US Bridges

S 596 over Big California Creek

Good

Deer Lodge County, Montana · 15M S Anaconda · Structure no. 000000201902675

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
293
2023 count
Owner
County
County Highway Agency

About this bridge

S 596 over Big California Creek is a prestressed concrete stringer/multi-beam or girder carrying S 596 over Big California Creek in Deer Lodge County, Montana. It was built in 2019, so it is 6 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 293 vehicles a day, roughly 74% of them trucks, projected to reach 316 by 2043. The structure is 83 ft (25.3 m) long and 31 ft wide. If it were closed, the detour would be 72.7 mi (117 km).

Location

Open in Google Maps
CarriesS 596
CrossesBig California Creek
Location15M S Anaconda
RouteCounty Highway 569
CountyDeer Lodge County
StateMontana
Coordinates45.98025, -113.01637
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic293 (2023)
Projected traffic316 by 2043
Trucks74%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed72.7 mi (117 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 S 596 over Big California Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is S 596 over Big California 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 2023.

How much traffic does S 596 over Big California Creek carry?

About 293 vehicles per day (2023 count), of which roughly 74% are trucks.

How long is S 596 over Big California Creek?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns S 596 over Big California Creek?

It is owned by the County Highway Agency.