US Bridges

1300 N over Henrys Fk.Snake R;fritz

Poor

Fremont County, Idaho · 1.1 S. 4.0 W. Ashton · Structure no. 000000000021075

Built
1967
58 years old
Condition
Poor
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
197 ft
3 main spans
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

1300 N over Henrys Fk.Snake R;fritz is a prestressed concrete tee beam carrying 1300 N over Henrys Fk.Snake R;fritz in Fremont County, Idaho. It was built in 1967, so it is 58 years old, older than the Idaho average of 45.3 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.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2039. The structure is 197 ft (60 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries1300 N
CrossesHenrys Fk.Snake R;fritz
Location1.1 S. 4.0 W. Ashton
RouteCounty Highway 0
StateIdaho
Coordinates44.05536, -111.53653
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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating24 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length197 ft (60 m)
Longest span64 ft (19.5 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 1300 N over Henrys Fk.Snake R;fritz built?

It was built in 1967, making it 58 years old in 2025.

What condition is 1300 N over Henrys Fk.Snake R;fritz 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 October 2024.

How much traffic does 1300 N over Henrys Fk.Snake R;fritz carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 1300 N over Henrys Fk.Snake R;fritz?

The structure is 197 ft (60 m) long with a longest span of 64 ft (19.5 m) and a deck 29 ft wide.

Who owns 1300 N over Henrys Fk.Snake R;fritz?

It is owned by the County Highway Agency.