US Bridges

Good Creek RD over Stillwater River 176

Fair

Flathead County, Montana · 1M S Olney · Structure no. L15873000+03401

Built
1981
44 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
185
2023 count
Owner
County
County Highway Agency

About this bridge

Good Creek RD over Stillwater River 176 is a prestressed concrete stringer/multi-beam or girder carrying Good Creek RD over Stillwater River 176 in Flathead County, Montana. It was built in 1981, so it is 44 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 5 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 185 vehicles a day, roughly 3% of them trucks, projected to reach 198 by 2043. The structure is 97 ft (29.6 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesGood Creek RD
CrossesStillwater River 176
Location1M S Olney
RouteCounty Highway 15873
CountyFlathead County
StateMontana
Coordinates48.53597, -114.57175
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length97 ft (29.6 m)
Longest span92 ft (28 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic185 (2023)
Projected traffic198 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Good Creek RD over Stillwater River 176 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Good Creek RD over Stillwater River 176 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 October 2023.

How much traffic does Good Creek RD over Stillwater River 176 carry?

About 185 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Good Creek RD over Stillwater River 176?

The structure is 97 ft (29.6 m) long with a longest span of 92 ft (28 m) and a deck 33 ft wide.

Who owns Good Creek RD over Stillwater River 176?

It is owned by the County Highway Agency.