US Bridges

Branscomb Road over Redwood Creek

Fair

Mendocino County, California · 0.8 MI W Intx CR 320 · Structure no. 10C0083

Built
1981
44 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
104
2011 count
Owner
County
County Highway Agency

About this bridge

Branscomb Road over Redwood Creek is a prestressed concrete stringer/multi-beam or girder carrying Branscomb Road over Redwood Creek in Mendocino County, California. It was built in 1981, so it is 44 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 104 vehicles a day, roughly 5% of them trucks, projected to reach 273 by 2042. The structure is 83 ft (25.3 m) long and 35 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesBranscomb Road
CrossesRedwood Creek
Location0.8 MI W Intx CR 320
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates39.67098, -123.66799
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104 (2011)
Projected traffic273 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 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 Branscomb Road over Redwood Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Branscomb Road over Redwood 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 August 2024.

How much traffic does Branscomb Road over Redwood Creek carry?

About 104 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Branscomb Road over Redwood Creek?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 35 ft wide.

Who owns Branscomb Road over Redwood Creek?

It is owned by the County Highway Agency.