Road Stream Crossing Site PIGN_PR01

Pigeon River Watershed, Unnamed
Sparr Rd
Otsego County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.0416023,-84.5893647
T 031N R 002 Sec 29
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 0.54 tons/year
Overall Score: 19
Severity: Moderate
Date Inventoried: 9/9/2021
Road Approach - Left
Road Approach - Left
Road Approach - Right
Road Approach - Right
Upstream Conditions
Upstream Conditions
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: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
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 43 ft. Width 2 ft. Height 2 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.2 ft./sec.
Structure Outlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.8 ft./sec.
*Water Velocities were measured 1.4 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: 0.9 ft.
Bankfull Width: 10 ft.
Wetted Width: 4 ft.
Water Velocity: 1.1 ft./sec.
Dominant Substrate: Organics decomposing plant material
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: 23 ft.
Location of Low Point: Other
Runoff Path: Roadway
Fill Depth: 6 ft.
Slope: Gentle, 3:1, 15, or 33%
Fill Depth: 4 ft.
Slope: Gentle, 3:1, 15, or 33%
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: 200 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.54 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.54 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, Leafy spurge.
Site Comments: Wetland drainage into the pigeon.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.