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Nearby Bridges in NBI 2021: 1


OLD STAGE ROAD over YELLOWSTONE RIVER 077 (Route: 34563)
Num:S00563000+09061x
Open: no restriction [A]
Built: 1980, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.2 Kilometers)

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:
Bridge Dimensions
Length: 143.8 m = 471.8 ft
Main Spans: 4 at 37 m = 121.4 ft
Approach Spans: 0
Skew: 28
Width, Roadway: 9.5 m = 31.2 ft (2 Lanes) and Out-To-Out: 10.5 m = 34.5 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]: Park County [067], Montana [30]
Owned by County Highway Agency [02], DOT District: 2
1M N SPRINGDALE
Condition
Deck: Satisfactory [6]
Superstructure: Good [7]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 74.3 metric ton = 81.7 tons (Unknown [A])
Inventory: 32.7 metric ton = 36.0 tons (Unknown [A])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: September 2020 [0920] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 4.8 km = 3.0 mi
Traffic
ADT: 193 (2019) and Trucks: 2%
Future ADT: 223 (In 2039 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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