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Nearby Bridges in NBI 2021: 2


COMSTOCK ROAD over BLACK RIVER (Route: 7794)
Num:10077x
Open: no restriction [A]
Built: 1996, Reconstructed: N/A [0000]
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0 Miles (0 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: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 74 m = 242.8 ft
Main Spans: 3 at 24.7 m = 81.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 10.6 m = 34.8 ft (2 Lanes) and Out-To-Out: 11.4 m = 37.4 ft for a 8.5 m = 27.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Grant [34420]: St. Clair County [147], Michigan [26]
Owned by County Highway Agency [02], DOT District: 4
SEC 17 GRANT TWP
Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 69.3 metric ton = 76.2 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 41.5 metric ton = 45.7 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: Equal to present minimum criteria [6]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Better than present minimum criteria [7] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: February 2021 [0221] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.8 km = 0.5 mi
Traffic
ADT: 1025 (1994) and Trucks: 3%
Future ADT: 1525 (In 2014 )
GRAHAM ROAD over PLUM CREEK (Route: 0)
Num:10172x
Open: no restriction [A]
Built: 1996, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.5 Miles (0.7 Kilometers)

Bridge Type
Main Span(s): Steel [3] Culvert [19]
Approach Span(s): Other [00]
Deck: Wood or Timber [8] with Wearing Surface: Wood or Timber [7]
Bridge Dimensions
Length: 7.6 m = 24.9 ft
Main Spans: 1 at 7 m = 23.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 4 m = 13.1 ft (2 Lanes) and Out-To-Out: 14.6 m = 47.9 ft for a 6.7 m = 22.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Grant [34420]: St. Clair County [147], Michigan [26]
Owned by County Highway Agency [02], DOT District: 4
SEC 19-20 GRANT TWP
Condition
Deck: Not Applicable [N]
Superstructure: Not Applicable [N]
Substructure: Not Applicable [N]
Loading
Design: MS 18 / HS 20 [5]
Operating: 40.2 metric ton = 44.2 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 33.4 metric ton = 36.7 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Appraisal
Structural: Better than present minimum criteria [7]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Waterway: Equal to present minimum criteria [6] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: February 1999 [299] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 115 (1994) and Trucks: 0%
Future ADT: 200 (In 2014 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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