02-06 North American Emerald Mine File Pt. 25

MINING CHECKLIST FOR ROUTING
AyyhWd's Name:
Ayyhc./Permit No.: County:
Revfewtr:
❑ New ❑`' Renewal
Project Kiame: '
t
Date Received:
River Basin Name:
C
❑ Modiffcatfou (outside yermft boundaries) ❑
❑ Partial Release ❑_`" Additional It¢mmatfon ❑
Please route entire application aackaae to:
Modtffcattm (Inside yermtt boundaries)
Transfer ❑ Release
Fee Needed: $ ❑ Fee Received: $
(z c lett c us• attach the
Regional Of lice amp oy . neB angf Of fire MfninB nyylication Review
Checklist• to one copy and attach both the DWQ.and DAQ Mi" Ayyl¢catian Review Form^ to the other copy; send both C" to the Rolonal
EVW,er) —
Datc: Routed Reid
❑ Division of water Resources Date: Routed — �— Rec'd
❑ NC Wildl� Resources Commission Date: Routed Recd
❑ US Fish & Wfhlhfe Service Date: Routed Rec'd
(Only new ayyhcatians and modiffcatfan requests that add land to theyaWt)
Please route first s pogo of the application and anv location mans to:
❑
Dfvfsfan of Parks & Recreation
Date:
Ranted
Reed
❑
NC GeoLecal Survey Section
Date:
Routed
ReC'd
❑
Division of Marine Fisheries
Date:
Routed
RCCd
❑
Dtvfsfon of Soft & Water Conservation (phis LEA)
Date:
Routed
ReC'd
(Only new applications and moAiffcdtion requests that add l nd to the
yermit)
❑ Dtvfs[on of Archives & History
(only new applications)
Date: Routed Reed
❑ Other: Date: Routed Reed
*'*SxTense We for Comments: (W later than 25 days from receipt)
❑ Please note tke follMug:

Freeman Environmental Consulting, LLC
31 Cross Street, Suite 229, Spruce Pine, NC 28777
828-765-1515, Office 828-765-3571
e-mail: [e-mail]
June 27,2011
Judith Wehner,
Assistant State Mining Specialist
DENR—Land Quality Section
Division of Land Resources
1612 Mail Service Center
Raleigh, NC 27699-1612
Subject: North American Emerald Mines, Mine Permit Application
Alexander County
North American Emerald Mines
Dear Mrs. Wehner,
JUL G 2011 '
Please find attached, Mine maps, calculations and other item requested in your request letter of May 17,
2010.
To better answer the information request all new maps have been created as a result of a flyover this past
spring. The new maps are more correct than what has been used in the past for the mine and the affected
acres will be different than originally thought. Please find the response to your information request by
number as follows:
1. Mr. Ed Speer is obtaining a corrected copy of page 1 of the application and that will be sent to
your office separately.
2. The new map shows the entire 94.36 which is a change due to the new map the former permit
boundary was 94.6. Spillways and outlets of all sediment traps are shown on the attached drawings.
3. The Basin is shown as is and is at the distance from the stream as shown on the attached map.
Details of the traps and all other control details are also attached.
4. All Sediment control traps have diversions berms and ditches which direct flow to them.
Calculations for all controls new and existing are also attached.
The state road which travels through the mine site has a right of way which is shown on the attached map
and as stated above the maps show the site as is which shows some past mining has occurred inside the
buffer. The area south of the office and process area is an undisturbed grass area where equipment has
been parked in the past and is not included in the attached mine acreages.
Should you have questions or need further information, Nikki Street or I can be contacted at 828-765-
1515 during normal business_rours or at 828-765-3571 (cell) anytime.
Sincerely,
'111004ss(Tom)'Freeman CPESC
Freeman Environmental Consulting, LLC
CC: Ed Speer, NAEM, PG, LCE & FEC files

Mine Permit Application
For
North American Emerald
Mines
►r
rEssio,�e'T,%
SEAL
23960 M .
For
North American Emerald Mine
Alexander County
Plan prepared by:
Landcraft Engineering, PLLC
Firm No. P-0740
Freeman Environmental Consulting, LLC

Table of Contents
1. Affected Acreage (Page 5 of Application)
2. Ditch & Diversion Berm Calculations
3. Culvert & Pipe Calculations
4. Sediment Trap Calculations
5. Construction Details & Specifications'
6. Mine Maps & Plans
4 InINS er?N Daly

APPLICATION FOR A MINING PERMIT
A table/chart must be provided on the mine map that clearly lists the approximate acreage of tailings/sediment
ponds, stockpiles, wastepiles, processing area/haul roads, mine excavation and any other major aspect of the
mining operation that is proposed to be affected/disturbed during the life of the mining permit. A table/chart
similar to the following will be acceptable:
CATEGORY
AFFECTED ACREAGE
Tailings/Sediment Ponds
0.75
Stockpiles
Wastepiles
1.82
Processing Area/Haul Roads
9.33
Mine Excavation
7.41
Other (Undisturbed and Unexcavated
Buffers)
6.43
Total Disturbed Acreage
25.74*
*The above area total does not include any stream buffers and the equipment laydown and
parking area which is infrequently used and not disturbed.
NOTE:
IN ADDITION TO THE ABOVE, THE MAPS MUST ALSO INCLUDE ANY SITE -SPECIFIC
INFORMATION THAT IS PROVIDED IN THE ANSWERS TO THE FOLLOWING QUESTIONS IN
THIS APPLICATION FORM (PLEASE NOTE THE ITALICIZED QUESTIONSISTATEMENTS
THROUGHOUT THE FORM). THIS APPLICATION WILL NOT BE CONSIDERED COMPLETE
WITHOUT ALL RELEVANT ITEMS BEING ADEQUATELY ADDRESSED ON THE MINE MAPS.
-5-

North American Emerald Mine
Ditch Summary
Temporary Bottom Ditch Slope Side
Ditch Lining Liner Width ft/ft Slope Q/cfs Velocity
D-1
Rip Rap
Rip Rap
3
0.13
2:1
4.09
2.68
D-2
Rip Rap
Rip Rap
2
0.07
2:1
0.58
1.24
D-4
Grass
Straw W/net
2
0.038
2:1
0.98
1.23
D-5
Grass
Straw W/net
2
0.05
2:1
1.26
1.51
D-6
Grass
Straw W/net
2
0.03
2:01
0.74
0.93
D-7
Grass
Straw W/net
2
0.023
2:1
1.13
1.2
D-8
Rip Rap
Rip Rap
4
0.084
2:1
7.19
2.63
D-9
Grass
Straw W/net
4
0.44
2:1
4.66
2.52
D-10
Grass
Straw W/net
2
3.037
2:1
0.84
1.1
D-11
Rip Rap
Rip Rap
4
0.048
2:1
5.07
1.94
D-12
Rip Rap
Rip Rap
4.5
0.105
2:1
3.63
2.15
DB-1
Rip Rap
Rip Rap
5
0.029
2:1
18.86
2.39
DB-2
Rip Rap
Rip Rap
4
0.0617
2:1
12.2
2.85
DB-3
Rip Rap
Rip Rap
4
0.02
2:1
15.52
2.03
DB-4
Rip Rap
Rip Rap
4
0.038
2:1
21.56
2.81
DB-5
Grass
Straw W/net
6
0.033
2:1
17.6
3.9
DB-6
Grass
Straw W/net
2
0.08
2:1
1.24
1.75
DB-7
Grass
Straw W/net
3
0.011
2:1
4.18
1.49
DB-8
Grass
Straw W/net
3
0.026
2:1
3.17
1.9
DB-9
Grass
Straw W/net
2
0.019
2:1
1.8
41
1alo
DB-10
Grass
Straw W/net
3
0.035
2:1
2.16
DB-11
Grass
Straw W/net
3
0.027
2:1
1.25

