11523 Mine Mod 2022 Calculations Set r1 signed

DESIGN CALCULATIONS
FOR
2022 MINE PERMIT MODIFICATION
CLEAR CREEK QUARRY
VULCAN CONSTRUCTION MATERIALS, LP
MECKLENBURG COUNTY, NC
PROJECT NO. 11523
December 17, 2021
February 255 2022 Rl
alley, Williams, carmen, &king, inc.
CONSULTING ENGINEERS
FIRM LICENSE No. F-0203
120 SOUTH MAIN STREET P. O. BOX 1248
KANNAPOLIS, NC 28082 704/938-1515
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10/14/21, 1:00 PM Precipitation Frequency Data Server
NOAA Atlas 14, Volume 2, Version 3
Location name: Charlotte, North Carolina, USA* '�
Latitude: 35.2372°, Longitude:-80.6191°
Elevation: 700.68 ft**
source: ESRI Maps W'd
** source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, I Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Average recurrence interval (years)
Duration ������1 100
1 2 5 10 25 50 100 200 500 1000
4.87 5.75 6.68 7.36 8.11 8.64 9.11 9.52 9.97 10.3
5-min
(4.49-5.28) fl (5.30-6.25) 1 (6.16-7.27) 1 (6.76-7.98) 1 (7.42-8.78) 1 (7.86-9.35) 1 (8.24-9.85) 1 (8.57-10.3) 1 (8.90-10.8) 11 (9.11-11.2)
10-min 3.89 4.60 5.36 5.89 6.47 6.88 7.24 7.54 7.89 8.10
(3.59-4.22) (4.24-5.00) 1 (4.93-5.82) 1 (5.40-6.38) 1 (5.92-7.00) 1 (6.26-7.44) 1 (6.55-7.83) 1 (6.80-8.17) 1 (7.04-8.56) 1 (7.18-8.80)
3.24 3.86 4.52 4.96 5.46 5.80 6.10 6.35 6.62 6.78
15-min
(2.99-3.52) (3.55-4.19) 1 (4.16-4.91) (4.56-5.38) 1 (5.00-5.92) (5.28-6.28) 1 (5.52-6.60) 11 (5.72-6.87) 1 (5.91-7.18) 11 (6.00-7.36)
2.22 2.66 3.21 3.60 4.05 F 4.67 4.94 5.27 5.49
30-min
(2.05-2.41) 11 (2.45-2.89) 1 (2.95-3.49) 1 (3.30-3.90) 1 (3.70-4.38) 1 (4.23-5.05) 1 (4.45-5.35) 1 (4.70-5.71) 1 (4.86-5.96)
60-min 1.38 1.67 2.06 2.34 2.70 2.96 3.22 3.46 3.78 4.01 (1.28-1.50) 1 (1.54-1.82) 1 (1.89-2.24) 1 (2.15-2.54) 1 (2.46-2.92) 11 (2.70-3.21) 11 (2.91-3.48) 11 (3.12-3.75) (3.37-4.10) 11 (3.55-4.35)
0.802 0.971 1.21 1.38 1.61 1.78 1.95 2.12 2.34 2.50
2-hr
(0.736-0.877) (0.890-1.06) 1 (1.10-1.32) 1 (1.26-1.51) 1 (1.46-1.75) 1 (1.75-2.13) 11 (1.89-2.31) (2.07-2.55) (2.19-2.74)
0.570 0.688 0.859 0.991 1.17 1.31 1.45 1.59 1.78 1.93
3-hr
(0.523-0.625) ( 0.632-0.756) ( 0.787-0.942) (0.904-1.08) (1.06-1.27) (1.18-1.42 (1.30-1.57) 1 (1.41-1.73) 1 (1.56-1.94 1 (1.68-2.11)
)
0.345 0.416 0.519 0.600 0.709 0.796 0.885 0.975 1.10 1.20
6-hr
(0.316-0.378) (0.382-0.456) (0.476-0.568) (0.548-0.655) (0.644-0.772) (0.718-0.866) (0.792-0.961) (0.864-1.06) (0.962-1.20 1 (1.03-1.30)
0.203 0.245 0.307 0.357 0.425 0.480 0.537 0.596 F 0.679 0.745
12-hr
