NC0038377_Table 6-7 Horizontal Groundwater Gradients and Flow Velocities_20150902

TABLE 6-7
HORIZONTAL GROUNDWATER GRADIENTS AND FLOW VELOCITIES
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ROXBORO, NC
r
Ash Basin Groundwater Gradients
Direction
Data Points
Gradient
(ft per ft)
Velocity
(ft per yr)
Saprolite
NE
MW-12S to ABMW-03S
0.017
1.73
NE
ABMW-03S to MW-16S
0.034
3.83 to 4.80
Transition Zone
NE
MW-12D to ABMW-04D
0.018
4.99 to 8.23
NE
ABMW-04D to MW-16D
0.030
5.43 to 8.95
Bedrock
IL NE
ABMW-04BR to MW-16BR
1 0.030
0.11 to 1.35
Prepared by: RAG Checked by: EMB
Note:
ft = feet
yr = year
Water level measurements used for these calculations were collected on June 17, 2015
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