I-270 EB & WB over CHAIN OF ROCKS CANAL (Route: 270)
Num:60034500000000x
Open: no restriction [A]
Built: 2014, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.2 Miles (0.4 Kilometers)

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:

Bridge Dimensions
Length: 603.7 m = 1980.7 ft
Main Spans: 5 at 149.4 m = 490.2 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 26.8 m = 87.9 ft (4 Lanes) and Out-To-Out: 28.7 m = 94.2 ft for a 26.8 m = 87.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 14.9 m = 48.9 ft

Location
Unknown [03445]: Madison County [119], Illinois [17]
Owned by State Highway Agency [01], DOT District: 8
2 MI E MISSISSIPPI R

Condition
Deck: Very Good [8]
Superstructure: Very Good [8]
Substructure: Very Good [8]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 77.8 metric ton = 85.6 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 60.3 metric ton = 66.3 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])

Appraisal
Structural: Equal to present desirable criteria [8]
Deck Geometry: Superior to present desirable criteria [9]
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 2020 [0620] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 2.7 km = 1.7 mi
Traffic
ADT: 44600 (2019) and Trucks: 20%
Future ADT: 66700 (In 2032 )

OLD CHAIN RKS RD/O over CHAIN OF ROCKS CANAL (Route: 0)
Num:60006800000000x
Posted for load [P]
Built: 1949, Reconstructed: 1999
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.3 Miles (0.4 Kilometers)

Bridge Type
Main Span(s): Steel [3] Truss - Thru [10]
Approach Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Deck: Open Grating [3] with Wearing Surface:

Bridge Dimensions
Length: 721.8 m = 2368.2 ft
Main Spans: 17 at 141.1 m = 462.9 ft
Approach Spans: 2
Skew: 0
Width, Roadway: 5.4 m = 17.7 ft (1 Lanes) and Out-To-Out: 9.4 m = 30.8 ft for a 6.7 m = 22.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 15.2 m = 49.9 ft

Location
Unknown [03445]: Madison County [119], Illinois [17]
Owned by City or Municipal Highway Agency [04], DOT District: 8
1.3 M E MISS R

Condition
Deck: Good [7]
Superstructure: Serious [3]
Substructure: Good [7]
Loading
Design: M 18 / H 20 [4]
Operating: 18.8 metric ton = 20.7 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 11 metric ton = 12.1 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])

Appraisal
Structural: Basically intolerable requiring high priority of corrrective action [3]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: November 1999 [1199] and Frequency: 24

Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 6.8 km = 4.2 mi
Traffic
ADT: 225 (2016) and Trucks: 22%
Future ADT: 424 (In 2032 )