North American Emerald Mine
Runoff Calculations for Ditch
Description
D- 1
Slope 0.13
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
0.698
0.7
0.4886
Concrete, Asphalt & Buildings
0.022
0.95
0.0209
C = 0.5095 (coef) /
HMO MP
0.698 (acres) = 0.7299427
0.698 0.5095
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0,72994 X 7.26 X 0.698 = 3.69897 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.72994 X 5.68 X 0.698 = 2.89396 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.72994 X 8.02 X 0.698 = 4.08619 cfs

North American
Emerald
Project Description
Worksheet
Trapezoidal Channel - D-1
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.104
Slope
0.130000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
4.09 cis
Depth
0.47 ft
Flow Area
1.5 ft2
Wetted Perimeter
4.05 ft
Top Width
3.47 ft
Critical Depth
0.38 ft
Critical Slope
0.264058 ft/ft
Velocity
2.68 ft/s
Velocity Head
0.11 ft
Specific Energy
0.58 ft
Froude Number
0.71
Flow Type
Subcritical
--r
0.47 ft
VJ n
H 2.0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Description
D- 2
Slope 0.07
Acrac (-Valna Cnaf
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
0.103
0.7
0.0721
Concrete, Asphalt & Buildings
0
0.95
0
Totals 0.103 0.0721
C = 0.0721 (coef) / 0.103 (acres) = 0.7
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.7 X 7.26 X 0.103 = 0.523446 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.7 X 5.68 X 0.103 = 0.409528 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.7 X 8.02 X 0.103 = 0.578242 cfs

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-2
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0.070000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.58 cfs
Depth
0.22 ft
Flow Area
0.5 ft2
Wetted Perimeter
2.50 ft
Top Width
2.22 ft
Critical Depth
0.14 ft
Critical Slope
0.342630 ft/ft
Velocity
1.24 ft/s
Velocity Head
0.02 ft
Specific Energy
0.25 ft
Froude Number
0.48
Flow Type
Subcritical
_— ---- "-2 DO n
VA
H2O
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Descrintion
BE
Slope 0.038
Acras ('-VnIna Cnaf
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0.05
0.35
0.0175
Woodlands
0
0.2
0
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0.11
0.95
0.1045
Totals 0.16
C = 0.122 (coef) / 0.16 (acres) = 0.7625
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.7625 X 7.26 X 0.16 = 0.885.72 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.7625 X 5.68 X 0.16 = 0.69296 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.7625 X 8.02 X 0.16 = 0.97844 cfs
0.122

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-4
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.038000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.98 cis
Results
Depth
0.19 ft
Flow Area
0.4 ft2
Wetted Perimeter
2.42 ft
Top Width
2.19 ft
Critical Depth
0.19 ft
Critical Slope
0.036022 ft/ft
Velocity
2.47 ft/s
Velocity Head
0.10 ft
Specific Energy
0.28 ft
Froude Number
1.03
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-4
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.065
Slope
0.038000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.76 cfs
Results
Depth
0.24 ft
Flow Area
0.5 ft'
Wetted Perimeter
2.53 ft
Top Width
2.24 ft
Critical Depth
0.16 ft
Critical Slope
0.128609 ft/ft
Velocity
1.52 ft/s
Velocity Head
0.04 ft
Specific Energy
0.27 ft
Froude Number
0.56
Flow Type
Subcritical
Determine Sheer Stress: T=62.44.244.038= 0.57lb/ft' Permissible sheer stress 1.45lb/ft' - Temporary Lining OK
VR = 1.52x(0.5/2.53) = 0.3
Manning's (curve D fig. 805c) = 0.101

r
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-4
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Salve For
Channel Depth
Input Data
Mannings Coefficient
0.101
Slope
0.038000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.98 cfs
Results
Depth
0.36 ft
Flow Area
0.8 ft2
Wetted Perimeter
2.81 ft
Top Width
2.36 ft
Critical Depth
0.19 ft
Critical Slope
0.299885 ft/ft
Velocity
1.23 ft/s
Velocity Head
0.02 ft
Specific Energy
0.39 ft
Froude Number
0.38
Flow Type
Subcritical
Tall Fescue Permissible velocity = 4.0 ff/s (slopes <5%) Velocity of 1.23 is OK
T
0.36❑
_-_-__- --2.00 n
V:f
H 2.0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Descrintion
D- 5
Slope 0.05
Bare Sandy Soil level
0
0.45 v
v 0
Bare Soil (sloping)
0
0.5
0
Grassland
0.02
0.35
0.007
Woodlands
0
0.2
0
Roadway ravel
0.01
0.7
0.007
Concrete, Asphalt & Buildings
0.15
0.95
0.1425
Totals 0.18
C = 0.1565 (coef) / 0.18 (acres) = 0.8694444
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.86944 X 7.26 X 0.18 = 1.13619 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.86944 X 5.68 X 0.18 = 0.88892 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.86944 X 8.02 X 0.18 = 1.25513 cfs
0.1565

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.035
Slope
0.050000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.26 cis
Results
Depth
0.20 ft
Flow Area
0.4 ft2
Wetted Perimeter
2.45 ft
Top Width
2.20 ft
Critical Depth
0.23 ft
Critical Slope
0.034892 ft/ft
Velocity
2.96 ft/s
Velocity Head
0.14 ft
Specific Energy
0.34 ft
Froude Number
1.18
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.050000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.26 cis
Results
Depth
0.30 ft
Flow Area
0.6 ft2
Wetted Perimeter
2.66 ft
Top Width
2.30 ft
Critical Depth
0.23 ft
Critical Slope
0.120341 ft/ft
Velocity
1.97 ft/s
Velocity Head
0.06 ft
Specific Energy
0.36 ft
Froude Number
0.66
Flow Type
Subcritical
Determine Sheer Stress: T=62.44.304.05= 0.936lb/ft2 Permissible sheer stress 1.451b/ft2 -Temporary Lining OK
VR = 2.02x(0.4/2.46) = 0.44
Manning's (curve D fig. 805c) = 0.097

North American Emerald
Project Description
Worksheet
Trapezoidal Channel- D-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.097
Slope
0,050000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 If
Discharge
1.26 cfs
Results
Depth
0.38 ft
Flow Area
0.8 ft2
Wetted Perimeter
2.85 ft
Top Width
2.38 ft
Critical Depth
0.23 ft
Critical Slope
0.268001 ft/ft
Velocity
1.51 ft/s
Velocity Head
0.04 ft
Specific Energy
0.42 ft
Froude Number
0.45
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 ft/s (slopes <5%) Velocity of 1.51 is OK
-- r
0880
_L
---2.00 0--
V:1 L,
H:2.0
NT5

North American Emerald Mine
Runoff Calculations for Ditch
Description
W .
Slope 0.03
Arrnc f _\/glue t1--47
Bare Sandy Soil level
0 V
v 0.45 v
v 0
Bare Soil (sloping)
0
0.5
0
Grassland
0.05
0.35
0.0175
Woodlands
0
0.2
0
Roadway ravel
0.08
0.7
0.056
Concrete, Asphalt & Buildings
0.02
0.95
0.019
Totals 0.15
C = 0.0925 (coef) / 0.15 (acres) = 0.6166667
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.61667 X 7.26 X 0.15 = 0.67155 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.61667 X 5.68 X 0.15 = 0.5254 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.61667 X 8.02 X 0.15 = 0.74185 cfs
0.0925

