US Bridges

SR-165 over Blacksmith Fork River

Good

Cache County, Utah · North Edge of Nibley · Structure no. 005057F

Built
1991
34 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
14,329
2012 count
Owner
State
State Highway Agency

About this bridge

SR-165 over Blacksmith Fork River is a prestressed concrete stringer/multi-beam or girder carrying SR-165 over Blacksmith Fork River in Cache County, Utah. It was built in 1991, so it is 34 years old, younger than the Utah average of 40.1 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 14,329 vehicles a day, roughly 17% of them trucks, projected to reach 17,911 by 2032. The structure is 73 ft (22.2 m) long and 86 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR-165
CrossesBlacksmith Fork River
LocationNorth Edge of Nibley
RouteState Highway 165
StateUtah
Coordinates41.68694, -111.83389
Functional classUrban Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length73 ft (22.2 m)
Longest span70 ft (21.3 m)
Deck width86 ft (26.1 m)
Roadway width82 ft (25.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,329 (2012)
Projected traffic17,911 by 2032
Trucks17%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 SR-165 over Blacksmith Fork River built?

It was built in 1991, making it 34 years old in 2025.

What condition is SR-165 over Blacksmith Fork River 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 July 2023.

How much traffic does SR-165 over Blacksmith Fork River carry?

About 14,329 vehicles per day (2012 count), of which roughly 17% are trucks.

How long is SR-165 over Blacksmith Fork River?

The structure is 73 ft (22.2 m) long with a longest span of 70 ft (21.3 m) and a deck 86 ft wide.

Who owns SR-165 over Blacksmith Fork River?

It is owned by the State Highway Agency.