US Bridges

US Highway 101 over Upp Creek

Good

Mendocino County, California · 01-MEN-101U-48.14 · Structure no. 10 0305

Built
2017
8 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
8,000
2017 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 over Upp Creek is a prestressed concrete stringer/multi-beam or girder carrying US Highway 101 over Upp Creek in Mendocino County, California. It was built in 2017, so it is 8 years old, younger 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 8,000 vehicles a day, projected to reach 12,283 by 2041. The structure is 75 ft (23 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Highway 101
CrossesUpp Creek
Location01-MEN-101U-48.14
RouteU.S. Route 101
Coordinates39.42759, -123.35743
Functional classUrban Other Principal Arterial

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 protection9 ExcellentNo problems noted.
Last inspectionApril 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length75 ft (23 m)
Longest span74 ft (22.6 m)
Deck width47 ft (14.4 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2017)
Projected traffic12,283 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US Highway 101 over Upp Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is US Highway 101 over Upp 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 April 2023.

How much traffic does US Highway 101 over Upp Creek carry?

About 8,000 vehicles per day (2017 count).

How long is US Highway 101 over Upp Creek?

The structure is 75 ft (23 m) long with a longest span of 74 ft (22.6 m) and a deck 47 ft wide.

Who owns US Highway 101 over Upp Creek?

It is owned by the State Highway Agency.