Road Stream Crossing Site TBW_TBAP223
Thunder Bay River Watershed, North Branch Thunder Bay River
Leer Road
Posen Twp,
Presque Isle County
Information collected by:
Site Location
GPS Coordinates: 45.22112
, -83.7392
T33N
R6E
Sec 29
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 4.1453 tons/year
Severity: Severe
Year Inventoried: 2017
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Rock
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 77 ft.
, Width 30 ft.
, Height 17 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.7 ft.
Water Velocity*: 0.8 ft./sec.
Structure Outlet
Water Depth: 1.4 ft.
Water Velocity*: 0.8 ft./sec.
*Water Velocities were measured 0.9 ft. below Surface
(with Meter)
Additional Comments
OLD MILL UPSTREAM/BEAVER ACTIVITY AT CROSSING
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 100 ft.
, Width 100 ft.
, Depth 8 ft.
Upstream Pond: Length 70 ft.
, Width 100 ft.
, Depth 8 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 61 ft.
Wetted Width: 52 ft.
Water Velocity: 1.9 ft./sec.
(Measured with Meter)
Dominant Substrate: Cobble
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 30 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Partial
LS Factor: 3.15
Erosion: 3.124 tons/year
Right Approach
Length: 594 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.734
Erosion: 1.0213 tons/year
Erosion Information
Total Erosion at Crossing: 4.1453 tons/year
Extent of Erosion: Stabilized
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. MILL BLOCKAGE
These non-native species were observerd at this site: Autumn Olive, Spotted Knapweed, Queen Anne's Lace