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Nearby Bridges in NBI 2021: 1


M-21 over GRAND RIVER (Route: 21)
Num:4854x
Open: no restriction [A]
Built: 2010, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Prestressed concrete [5] 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: 146.3 m = 480.0 ft
Main Spans: 6 at 25.2 m = 82.7 ft
Approach Spans: 0
Skew: 35
Width, Roadway: 19.9 m = 65.3 ft (4 Lanes) and Out-To-Out: 25.4 m = 83.3 ft for a 19.9 m = 65.3 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Sparta [75440]: Kent County [081], Michigan [26]
Owned by State Highway Agency [01], DOT District: 3
6.4 MI E OF I-96
Condition
Deck: Good [7]
Superstructure: Very Good [8]
Substructure: Good [7]
Loading
Design: Greater than HL93 [B]
Operating: 61.9 metric ton = 68.1 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 35.3 metric ton = 38.8 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: Better than present minimum criteria [7]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: October 2020 [1020] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 1.6 km = 1.0 mi
Traffic
ADT: 23900 (2009) and Trucks: 4%
Future ADT: 30600 (In 2029 )

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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