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-6
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.030000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.74 cis
Results
Depth
0.17 ft
Flow Area
0.4 ft'
Wetted Perimeter
2.38 ft
Top Width
2.17 ft
Critical Depth
0.16 ft
Critical Slope
0.037430 fUft
Velocity
2.07 ft/s
Velocity Head
0.07 ft
Speck Energy
0.24 ft
Froude Number
0.90
Flow Type
Subcritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-6
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.030000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.74 cis
Results
Depth
0.25 ft
Flow Area
0.5 ft'
Wetted Perimeter
2.56 ft
Top Width
2.25 ft
Critical Depth
0.16 ft
Critical Slope
0.129100 ft/ft
Velocity
1.39 We
Velocity Head
0.03 ft
Specific Energy
0.28 ft
Froude Number
0.50
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.25x0.03=
0.47lb/ft- Permissible sheer stress 1.451b/ft' - Temporary Lining OK
VR = 1.39x(0.512.56) = 0.27
Manning's (curve D fig. 805c) = 0.12

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-6
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.120
Slope
0.030000 ft/ft
Left Side Slope
2:00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.74 cfs
Results
Depth
0.37 ft
Flow Area
0.8 ft2
Wetted Perimeter
2.82 ft
Top Width
2.37 ft
Critical Depth
0.16 ft
Critical Slope
0.439993 ft/ft
Velocity
0.93 ft/s
Velocity Head
0.01 ft
Specific Energy
0.38 ft
Froude Number
0.28
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 ft/s (slopes <5%) Velocity of 0.93 is OK
--r
D 3) ft
_L
I I
2.00 ft
v:t N
H:2.0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Descriotion
D- 7
Slope 0.023
Acrac C_\/ulna r`n.f
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0.07
0.35
0.0245
Woodlands
0
0.2
0
Roadway ravel
0.14
0.7
0.098
Concrete, Asphalt & Buildings
0.02
0.95
0.019
C = 0.1415 (coef) /
I otaIs
0.23 (acres) = 0.6152174
0.23 0.1415
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.61522 X 7.26 X 0.23 = 1.02729 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.61522 X 5.68 X 0.23 = 0.80372 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.61522 X 8.02 X 0.23 = 1.13483 cfs

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-7
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.023000 Wit
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.13 cfs
Results
Depth
0.24 ft
Flow Area
0.5 ft'
Wetted Perimeter
2.54 ft
Top Width
2.24 ft
Critical Depth
0.21 ft
Critical Slope
0.035361 ft/ft
Velocity
2.21 ft/s
Velocity Head
0.08 ft
Specific Energy
0.32 ft
Froude Number
0.82
Flow Type
Subcritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-7
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.023000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.13 cfs
Results
Depth
0.35 ft
Flow Area
0.8 ft'
Wetted Perimeter
2.79 ft
Top Width
2.35 ft
Critical Depth
0.21 ft
Critical Slope
0.121957 Wit
Velocity
1.47 ft/s
Velocity Head
0.03 ft
Specific Energy
0.39 ft
Froude Number
0.45
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.350x0.023=
0.50lb/ft' Permissible sheer stress 1.451b/ft' - Temporary Lining OK
VR = 1.47x(0.8/2.79) = 0.43
Manning's (curve 0 fig. 805c) = 0.088

North American Emerald
Project Description
Worksheet Trapezoidal Channel- D-7
Flow Element Trapezoidal Channel
Method Manning's Formula
Solve For Channel Depth
Input Data
Mannings Coefficient
0.088
Slope
0.023000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 It
Discharge
1.13 cfs
Depth
0.43 ft
Flow Area
0.9 ft2
Wetted Perimeter
2.95 ft
Top Width
2.43 ft
Critical Depth
0.21 ft
Critical Slope
0.223541 Wit
Velocity
1.20 ft/s
Velocity Head
0.02 ft
Specific Energy
0.45 ft
Froude Number
0.34
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 ft/s (slopes <5%) Velocity of 1.20 is OK
T
0.43 It
L
vn `
NTS
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Descriotion
Slope 0.084
Arras C_\/aL is ('naf
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
2.16
0.35
0.756
Woodlands
0
0.2
0
Roadway ravel
0.28
0.7
0.196
Concrete, Asphalt & Buildings
0.04
0.95
0.038
Totals 2A8
C = 0.99 (coef) / 2.48 (acres) = 0.3991935
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.39919 X 7.26 X 2.48 = 7.1874 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.39919 X 5.68 X 2.48 = 5.6232 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.39919 X 8.02 X 2.48 = 7.9398 cfs
O ..

r-
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-8
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.084000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
6.00 ft
Discharge
7.94 cfs
Results
Depth
0.27 ft
Flow Area
1.6 ft'
Wetted Perimeter
6.60 ft
Top Width
6.27 ft
Critical Depth
0.37 ft
Critical Slope
0.027454 ft/ft
Velocity
4.86 ft/s
Velocity Head
0.37 ft
Speck Energy
0.63 ft
Froude Number
1.68
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel- D-8
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.084000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
6.00 ft
Discharge
7.19 cfs
Results
Depth
0.37 If
Flow Area
2.3 ft'
Wetted Perimeter
6.82 ft
Top Width
6.37 ft
Critical Depth
0.35 ft
Critical Slope
0.096196 ft/ft
Velocity
3.18 We
Velocity Head
0.16 ft
Specific Energy
0.52 ft
Froude Number
0.94
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.20x0.08= 0.99lb/ft' Permissible sheer stress 1.451b/ft' - Sheer Stress too High

North American Emerald
Try OD rao Linin
Project Description
Worksheet
Trapezoidal Channel - D-8
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0.084000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
7.19 cfs
Depth
0.63 ft
Flow Area
2.7 ft'
Wetted Perimeter
5.42 ft
Top Width
4.63 ft
Critical Depth
0.46 ft
Critical Slope
0.244263 ft/ft
Velocity
2.63 f /s
Velocity Head
0.11 ft
Specific Energy
0.74 ft
Froude Number
0.60
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.63x0.084= 3.30lb/ft' Permissible sheer stress 4.OIb/ft' - Rip Rap Lining OK
-,_
0.83 fl
_.1
----4.00 ft-
V:1
H 2.0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Description
B
Slope 0.044
Aeroc Onof
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
1.54
0.35
0.539
Woodlands
0
0.2
0
Roadway ravel
0.06
0.7
0.042
Concrete, Asphalt & Buildings
0
0.95
0
C = 0.581 (coef) /
totals 1.6
1.6 (acres) = 0.363125
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.36313 X 7.26 X 1.6 = 4.21806 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.36313 X 5.68 X 1.6 = 3.30008 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.36313 X 8.02 X 1.6 = 4.65962 cfs
0.581

North American Emerald
Project Description
Worksheet
Trapezoidal Channel-D-9
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.044000 Wit
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
4.66 cfs
Results
Depth
0.30 It
Flow Area
1.3 ft'
Wetted Perimeter
4.68 It
Top Width
4.30 It
Critical Depth
0.34 ft
Critical Slope
0.029262 ft/ft
Velocity
3.71 ft/s
Velocity Head
0.21 ft
Specific Energy
0.52 ft
Froude Number
1.21
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel-D-9
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.044000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
4.22 cis
Results
Depth
0.42 ft
Flow Area
1.8 ft2
Wetted Perimeter
4.93 ft
Top Width
4.42 ft
Critical Depth
0.32 ft
Critical Slope
0.102345 ft/ft
Velocity
2.41 ft/s
Velocity Head
0.09 ft
Specific Energy
0.51 ft
Froude Number
0.67
Flow Type
Subcritical
Determine Sheer Stress: T=62.40.424.044= 01.15lb/ft' Permissible sheer stress 1.45lb/ft' - Temporary Lining OK
VR = 2.41x(1.8/4.93) = 0.88
Manning's (curve D fig. 805c) = 0.064

