2003-03-31_REVISION - M1977344 ‎(2)‎

• Permit No: M1977344
• IBM Index Class Name: Revision
• Doc Date: 3/31/2003
• Doc Name: Response to Adequacy Review
• From: Holcim
• To: DMG
• Type & Sequence: AM1
• Media Type: D
• Archive: No

Division of Minerals and Geology
March 31, 2003
Page 12 of 17
formation bedding planes/fractures will no longer do so, since the disturbed profile will disrupt
the present subsurface flow system. To the extent that the current lower Bear Creek stream flow
is the result of recharge due to irrigation of agricultural lands north of Highway 50, the disruption
of the limestone bedding planes/fractures that currently feed lower Bear Creek will significantly
reduce the already low base flow in this portion of Bear Creek. The result will be a net increase
of deeper infiltration to and saturation of the lower portions of any remaining unmined limestone
and/or the underlying Codell sandstone in the lower Bear Creek area. Eventually, equilibrium
will be reached, with a net outflow into the Arkansas River alluvium and/or into the underlying
sandstone aquifer.
Item No. 30
DMG: The Office of the State Engineer, Division of Water Resources provided the following
comment regarding the diversion of Bear Creek. "The application has listed that up to 0.25 cfs
of water will be diverted from Bear Creek for the creation of a wetlands. Diversion of water in
over appropriated areas, such as this, requires a plan for augmentation of substitute water supply
plan. " Please contact the Division of Water Resources, Division 2 Office and inguire about the
need for an augmentation plan or substitute water supply plan. If either is needed, provide that
information in this exhibit as well as Exhibit M.
Response:
It is Holcim's understanding that, with the abandonment of the initial plan to create new wetlands
on the north side of the river by diversion of water out of Bear Creek, this is no longer an issue.
Item No. 31
DMG. Your application includes plans to divert Bear Creek. Our engineer has conducted an
initial review of those plans and needs more information to complete his review. Please address
his questions and requests in the following lint.
Response;
As DMG is aware, Holcim is proposing a new alignment for the permanent relocation of the
reach of Bear Creek that crosses the mine area. Please see Figures C-5 through C-9, and the
attached Preliminary Bear Creek Relocation Hydraulic Modeling Study for details. Responses to
the specific issues raised by DMG areas indicated below.
a. The operator should submit a compaction plan of the fill sections and berm segments
of the re-alignment. Also, lift thickness information should be included.
Response:
As indicated by the attached figures, the new design has no fill sections.
b. How does She operator plan to key-ln the layers of material in the fill and berm
areas?
Holcim Response to Amendment Adequacy Review.doc