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Nearby Bridges in NBI 2021: 2


IA 10 over BIG SIOUX RIVER (Route: 10)
Num:48451x
Open: no restriction [A]
Built: 1991, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.3 Miles (0.5 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: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 157.9 m = 518.1 ft
Main Spans: 6 at 29.6 m = 97.1 ft
Approach Spans: 0
Skew: 15
Width, Roadway: 12.2 m = 40.0 ft (2 Lanes) and Out-To-Out: 13.2 m = 43.3 ft for a 13.4 m = 44.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Sioux County [167], Iowa [19]
Owned by State Highway Agency [01], DOT District: 3
At S Dakota St. Line
Condition
Deck: Satisfactory [6]
Superstructure: Good [7]
Substructure: Very Good [8]
Loading
Design: MS 18 / HS 20 [5]
Operating: 60 metric ton = 66.0 tons (Allowable Stress(AS) [2])
Inventory: 33.3 metric ton = 36.6 tons (Allowable Stress(AS) [2])
Appraisal
Structural: Better than present minimum criteria [7]
Deck Geometry: Better than present minimum criteria [7]
Road Alignment: Better than present minimum criteria [7]
Waterway: Equal to present minimum criteria [6] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: October 1999 [1099] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.6 km = 0.4 mi
Traffic
ADT: 1970 (2019) and Trucks: 20%
Future ADT: 1970 (In 2039 )
SD46 over BIG SIOUX RIVER (Route: 46)
Num:64160023x
Open: no restriction [A]
Built: 1991, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.3 Miles (0.5 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: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 157.9 m = 518.1 ft
Main Spans: 6 at 29.6 m = 97.1 ft
Approach Spans: 0
Skew: 15
Width, Roadway: 12.2 m = 40.0 ft (2 Lanes) and Out-To-Out: 13.2 m = 43.3 ft for a 13.4 m = 44.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Sioux Valley [59140]: Union County [127], South Dakota [46]
Owned by State Highway Agency [01], DOT District: 2
At South Dakota Border
Condition
Deck: Satisfactory [6]
Superstructure: Good [7]
Substructure: Very Good [8]
Loading
Design: MS 18 / HS 20 [5]
Operating: 60 metric ton = 66.0 tons (Allowable Stress(AS) [2])
Inventory: 33.3 metric ton = 36.6 tons (Allowable Stress(AS) [2])
Appraisal
Structural: Better than present minimum criteria [7]
Deck Geometry: Better than present minimum criteria [7]
Road Alignment: Better than present minimum criteria [7]
Waterway: Equal to present minimum criteria [6] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: October 2020 [1020] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.6 km = 0.4 mi
Traffic
ADT: 1610 (2019) and Trucks: 24%
Future ADT: 2495 (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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