(0.187-0.222) (0.225-0.269) (0.282-0.336) (0.326-0.390) (0.386-0.463) (0.432-0.522) (0.479-0.583) (0.526-0.646) (0.589-0.735) (0.638-0.807)
I
0.120 0.145 0.182 0.211 0.251 0.282 0.314 0.348 0.393 0.429
24-hr
(0.111-0.130) ( 0.135-0.157) ( 0.169-0.197) ( 0.196-0.228) ( 0.232-0.270) (0.260-0.304) (0.289-0.339) (0.319-0.375) (0.359-0.424) (0.390-0.464)
2-day 0.162 0.180 0.199 24 0.2440.070 .085 06 .122 .145
(0.065-0.076) (0.079-0.092) (0.098-0.114) (0.113-0.132) (0.134-0.155) (0.150-0.175I(0.166-0.194)0(.182-0.214) (0.222-0.264)
0.050 0.060 0.074 0.086 0.101 0.113 0.126 0.139 0.156 0.170
3-day
(0.046-0.053) (0.056-0.064) (0.069-0.080) (0.079-0.092) (0.093-0.108) (0.104-0.122) (0.116-0.135) (0.127-0.149) (0.143-0.168) (0.155-0.183)
0.039 0.047 0.058 0.067 0.079 0.089 0.098 0.108 0.122 0.133
4-day
(0.037-0.042) (0.044-0.051) (0.054-0.063) (0.062-0.072) (0.073-0.085) (0.082-0.095) (0.091-0.106) (0.100-0.116) (0.112-0.131) (0.121-0.143)
0.026 0.031 0.038 0.043 0.051 0.056 0.062 0.069 0.077 0.084
7-day
(0.024-0.028) (0.029-0.033) (0.035-0.040) (0.040-0.046) (0.047-0.054) (0.053-0.060) (0.058-0.067) (0.064-0.073) (0.071-0.083) (0.077-0.090)
F 0.025 0.030 0.034 0.039 0.043 0.047 0.052 0.058 0.062
F0.021
10-day
(0.020-0.022) (0.023-0.026) (0.028-0.032) (0.032-0.036) (0.036-0.042) (0.040-0.046) (0.044-0.051) (0.048-0.055) (0.053-0.061) (0.057-0.066)
0.014 0.017 0.020 0.022 0.025 0.028 0.030 0.033 0.036 0.039
20-day
(0.013-0.015) (0.016-0.017) (0.018-0.021) (0.021-0.023) (0.024-0.026) (0.026-0.029) (0.028-0.032) (0.030-0.034) (0.033-0.038) (0.036-0.041)
0.011 0.013 0.016 0.017 0.020 0.021 0.023 0.025 0.027 0.029
30-day
(0.011-0.012) (0.013-0.014) (0.015-0.017) (0.016-0.018) (0.019-0.021) (0.020-0.023) (0.022-0.024) (0.023-0.026) (0.025-0.029) (0.027-0.030)
0.010 0.011 0.013 0.014 0.016 0.017 0.018 0.019 0.021 0.022
45-day
(0.009-0.010) (0.011-0.012) (0.012-0.013) (0.013-0.015) (0.015-0.016) (0.016-0.018) (0.017-0.019) (0.018-0.020) (0.020-0.022) (0.021-0.023)
0.009 0.010 0.011 0.012 0.014 0.015 0.016 0.016 0.018 0.019
�-day
(0.008-0.009) (0.010-0.010) (0.011-0.012) (0.012-0.013) (0.013-0.014) (0.014-0.015) (0.015-0.016) (0.016-0.017) (0.017-0.019) (0.018-0.019)
Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a
given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not
checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
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PF graphical
https:Hhdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.2372&Ion=-80.619l &data=intensity&units=english&series=pds 1/4

