2015-01-26_PERMIT FILE - C1981012A ‎(5)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 1/26/2015
• Section_Exhibit Name: Section 2.05 Operation and Reclamation Plan
• Media Type: D
• Archive: Yes

23
through 007 -6 all constitute the total drainage area for Pond 007. The operator will
also open the gates on all other sites. A staff gage will be installed on or adjacent to
the riser pipe of Pond 007 identifying the water level (7373.3 ft.) adequate to retain a
10 -year 24 -hour storm without discharging over the emergency spillway. This
elevation was arrived at through a review of the Pond 007 as -built stage volume
curve dated 5/31/85 in Exhibit 19. The crest invert emergency spillway volume is 9.2
acre -feet and the 10 -yr 24 -hr runoff volume is 6.6 acre -feet, resulting in an allowable
permanent storage and sediment volume of 2.6 acre -feet.
The operator has received approval from CDPH &E, Water Quality Control Division
to use a flocculent to settle suspended solids in pond water during emergency
situations of for water discharges associated with pond cleaning activities.
All materials removed through the cleaning or excavation of sediment and/or
treatment ponds will be disposed of at the development wastes pile.
Exploratory holes will be drilled within the permit boundary. Run -off from the
related drill pads may not go through a treatment facility such as a sediment pond.
Run -off from the pads that does not report to a sediment pond will be filtered through
a sediment fence. Design of sediment fences for drill pad configurations are
presented in Exhibit 19(20) pages 1 -17. The typical sediment fence configuration
and berms are shown on Map 25.
Silt fences will be used to treat run -off from exploration holes drilled along the rail
corridor similar to what is shown on Map 25. The rail corridor is considered an
industrial area. Once the rail corridor drill site is re- graded, no ongoing
sedimentation control is required.
Table 20 Ditch Data
Ditch
Number
10 -Year
24 -Hour
Peak
Discharge
Contributing
Drainage
Area (Acres)
Disturbed
(D) or
Undisturbed
(UD)
CN
Depth
(FT)
Top
Width
(FT)
Shape
Ditch
Slope ( %)
Rip- Rap
(In.)
1
10.5
3.9
D
88
1.5
7.5
V
1.5
2
13.38*
4.4
D
85
0.87
10.35
Trap.
5.0
3
3.65*
1.4
D
85
1.0
7.51
V
4.0
4
1.83*
0.76
D
82
0.83
4.2
V
1.8
5
1.75
1.95
D
79
0.88
4.41
V
1.0
6
3.98
2.2
D
89
0.96
3.84
V
3.0
7
40.6
18.9
UD
80
1 2.0
8.0
Trap.
3.2
8
3.12
3.22
D
89
0.82
4.08
V
6.0
9
34.8
15.9
UD
80
2.5
13.8
V
5.9
10
40.46*
71.86
UD
64
1.12
6.7
V
4.6
D10A
0.19
0.14
D
82
0.49
2.43
V
5.0
11
44.4
23.5
UD
80
2.0
8.0
Trap.
2.9
12
8.75*
2.83
fD
94
0.95
4.3
Trap.
1.0
Section 2.05 TR -68 12/10/2014