North American Emerald
Description
Worksheet
Trapezoidal Channel -D-9
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.064
Slope
0.044000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
4.66 cfs
Results
Depth
0.44 ft
Flow Area
1.9 ft2
Wetted Perimeter
4.98 ft
Top Width
4.44 ft
Critical Depth
0.34 ft
Critical Slope
0.097840 ft/ft
Velocity
2.52 We
Velocity Head
0.10 ft
Specific Energy
0.54 ft
Froude Number
0.69
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 Ws (slopes <5%) Velocity of 2.52 is OK
n
_..—_-_—_4.00 f1_ -.
v:1I ,
H:2.0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Description
D- 10
Slope 0.037
Arrnc r`r`--47
Bare Sandy Soil level
0
0.45 v
v 0
Bare Soil (sloping)
0
0.5
0
Grassland
0.1
0.35
0.035
Woodlands
0
0.2
0
Roadway ravel
0.1
0.7
0.07
Concrete, Asphalt & Buildings
0
0.95
0
C = 0.105 (coef) /
Totals 0.2
0.2 (acres) = 0.525
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.525 X 7.26 X 0.2 = 0.7623 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.525 X 5.68 X 0.2 = 0.5964 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.525 X 8.02 X 0.2 = 0.8421 cfs
0.105

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-10
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.037000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.84 cfs
Results
Depth
0.17 ft
Flow Area
0.4 ft'
Wetted Perimeter
2.39 ft
Top Width
2.17 ft
Critical Depth
0.17 ft
Critical Slope
0.036768 ft/ft
Velocity
2.32 ft/s
Velocity Head
0.08 ft
Specific Energy
0.26 ft
Froude Number
1.00
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-10
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.037000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.84 cfs
Results
Depth
0.25 ft
Flow Area
0.5 ft'
Wetted Perimeter
2.57 ft
Top Width
2.25 ft
Critical Depth
0.17 ft
Critical Slope
0.126818 ft/ft
Velocity
1.56 ft/s
Velocity Head
0.04 ft
Specific Energy
0.29 ft
Froude Number
0.56
Flow Type
Subcritical
Determine Sheer Stress: T=62.44.254.037=
0.58lb/ft' Permissible sheer stress 1.45lb/ft' - Temporary Lining OK
VR = 1.56x(0.5/2.57) = 0.30
Manning's (curve D fig. 805c) = 0.11

r
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-10
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.110
Slope
0.037000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.84 cfs
Depth
0.35 ft
Flow Area
0.8 ft2
Wetted Perimeter
2.79 ft
Top Width
2.35 ft
Critical Depth
0.17 ft
Critical Slope
0.363192 ft/ft
Velocity
1.10 ft/s
Velocity Head
0.02 ft
Specific Energy
0.37 ft
Froude Number
0.34
Flow Type
Subcritical
Tall Fescue Permissible velocity = 4.0 ft/s (slopes <5%) Velocity of 1.10 is OK
--r
0.35 tt
A.
--_200 II_ _
V:1 f\
H 2.0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
f)Pscrintinn
D- 11
Slope 0.048
Arrae C_\I�hio rnof
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0.5
0.5
0.25
Grassland
0.92
0.35
0.322
Woodlands
0.3
0.2
0.06
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
Totals 1.72
C = 0.632 (coef) / 1.72 (acres) = 0,3674419
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.36744 X 7.26 X 1.72 = 4.58832 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.36744 X 5.68 X 1.72 = 3.58976 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.36744 X 8.02 X 1.72 = 5.06864 cfs
0.632

(-
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-11
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.048000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
5.07 cfs
Depth
0.31 ft
Flow Area
1.3 ft'
Wetted Perimeter
4.69 ft
Top Width
4.31 ft
Critical Depth
0.36 ft
Critical Slope
0.028926 ft/ft
Velocity
3.93 ft/s
Velocity Head
0.24 ft
Specific Energy
0.55 ft
Froude Number
1.27
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-11
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.048000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
5.07 cfs
Results
Depth
0.55 ft
Flow Area
1.8 ft'
Wetted Perimeter
4.22 ft
Top Width
3.55 ft
Critical Depth
0.44 ft
Critical Slope
0.100811 ft/ft
Velocity
2.83 ft/s
Velocity Head
0.12 ft
Specific Energy
0.67 ft
Froude Number
0.70
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.55x0.048= 1.65lb/ft' Permissible sheer stress 1.45lb/ft' - Sheer Stress too High

North American Emerald
Try rip rap Lining
Project Description
Worksheet
Trapezoidal Channel - D-11
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0,048000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
5.07 cfs
Results
Depth
0.61 ft
Flow Area
2.6 ft2
Wetted Perimeter
5.36 ft
Top Width
4.61 ft
Critical Depth
0.36 ft
Critical Slope
0.255395 ft/ft
Velocity
1.94 ft/s
Velocity Head
0.06 ft
Specific Energy
0.67 ft
Froude Number
0.45
Flow Type
Subcritical
Determine Sheer Stress: T=62.4xO.61x0.048= 1.83lb/W Permissible sheer stress 4.Olb/ft2 - Rip Rap Lining OK
-7
0.81 ft
V:1
H:2 0
NTS

North American Emerald Mine
Runoff Calculations for Ditch
Descrintion
D- 12
Slope 0.105
Arr=e C-\/nh ec rn.f
Bare Sandy Soil level
0.1
0.45
0.045
Bare Soil (sloping)
0.35
0.5
0.175
Grassland
0.55
0.35
0.1925
Woodlands
0.2
0.2
0.04
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
C = 0.4525 (coef) /
Totals 1.2
1.2 (acres) = 0.3770833
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.37708 X 7.26 X 1.2 = 3.28515 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.37708 X 5.68 X 1.2 = 2.5702 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.37708 X 8.02 X 1.2 = 3.62905 cfs
0.4525

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-12
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.105000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.50 ft
Discharge
3.63 cfs
Depth
0.19 ft
Flow Area
0.8 ft'
Wetted Perimeter
4.91 ft
Top Width
4.69 ft
Critical Depth
0.27 ft
Critical Slope
0.030523 ft/ft
Velocity
4.27 ft/s
Velocity Head
0.28 ft
Spec Energy
0.47 ft
Froude Number
1.77
Flow Type
Supercritical
Velocity Too High - Lining Required
Try rip rap Lining
Project Description
Worksheet
Trapezoidal Channel - D-12
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0.105000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.50 ft
Discharge
3.63 cfs
Results
Depth
0.36 ft
Flow Area
1.7 ft2
Wetted Perimeter
5.30 ft
Top Width
4.86 ft
Critical Depth
0.27 It
Critical Slope
0.269498 ft/ft
Velocity
2.15 ft/s
Velocity Head
0.07 ft
Specific Energy
0.43 ft
Froude Number
0.65
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.36x0.105= 2.36lb/ft- Permissible sheer stress 4.Olb/ft' - Rip Rap Lining OK

North American Emerald
o. (sn
�-- -- ---a 50 fl--

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 1
Description
Slope 0.029
ArrAc r-\/nhiA rnof
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
3.36
0.7
2.352
Concrete, Asphalt & Buildings
0
0.95
0
C = 2.352 (coef) /
Totals 3.36
3.36 (acre! = 0.7
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.7 X 7.26 X 3.36 = 17.0755 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.7 X 5.68 X 3.36 = 13.3594 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.7 X 8.02 X 3.36 = 18.863 cfs
2.352

