Road Stream Crossing Site CLHW_GCNC-004
Grass Creek-Norwegian Creek Watershed, Grass Creek
North Point Rd
Alpena,
Alpena County
Information collected by:
Site Location
GPS Coordinates: 45.12629
, -83.32953
T32N
R9E
Sec 34
Owned by Private
State
State
Structure is NOT Perched
Total Erosion: 6.291 tons/year
Severity: Severe
Year Inventoried: 2016
Site ID
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: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 40 ft.
, Width 4.5 ft.
, Height 3 ft.
Structure is NOT Perched
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Stream Information
Stream Flow: None
Bankfull Width: 18 ft.
Dominant Substrate: Cobble
Road Information
Gravel
County Road
(Seasonal)
Road Condition: Good
Road Width at Culvert: 20 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.1405 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.1405 tons/year
Erosion Information
Total Erosion at Crossing: 6.291 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Minor erosion occuring on the side of U/S culvert
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Upstream Embankment |
4 ft. |
3 ft. |
2.5 ft. |
no |
Gravel |
0.01 |
Summary Information
These non-native species were observerd at this site: Reed Canary Grass