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Nearby Bridges in NBI 2021: 1


FM over DM RIVER (Route: 0)
Num:184890x
Open: no restriction [A]
Built: 1958, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.2 Miles (0.4 Kilometers)

Bridge Type
Main Span(s): Prestressed concrete continuous [6] 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: 75.3 m = 247.1 ft
Main Spans: 3 at 25 m = 82.0 ft
Approach Spans: 0
Skew: 30
Width, Roadway: 8.6 m = 28.2 ft (2 Lanes) and Out-To-Out: 10.4 m = 34.1 ft for a 8.5 m = 27.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Humboldt County [091], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
92300705
Condition
Deck: Satisfactory [6]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: M 18 / H 20 [4]
Operating: 30.7 metric ton = 33.8 tons ()
Inventory: 22.7 metric ton = 25.0 tons ()
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Superior to present desirable criteria [9]
Waterway: Better than present minimum criteria [7] and Countermeasures have been installed to mitigate an existing problem with scour. [7]
Inspections
Date: November 2020 [1120] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 680 (2019) and Trucks: 45%
Future ADT: 680 (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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