TWIN BRIDGES RD over YELLOWSTONE RIVER 047 (Route: 48044)
Num:L48115000+08001x
Bridge closed to all traffic [K]
Built: 1931, 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): Concrete [1] Tee beam [04]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]

Bridge Dimensions
Length: 173.7 m = 569.9 ft
Main Spans: 3 at 48.8 m = 160.1 ft
Approach Spans: 2
Skew: 0
Width, Roadway: 6.1 m = 20.0 ft (2 Lanes) and Out-To-Out: 6.4 m = 21.0 ft for a 7.9 m = 25.9 ft approaching roadway.
Vertical Clearance: 4.62 m = 15.2 ft and Navigational Clearance: 0 = N/A

Location
Unknown [00000]: Stillwater County [095], Montana [30]
Owned by State Highway Agency [01], DOT District: 5
5M SE REED POINT

Condition
Deck: Fair [5]
Superstructure: Poor [4]
Substructure: Serious [3]
Loading
Design: M 13.5 / H 15 [2]
Operating: 12.7 metric ton = 14.0 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 10 metric ton = 11.0 tons (Load and Resistance Factor(LRFR) [3])

Appraisal
Structural:
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Bridge is scour critical; field review indicates that extensive scour has occurred at bridge foundations. [2]
Inspections
Date: July 1999 [799] 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: 19.9 km = 12.3 mi
Traffic
ADT: 100 (2004) and Trucks: 0%
Future ADT: 100 (In 2026 )

I 90 over YELLOWSTONE RIVER (Route: 90)
Num:I00090398+00812x
Open: no restriction [A]
Built: 1976, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.5 Miles (0.8 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]

Bridge Dimensions
Length: 176.1 m = 577.8 ft
Main Spans: 4 at 50.3 m = 165.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 12.6 m = 41.3 ft (2 Lanes) and Out-To-Out: 13.4 m = 44.0 ft for a 11.6 m = 38.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Unknown [00000]: Stillwater County [095], Montana [30]
Owned by State Highway Agency [01], DOT District: 5
5.6M E REED POINT

Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 34.5 metric ton = 38.0 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 26.3 metric ton = 28.9 tons (Load and Resistance Factor(LRFR) [3])

Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Better than present minimum criteria [7]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: August 1999 [899] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.1 km = 0.1 mi
Traffic
ADT: 4567 (2019) and Trucks: 24%
Future ADT: 9864 (In 2039 )

I 90 over YELLOWSTONE RIVER (Route: 90)
Num:I00090398+00811x
Open: no restriction [A]
Built: 1961, Reconstructed: 2014
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.5 Miles (0.8 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Girder and floorbeam system [03]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]

Bridge Dimensions
Length: 170 m = 557.8 ft
Main Spans: 4 at 47.2 m = 154.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 8.5 m = 27.9 ft (2 Lanes) and Out-To-Out: 9.7 m = 31.8 ft for a 11.6 m = 38.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Unknown [00000]: Stillwater County [095], Montana [30]
Owned by State Highway Agency [01], DOT District: 5
5.6M E REEDPOINT

Condition
Deck: Fair [5]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 32.7 metric ton = 36.0 tons (Unknown [B])
Inventory: 32.7 metric ton = 36.0 tons (Unknown [B])

Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Basically intolerable requiring high priority of corrrective action [3]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: August 1999 [899] 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: 0.1 km = 0.1 mi
Traffic
ADT: 4567 (2019) and Trucks: 24%
Future ADT: 9864 (In 2039 )