US Bridges

Road 20157 over Lt Hd Fork Blacksmith

PoorPosted for load

Cache County, Utah · 17 M NE of Logan · Structure no. 041907000001019

Built
1954
71 years old, rebuilt 2000
Condition
Poor
inspected September 2023
Type
Other
Wood or Timber
Length
28 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Road 20157 over Lt Hd Fork Blacksmith is a wood or timber other carrying Road 20157 over Lt Hd Fork Blacksmith in Cache County, Utah. It was built in 1954 and reconstructed in 2000, so it is 71 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 28 ft (8.5 m) long and 14 ft wide.

CarriesRoad 20157
CrossesLt Hd Fork Blacksmith
Location17 M NE of Logan
RouteFederal Lands Road 20157
StateUtah
Coordinates41.6612, -111.66515
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating17.2 US tons
Inventory rating13.2 US tons

Structure

Structure typeOther
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span28 ft (8.4 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road 20157 over Lt Hd Fork Blacksmith built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2000.

What condition is Road 20157 over Lt Hd Fork Blacksmith in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Road 20157 over Lt Hd Fork Blacksmith carry?

About 50 vehicles per day (latest count).

How long is Road 20157 over Lt Hd Fork Blacksmith?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.4 m) and a deck 14 ft wide.

Who owns Road 20157 over Lt Hd Fork Blacksmith?

It is owned by the U.S. Forest Service.