320TH ST over FIELD STREAM (Route: 0)
Num:93130x
Open: no restriction [A]
Built: 0, Reconstructed: 1988
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0 Miles (0.1 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: Other [9]

Bridge Dimensions
Length: 7 m = 23.0 ft
Main Spans: 1 at 7 m = 23.0 ft
Approach Spans: 0
Skew: 30
Width, Roadway: 6.8 m = 22.3 ft (2 Lanes) and Out-To-Out: 7 m = 23.0 ft for a 7.9 m = 25.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Unknown [00000]: Carroll County [027], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
82333001

Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design:
Operating: 33.9 metric ton = 37.3 tons (Allowable Stress(AS) [2])
Inventory: 23.5 metric ton = 25.9 tons (Allowable Stress(AS) [2])

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: 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: June 1999 [699] and Frequency: 24

Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 0.8 km = 0.5 mi
Traffic
ADT: 30 (2016) and Trucks: 0%
Future ADT: 30 (In 2039 )

LOCAL over FIELD STREAM (Route: 0)
Num:93091x
Open: no restriction [A]
Built: 1995, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.6 Kilometers)

Bridge Type
Main Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Gravel [8]

Bridge Dimensions
Length: 9.8 m = 32.2 ft
Main Spans: 1 at 8.5 m = 27.9 ft
Approach Spans: 0
Skew: 45
Width, Roadway: 6.2 m = 20.3 ft (2 Lanes) and Out-To-Out: 6.3 m = 20.7 ft for a 7.9 m = 25.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Unknown [00000]: Carroll County [027], Iowa [19]
Owned by County Highway Agency [02], DOT District: 0
82332902

Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 31.7 metric ton = 34.9 tons (Load Factor(LF) [1])
Inventory: 19 metric ton = 20.9 tons (Load Factor(LF) [1])

Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: July 1999 [799] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.6 km = 0.4 mi
Traffic
ADT: 20 (2016) and Trucks: 0%
Future ADT: 20 (In 2039 )