Road Stream Crossing Site PIGN_PR31
Pigeon River Watershed, Unnamed
Sparr Rd
Otsego County
Information collected by:
Site Location
GPS Coordinates: 45.0416804,-84.5784377
T 031N R 002 Sec 32
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 0.12 tons/year
Overall Score: 36
Severity: Severe
Date Inventoried: 9/9/2021
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: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Major deterioration from corrosion or abrasion (5-10% of the structure is rusted through) or cracking or spalling or chipping (medium sized cracks, widespread chipping, exposed metal reinforcement). OR Major shape changes (described above) reducing the capacity of the structure by less than 30%. OR segment disconnection (segments of concrete or metal culvert disconnecting internally) but no evidence of water piping.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 38 ft. Width 2 ft. Height 2 ft.
Percentage Plugged: 21% - 40% Inlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.2 ft./sec.
Structure Outlet
Water Depth: 1.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.3 ft./sec.
*Water Velocities were measured 1.2 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? Yes
Scour Pool: Length 6 ft., Width 5.5 ft., Depth 1.6 ft.
Is Upstream Ponding Present? Yes
Pond: Length 6 ft., Width 6 ft.
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 16 ft.
Wetted Width: 12 ft.
Water Velocity: 1.4 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: 28 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.5 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 3.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 1000 ft.
Slope: < 1%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.06 tons/year
Right Approach
Length: 1000 ft.
Slope: < 1%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.06 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.12 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? No
Site Comments: Undersized culvert
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.