GENERAL33297

• Permit No: M1983194
• IBM Index Class Name: General Documents
• Doc Name: COVER SHEET 3 TEXT CHANGES TO DRAFT EIS
• Media Type: D
• Archive: No

3. TEXT CHANGES
Page 4-3
(11)
Column 1, paragraph 5, sentence I: "...however, there
will a potential ...:' should read: "...however, there
will be a potential ... "
Page 4-5
(11)
Column 1, paragraph 3, sentence 6: "The rock quality
of the majority of the stratigraphic ...surface to the
Mahogany Zone ...:' should read: "The rock quality
of the stratigraphic ...surface to the middle Mahogany
Zone...."
(11, A)
Column 1, paragraph 3, sentence 7: "Both caving because
of ...the overlying strata." should read: "Caving because
of ...the strata direcgy overlying the cavities."
(11)
Column 2, paragraph 1, sentence 2: "...would also
increase." should read: "...would also increase, until the
critical width (approximately 1,(x10 feet) is reached. The
critical width is the least width of the mined area at which
point the fuB load oo the pillars would be felt This would
involve approximately 44 cavities, or 4 years of production
under the Proposed Action."
(11)
Column 2, paragraph 2, sentence 2: "...some cnuhing
(failure) at the tops . ~ .:'should read: "...some crushing
(squeezing) at the tops ...:'
(11, A)
Column 2, paragraph 2, sentence 7: "...the cavities
up into the leached zone." should read: "...the cavities,
extending into the leached zone."
Page 48
(11)
Column 1, pazagraph 4, sentence 8: "Sodium resources
within the L-SE Bed could ... :' should read: "Sodium
resources within the affected area of the LrSE Bed could
Page 48 through 4-13
(6 thru 14, A)
Section 4.4, Water Resources has been reprinted.
4.4 WATER RESOURCES
4.4.1 Surface Wafer Quantity
The consumptive use of water under the Proposed Action
or project alternatives would affect the quantity of water
available in Yellow Creek and Piceance Creek for other
uses. Water would be used for production, processing,
domestic purposes, and for the idling of the mine cavities
after mining has been completed. The cavities (void spaces)
left by removal of the sodium would contain briney water.
Project water would be supplied from an upper aquifer
well located in Township 1 South, Range 98 West, Section
24, NEl/4NE1/4. The company currently has conditional
water rights for 2,235 gallons per minute from this well.
This well would be pumped at a maximum rate of 300
gpm, which is sufTcient to supply water requirements for
all alternatives except the 500,000 TPY Alternative.
Additional water needs, required by this alternative, would
have to be supplied from ayet-to-be-identified source. WRC
has conditional water rights for ao additional 15,645 gallons
per minute from other wells in the area. The total water
usage would vary by alternative (Table 43).
Wright Water Engineers (1985) conducted hydrauhc
simulations to determine surface water impacts associated
with the pumping of the single water supply well in Section
24 (Table 43). The pump rates would not cause any
measurable reduction of Bow in Yellow or Piceance Creek
under the No Action Alternative, but would cause a
reduction of average daily flow in Yellow Creek of 2 percent
(.04 cfs) for the 50,000 TPY Alternative, 3.2 percent (.06
cis) for the Proposed Action (125,000 TPY), and 15.3
percent (.29 cis) for the 500,000 TPY Alternative (Table
43). Piceance Creek would be depleted by .l percent (.04
cis) for the 50,000 TPY Alternative, .3 percent (.10 cis)
3-14