US Bridges

N Sandin Ranch LN over Middle Fork Rock CR 032

Good

Granite County, Montana · 15M SW Phillipsburg · Structure no. L20146000+01001

Built
2004
21 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
278
2023 count
Owner
County
County Highway Agency

About this bridge

N Sandin Ranch LN over Middle Fork Rock CR 032 is a prestressed concrete tee beam carrying N Sandin Ranch LN over Middle Fork Rock CR 032 in Granite County, Montana. It was built in 2004, so it is 21 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 278 vehicles a day, roughly 1% of them trucks, projected to reach 292 by 2043. The structure is 85 ft (26 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesN Sandin Ranch LN
CrossesMiddle Fork Rock CR 032
Location15M SW Phillipsburg
RouteCounty Highway 20115
StateMontana
Coordinates46.20701, -113.50584
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating32.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length85 ft (26 m)
Longest span85 ft (26 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic278 (2023)
Projected traffic292 by 2043
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 N Sandin Ranch LN over Middle Fork Rock CR 032 built?

It was built in 2004, making it 21 years old in 2025.

What condition is N Sandin Ranch LN over Middle Fork Rock CR 032 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 July 2024.

How much traffic does N Sandin Ranch LN over Middle Fork Rock CR 032 carry?

About 278 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N Sandin Ranch LN over Middle Fork Rock CR 032?

The structure is 85 ft (26 m) long with a longest span of 85 ft (26 m) and a deck 18 ft wide.

Who owns N Sandin Ranch LN over Middle Fork Rock CR 032?

It is owned by the County Highway Agency.