Road Stream Crossing Site EUP_MRW12
Munuscong River Watershed, Hannah Creek
E 29 Mile Rd
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.0860172,-84.27589
T 043N R 001 Sec 26
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 0.36 tons/year
Overall Score: 40
Severity: Severe
Date Inventoried: 8/4/2021
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
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: 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 26 ft. Width 5 ft. Height 3 ft.
Percentage Plugged: 21% - 40% Inlet
Percentage Crushed: 61% - 80%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.3 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.1 ft./sec.
*Water Velocities were measured 0.8 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 30 ft., Width 10 ft., Depth 2 ft.
Is Upstream Ponding Present? Yes
Pond: Length 40 ft., Width 20 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 12.5 ft.
Wetted Width: 9.5 ft.
Water Velocity: 1 ft./sec. (measured via Flow Meter)
Dominant Substrate: Gravel – rocks between the size of a pinhead and a baseball
Road Information
Road Surface: Gravel
Owner: County
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: 10 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 3 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 150 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.18 tons/year
Right Approach
Length: 150 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.18 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.36 tons/year
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? Yes, Inlet is very crushed and plugged.
Were any non-native species observerd at this site? No
Site Comments: Old beaver dam
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.