US Bridges

Sawmill Creek Road over Sawmill Creek

Good

Lewis and Clark County, Montana · Lincoln Ranger District · Structure no. 011202000013095

Built
2013
12 years old
Condition
Good
inspected August 2024
Type
Slab
Wood or Timber
Length
29 ft
1 main span
Daily traffic
40
Owner
Federal
U.S. Forest Service

About this bridge

Sawmill Creek Road over Sawmill Creek is a wood or timber slab carrying Sawmill Creek Road over Sawmill Creek in Lewis and Clark County, Montana. It was built in 2013, so it is 12 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 60 by 2045. The structure is 29 ft (8.8 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesSawmill Creek Road
CrossesSawmill Creek
LocationLincoln Ranger District
RouteFederal Lands Road 571
StateMontana
Coordinates46.66172, -112.39073
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (—)
Projected traffic60 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 Sawmill Creek Road over Sawmill Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is Sawmill Creek Road over Sawmill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Sawmill Creek Road over Sawmill Creek carry?

About 40 vehicles per day (latest count).

How long is Sawmill Creek Road over Sawmill Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.

Who owns Sawmill Creek Road over Sawmill Creek?

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