US Bridges

US Highway 101 over Upp Creek

Good

Mendocino County, California · 01-MEN-101-48.29 · Structure no. 10 0174

Built
2016
9 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
16,000
2017 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 over Upp Creek is a prestressed concrete box beam or girders - multiple carrying US Highway 101 over Upp Creek in Mendocino County, California. It was built in 2016, so it is 9 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 16,000 vehicles a day, projected to reach 22,518 by 2041. The structure is 102 ft (31.1 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS Highway 101
CrossesUpp Creek
Location01-MEN-101-48.29
RouteU.S. Route 101
Coordinates39.42942, -123.35608
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 protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating62.2 US tons
Inventory rating37.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length102 ft (31.1 m)
Longest span99 ft (30.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2017)
Projected traffic22,518 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 2016, making it 9 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 16,000 vehicles per day (2017 count).

How long is US Highway 101 over Upp Creek?

The structure is 102 ft (31.1 m) long with a longest span of 99 ft (30.1 m) and a deck 43 ft wide.

Who owns US Highway 101 over Upp Creek?

It is owned by the State Highway Agency.