Chapter 7 Channel Excavation7 - 1 Chapter 7 Channel Excavation.

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Presentation transcript:

Chapter 7 Channel Excavation7 - 1 Chapter 7 Channel Excavation

7 - 2 Channel Excavation Channel Excavation is calculated by the Average-end Area Method with The plan template applied. Plan template can be found in cross section sheets or in bridge plans. It is an In-place measurement.

Chapter 7 Channel Excavation7 - 3 Example: End Areas Not Included for pay Channel excavation below the grading template Original Ground Line Template Final Pay Area No pay No Pay

Chapter 7 Channel Excavation7 - 4 Field Notes for Channel Excavation Channel Excavation is NOT a plan quantity item. 1.Pre-construction original sections shall always be taken just prior to beginning of excavation. 2.Final sections are always required and must be plotted in conjunction with the template to determine the limits of final pay quantity.

Chapter 7 Channel Excavation7 - 5 Field Notes for Channel Excavation 3.If shoaling occurs after final cross sectioning and prior to final acceptance of the job and the Engineer authorizes the shoaled material to remain in place, re-cross sectioning must be done. The volume of any such material remaining within the limits of channel excavation shown in the plans shall be deducted from the measured quantity of Channel Excavation.

Chapter 7 Channel Excavation7 - 6 Channel Base Line Base line. Stations at 100’ intervals with flags. Crossings greater than one-half mile. Measure your offset to your readings.

Chapter 7 Channel Excavation7 - 7 Documentation Bench. HI. Water Elevation. Offset. Sounding Tidal Waters

Chapter 7 Channel Excavation7 - 8

Chapter 7 Channel Excavation7 - 9 Channel Excavation ANY QUESTIONS ?