US Bridges

Hammond RD over Whitetail Creek

Fair

Carter County, Montana · 21M NE Hammond · Structure no. S00277020+09001

Built
2010
15 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
32
2023 count
Owner
County
County Highway Agency

About this bridge

Hammond RD over Whitetail Creek is a prestressed concrete tee beam carrying Hammond RD over Whitetail Creek in Carter County, Montana. It was built in 2010, so it is 15 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 32 vehicles a day, roughly 9% of them trucks, projected to reach 34 by 2043. The structure is 102 ft (31 m) long and 31 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesHammond RD
CrossesWhitetail Creek
Location21M NE Hammond
RouteCounty Highway 277
CountyCarter County
StateMontana
Coordinates45.40214, -104.62206
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating37.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length102 ft (31 m)
Longest span99 ft (30.2 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2023)
Projected traffic34 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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$50,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hammond RD over Whitetail Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Hammond RD over Whitetail 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 August 2023.

How much traffic does Hammond RD over Whitetail Creek carry?

About 32 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Hammond RD over Whitetail Creek?

The structure is 102 ft (31 m) long with a longest span of 99 ft (30.2 m) and a deck 31 ft wide.

Who owns Hammond RD over Whitetail Creek?

It is owned by the County Highway Agency.