US Bridges

Irrcounty Road 221 over Smoke Creek 025

FairPosted for load

Roosevelt County, Montana · 22M N Brockton · Structure no. L43221000+05001

Built
2004
21 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Irrcounty Road 221 over Smoke Creek 025 is a steel stringer/multi-beam or girder carrying Irrcounty Road 221 over Smoke Creek 025 in Roosevelt County, Montana. It was built in 2004, so it is 21 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 77 ft (23.5 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIrrcounty Road 221
CrossesSmoke Creek 025
Location22M N Brockton
RouteCounty Highway 43214
CountyRoosevelt County
StateMontana
Coordinates48.45456, -104.94232
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating19.6 US tons
Inventory rating15 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length77 ft (23.5 m)
Longest span68 ft (20.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 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 closed6.2 mi (10 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 Irrcounty Road 221 over Smoke Creek 025 built?

It was built in 2004, making it 21 years old in 2025.

What condition is Irrcounty Road 221 over Smoke Creek 025 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 2023.

How much traffic does Irrcounty Road 221 over Smoke Creek 025 carry?

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

How long is Irrcounty Road 221 over Smoke Creek 025?

The structure is 77 ft (23.5 m) long with a longest span of 68 ft (20.7 m) and a deck 24 ft wide.

Who owns Irrcounty Road 221 over Smoke Creek 025?

It is owned by the County Highway Agency.