Road Stream Crossing Site PIGN_PG078

Pigeon River Watershed, Pigeon River
Pigeon River Campground
Otsego County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.1775000000001,-84.4260399999999
T Corwith TwpN R 01W Sec 9
Owned by State
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 0.29 tons/year
Overall Score: 14
Severity: Minor
Date Inventoried: 4/26/2022
Road Approach - Left
Road Approach - Left
Road Approach - Right
Road Approach - Right
Inlet
Inlet
Upstream Conditions
Upstream Conditions
Outlet
Outlet
Downstream Conditions
Downstream Conditions
Representative Reach
Representative Reach
Other
Other
Crossing Information*
Type of Crossing: Bridge
Number of Structures: 1
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 30 to 70 degrees
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: None
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 34 ft. Width 44 ft. Height 5.7 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.3 ft./sec.
Structure Outlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.9 ft./sec.
*Water Velocities were measured 1.6 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < Bankfull The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1.9 ft.
Bankfull Width: 37.2 ft.
Wetted Width: 34.7 ft.
Water Velocity: 2.6 ft./sec. (measured via Flow Meter)
Dominant Substrate: Gravel rocks between the size of a pinhead and a baseball
Road Information
Road Surface: Gravel
Owner: State
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: 31.2 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 0 ft.
Slope: Vertical, 0:1, or 90
Downstream
Fill Depth: 0 ft.
Slope: Vertical, 0:1, or 90
Approaches
Left Approach
Length: 0 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Right Approach
Length: 90 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.29 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.29 tons/year
Summary Information
Fish Passability: Barrier at Most Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Mulein.
Site Comments: Changed to not a barrier. Bridge is recentlyrepkaced with an adequately sized structure.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.