Pole_Sounding_Data.pdf

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Survey Conducted by: Sheldon Edd, P.E., USACE Date of Survey 5-Aug-15

Upper Pool Elevation: 639.16' (1912 ADJ)

Survey Start Point was on the downstream end of Monolith 12 at the landward edge of concrete.

Depths shown below are depth below water surface elevation

Two soundings were taken per monolith

Depth at edge of concrete (ft)

Additional Depth to firm ground (ft)

Depth 10' landward of edge of concrete (ft)

Additional Depth to firm ground (ft) Notes

Monolith 13 No Reading Monolith 12 2.5 10 12

R1 4.5 1 12 R2 5 3 4.6 11 R3 10 0 11 R4 13.5 0.5 8.3 10 first sounding that Concrete was found with pole R5 15 0 11 1 10.8 10 R6 15.5 0 10 2.5 10.8 9 R7 16 0.5 9.5 3 11 9 R8 16.5 0 8.5 3 10.3 8 R9 16 1 9 1 10 8

R10 16 0 9.5 2 11.4 7 R11 14.5 1 8.5 0.5 8.6 7 R12 14 0 9.5 0 8.7 6 R13 11 0 6.5 0 6.6 6 R14 8 1 6 0 4.8 5 Sounding B felt like pole was on rip rap R15 12 0 7 0.5 7.6 5 R16 14 0 9 1.5 9 4 R17 14 0.5 5.5 0 5 4 R18 10 1 4 0.05 4 3 R19 8 3.5 6 1 5.8 3 R20 11 0.5 5.5 1 5 2 R21 6.5 1 5.5 0.5 4.4 2 R22 7 0 6 0 8.8 1 R23 11 0 10.5 0 11.1 1 R24 16 0 9 0 9.7 1 straight landward from upstream face of UG-1 bullnose

8' Above Bullnose 17 0

Lock and Dam 7 Upper Guidewall Pole Sounding Data

Pole Sounding A Pole Sounding B

Sounding boat target number

Sonar Depth (ft)

Approximate Monolith at sounding set

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GENERAL SURVEY NOTES:

Lock and Dam 7 Upper Guidewall Pole Sounding Data

The above is not intended to be an accurate representation, it is intended only to provide a general idea of the approximate bottom elevation along the landward edge of the guidewall structure and an approximate distance of 10 feet landward of the guidewall structure.

Procedure used to develop the above information:

- Rxx is the target number entered in the sonar sounding data. The pole soundings are approximately 8 feet ahead of the target location on the boat.

- Two sets of pole soundings were taken per monolith, approximately 8 to 10 feet upstream and downstream of a monolith joint.

- The pole used was an approximate 2” diameter aluminum pole with a rounded wood plug in one end. The pole was hand marked with electrician’s tape at one foot intervals. Measurements were taken at whole and half foot only, visually estimated.

- The same staff person performed all pole soundings

- Staff “felt” for edge of concrete and then moved slightly landward. The rounded end of the pole was lowered until it was determined to be setting on top of the bottom, as determined by feel. This is the depth number, depth below water surface. The staff then exerted upper body weight to push the pole into the bottom until significant resistance was obtained, by feel. This was done to give a general indication of how “firm” the bottom is at that particular location. This is the additional depth and is shown as depth below bottom surface.

- Sonar data was measured at target number, approximately 8 feet upstream of pole sounding, approximately 5 feet landward of the guidewall structure.

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