US Bridges

US Highway 101 SB over Doolin Creek

Good

Mendocino County, California · 01-MEN-101-R23.59 · Structure no. 10 0190L

Built
1964
61 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
10,450
2009 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 SB over Doolin Creek is a concrete slab carrying US Highway 101 SB over Doolin Creek in Mendocino County, California. It was built in 1964, so it is 61 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.

It carries about 10,450 vehicles a day, roughly 11% of them trucks, projected to reach 13,415 by 2042. The structure is 27 ft (8.1 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Highway 101 SB
CrossesDoolin Creek
Location01-MEN-101-R23.59
RouteU.S. Route 101
Coordinates39.13795, -123.19595
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length27 ft (8.1 m)
Longest span27 ft (8.1 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,450 (2009)
Projected traffic13,415 by 2042
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US Highway 101 SB over Doolin Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is US Highway 101 SB over Doolin 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 October 2024.

How much traffic does US Highway 101 SB over Doolin Creek carry?

About 10,450 vehicles per day (2009 count), of which roughly 11% are trucks.

How long is US Highway 101 SB over Doolin Creek?

The structure is 27 ft (8.1 m) long with a longest span of 27 ft (8.1 m) and a deck 40 ft wide.

Who owns US Highway 101 SB over Doolin Creek?

It is owned by the State Highway Agency.