Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Deck: Open Grating [3] with Wearing Surface: Other [9]
Bridge Dimensions
Length: 80.7 m = 264.8 ft
Main Spans: 1 at 56.2 m = 184.4 ft
Approach Spans: 4
Skew: 0
Width, Roadway: 14 m = 45.9 ft (2 Lanes) and Out-To-Out: 20.1 m = 65.9 ft for a 14 m = 45.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 4.9 m = 16.1 ft
Location
Unknown [01051]: Cook County [031], Illinois [17]
Owned by City or Municipal Highway Agency [04], DOT District: 1
847 N HALSTED ST
Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 56.1 metric ton = 61.7 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 33.7 metric ton = 37.1 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: Superior to present desirable criteria [9]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: September 1999 [999] 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: 15700 (2018) and Trucks: 11%
Future ADT: 16068 (In 2032
)