US Bridges

Middle Creek RD over Middle Creek

Poor

Shasta County, California · 0.7 MI E of Iron Mtn RD · Structure no. 06C0297

Built
1925
100 years old
Condition
Poor
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
61
2012 count
Owner
County
County Highway Agency

About this bridge

Middle Creek RD over Middle Creek is a concrete continuous tee beam carrying Middle Creek RD over Middle Creek in Shasta County, California. It was built in 1925, so it is 100 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 61 vehicles a day, roughly 2% of them trucks, projected to reach 246 by 2044. The structure is 73 ft (22.3 m) long and 19 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesMiddle Creek RD
CrossesMiddle Creek
Location0.7 MI E of Iron Mtn RD
RouteCounty Highway 0
Coordinates40.59461, -122.45521
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length73 ft (22.3 m)
Longest span30 ft (9 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61 (2012)
Projected traffic246 by 2044
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$502,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Middle Creek RD over Middle Creek built?

It was built in 1925, making it 100 years old in 2025.

What condition is Middle Creek RD over Middle Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Middle Creek RD over Middle Creek carry?

About 61 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is Middle Creek RD over Middle Creek?

The structure is 73 ft (22.3 m) long with a longest span of 30 ft (9 m) and a deck 19 ft wide.

Who owns Middle Creek RD over Middle Creek?

It is owned by the County Highway Agency.