GROSSE ILE PARKWAY over TRENTON CHANNEL (Route: 2057)
Num:12006x
Bridge closed to all traffic [K]
Built: 1932, Reconstructed: 2007
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Movable - Swing [17]
Approach Span(s): Steel [3] Girder and floorbeam system [03]
Deck: Open Grating [3] with Wearing Surface:

Bridge Dimensions
Length: 410.2 m = 1345.9 ft
Main Spans: 2 at 51.8 m = 170.0 ft
Approach Spans: 10
Skew: 0
Width, Roadway: 6.1 m = 20.0 ft (2 Lanes) and Out-To-Out: 9.7 m = 31.8 ft for a 12.2 m = 40.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0.3 m = 1.0 ft

Location
Grosse Ile [35420]: Wayne County [163], Michigan [26]
Owned by County Highway Agency [02], DOT District: 7
GROSSE ILE

Condition
Deck: Good [7]
Superstructure: Poor [4]
Substructure: Poor [4]
Loading
Design: MS 18+Mod / HS 20+Mod [6]
Operating: 29.5 metric ton = 32.5 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 22.7 metric ton = 25.0 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])

Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry:
Road Alignment: Meets minimum tolerable limits to be left in place as is [4]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required. [4]
Inspections
Date: June 2020 [0620] and Frequency: 12

Future Work
Work Needed:
Bridge Detour: 20 km = 12.4 mi
Traffic
ADT: 22180 (2007) and Trucks: 2%
Future ADT: 27060 (In 2027 )

GROSSE ILE PARKWAY over WEST RIVER ROAD (Route: 2057)
Num:12007x
Open: no restriction [A]
Built: 2019, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.2 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: Monolithic Concrete (concurrently placed with structural deck) [1]

Bridge Dimensions
Length: 15.2 m = 49.9 ft
Main Spans: 1 at 14.2 m = 46.6 ft
Approach Spans: 0
Skew: 2
Width, Roadway: 8.5 m = 27.9 ft (2 Lanes) and Out-To-Out: 13.1 m = 43.0 ft for a 9.1 m = 29.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Grosse Ile [35440]: Wayne County [163], Michigan [26]
Owned by County Highway Agency [02], DOT District: 7
GROSSE ILE T E/TRENTON CH

Condition
Deck: Excellent [9]
Superstructure: Excellent [9]
Substructure: Excellent [9]
Loading
Design: Greater than HL93 [B]
Operating: 35 metric ton = 38.5 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 20.7 metric ton = 22.8 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: Equal to present desirable criteria [8]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: February 2021 [0221] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 1.3 km = 0.8 mi
Traffic
ADT: 21198 (1995) and Trucks: 2%
Future ADT: 16574 (In 2015 )

WEST RIVER ROAD over THOROFARE CANAL (Route: 2057)
Num:12210x
Open: no restriction [A]
Built: 1935, Reconstructed: 1995
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.2 Kilometers)

Bridge Type
Main Span(s): Prestressed concrete [5] Box beam or girders - Multiple [05]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Bridge Dimensions
Length: 29.2 m = 95.8 ft
Main Spans: 3 at 14 m = 45.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 12.2 m = 40.0 ft (2 Lanes) and Out-To-Out: 13.1 m = 43.0 ft for a 11 m = 36.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Grosse Ile [35420]: Wayne County [163], Michigan [26]
Owned by County Highway Agency [02], DOT District: 7
GROSSE ILE N/GROSS I PKWY

Condition
Deck: Good [7]
Superstructure: Very Good [8]
Substructure: Satisfactory [6]
Loading
Design: MS 18+Mod / HS 20+Mod [6]
Operating: 97.2 metric ton = 106.9 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 63.8 metric ton = 70.2 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])

Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Better than present minimum criteria [7]
Waterway: Better than present minimum criteria [7] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: October 2020 [1020] and Frequency: 12

Future Work
Work Needed:
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 2803 (1995) and Trucks: 2%
Future ADT: 2402 (In 2015 )