PERMFILE122478

• Permit No: C1992080
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPENDIX 4-2 HYDROLOGY & GEOLOGY
• Media Type: D
• Archive: No

2,04.5
massive-bedded marine sandstone. The Upper Pictured Cliffs Sandstone is
intertongued with the overlying Fruitland Formation, This tongue of the
Fruitland Formation is coal bearing. The Pictured Cliffs Sandstone has
a local undisturbed thickness in excess of 200,
Bedding strikes locally N45oE and dips 15o to 29o SE,
HYDROGEOLOGY
Surface Water•
The area of investigation lies in Carbon Junction Canyon, a tributary
of the Animas River. Carbon Junction Canyon is an intermittant drainage.
The surface of the permit area drains well and drainage from normal precipita-
tion flows into Carbon Junction Canyon and thence southwest into the Animas
River, All drainage is tributary to the Animas P.iver.
Surface water flows over and recharges aquifers of the Fruitland Forma-
tion and the Pictured Cliffs Sandstone.
Ground Water•
Formations exposed in the area of investigation are the Fruitland For-
motion and the Pictured Cliffs Sandstone.
The Fruitland Formation is not considered and adequate aquifer because
of generally poor porosity and permeability. The formation is composed of
irregularly bedded and discontinuous sandstone, shale and coal beds.
The Pictured Cliffs Sandstone is considered a potential aquifer and is
expected to be saturated at elevation 6400 (the piezometric surface of
the Animas River). The aquifer characteristics are as follows: range of
permeability, 0,0-159 millidarcys, average 2.96 millidarcys; range of porosity,
2.8-32,2, average 18.1%; average connate water saturation, 44~.
The Lewis Shale lies below the Pictured Cliffs Sandstone. This formation
(2)