US Bridges

Road 358 over Harvey Creek

Good

Granite County, Montana · Harvey Creek · Structure no. 011603000001033

Built
1984
41 years old
Condition
Good
inspected October 2022
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
40
Owner
Federal
U.S. Forest Service

About this bridge

Road 358 over Harvey Creek is a concrete slab carrying Road 358 over Harvey Creek in Granite County, Montana. It was built in 1984, so it is 41 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 22 ft (6.7 m) long and 16 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesRoad 358
CrossesHarvey Creek
LocationHarvey Creek
RouteFederal Lands Road 358
CountyGranite County
StateMontana
Coordinates46.60084, -113.48233
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 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 closed49.7 mi (80 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 Road 358 over Harvey Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Road 358 over Harvey 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 October 2022.

How much traffic does Road 358 over Harvey Creek carry?

About 40 vehicles per day (latest count).

How long is Road 358 over Harvey Creek?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 16 ft wide.

Who owns Road 358 over Harvey Creek?

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