2009-10-30_PERMIT FILE - C1982056 ‎(8)‎

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 10/30/2009
• Section_Exhibit Name: Exhibit 51 Mine Water Balance Information
• Media Type: D
• Archive: No

Table E51-23
Site 109 Discharge Rate Calculator -Sample Results
for Maintaining Sulfate at or below 250 mg/L in Trout Creek below Middle Creek
Cu Conductivity, Baseline Instream (Site 69)
Qu Flow Rate, Baseline Instream (Site 69)
Ctl Conductivity, Site 109 discharge
CT Conductivity, instream (Site 69)
Qtl Discharge Rate, Site 109
Qtl = (C'u*Qu) " (C+T*Qu)
CT -Ctl
For calculated instream sulfate: sulfate =conductivity * 0.38
`J
~J
Trout Creek Belo Trout Creek Below
Middle Creek Middle Creek
Site 109 Baseline with site 109
Qtl Ce Q~ C„ Q, + Q~ CT
Case Discharge ~ Cond. Disch. ~ Cond. Disch . ~ Cond. ~ Sulfate
cfs I m l umhos/cm cfs I umhos/cm cfs I umhos/cml m /L
Baseline mean flow, 1.36 I 610 I 3100 46.4 I 511 47.8 I 585 I 187
~ ~ ~ I I
Case 1 high load I I I
Baseline low flow, Case 1.36 ~ 610 7 3100 16.5 ~ 549 17.9 ~ 743 ~ 238
1 high load I I I I I
Case 1
Low flow 1997 1.36 610 3100 31.9 611 33.3 713 228
,
high load
High cond. 1997, Case 1 1.36 ~ 610 ~ 3100 58.7 ~ 722 60.1 ~ 776 ~ 248
high load I I I I I
Low Mean Irrigation flow 0.76 342 4000 6.6 1268 7.4 1551 496
('92), Case 1 1999
Hypothetical -Case 1, 0.76 ~ 341 ~ 4000 13.5 ~ 600 14.3 ~ 781 ~ 250
1999 -Flow Required I I I I I
Hypothetical -Case 1, 1.36 610 3100 17.4 600 18.8 781 ~ 250
high load -Flow I I
Hypothetical -Case 1, 1.36 I 610 3100 11.7 511 13.0 I 781 I 250
1999 -Flow Required
Baseline: Flow and TDS from Exhibit 32. TDS converted to conductivity:
Condcuctivity =TDS *0.75
1997 Data: 1997 Annual Hydrologic Report
Hypothetical: Instream sulfate set at 250 mg/Land discharge rate calculated to
to achieve set instream (w/o Site 109) flow rate
TR07-59 Table E51-23 04/02/07