Road Stream Crossing Site PIGN_PR35
Pigeon River Watershed, Unnamed
Sparr Rd
Otsego County
Information collected by:
Site Location
GPS Coordinates: 45.0417364,-84.533538
T 031N R 002 Sec 34
Fish Passability: Barrier
Perch Height: 2.3 ft.
Total Erosion: 0.67 tons/year
Overall Score: 28
Severity: Severe
Date Inventoried: 10/8/2021
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 68 ft. Width 3 ft. Height 3 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Perch Height: 2.3 ft.
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.4 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.1 ft./sec.
*Water Velocities were measured 0.2 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 20 ft., Width 13 ft., Depth 2.5 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 4 ft.
Wetted Width: 4 ft.
Water Velocity: 0.4 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: 23.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.3 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 1.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 1000 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.62 tons/year
Right Approach
Length: 1000 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.05 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.67 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? Yes, Spurge, bitterswet nightshade.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.