US Bridges

Gazelle-Callahan R over Noyes Valley Creek

Fair

Siskiyou County, California · 0.1 MI N Masterson RD · Structure no. 02C0253

Built
1972
53 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
287
2011 count
Owner
County
County Highway Agency

About this bridge

Gazelle-Callahan R over Noyes Valley Creek is a concrete continuous culvert carrying Gazelle-Callahan R over Noyes Valley Creek in Siskiyou County, California. It was built in 1972, so it is 53 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 6 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 287 vehicles a day, roughly 40% of them trucks, projected to reach 546 by 2041. The structure is 35 ft (10.6 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesGazelle-Callahan R
CrossesNoyes Valley Creek
Location0.1 MI N Masterson RD
RouteCounty Highway 0
Coordinates41.32131, -122.7496
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.3 US tons
Inventory rating50.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length35 ft (10.6 m)
Longest span17 ft (5.2 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic287 (2011)
Projected traffic546 by 2041
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Gazelle-Callahan R over Noyes Valley Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Gazelle-Callahan R over Noyes Valley 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 June 2023.

How much traffic does Gazelle-Callahan R over Noyes Valley Creek carry?

About 287 vehicles per day (2011 count), of which roughly 40% are trucks.

How long is Gazelle-Callahan R over Noyes Valley Creek?

The structure is 35 ft (10.6 m) long with a longest span of 17 ft (5.2 m) and a deck 30 ft wide.

Who owns Gazelle-Callahan R over Noyes Valley Creek?

It is owned by the County Highway Agency.