2019-12-13_REVISION - M1980244 ‎(57)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 12/13/2019
• Doc Name Note: Appendix 3 - 4
• Doc Name: Request For Amendment To Permit
• From: CC&V
• To: DRMS
• Type & Sequence: AM13
• Email Name: TC1
• Email Name: MAC
• Email Name: BFB
• Email Name: ERR
• Email Name: JPL
• Media Type: D
• Archive: No

NewFietds
Newmont
VLF/OSA Closure Study
PHASE 3/SGVLF Stormwater Diversion Channel
Watershed Characteristics and Lag Time Calculation
10.8(S + 1)0.7
tp 1900y0.5
tp Lag Time (hr.)
I Length to Divide (ft)
y Avg. Watershed Slope (%)
CN Composite Curve Number
S 1000/CN-10(in.)
la Initial Abstraction (0.2*S)
Input Values
Lag Time and Watershed Characteristics
Watershed Area (miz) 1(ft) CN Y s tp (hr) tp (min) la (in.)
Largest bench 0.0308 455 71.00 42.0% 4.08 0.03 2.0 0.817
Largest downdrain 0.1378 2,388 1 71.00 1 41.7% 4.08 0.13 7.7 0.817