Bridge Type
Main Span(s): Steel [3] Truss - Thru [10]
Approach Span(s): Other [00]
Deck: Corrugated Steel [6] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 43.6 m = 143.1 ft
Main Spans: 1 at 42.7 m = 140.1 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 4.7 m = 15.4 ft (1 Lanes) and Out-To-Out: 4.9 m = 16.1 ft for a 6.1 m = 20.0 ft approaching roadway.
Vertical Clearance: 4.52 m = 14.8 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Musselshell County [065], Montana [30]
Owned by County Highway Agency [02], DOT District: 5
3M SW MELSTONE
Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Poor [4]
Loading
Design:
Operating: 20.9 metric ton = 23.0 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 16.3 metric ton = 17.9 tons (Load and Resistance Factor(LRFR) [3])
Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: June 2020 [0620] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 1.6 km = 1.0 mi
Traffic
ADT: 100 (2003) and Trucks: 0%
Future ADT: 100 (In 2026
)