Road Stream Crossing Site EUP_Hessel 1
Les Cheneaux Islands Watershed, Unknown
Forest Access Road
Mackinac County
Information collected by:
MiDNR
Site Location
GPS Coordinates: 46.035049,-84.4454878
T 042N R 001 Sec 16
Owned by State
Fish Passability: Barrier at Most Flows
Total Erosion: 0 tons/year
Overall Score: 28
Severity: Moderate
Date Inventoried: 10/28/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
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: Mixture
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: Smooth
Is Structure Rusted through? Yes
Dimensions of Structure: Length 14 ft. Width 1 ft. Height 1 ft.
Percentage Plugged: 21% - 40% Outlet
Percentage Crushed: 1% - 20%
Structure Inlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.5 ft./sec.
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
Road Information
Road Surface: Sand
Owner: State
Manager: DNR Forest Resources Division
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Fair (some of the symptoms may be present, but not to an extent posing high risk to the crossing)
Road Width at Culvert: 8 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 0.2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 0.2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 0 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0 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: 0 tons/year
Summary Information
Fish Passability: Barrier at Most Flows
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.