North American Emerald
Project Description
Worksheet Trapezoidal Channel - DB-1
Flow Element Trapezoidal Channel
Method
Solve For
Manning's Formula
Channel Depth
Input Data
Mannings Coefficient 0.104
Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
0.029000 ft/ft
2.00 V : H
2.00 V : H
5.00 ft
18.86 cfs
Depth
1.39 ft
Flow Area
7.9 ft2
Wetted Perimeter
8.10 ft
Top Width
6.39 ft
Critical Depth
0.74 ft
Critical Slope
0.216868 ft/ft
Velocity
2.39 ft/s
Velocity Head
0.09 ft
Specific Energy
1.47 ft
Froude Number
0.38
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x1.39x0.029= 2.52lb/ft2 Permissible sheer stress 4.Olb/ft2
f
1 39 it
7
V:t
H:2.0
NTS
Rip Rap Lining OK

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 2
Descrintion
Slope 0.617
Arras C_\/ah is r'n=f
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
2.26
0.7
1.582
Concrete, Asphalt & Buildings
0.018
0.95
0.0171
Totals 2.26 1.5991
C = 1.599 (coef) / 2.26 (acre: = 0.70757
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.70757 X 7.26 X 2.26 = 11.6095 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.70757 X 5.68 X 2.26 = 9.08289 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.70757 X 8.02 X 2.26 = 12.8248 cfs

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-2
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0.061700 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
12.82 cis
Results
Depth
1.00 ft
Flow Area
4.5 ft'
Wetted Perimeter
6.23 ft
Top Width
5.00 ft
Critical Depth
0.66 ft
Critical Slope
0.229822 ft/ft
Velocity
2.85 ft/s
Velocity Head
0.13 ft
Specific Energy
1.13 ft
Froude Number
0.53
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x1.00x0.0617=
3.85lb/ft' Permissible sheer stress 4.Olb/ft' - Rip Rap Lining OK
r
i.00n
1..
4.00 rF__—_.—____
v:r
H2.0
NTS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 3
r).onrinfinn
Slope 0.02
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
2.74
0.7
1.918
Concrete, Asphalt & Buildings
0.018
0.95
0.0171
totals Z.(4 i.y150-!
C = 1.935 (coef) / 2.74 (acre: = 0.70624
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.70624 X 7.26 X 2.74 = 14.0488 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.70624 X 5.68 X 2.74 = 10.9914 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.70624 X 8.02 X 2.74 = 15.5195 cfs

North American Emerald
Project Description
Worksheet Trapezoidal Channel - DB-3
Flow Element Trapezoidal Channel
Method Manning's Formula
Solve For Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0.020000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 ft
Discharge
15.52 cfs
Results
Depth
1.59 ft
Flow Area
7.6 ft2
Wetted Perimeter
7.56 ft
Top Width
5.59 ft
Critical Depth
0.75 ft
Critical Slope
0.226077 ft/ft
Velocity
2.03 ft/s
Velocity Head
0.06 ft
Specific Energy
1.66 ft
Froude Number
0.31
Flow Type
Subcritical
Determine Sheer Stress:
T=62.4x1.00x0.0617= 3.85lb/ft2 Permissible sheer stress 4.Olb/ft' - Rip Rap Lining OK
4.00 ft-...-_
VA
H2D
NTS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 4
nl crrinfinn
Slope 0.038
Acres C-Value Coef.
Bare Sand Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
3.84
0.7
2.688
Concrete, As halt & Buildin s
0
0.95
0
Totals 3.64 2.tit3ti
C = 2.688 (coef) / 3.84 (acre = 0.7
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.7 X 7.26 X 3.84 = 19.5149 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.7 X 5.68 X 3.84 = 15.2678 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.7 X 8.02 X 3.84 = 21.5578 cfs

r
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-4
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.104
Slope
0.038000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
4.00 It
Discharge
21.56 cfs
Results
Depth
1.60 ft
Flow Area
7.7 ft'
Wetted Perimeter
7.58 ft
Top Width
5.60 ft
Critical Depth
0.93 ft
Critical Slope
0.220733 ft/ft
Velocity
2.81 ft/s
Velocity Head
0.12 ft
Specific Energy
1.72 ft
Froude Number
0.42
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x1.60x0.0038= 3.79lb/ft' Permissible sheer stress 4.01b/ft' - Rip Rap Lining OK
1.60 it
VA;_
H 2.0
NTS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 5
n +;
Slope 0.033
Arm— C-Value Coef_
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0.83
0.5
0.415
Grassland
5.1
0.35
1.785
Woodlands
0
0.2
0
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
C = 2.2 (coef) /
i otais o.a.3
5.93 (acre = 0.37099
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.37099 X 7.26 X 5.93 = 15.972 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.37099 X 5.68 X 5:93 = 12.496 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.37099 X 8.02 X 5.93 = 17.644 cfs
L.L

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.033000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
6.00 ft
Discharge
17.64 cfs
Results
Depth
0.58 ft
Flow Area
3.6 ft'
Wetted Perimeter
7.29 ft
Top Width
6.58 ft
Critical Depth
0.63 ft
Critical Slope
0.024513 ft/ft
Velocity
4.85 fUs
Velocity Head
0.37 ft
Specific Energy
0.94 ft
Froude Number
1.15
Flow Type
Supercritical
Velocity too high - Lining Required
Try Jute Lining
Project Description
Worksheet
Trapezoidal Channel - DB-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.028
Slope
0.033000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
6.00 ft
Discharge
12.50 cis
Results
Depth
0.41 ft
Flow Area
2.5 ft2
Wetted Perimeter
6.91 ft
Top Width
6.41 ft
Critical Depth
0.51 ft
Critical Slope
0.016422 ft/ft
Velocity
4.94 f /s
Velocity Head
0.38 ft
Specific Energy
0.79 ft
Froude Number
1.38
Flow Type
Supercritical
Determine Sheer Stress: T=62.44.41 x0.033= 0.721b/ft' Permissible sheer stress 0.45lb/ft' - Sheer Stress too High

North American Emerald
Try Straw w/net temporary linnin
Project Description
Worksheet
Trapezoidal Channel - DB-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.033000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
6.00 ft
Discharge
12.50 cfs
Results
Depth
0.68 ft
Flow Area
4.3 ft2
Wetted Perimeter
7.53 ft
Top Width
6.68 ft
Critical Depth
0.51 ft
Critical Slope
0.088496 ft/ft
Velocity
2.88 ft/s
Velocity Head
0.13 ft
Specific Energy
0.81 ft
Froude Number
0.63
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.68x0.033=
1.401b/ft' Permissible sheer stress 1.451b/ft'
VR = 2.88x (4.3/7.53) = 1.64
Manning's (curve D fig. 805c) = 0.049
Project Description
Worksheet
Trapezoidal Channel - DB-5
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.049
Slope
0.033000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
6.00 ft
Discharge
17.60 cfs
Results
Depth
0.71 ft
Flow Area
4.5 ft'
Wetted Perimeter
7.59 ft
Top Width
6.71 ft
Critical Depth
0.63 It
Critical Slope
0.048060 ft/ft
Velocity
3.90 Ws
Velocity Head
0.24 ft
Specific Energy
0.95 ft
Froude Number
0.84
Flow Type
Subcritical
Tall Fescue Permissible velocity = 4.5 fUs (slopes <5%) Velocity of 3.90 is OK

