Road Stream Crossing Site PIGN_PR09
Pigeon River Watershed, Unnamed
Hardwood Lake Trail
Otsego County
Information collected by:
Site Location
GPS Coordinates: 45.1741636,-84.4245683
T 032N R 001 Sec 10
Fish Passability: Barrier
Perch Height: 1.2 ft.
Total Erosion: 3.31 tons/year
Overall Score: 44
Severity: Severe
Date Inventoried: 9/8/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Light superficial corrosion or abrasion or chipping or spalling or cracking. No shape changes (described above).
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 63 ft. Width 1.5 ft. Height 1.5 ft.
Percentage Plugged: 81% - 100% Inside
Percentage Crushed: 1% - 20%
Perch Height: 1.2 ft.
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.4 ft./sec.
*Water Velocities were measured 0.1 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: = Bankfull – Water has completely filled the stream channel, but is not flowing onto the floodplain.
Stream Flow Type: Concentrated Wetland Flow.
Is Scour Pool Present? Yes
Scour Pool: Length 7 ft., Width 5 ft., Depth 0.3 ft.
Is Upstream Ponding Present? Yes
Pond: Length 500 ft., Width 200 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 6 ft.
Wetted Width: 3 ft.
Water Velocity: 0 ft./sec. (measured via Flow Meter)
Dominant Substrate: Silt – very fine particles that don't stick together
Road Information
Road Surface: Gravel
Owner: County
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 21 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 6 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 6 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 600 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 2.36 tons/year
Right Approach
Length: 300 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.95 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 3.31 tons/year
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? Yes, Replacement.
Were any non-native species observerd at this site? No
Site Comments: Unknown ponding cause
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.