US Bridges

Frontage Road 205 over Cottonwood Creek 072

Poor

Custer County, Montana · 14M SW Miles City · Structure no. L09205002+07001

Built
1929
96 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
154 ft
8 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Frontage Road 205 over Cottonwood Creek 072 is a wood or timber stringer/multi-beam or girder carrying Frontage Road 205 over Cottonwood Creek 072 in Custer County, Montana. It was built in 1929, so it is 96 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.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 154 ft (46.9 m) long and 20 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesFrontage Road 205
CrossesCottonwood Creek 072
Location14M SW Miles City
RouteState Highway 9205
StateMontana
Coordinates46.30991, -106.09175
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating45 US tons
Inventory rating31 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans8
Design loadH 15
Structure length154 ft (46.9 m)
Longest span19 ft (5.8 m)
Deck width20 ft (6.1 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 closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$194,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Frontage Road 205 over Cottonwood Creek 072 built?

It was built in 1929, making it 96 years old in 2025.

What condition is Frontage Road 205 over Cottonwood Creek 072 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 2024.

How much traffic does Frontage Road 205 over Cottonwood Creek 072 carry?

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

How long is Frontage Road 205 over Cottonwood Creek 072?

The structure is 154 ft (46.9 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.

Who owns Frontage Road 205 over Cottonwood Creek 072?

It is owned by the State Highway Agency.