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Nearby Bridges in NBI 2021: 1


SUNSET HILL RD over BLACKFOOT RIVER 088 (Route: 32406)
Num:L32406002+06001x
Posted for load [P]
Built: 1907, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Steel [3] Truss - Thru [10]
Approach Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Deck: Wood or Timber [8] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 65.8 m = 215.9 ft
Main Spans: 1 at 45.7 m = 149.9 ft
Approach Spans: 4
Skew: 0
Width, Roadway: 4.1 m = 13.5 ft (1 Lanes) and Out-To-Out: 4.3 m = 14.1 ft for a 7.3 m = 24.0 ft approaching roadway.
Vertical Clearance: 6.18 m = 20.3 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Missoula County [063], Montana [30]
Owned by County Highway Agency [02], DOT District: 1
3M S CLEARWATER JCT
Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design:
Operating: 5.4 metric ton = 5.9 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 4.5 metric ton = 5.0 tons (Load and Resistance Factor(LRFR) [3])
Appraisal
Structural: Basically intolerable requiring high priority of replacement [2]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: June 1999 [699] 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: 2.1 km = 1.3 mi
Traffic
ADT: 238 (2003) and Trucks: 3%
Future ADT: 238 (In 2025 )

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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