Road Stream Crossing Site MAN_MI_012
Big Manistee River Watershed, Hopkins Creek
Dickerson Rd
Bloomfield Twp,
Missaukee County
Information collected by:
Site Location
GPS Coordinates: 44.43604
, -85.25705
T24N
R8W
Sec 34
Owned by Private
Structure is NOT Perched
Total Erosion: 6.9099 tons/year
Severity: Severe
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: Other
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 27 ft.
, Width 25 ft.
, Height 5.3 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.9 ft./sec.
Structure Outlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.8 ft./sec.
*Water Velocities were measured 0.7 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 40 ft.
, Width 33 ft.
, Depth 2.8 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 24.6 ft.
Wetted Width: 22.8 ft.
Water Velocity: 1.5 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 25 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: Heavy
LS Factor: 0.57
Erosion: 3.9256 tons/year
Right Approach
Length: 790 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.549
Erosion: 2.9843 tons/year
Erosion Information
Total Erosion at Crossing: 6.9099 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.