Road Stream Crossing Site ST034
Sturgeon River Watershed, Sturgeon River tributary
Trowbridge Rd
Nunda Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.247792
, -84.594781
T33N
R02W
Sec 18
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 1.6701 tons/year
Severity: Moderate
Year Inventoried: 2015
Site ID
Inlet
Outlet
Downstream Conditions
Upstream Conditions
Road Approach - Left
Road Approach - Right
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: Fair
Structure Interior: smooth
Dimensions of Structure: Length 45.1 ft.
, Width 4.5 ft.
, Height 3.6 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 1.8 ft./sec.
Structure Outlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 1.8 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
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: 1.4 ft.
Bankfull Width: 12.8 ft.
Wetted Width: 11.7 ft.
Water Velocity: 1 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Gravel
State Road
Road Condition: Good
Road Width at Culvert: 31.4 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4 ft.
Slope: 1:1.5
Downstream
Fill Depth: 4 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 313.7 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.463
Erosion: 1.2557 tons/year
Right Approach
Length: 123.1 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.389
Erosion: 0.4145 tons/year
Erosion Information
Total Erosion at Crossing: 1.6701 tons/year
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Beaver dams upstream; high flows
These non-native species were observerd at this site: Wild parsnip, spotted knapweed, reed canary grass