Bridge Type
Main Span(s): Prestressed concrete [5] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Latex Concrete or similar additive [3]
Bridge Dimensions
Length: 74.3 m = 243.8 ft
Main Spans: 4 at 21.3 m = 69.9 ft
Approach Spans: 0
Skew: 30
Width, Roadway: 8.4 m = 27.6 ft (2 Lanes) and Out-To-Out: 9.4 m = 30.8 ft for a 9.8 m = 32.2 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Missoula County [063], Montana [30]
Owned by State Highway Agency [01], DOT District: 1
1M W BONNER
Condition
Deck: Satisfactory [6]
Superstructure: Good [7]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 42.6 metric ton = 46.9 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 21.8 metric ton = 24.0 tons (Load and Resistance Factor(LRFR) [3])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Basically intolerable requiring high priority of corrrective action [3]
Road Alignment: Better than present minimum criteria [7]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: June 2020 [0620] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0 km = 0.0 mi
Traffic
ADT: 6440 (2019) and Trucks: 3%
Future ADT: 6762 (In 2039
)