Road Stream Crossing Site PIGN_PR15
Pigeon River Watershed, Pigeon River
Webb Rd
Charlevoix County
Information collected by:
Site Location
GPS Coordinates: 45.2719851,-84.4598834
T 033N R 001 Sec 08
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 3.31 tons/year
Overall Score: 1
Severity: Minor
Date Inventoried: 9/7/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Bridge
Number of Structures: 1
Structure Shape: Native Bottom Arch
Inlet Type: Headwall and Wingwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Rock
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 32 ft. Width 57 ft. Height 7.6 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.6 ft./sec.
Structure Outlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.4 ft./sec.
*Water Velocities were measured 1.4 ft. below the surface (via Flow Meter).
Additional Comments
Bridge replaced 2011
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: 2.2 ft.
Bankfull Width: 4 ft.
Wetted Width: 38 ft.
Water Velocity: 2.2 ft./sec. (measured via Flow Meter)
Dominant Substrate: Cobble – baseball-sized or larger rocks (10in)
Road Information
Road Surface: Paved
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: 30 ft.
Location of Low Point: Other
Runoff Path: Ditch
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: None, Ditch has been recently graded and is bare of vegetation.
Erosion Estimate: 0 tons/year
Right Approach
Length: 445 ft.
Slope: < 1%
Vegetation: None, Ditch has been recently graded and is bare of vegetation.
Erosion Estimate: 3.31 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 3.31 tons/year
Summary Information
Fish Passability: Not a Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Burdock, queen annes lace.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.