North American Emerald
s.7f'i tt
soon —

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 6
naccrintinn
Slope 0.08
Bare Sandy Soil level
0
uluV
0.45
VVGI.
0
Bare Soil (sloping)
0.11
0.5
0.055
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadwayravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
i otals U.11
C = 0.055 (coef) / 0.11 (acre: = 0.5
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.5 X 7.26 X 0.11 = 0.3993 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.5 X 5.68 X 0.11 = 0.3124 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.5 X 8.02 X 0.11 = 0.4411 cfs
0.055

i
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-6
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.120000 fUft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.44 cfs
Results
Depth
0.08 ft
Flow Area
0.2 ft2
Wetted Perimeter
2.18 ft
Top Width
2.08 ft
Critical Depth
0.11 It
Critical Slope
0.040534 ft/ft
Velocity
2.64 ft/s
Velocity Head
0.11 ft
Specific Energy
0.19 ft
Froude Number
1.65
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D-6
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.120000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.40 cfs
Depth
0.11 ft
Flow Area
0.2 ft'
Wetted Perimeter
2.25 ft
Top Width
2.11 ft
Critical Depth
0.11 ft
Critical Slope
0.142000 ft/ft
Velocity
1.73 ft/s
Velocity Head
0.05 ft
Specific Energy
0.16 ft
Froude Number
0.93
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.11x0.12=
0.82lb/ft' Permissible sheer stress 1.451b/ft' - Sheer Stress too High
VR = 1.73X(0.2/2.25) = 0.15
Manning's (curve D fig. 805c) = 0.155

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - D-6
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.155
Slope
0.120000 fVft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
0.44 cfs
Results
Depth
0.20 ft
Flow Area
0.4 ft'
Wetted Perimeter
2.45 ft
Top Width
2.20 ft
Critical Depth
0.11 ft
Critical Slope
0.794962 ft/ft
Velocity
1.03 ft/s
Velocity Head
0.02 ft
Specific Energy
0.22 ft
Froude Number
0.41
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 f /s (slopes <5%) Velocity of 1.03 is OK
_oz n
IF-- -_._zoo s-
v:I
H:1.0
NTS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 7
Description
Slope 0.011
Acres (_\/aLio Cnof
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
1.49
0.35
0.5215
Woodlands
0
0.2
0
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
Totals 1.49 0.5215
C = 0.522 (coef) / 1.49 (acre! = 0.35
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.35 X 7.26 X 1.49 = 3.78609 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.35 X 5.68 X 1.49 = 2.96212 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.35 X 8.02 X 1.49 = 4.18243 cfs

1
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB -7
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.011000 fluft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
4.18 cfs
Results
Depth
0.52 ft
Flow Area
1.7 ft2
Wetted Perimeter
4.17 ft
Top Width
3.52 ft
Critical Depth
0.38 ft
Critical Slope
0,029834 tuft
Velocity
2.45 ft/s
Velocity Head
0.09 ft
Specific Energy
0.62 ft
Froude Number
0.62
Flow Type
Subcritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - DB -7
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.011000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
2.96 cfs
Results
Depth
0.62 ft
Flow Area
2.0 ft'
Wetted Perimeter
4.38 ft
Top Width
3.62 ft
Critical Depth
0.31 ft
Critical Slope
0.107220 ft/ft
Velocity
1.44 ft/s
Velocity Head
0.03 ft
Specific Energy
0.65 ft
Froude Number
0.34
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.62x0.011= 0.4261b/ft' Permissible sheer stress 1.45lb/ft' - Temporary Lining OK
VR = 1.44x(2.0/4.38) = 0.66
Manning's (curve D fig. 805c) = 0.073

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB -7
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0,073
Slope
0.011000 ftyft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 It
Discharge
4.18 cfs
Depth
0.82 ft
Flow Area
2.8 ft2
Wetted Perimeter
4.84 ft
Top Width
3.82 ft
Critical Depth
0.38 ft
Critical Slope
0.129787 ftt t
Velocity
1.49 ftis
Velocity Head
0.03 ft
Specific Energy
0.86 ft
Froude Number
0.31
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 f /s (slopes <5%) Velocity of 1.49 is OK
OB2 ft
_._L
3,00 ft
v:t \
H 2.0
N TS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 8
Descriotion
Slope 0.026
Acres r:n=f
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0.34
0.5
0.17
Grassland
0.5
0.35
0.175
Woodlands
0.25
0.2
0.05
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
Totals 1.09
C = 0.395 (coef) / 1.09 (acre: = 0.36239
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.36239 X 7.26 X 1.09 = 2.8677 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.36239 X 5.68 X 1.09 = 2.2436 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.36239 X 8.02 X 1.09 = 3.1679 cfs
0.395

(-.
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-8
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.026000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
3.17 cfs
Results
Depth
0.34 ft
Flow Area
1.1 ft'
Wetted Perimeter
3.75 ft
Top Width
3.34 ft
Critical Depth
0.32 ft
Critical Slope
0.030821 ft/ft
Velocity
2.96 ft/s
Velocity Head
0.14 ft
Specific Energy
0.47 ft
Froude Number
0.92
Flow Type
Subcritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - DB-8
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0,026000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
2.87 cfs
Results
Depth
0.47 ft
Flow Area
1.5 ft'
Wetted Perimeter
4.04 ft
Top Width
3.47 ft
Critical Depth
0.30 ft
Critical Slope
0.107648 ft/ft
Velocity
1.91 ft/s
Velocity Head
0.06 ft
Specific Energy
0.52 ft
Froude Number
0.51
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.47x0.026= 0.76lb/ft2 Permissible sheer stress 1.45lb/ft' - Sheer Stress too High
VR = 1.91x(1.5/4.04) = 0.71
Manning's (curve D fig. 805c) = 0.069

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-8
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.069
Slope
0.026000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
3.17 cfs
Results
Depth
0.51 ft
Flow Area
1.7 ft2
Wetted Perimeter
4.15 ft
Top Width
3.51 ft
Critical Depth
0.32 ft
Critical Slope
0.119788 ft/ft
Velocity
1.90 ft/s
Velocity Head
0.06 ft
Specific Energy
0.57 ft
Froude Number
0.48
Flow Type
Subcdtical
Tall Fescue Permissible velocity
= 4.0 ft/s (slopes <5%) Velocity of 1.90 is OK
_.r
0.51 H
�- -- --- - 3.00 rt -�
v:t j\
H:2.0
NTS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 9
Description
Slope 0.019
Arras C-\/alua r'naf
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0.539
0.35
0.1887
Woodlands
0
0.2
0
Roadway ravel
0.051
0.7
0.0357
Concrete, Asphalt & Buildings
0
0.95
0
Totals 0.59 0.2244
C = 0.224 (coef) / 0.59 (acre = 0.38025
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.38025 X 7.26 X 0.59 = 1.62878 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.38025 X 5.68 X 0.59 = 1.27431 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.38025 X 8.02 X 0.59 = 1.79929 cfs

C
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-9
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.035
Slope
0.019000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.80 cfs
Results
Depth
0.34 ft
Flow Area
0.7 ft'
Wetted Perimeter
2.76 ft
Top Width
2.34 ft
Critical Depth
0.29 ft
Critical Slope
0.033534 ft/ft
Velocity
2.43 ft/s
Velocity Head
0.09 ft
Specific Energy
0.43 ft
Froude Number
0.76
Flow Type
Subcritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - DB-9
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.065
Slope
0.019000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.63 cfs
Results
Depth
0.47 ft
Flow Area
1.1 ft'
Wetted Perimeter
3.05 ft
Top Width
2.47 ft
Critical Depth
0.27 ft
Critical Slope
0.116868 ft/ft
Velocity
1.55 ft/s
Velocity Head
0.04 ft
Speck Energy
0.51 ft
Froude Number
0.42
Flow Type
Subcritical
Determine Sheer Stress: T=62.4x0.47x0.019= 0.557lb/ft' Permissible sheer stress 1.45lb/ft' - Temporary Liner OK
VR = 1.55 x (1.1/3.05) = 0.56
Manning's (curve D fig. 805c) = 0.078

