Road Stream Crossing Site UBR_MB10.3

Upper Black River Watershed, Unknown
Clark Bridge Rd
Nunda Twp, Cheboygan County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.24446 , -84.40556
T33N R1W Sec 14
Owned by State
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 5.8881 tons/year
Severity: Severe
Year Inventoried: 2014
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Right
Road Approach - Left
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Poor
Structure Interior: corrugated
Dimensions of Structure: Length 30 ft. , Width 1.25 ft. , Height 1.25 ft.
Percentage Plugged: Inlet: 51% to 75% Outlet: 0% In Pipe: 0%
Structure is NOT Perched
Water Depth: 0 ft.
Embedded Depth of Structure: 1.25 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Additional Comments
PRC; wetland area; upstream end of culvert was completely covered with sediment
Stream Information
Stream Flow: Less than 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: 0 ft.
Bankfull Width: 0 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec.
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 18.3 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.1 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1.95 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 2.8736 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 2.8736 tons/year
Erosion Information
Total Erosion at Crossing: 5.8881 tons/year
Extent of Erosion: Severe
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Road probably floods with high rain and washes material into the stream
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Upstream Streambank
4.7 ft.
10.5 ft.
1.5 ft.
yes
Gravel
0.141
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site. large amount of sediment washing into stream; culvert is completely plugged at the inlet
A future visit to this site is recommended. culvert is completely plugged
These non-native species were observerd at this site: Leafy Spurge, Sweet Clover