Bridge Type
Main Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Low slump Concrete [4]
Bridge Dimensions
Length: 184.1 m = 604.0 ft
Main Spans: 7 at 33.5 m = 109.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 17.1 m = 56.1 ft (4 Lanes) and Out-To-Out: 22.6 m = 74.2 ft for a 17.1 m = 56.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Amity [01945]: Polk County [153], Iowa [19]
Owned by State Highway Agency [01], DOT District: 1
3.6 MI. W OF JCT. I-235
Condition
Deck: Good [7]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: M 18 / H 20 [4]
Operating: 53.9 metric ton = 59.3 tons (Allowable Stress(AS) [2])
Inventory: 33.8 metric ton = 37.2 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: April 1999 [499] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 22500 (2019) and Trucks: 3%
Future ADT: 22500 (In 2039
)