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-9
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.078
Slope
0.019000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
2.00 ft
Discharge
1.80 ofs
Results
Depth
0.56 ft
Flow Area
1.3 ft2
Wetted Perimeter
3.25 ft
Top Width
2.56 ft
Critical Depth
0.29 ft
Critical Slope
0.166546 ft/ft
Velocity
1.41 ft/s
Velocity Head
0.03 ft
Specific Energy
0.59 ft
Froude Number
0.35
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 ft/s (slopes <5%) Velocity of 1.41 is OK
�\ 0.56 it
V:tN-
H :2.0
NTS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 10
Descrintion
Slope 0.035
Ar`rPB R_\/ Inc Cn=f
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0.3
0.5
0.15
Grassland
0.34
0.35
0.119
Woodlands
0
0.2
0
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
C = 0.269 (coef) /
Totals 0.64
0.64 (acre = 0.42031
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.42031 X 7.26 X 0.64 = 1.95294 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.42031 X 5.68 X 0.64 = 1.52792 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.42031 X 8.02 X 0.64 = 2.15738 cfs
0.269

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-10
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.035
Slope
0.035000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
2.16 cfs
Results
Depth
0.24 ft
Flow Area
0.8 ft'
Wetted Perimeter
3.54 ft
Top Width
3.24 ft
Critical Depth
0.25 ft
Critical Slope
0.032432 ftt t
Velocity
2.84 ft/s
Velocity Head
0.13 ft
Specific Energy
0.37 it
Froude Number
1.04
Flow Type
Supercritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - DB-10
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.035000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
1.95 cfs
Results
Depth
0.33 ft
Flow Area
1.1 ft'
Wetted Perimeter
3.75 ft
Top Width
3.33 ft
Critical Depth
0.23 ft
Critical Slope
0.113505 ft/ft
Velocity
1.84 ft/s
Velocity Head
0.05 ft
Specific Energy
0.39 ft
Froude Number
0.58
Flow Type
Subcritical
Determine Sheer Stress: T=62.44.334.035= 0.721b/ft- Permissible sheer stress 1.45lb/ft- - Sheer Stress too High
VR = 1.84x(1.1/3.75) = 0.54
Manning's (curve D fig. 805c) = 0.078

r
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-10
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.078
Slope
0.035000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
2.16 cfs
Results
Depth
0.40 ft
Flow Area
1.3 ft2
Wetted Perimeter
3.89 ft
Top Width
3.40 ft
Critical Depth
0.25 ft
Critical Slope
0.161073 ft/ft
Velocity
1.69 ft/s
Velocity Head
0.04 ft
Specific Energy
0.44 ft
Froude Number
0.49
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 ft/s (slopes <5%) Velocity of 1.69 is OK
o: n
-3.00 H.__
v:1,
H:2.0
N TS

North American Emerald Mine
Runoff Calculations for Diversion Berm DB- 11
Descrintion
Slope 0.027
Bare Sandy Soil level
0
0.45 v
v 0
Bare Soil (sloping)
0.2
0.5
0.1
Grassland
0.16
0.35
0.056
Woodlands
0
0.2
0
Roadway ravel
0
0.7
0
Concrete, Asphalt & Buildings
0
0.95
0
C = 0.156 (coef) /
Totals 0.36
0.36 (acre: = 0.43333
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.43333 X 7.26 X 0.36 = 1.13256 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.43333 X 5.68 X 0.36 = 0.88608 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.43333 X 8.02 X 0.36 = 1.25112 cfs
0.156

C
North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-11
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Mannings Coefficient
0.035
Slope
0.027000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
1.25 cfs
Depth
0.19 ft
Flow Area
0.6 ft'
Wetted Perimeter
3.42 ft
Top Width
3.19 ft
Critical Depth
0.17 ft
Critical Slope
0.035235 ft/ft
Velocity
2.14 ft/s
Velocity Head
0.07 ft
Specific Energy
0.26 ft
Froude Number
0.88
Flow Type
Subcritical
Velocity Too High - Lining Required
Try straw w/net temporary Lining
Project Description
Worksheet
Trapezoidal Channel - D13-11
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.065
Slope
0.027000 fl
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
1.13 cfs
Results
Depth
0.26 ft
Flow Area
0.8 ft2
Wetted Perimeter
3.58 ft
Top Width
3.26 ft
Critical Depth
0.16 ft
Critical Slope
0.123540 ft/ft
Velocity
1.40 ft/s
Velocity Head
0.03 ft
Specific Energy
0.29 ft
Froude Number
0.49
Flow Type
Subcritical
Determine Sheer Stress: T=62.40.264.027= 0.0.438lb/ft2 Permissible sheer stress 1.45lb/ft' - Sheer Stress too High
VR = 1.40x(0.8/3.58) = 0.0.31
Manning's (curve D fig. 805c) = 0.101

North American Emerald
Project Description
Worksheet
Trapezoidal Channel - DB-11
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.101
Slope
0.027000 ft/ft
Left Side Slope
2.00 V : H
Right Side Slope
2.00 V : H
Bottom Width
3.00 ft
Discharge
1.25 cfs
Results
Depth
0.36 ft
Flow Area
1.1 ft3
Wetted Perimeter
3.81 ft
Top Width
3.36 ft
Critical Depth
0.17 ft
Critical Slope
0.293417 ft/ft
Velocity
1.09 ft/s
Velocity Head
0.02 ft
Specific Energy
0.38 ft
Froude Number
0.33
Flow Type
Subcritical
Tall Fescue Permissible velocity
= 4.0 We (slopes <5%) Velocity of 1.09 is OK
04 «
r _._-_3.00 fl__
V:1�
H:2.0
NTS

North American Emerald Mine
Culvert Summary
Diameter Q2S / cfs
Culvert inches Culvert Sizing
C-1
15
1.87
C-2
18
3.24
C-3
18
4.66
Slope Drain
SD-1
30
18.86
SD-2
24
12.82
SD-3
30
18.98
SD-4
30
15.52

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0

North American Emerald Mine
Runoff Calculations for Culvert
Descrintion
C- 1
Bare Sandy Soil level
0
0.45
v 0
Bare Soil (sloping)
0
0.5
0
Grassland
0.12
0.35
0.042
Woodlands
0
0.2
0
Roadway ravel
0.22
0.7
0.154
Paved areas, Roofs & Other
0.04
0.95
0.038
I otals 0.38
C = 0.234 (coef) / 0.38 (acres) = 0.6157895
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.61579 X 7.26 X 0.38 = 1.69884 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.61579 X 5.68 X 0.38 = 1.32912 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.61579 X 8.02 X 0.38 = 1.87668 cfs
0.234

r
North American Emerald Mine
Project Description
Worksheet Circular Channel - C-1
Flow Element Circular Channel
Method
Solve For
Manning's Formula
Channel Depth
Input Data
Mannings Coefficient 0.024
Slope 0.010000 ft/ft
Diameter 15 in
Discharge 1.87 cfs
Depth
0.65 ft
Flow Area
0.6 ft'
Wetted Perimeter
2.01 ft
Top Width
1.25 ft
Critical Depth
0.54 ft
Percent Full
52.0 %
Critical Slope
0.018569 ft/ft
Velocity
2.90 ft/s
Velocity Head
0.13 ft
Specific Energy
0.78 ft
Froude Number
0.71
Maximum Discharge
3.76 cfs
Discharge Full
3.50 cfs
Slope Full
0.002856 ft/ft
Flow Type
Subcritical
I
I
15 in
I
_.j_
V:1
H:1
NTS

