Road Stream Crossing Site CLHW_GCBM-003

Greene Creek-Black Mallard River Watershed, Grace Creek
Grace Harbor Rd
Bearinger Twp, Presque Isle County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.5520100000001,-84.13239
T 037NN R 002E Sec 25
Owned by Private
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 1.95 tons/year
Overall Score: 4
Severity: Minor
Date Inventoried: 4/26/2022
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: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 54 ft. Width 10 ft. Height 5.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.6 ft./sec.
Structure Outlet
Water Depth: 2.4 ft.
Embedded Depth of Structure: 0.6 ft.
Water Velocity*: 1.2 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? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 2.3 ft.
Bankfull Width: 11.5 ft.
Wetted Width: 10 ft.
Water Velocity: 2.2 ft./sec. (measured via Flow Meter)
Dominant Substrate: Sand particles are smaller than a pinhead and feel gritty between fingers
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: 17 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 1.3 ft.
Slope: Gentle, 3:1, 15, or 33%
Fill Depth: 1.5 ft.
Slope: Gentle, 3:1, 15, or 33%
Left Approach
Length: 610 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 1.95 tons/year
Right Approach
Length: 0 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.95 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? No
Site Comments: Not a barrier, culvert has recently been replaced.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.