Road Stream Crossing Site EUP_43N5W14_001
Carp River Watershed, Unnamed Tributary to Taylor Creek
Unnamed Rd (FR 3329)
Mackinac County
Information collected by:
USFS
Site Location
GPS Coordinates: 46.1281200000001,-84.8946999999999
T 043NN R 005W Sec 14
Owned by Private
Fish Passability: Barrier
Perch Height: 2 ft.
Total Erosion: 1.18 tons/year
Overall Score: 26
Severity: Severe
Date Inventoried: 6/28/2016
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Not new, but no noticeable corrosion, abrasion, chipping, spalling, or cracking. No shape changes such as barrel distortion (bowing, bending, warping), bulging, inlet or outlet damaged.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 35 ft. Width 3 ft. Height 3 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Perch Height: 2 ft.
Structure Inlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.4 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
Stream Information
Stream Flow: < 1/2 Bankfull – The stream channel is less than half filled with water.
Stream Flow Type: Intermittent (if channel is dry but has obviously flowed recently, appears to flow annually).
Is Scour Pool Present? Yes
Scour Pool: Length 18.5 ft., Width 15.5 ft., Depth 5 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 2.6 ft.
Wetted Width: 2.5 ft.
Water Velocity: 0.33 ft./sec. (measured via Float Test)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Native Surface
Owner: Federal
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 12 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 6.9 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 7.2 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 100 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.13 tons/year
Right Approach
Length: 100 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.13 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.18 tons/year
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Extent of Erosion | Estimated Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | ||
Right Upstream Embankment | 3 ft. | 5 ft. | 2 ft. | Yes | Sand | Moderate (corrective actions recommended) | 0.23 |
Right Downstream Embankment | 3 ft. | 5 ft. | 2 ft. | Yes | Sand | Moderate (corrective actions recommended) | 0.23 |
Left Upstream Embankment | 3 ft. | 5 ft. | 2 ft. | Yes | Sand | Moderate (corrective actions recommended) | 0.23 |
Left Downstream Embankment | 3 ft. | 5 ft. | 2 ft. | Yes | Sand | Moderate (corrective actions recommended) | 0.23 |
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Oxe-eye Daisy.
Site Comments: High perch height and erosion on both upstream and downstream embankments.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.