Road Stream Crossing Site AUS_CR067
Au Sable River Watershed, South Branch of AuSable
Steckert Bridge Rd
South Branch Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.53218
, -84.58924
T25N
R02W
Sec 29
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 2.1851 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Rock
General Conditions: Good
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
2 |
32.1 ft. |
34.5 ft. |
6.9 ft. |
Wood |
3 |
11.2 ft. |
34.5 ft. |
7.3 ft. |
Wood |
Structure Interior: smooth
Dimensions of Structure: Length 34.5 ft.
, Width 10.6 ft.
, Height 7.7 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.6 ft./sec.
Structure Outlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.4 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 83 ft.
, Width 75 ft.
, Depth 5 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 3.3 ft.
Bankfull Width: 111.5 ft.
Wetted Width: 99 ft.
Water Velocity: 1.9 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 30 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 270 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.532
Erosion: 0.1425 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 2.0331 tons/year
Erosion Information
Total Erosion at Crossing: 2.1851 tons/year
Extent of Erosion: Minor
Notes: From regular access use.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Downstream |
20 ft. |
10 ft. |
0.5 ft. |
yes |
Sandy Loam |
0.0096 |
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.
Yes, fast water, and huge scour pool. Owner was extremely concerned about bank erosion.
A future visit to this site is recommended. To assess scour pool /erosion of bank/ water velocity