Road Stream Crossing Site EUP_MRW19
Munuscong River Watershed, East Branch Munuscong River
E Gogomain River
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.1580205,-84.3455822
T 044N R 001 Sec 31
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 2.21 tons/year
Overall Score: 20
Severity: Moderate
Date Inventoried: 8/5/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Other
Site Sketch
Crossing Information*
Type of Crossing: Bridge
Number of Structures: 1
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Light superficial corrosion or abrasion or chipping or spalling or cracking. No shape changes (described above).
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 36 ft. Width 118 ft. Height 16 ft.
Percentage Plugged: 41% - 60% Outlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.8 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0.3 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 2.5 ft./sec.
*Water Velocities were measured 0.5 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? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1.2 ft.
Bankfull Width: 45 ft.
Wetted Width: 30 ft.
Water Velocity: 0.3 ft./sec. (measured via Flow Meter)
Dominant Substrate: Clay – very fine particles that stick together
Road Information
Road Surface: Paved
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: 34 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 0 ft.
Slope: Vertical, 0:1, or 90°
Downstream
Fill Depth: 0 ft.
Slope: Vertical, 0:1, or 90°
Approaches
Left Approach
Length: 550 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.04 tons/year
Right Approach
Length: 600 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.17 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 2.21 tons/year
Summary Information
Fish Passability: Barrier at Most Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Thistle, birds foot trefoil, queen annes lace, spotted knapweed.
Site Comments: Beaver dam underneath bridge
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.