North American Emerald Mine
Runoff Calculations for Culvert
Descriotion
C- 2
Acres C-Value Coef
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0.25
0.35
0.0875
Woodlands
0
0.2
0
Roadway ravel
0.1
0.7
0.07
Paved areas, Roofs & Other
0.26
0.95
0.247
Totals 0.61
C = 0.4045 (coef) / 0.61 (acres) = 0.6631148
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.66311 X 7.26 X 0.61 = 2.93667 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.66311 X 5.68 X 0.61 = 2.29756 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.66311 X 8.02 X 0.61 = 3.24409 cfs
0.4045

North American Emerald Mine
Project Description
Worksheet
Circular Channel - C-2
Flow Element
Circular Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.024
Slope
0.010000 ft/ft
Diameter
18 in
Discharge
3.24 cfs
Depth
0.81 ft
Flow Area
1.0 ft'
Wetted Perimeter
2.48 ft
Top Width
1.50 ft
Critical Depth
0.69 ft
Percent Full
54.1 %
Critical Slope
0.017686 ft/ft
Velocity
3.32 fUs
Velocity Head
0.17 ft
Specific Energy
0.98 ft
Froude Number
0.73
Maximum Discharge
6.12 cfs
Discharge Full
5.69 cfs
Slope Full
0,003243 ft/ft
Flow Type
Subcritical
VA N
H'1
NTS

North American Emerald Mine
Runoff Calculations for Culvert
Description
C- 3
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
1.54
0.35
0.539
Woodlands
0
0.2
0
Roadway ravel
0.06
0.7
0.042
Paved areas, Roofs & Other
0
0.95
0
C = 0.581 (coef) /
Totals 1.6
1.6 (acres) = 0.363125
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.36313 X 7.26 X 1.6 = 4.21806 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.36313 X 5.68 X 1.6 = 3.30008 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.36313 X 8.02 X 1.6 = 4.65962 cfs

f
North American Emerald Mine
Project Description
Worksheet
Circular Channel - C-3
Flow Element
Circular Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.024
Slope
0.010000 ft/ft
Diameter
18 in
Discharge
4.66 cfs
Results
Depth
1.03 ft
Flow Area
1.3 ft'
Wetted Perimeter
2.94 ft
Top Width
1.39 ft
Critical Depth
0.83 It
Percent Full
68.8 %
Critical Slope
0.019227 ft/ft
Velocity
3.59 ft/s
Velocity Head
0.20 ft
Specific Energy
1.23 ft
Froude Number
0.66
Maximum Discharge
6.12 cfs
Discharge Full
5.69 cfs
Slope Full
0.006708 ft/ft
Flow Type
Subcritical
r
tB In
1 .OS It I
I I
VA n
H:t
NTS

North American Emerald Mine
Runoff Calculations for Culvert SD 1
DPsrrintion
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
3.36
0.7
2.352
0
0.95
0
Totals 3.36 2.352
C = 2.352 (coef) / 3.36 (acres) = 0.7
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.7 X 7.26 X 3.36 = 17.07552 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.7 X 5.68 X 3.36 = 13.35936 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.7 X 8.02 X 3.36 = 18.86304 cfs

r
North American Emerald Mine
Project Description
Worksheet
Circular Channel - SD-1
Flow Element
Circular Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.024
Slope
0.010000 ft/ft
Diameter
30 in
Discharge
18.86 cis
Depth
1.77 it
Flow Area
3.7 ft'
Wetted Perimeter
5.00 it
Top Width
2.27 it
Critical Depth
1.47 it
Percent Full
70.8 %
Critical Slope
0.016911 ftfft
Velocity
5.08 ft/s
Velocity Head
0.40 ft
Specific Energy
2.17 it
Froude Number
0.70
Maximum Discharge
23.90 ds
Discharge Full
22.22 cis
Slope Full
0.007207 ftfft
Flow Type
Subcritical
V:1, 1
Ha
NT6

North American Emerald Mine
Runoff Calculations for Culvert
Description
SD 2
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
2.26
0.7
1.582
0.018
0.95
0.0171
Totals 2.26
C = 1.5991 (coef) / 2.26 (acres) = 0.7075664
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.70757 X 7.26 X 2.26 = 11.609466 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.70757 X 5.68 X 2.26 = 9.082888 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.70757 X 8.02 X 2.26 = 12.824782 cfs
1.5991

North American Emerald Mine
Project Description
Worksheet Circular Channel - SD-2
Flow Element Circular Channel
Method
Solve For
Manning's Formula
Channel Depth
Input Data
Mannings Coefficient
0.024
Slope
0.010000 ft/ft
Diameter
24 in
Discharge
12.82 cfs
Depth
1.74 it
Flow Area
2.9 ft'
Wetted Perimeter
4.80 ft
Top Width
1.35 ft
Critical Depth
1.29 ft
Percent Full
86.9 %
Critical Slope
0.019639 ft/ft
Velocity
4.42 ft/s
Velocity Head
0.30 ft
Specific Energy
2.04 ft
Froude Number
0.53
Maximum Discharge
13.18 cfs
Discharge Full
12.25 cfs
Slope Full
0.010947 ft/ft
Flow Type
Subcritical
v.i H1
N
NTS

North American Emerald Mine
Runoff Calculations for Culvert SD 3
f)Psrrintion
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
3.38
0.7
2.366
0
0.95
0
Totals 3.38 2.366
C = 2.366 (coef) 1 3.38 (acres) = 0.7
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.7 X 7.26 X 3.38 = 17.17716 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.7 X 5.68 X 3.38 = 13.43888 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.7 X 8.02 X 3.38 = 18.97532 cfs

North American Emerald Mine
Project Description
Worksheet
Circular Channel - SD-3
Flow Element
Circular Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient 0.024
Slope 0.010000 ft/ft
Diameter 30 in
Discharge 18.98 cfs
Depth
1.78 ft
Flow Area
3.7 ft2
Wetted Perimeter
5.02 ft
Top Width
2.27 ft
Critical Depth
1.48 ft
Percent Full
71.1 %
Critical Slope
0.016953 ft/ft
Velocity
5.08 ft/s
Velocity Head
0.40 ft
Specific Energy
2.18 ft
Froude Number
0.70
Maximum Discharge
23.90 cfs
Discharge Full
22.22 cfs
Slope Full
0.007299 ft/ft
Flow Type
Subcritical
V:1
N:1
NTS

North American Emerald Mine
Runoff Calculations for Culvert
npa rrintinn
SD 4
Acres C-Value Coef.
Bare Sandy Soil level
0
0.45
0
Bare Soil (sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway ravel
2.74
0.7
1.918
0.018
0.95
0.0171
I otals 2. /4
C = 1.9351 (coef) J 2.74 (acres) = 0.7062409
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.70624 X 7.26 X 2.74 = 14.048826 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.70624 X 5.68 X 2.74 = 10.991368 cfs
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.70624 X 8.02 X 2.74 = 15,519502 cfs
NWx142i

r
North American Emerald Mine
Proiect Description
Worksheet
Circular Channel - SD-4
Flaw Element
Circular Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.024
Slope
0.010000 tuft
Diameter
30 in
Discharge
15.52 cfs
Results
Depth
1.54 ft
Flow Area
3.2 ft'
Wetted Perimeter
4.51 It
Top Width
2.43 It
Critical Depth
1.33 ft
Percent Full
61.6 %
Critical Slope
0.015869 Wit
Velocity
4.89 ft/s
Velocity Head
0.37 ft
Specific Energy
1.91 ft
Froude Number
0.76
Maximum Discharge
23.90 cfs
Discharge Full
22.22 cfs
Slope Full
0.004880 ft/ft
Flow Type
Subcritical
30�in
15411
I
V:i1\
H1
NTS