2017-02-21_REVISION - M1988112 ‎(2)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 2/21/2017
• Doc Name: Request for Technical Revision
• From: Battle Mountain Resources, Inc.
• To: DRMS
• Type & Sequence: TR34
• Email Name: WHE
• Media Type: D
• Archive: No

Weir Coefficients at 100 -Year flow
100yr
Upper Weir Elev
ft.
8562.5
Crest Length=
ft.
15
Q total=
cfs
405
Uppwer Weir Q openings=
cfs
123
Q= Qtotal - Q openings
cfs
282
Y (drop height)
ft.
8.5
Weir Coefficient - upper weir
3.33
q (weir)=
cfs
18.8
He (head over Weir)
ft.
3.17
WS above Upstream Weir Elev
ft.
8565.67
Flow Depth above upstream weir with velocity head
ft.
11.67
Approach Velocity Head Estimate
ft.
0.08
Observed WI above weir (w/o V head)
ft.
11.59
hl observed upper weir (w/o velocity head)
ft.
3.09
Tailwater below weir
ft.
7.07
112 (downstream depth above crest)
ft.
-1.43
Weir Submergence (d/H=h2/h1)
-0.463
Submergence Coefficient factor
1.000
Velocity of Approach Above upper Weir
fps
2.33
Adjusted Velocity Head
ft.
0.08
Adjusted Tailwater Observed above upper Weir
ft.
11.59
Lower Weir Q openings
cfs
80
Q total lower weir
cfs
325
Weir Coefficient - lower weir
2.64
hl (include velocity head) lower weir
ft.
4.07
Lower Weir Height
ft.
3.00
TailWater above lower weir with Velocity Head
ft.
7.07
Approach Velocity Head Estimate
ft.
0.23
Tailwater Observed (w/o V head)
ft.
6.85
hl observed lower weir (w/o velocity head)
ft.
3.85
Channel tailwater below weir
ft.
5.22
h2 (downstream depth above crest)
ft.
2.22
Weir Submergence (d/H=h2/h1)
0.577
Submergence Coefficient factor
0.792
Velocity of Approach Above Weir
fps
3.94
Adjusted Velocity Head
ft.
0.24
Adjusted Tailwater Observed above lower Weir
ft.
6.83