Bridge Type
Main Span(s): Steel [3] Truss - Thru [10]
Approach Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface:
Bridge Dimensions
Length: 154.8 m = 507.9 ft
Main Spans: 1 at 92.8 m = 304.5 ft
Approach Spans: 4
Skew: 0
Width, Roadway: 13.4 m = 44.0 ft (4 Lanes) and Out-To-Out: 16.9 m = 55.4 ft for a 13.4 m = 44.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 11.6 m = 38.1 ft
Location
Unknown [00000]: Cook County [031], Illinois [17]
Owned by State Highway Agency [01], DOT District: 1
.1MI S OF 171:N JCT
Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 50.5 metric ton = 55.6 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 30.1 metric ton = 33.1 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Better than present minimum criteria [7]
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 Detour: 1.6 km = 1.0 mi
Traffic
ADT: 31400 (2019) and Trucks: 5%
Future ADT: 29458 (In 2032
)