Road Stream Crossing Site AUS_CR072
Au Sable River Watershed, Thayer Creek
Chase Bridge Rd
South Branch Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.56083
, -84.55042
T25N
R02W
Sec 16
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 1.0552 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Gravel
General Conditions: Poor
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 46.5 ft.
, Width 1.6 ft.
, Height 1.4 ft.
Percentage Plugged:
Inlet: 76% to 100%
Outlet: 0%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.18 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.42 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 4.5 ft.
Wetted Width: 3 ft.
Water Velocity: 0.08 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Poor
Road Width at Culvert: 28 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.5276 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.5276 tons/year
Erosion Information
Total Erosion at Crossing: 1.0552 tons/year
Extent of Erosion: Minor
Notes: Some erosion due to roadway traffic.
Summary Information
Fish Passability 0.9
Fish Passage is an area of concern for this site.
Yes!! Both sides of culvert rusted through/severely damaged and plugged.
A future visit to this site is recommended. To fix rusted through/damaged culverts. Pose a problem for fish passage and horribly plugged.
These non-native species were observerd at this site: Spotted Knapweed