US Bridges

STC1769;E Thatcher over Bear River;thatcher Br.

Fair

Franklin County, Idaho · 0.5 W. Thatcher · Structure no. 000000000019160

Built
1984
41 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
227 ft
3 main spans
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

STC1769;E Thatcher over Bear River;thatcher Br. is a prestressed concrete stringer/multi-beam or girder carrying STC1769;E Thatcher over Bear River;thatcher Br. in Franklin County, Idaho. It was built in 1984, so it is 41 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 110 vehicles a day, roughly 22% of them trucks, projected to reach 165 by 2042. The structure is 227 ft (69.2 m) long and 34 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesSTC1769;E Thatcher
CrossesBear River;thatcher Br.
Location0.5 W. Thatcher
RouteCounty Highway 1769
CountyFranklin County
StateIdaho
Coordinates42.40819, -111.73361
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length227 ft (69.2 m)
Longest span74 ft (22.6 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic165 by 2042
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was STC1769;E Thatcher over Bear River;thatcher Br. built?

It was built in 1984, making it 41 years old in 2025.

What condition is STC1769;E Thatcher over Bear River;thatcher Br. in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does STC1769;E Thatcher over Bear River;thatcher Br. carry?

About 110 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is STC1769;E Thatcher over Bear River;thatcher Br.?

The structure is 227 ft (69.2 m) long with a longest span of 74 ft (22.6 m) and a deck 34 ft wide.

Who owns STC1769;E Thatcher over Bear River;thatcher Br.?

It is owned by the County Highway Agency.