Road Stream Crossing Site AUS_PR045
Au Sable River Watershed, East Branch Pine River
Gehres Rd
Hawes Twp,
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.70879
, -83.43419
T27N
R08E
Sec 26
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 3.9263 tons/year
Severity: Severe
Year Inventoried: 2012
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
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: Gravel
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 36.7 ft.
, Width 2.8 ft.
, Height 2.8 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
There is no riffle. The crossing turns into a swamp with a main channel which was measured for the riffle.
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 20 ft.
, Width 14 ft.
, Depth 3 ft.
Upstream Pond: Length 30 ft.
, Width 34 ft.
, Depth 2.3 ft.
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 1000 ft.
Wetted Width: 10 ft.
Water Velocity: 0.1 ft./sec.
(Measured with Meter)
Dominant Substrate: Organics
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 25 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 0.2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 0.3 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.9256 tons/year
Erosion Information
Total Erosion at Crossing: 3.9263 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Downtream Ditch |
3 ft. |
1 ft. |
0.1 ft. |
no |
Sand |
0.0003 |
Right Upstream Ditch |
3.5 ft. |
2 ft. |
0.1 ft. |
yes |
Sand |
0.0004 |
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Road is next to stream and could wash out into the stream. Also there is a large scour pool and upstream pond.
These non-native species were observerd at this site: Sweet Clover, Spotted Knapweed