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:
Huron Pines
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
32.1 ft.
34.5 ft.
6.9 ft.
11.2 ft.
34.5 ft.
7.3 ft.
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
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
Reaching Stream?
Left Downstream
20 ft.
10 ft.
0.5 ft.
Sandy Loam
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