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Nearby Bridges in NBI 2021: 2


410 140TH ST over BOONE RIVER (Route: 0)
Num:172940x
Posted for load [P]
Built: 1927, Reconstructed: N/A [0000]
Historic: Bridge is possibly eligible for the NRHP. [3]

Google Streetview (If Available)

Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Concrete [1] 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: 15.5 m = 50.9 ft
Main Spans: 2 at 7.6 m = 24.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 5.9 m = 19.4 ft (2 Lanes) and Out-To-Out: 6.6 m = 21.7 ft for a 7.6 m = 24.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Hancock County [081], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
94261501
Condition
Deck: Fair [5]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design:
Operating: 27.8 metric ton = 30.6 tons (Allowable Stress(AS) [2])
Inventory: 15.2 metric ton = 16.7 tons (Allowable Stress(AS) [2])
Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
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 minimum criteria [6] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: April 1999 [499] 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: 0.3 km = 0.2 mi
Traffic
ADT: 20 (2015) and Trucks: 0%
Future ADT: 20 (In 2039 )
1450 DEER AVE over BOONE RIVER (Route: 0)
Num:172930x
Posted for load [P]
Built: 1968, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.7 Kilometers)

Bridge Type
Main Span(s): Wood or timber [7] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Wood or Timber [8] with Wearing Surface: Gravel [8]
Bridge Dimensions
Length: 21 m = 68.9 ft
Main Spans: 3 at 7 m = 23.0 ft
Approach Spans: 0
Skew: 12
Width, Roadway: 6.1 m = 20.0 ft (2 Lanes) and Out-To-Out: 6.1 m = 20.0 ft for a 6.1 m = 20.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Hancock County [081], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
94261002
Condition
Deck: Fair [5]
Superstructure: Satisfactory [6]
Substructure: Serious [3]
Loading
Design:
Operating: 19.3 metric ton = 21.2 tons (Allowable Stress(AS) [2])
Inventory: 15.3 metric ton = 16.8 tons (Allowable Stress(AS) [2])
Appraisal
Structural: Basically intolerable requiring high priority of corrrective action [3]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Better than present minimum criteria [7]
Waterway: Better than present minimum criteria [7] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: March 2020 [0320] and Frequency: 12
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 10 (2015) and Trucks: 0%
Future ADT: 10 (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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