Road Stream Crossing Site MAN_CR_003
Big Manistee River Watershed, Manistee River
M-72
Frederic Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.69283
, -84.84731
T27N
R4W
Sec 31
Owned by Private
Structure is NOT Perched
Total Erosion: 1.7983 tons/year
Severity: Moderate
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 35 ft.
, Width 58 ft.
, Height 11 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 ft./sec.
Structure Outlet
Water Depth: 2.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 ft./sec.
*Water Velocities were measured 2 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 2.6 ft.
Bankfull Width: 40 ft.
Wetted Width: 35 ft.
Water Velocity: 2 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 34 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.8
Erosion: 0.8992 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.8
Erosion: 0.8992 tons/year
Erosion Information
Total Erosion at Crossing: 1.7983 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.