Road Stream Crossing Site UBR_MB25
Upper Black River Watershed, Gillis Creek
Mack Rd
Forest Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.351061
, -84.302775
T34N
R1E
Sec 10
Owned by Private
Perch Height: 0.2 ft.
Total Erosion: 2.8182 tons/year
Severity: Severe
Year Inventoried: 2014
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Right
Road Approach - Left
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: New
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
1.6 ft. |
29.5 ft. |
1.6 ft. |
Metal |
2 |
1.6 ft. |
29.5 ft. |
1.6 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 29.5 ft.
, Width 1.6 ft.
, Height 1.6 ft.
Perch Height: 0.2 ft.
Structure Inlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
*Water Velocities were measured 0.2 ft. below Surface
(with Meter)
Additional Comments
#1 = main culvert; did not do riffle- stream enters marsh
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 25 ft.
, Width 45 ft.
, Depth 2 ft.
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 16.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 0.5 ft.
Slope: Vertical
Downstream
Fill Depth: 0.5 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.2273 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 2.5909 tons/year
Erosion Information
Total Erosion at Crossing: 2.8182 tons/year
Summary Information
Erosion is an area of concern for this site.
The culverts seem to be a new installation (probably 2014), but the road was pretty torn up when it was put in. It may stabilize on its own, but there is very little embankment with no vegetation at this point.
A future visit to this site is recommended. Check on embankments to see if they've collapsed and/or how much the flow has eroded the road sides. Pretty messy in October, 2014, tore it up quite a bit during installation.