US Bridges

Hendricks Mill Roa over Grasshopper Creek

FairPosted for load

Beaverhead County, Montana · S Bannack · Structure no. 000000000007041

Built
1980
45 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Hendricks Mill Roa over Grasshopper Creek is a steel stringer/multi-beam or girder carrying Hendricks Mill Roa over Grasshopper Creek in Beaverhead County, Montana. It was built in 1980, so it is 45 years old, younger than the Montana average of 47 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 51 ft (15.5 m) long and 19 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesHendricks Mill Roa
CrossesGrasshopper Creek
LocationS Bannack
RouteCounty Highway 1318
CountyBeaverhead County
StateMontana
Coordinates45.16254, -113.00262
Functional classRural Minor 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating5 US tons
Inventory rating5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span39 ft (11.9 m)
Deck width19 ft (5.7 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hendricks Mill Roa over Grasshopper Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Hendricks Mill Roa over Grasshopper Creek 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 November 2024.

How much traffic does Hendricks Mill Roa over Grasshopper Creek carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Hendricks Mill Roa over Grasshopper Creek?

The structure is 51 ft (15.5 m) long with a longest span of 39 ft (11.9 m) and a deck 19 ft wide.

Who owns Hendricks Mill Roa over Grasshopper Creek?

It is owned by the County Highway Agency.