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Nearby Bridges in NBI 2021: 1


US 30 over MISSISSIPPI RVR RR S 2ND (Route: 30)
Num:20860x
Open: no restriction [A]
Built: 1956, Reconstructed: 1999
Historic: Bridge is eligible for the NRHP. [2]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.6 Kilometers)

Bridge Type
Main Span(s): Steel [3] Suspension [13]
Approach Span(s): Steel continuous [4] Girder and floorbeam system [03]
Deck: Concrete Cast-in-Place [1] with Wearing Surface:
Bridge Dimensions
Length: 1269.5 m = 4165.2 ft
Main Spans: 1 at 196.3 m = 644.1 ft
Approach Spans: 30
Skew: 0
Width, Roadway: 8.9 m = 29.2 ft (2 Lanes) and Out-To-Out: 10 m = 32.8 ft for a 12.2 m = 40.0 ft approaching roadway.
Vertical Clearance: 9.75 m = 32.0 ft and Navigational Clearance: 19.5 m = 64.0 ft
Location
Unknown [01415]: Clinton County [045], Iowa [19]
Owned by State Highway Agency [01], DOT District: 6
IN CLINTON
Condition
Deck: Satisfactory [6]
Superstructure: Serious [3]
Substructure: Serious [3]
Loading
Design: MS 18 / HS 20 [5]
Operating: 45.4 metric ton = 49.9 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 27.2 metric ton = 29.9 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Appraisal
Structural: Basically intolerable requiring high priority of corrrective action [3]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Better than present minimum criteria [7]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: October 2020 [1020] and Frequency: 12
Future Work
Work Needed:
Bridge Detour: 1 km = 0.6 mi
Traffic
ADT: 11900 (2019) and Trucks: 12%
Future ADT: 11900 (In 2040 )

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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