Draft Environmental Impact Statement for Roca Honda Mine

Chapter 3. Affected Environment and Environmental Consequences
Notes: Diagram shows major aquifers (stippled), confining beds (blank), and directions of groundwater flow (arrows). From Stone et al. (1983). The scales indicate a large
vertical exaggeration in this diagram.
Table 5. Summary of hydrologic characteristics of hydrogeologic units in the San Juan structural basin
Hydrogeologic
Unit
Transmissivity (feet
squared per day)
Range or
Value
Median Number
of tests
Storage
coefficient
Range or
Value
Number
of tests
Hydraulic
conductivity
(feet per
day)
Discharge (gallons per
minute)
Range or
Value
Number
Median
of wells
Specific capacity (gallons
per minute per foot of
drawdown)
Range or
Value
Median Number
of wells
San José aquifer 40–117 100 3 – – – 0.15–61 5 46 0.23 – 2
Nacimiento
aquifer
– – – – – – 2–70 24 14 0.03–0.80 0.24 10
Animas aquifer – – – – – – 2–90 6 39 0.031 – 1
Ojo Alamo
aquifer
57–245
0.05-0.39
140
0.35
9
3 1
– – – 1.2–112 12 19 0.02–2.04
0.01–0.03
Kirtland aquifer 2.4 – 1 0.00001 1 – 1–12 3 12 0.01–0.42 0.03 6
Fruitland aquifer 0.6–130 7 5 – – – 1–12 2.5 8 0.003–0.04 0.02 3
Pictured cliffs
aquifer
Lewis confining
unit
Cliff House
aquifer
Menefee
confining unit
Point Lookout
aquifer
0.001–3 0.01 5 – – 0.007 2 2–73 21 12 0.01–0.70 0.01 7
– – – – – – 2–25 7 13 0.04–2.5 0.67 3
2.1 – 1 – – 0.0015 2 1–40 8.5 27 0.01–0.15 0.06 14
2.7–112 10 9 – – 0.017 2 2–308 10 83 0.02–0.57 0.11 37
0.4–236 56 4 0.000041 1 0.0058 2 1–360 20 22 0.02–1.67 0.25 6
DEIS for Roca Honda Mine, Cibola National Forest 127
0.28
0.02
7
2 1