Road over South Cow Creek?

It is owned by the State Park, Forest, or Reservation Agency.