US Bridges

Jack Creek RD over Jack Creek 028

PoorPosted for load

Madison County, Montana · 8M E Ennis · Structure no. L29122022+05001

Built
1952
73 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
27 ft
1 main span
Daily traffic
301
2023 count
Owner
County
County Highway Agency

About this bridge

Jack Creek RD over Jack Creek 028 is a wood or timber stringer/multi-beam or girder carrying Jack Creek RD over Jack Creek 028 in Madison County, Montana. It was built in 1952, so it is 73 years old, older than the Montana average of 47 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 301 vehicles a day, roughly 3% of them trucks, projected to reach 322 by 2043. The structure is 27 ft (8.2 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesJack Creek RD
CrossesJack Creek 028
Location8M E Ennis
RouteCounty Highway 29202
CountyMadison County
StateMontana
Coordinates45.35546, -111.57081
Functional classRural Minor Collector

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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic301 (2023)
Projected traffic322 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Jack Creek RD over Jack Creek 028 built?

It was built in 1952, making it 73 years old in 2025.

What condition is Jack Creek RD over Jack Creek 028 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 Jack Creek RD over Jack Creek 028 carry?

About 301 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Jack Creek RD over Jack Creek 028?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 16 ft wide.

Who owns Jack Creek RD over Jack Creek 028?

It is owned by the County Highway Agency.