US Bridges

Minnehaha Road over Ten Mile Creek

Fair

Lewis and Clark County, Montana · Intersect Minnehaha&tenmi · Structure no. 011202000001001

Built
1955
70 years old, rebuilt 1995
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
23 ft
1 main span
Daily traffic
30
2004 count
Owner
Federal
U.S. Forest Service

About this bridge

Minnehaha Road over Ten Mile Creek is a wood or timber stringer/multi-beam or girder carrying Minnehaha Road over Ten Mile Creek in Lewis and Clark County, Montana. It was built in 1955 and reconstructed in 1995, so it is 70 years old, older 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 30 vehicles a day, projected to reach 45 by 2045. The structure is 23 ft (6.9 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesMinnehaha Road
CrossesTen Mile Creek
LocationIntersect Minnehaha&tenmi
RouteFederal Lands Road 527
CountyLewis and Clark County
StateMontana
Coordinates46.50614, -112.25993
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating25.7 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadOther
Structure length23 ft (6.9 m)
Longest span22 ft (6.6 m)
Deck width15 ft (4.7 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2004)
Projected traffic45 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Minnehaha Road over Ten Mile Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1995.

What condition is Minnehaha Road over Ten Mile 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 Minnehaha Road over Ten Mile Creek carry?

About 30 vehicles per day (2004 count).

How long is Minnehaha Road over Ten Mile Creek?

The structure is 23 ft (6.9 m) long with a longest span of 22 ft (6.6 m) and a deck 15 ft wide.

Who owns Minnehaha Road over Ten Mile Creek?

It is owned by the U.S. Forest Service.