Road Stream Crossing Site E32

Maple River Watershed, West Branch Maple River
Hartman Rd
Emmet County
Information collected by:
Site Location
GPS Coordinates: 45.54016 , -84.78393
T36N R4W Sec 3
Owned by Private
Structure is NOT Perched
Total Erosion: 0.2397 tons/year
Severity: Severe
Year Inventoried: 2014
Inlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Poor
Structure Interior: smooth
Dimensions of Structure: Length 10 ft. , Width 30 ft. , Height 7 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.4 ft./sec.
Structure Outlet
Water Depth: 3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.5 ft./sec.
*Water Velocities were measured 0.3 ft. below Surface (with Meter)
Additional Comments

Abandon bridge.

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: 2 ft.
Bankfull Width: 23 ft.
Wetted Width: 20 ft.
Water Velocity: 2.4 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Sand Other Road (Seasonal)
Road Condition: Poor
Road Width at Culvert: 10 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 200 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.43
Erosion: 0.2369 tons/year
Right Approach
Length: 20 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0028 tons/year
Erosion Information
Total Erosion at Crossing: 0.2397 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.

Yes, structure should be removed in near future.

A future visit to this site is recommended.

Yes, structure is crumbling into river.

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