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Nearby Bridges in NBI 2021: 2


SW BLACKHAWK AV over MILLER CREEK (Route: 0)
Num:203761x
Open: no restriction [A]
Built: 2004, 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): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Wood or Timber [8] with Wearing Surface: Gravel [8]
Bridge Dimensions
Length: 20.1 m = 65.9 ft
Main Spans: 1 at 19.2 m = 63.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 7.3 m = 24.0 ft (2 Lanes) and Out-To-Out: 7.3 m = 24.0 ft for a 9.1 m = 29.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Johnson County [103], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
78081904
Condition
Deck: Fair [5]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 31.8 metric ton = 35.0 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 24.6 metric ton = 27.1 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: July 2020 [0720] and Frequency: 24
Future Work
Work Needed: Widening of existing bridge with deck rehabilitation or replacement. [34]
Bridge Detour: 0.6 km = 0.4 mi
Traffic
ADT: 10 (2018) and Trucks: 0%
Future ADT: 10 (In 2040 )
SW BUCHANAN AVE over DRAINAGE (Route: 0)
Num:359275x
Open: no restriction [A]
Built: 1974, Reconstructed: 2018
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 [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Wood or Timber [8] with Wearing Surface: Wood or Timber [7]
Bridge Dimensions
Length: 12.2 m = 40.0 ft
Main Spans: 1 at 12.2 m = 40.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 4.6 m = 15.1 ft (1 Lanes) and Out-To-Out: 4.6 m = 15.1 ft for a 7 m = 23.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Johnson County [103], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
78082004
Condition
Deck: Very Good [8]
Superstructure: Satisfactory [6]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 51.6 metric ton = 56.8 tons (Allowable Stress(AS) [2])
Inventory: 37.4 metric ton = 41.1 tons (Allowable Stress(AS) [2])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Better than present minimum criteria [7]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present minimum criteria [6] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
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: 10 km = 6.2 mi
Traffic
ADT: 15 (2018) and Trucks: 0%
Future ADT: 15 (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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