US Bridges

Lower Harb RD over Beaver Creek 092

PoorPosted for load

Phillips County, Montana · 14M E Malta · Structure no. L36225001+01001

Built
1968
57 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
114 ft
3 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Lower Harb RD over Beaver Creek 092 is a steel continuous stringer/multi-beam or girder carrying Lower Harb RD over Beaver Creek 092 in Phillips County, Montana. It was built in 1968, so it is 57 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 114 ft (34.7 m) long and 20 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesLower Harb RD
CrossesBeaver Creek 092
Location14M E Malta
RouteCounty Highway 36212
StateMontana
Coordinates48.35711, -107.58236
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating21.1 US tons
Inventory rating16 US tons

Structure

MaterialSteel Continuous
DeckCorrugated steel
Main spans3 (+2 approach)
Design loadUnknown
Structure length114 ft (34.7 m)
Longest span67 ft (20.4 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 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 closed21.7 mi (35 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$345,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Lower Harb RD over Beaver Creek 092 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Lower Harb RD over Beaver Creek 092 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 April 2024.

How much traffic does Lower Harb RD over Beaver Creek 092 carry?

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

How long is Lower Harb RD over Beaver Creek 092?

The structure is 114 ft (34.7 m) long with a longest span of 67 ft (20.4 m) and a deck 20 ft wide.

Who owns Lower Harb RD over Beaver Creek 092?

It is owned by the County Highway Agency.