Road Stream Crossing Site PIGN_PR02

Pigeon River Watershed, Pigeon River
Marquardt Rd
Otsego County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.0466873,-84.5823568
T 031N R 002 Sec 29
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 8.45 tons/year
Overall Score: 28
Severity: Severe
Date Inventoried: 9/9/2021
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
Site Sketch
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Apron
Outlet Type: Outlet Apron
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 67 ft. Width 5 ft. Height 4 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.4 ft./sec.
Structure Outlet
Water Depth: 2.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.2 ft./sec.
*Water Velocities were measured 2.3 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < 1/2 Bankfull The stream channel is less than half filled with water.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? Yes
Scour Pool: Length 30 ft., Width 20 ft., Depth 5 ft.
Is Upstream Ponding Present? Yes
Pond: Length 50 ft., Width 25 ft.
Riffle Information
Water Depth: 1.7 ft.
Bankfull Width: 17 ft.
Wetted Width: 15 ft.
Water Velocity: 0.5 ft./sec. (measured via Flow Meter)
Dominant Substrate: Sand particles are smaller than a pinhead and feel gritty between fingers
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: 28 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.4 ft.
Slope: Moderate, 2:1, 22.5, or 41%
Downstream
Fill Depth: 4 ft.
Slope: Gentle, 3:1, 15, or 33%
Approaches
Left Approach
Length: 1000 ft.
Slope: > 10%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 8.4 tons/year
Right Approach
Length: 1000 ft.
Slope: > 10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.05 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 8.45 tons/year
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Spotted knapweed, queen annes lace.
Site Comments: Under sized culvert
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.