10/14/21, 1:00 PM Precipitation Frequency Data Server
PDS-based intensity -duration -frequency (IDF) curves
Latitude: 35.2372', Longitude:-80.61911
100.000
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NOAA Atlas 14, Volume 2, Version 3 Created (GMT): Thu Oct 14 16:59-47 2021
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
(years)
— 1
2
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50
100
200
500
1000
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— "in —
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7-day
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— 2-nr —
20-day
— 3-hr —
30-day
— 6-hr —
45-day
— 12-hr —
6o-day
— 24-hr
https:Hhdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.2372&Ion=-80.619l &data=intensity&units=english&series=pds 2/4

10/14/21, 1:00 PM
Precipitation Frequency Data Server
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https:Hhdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.2372&Ion=-80.619l &data=intensity&units=english&series=pds 3/4

10/14/21, 1:00 PM
Precipitation Frequency Data Server
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US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring, MD 20910
Questions?: [e-mail]
Disclaimer
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CLEAR CREEK QUARRY 2022 PERMIT MODIFICATION EV. No. DESCRIPTION !3..
INITIALSCALE ^�
alley, Williams, carmen, & king, inc. 12-16-21 11523
CONSULTING ENGINEERS 1 ADD BERM, ADJ SCALE `1' = 120' °RAN" BY: RCC SEDIMENT BASIN SHEEF NO.
Firm License # F-0203 VULCAN CONSTRUCTION MATERIALS PROFILE ECKEURY:DRAINAGE AREAS120 SOUTH MAIN STREET P.O. BOX 1248 MECKLENBURG COUNTY NC Z.KANNAPOLIS, NC 28082 704/938-1515owc Ro.. OF: 1

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I ROCK DA - 22-2
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J 1 R CK DAM 22
alley, williams, carmen, & king, inc.
CONSULTING ENGINEERS ROCK DAM SEDIMENT BASIN EXHIBIT
FIRM LICENSE No. F-0203 CLEAR CREK QUARRY
120 SOUTH MAIN STREET 704 938BOX 1515 VULCAN CONSTRUCTION MATERIALS L.P.
KANNAPOLIS, NC 28082 704/938-1515
CHARLOTTE, NORTH CAROLINA
WE: 2_24_2022 1
SCALE: 1' = 50' JOB No.: 11523

ROCK DAMS - E.S.C.P.D.M. PRACTICE 6.63
VULCAN CONSTRUCTION MATERIALS, L.P. RCC
CLEAR CREEK QUARRY 12/16/2022
11523
DESIGN
REQUIRED
REQUIRED
CLEANOUT
SURFACE AREA
SURFACE
AREA
RUNOFF
STORAGE
SURFACE AREA
DEPTH
FREEBOARD
BASIN BOTTOM DIMENSIONS
DEPTH
STORAGE
DIMENSIONS
AREA
SPILLWAY
ACRES
(FT
(FTL)
IN/HR)
(CFS)
(IN/HR
(CFS
(FT)
(FT2)
(FT)
FT
(FT)
FT
FT
(FT)
(FT)
Lu
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Lu
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N
Z)
Z
Q
H
H
N
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0
U
UO
U
U
Z
O
L
Z
O
LL
Z
Z
RD 22-1
6.1
6.1
0.5
7.36
22.4
8.11
24.7
21,960.0
9,778.3
3.5
2
IRREGULAR - SEE CHART
1.8
30,239.0
IRREGULAR - SEE CHART
10,069.0
23.3
RD 22-2
3.2
3.2
0.5
7.36
11.8
8.11
13.0
11,520.0
5,129.6
3.5
2
IRREGULAR - SEE CHART
1.8
15,773.0
IRREGULAR - SEE CHART
5,561.0
1 12.2
DESIGN NOTES:
SEDIMENT STORAGE = 3600 CF PER DISTURBED ACRE
THE BASIN SIDE SLOPES ARE 2:1
THE SPILLWAY LENGTH IS BASED ON A WEIR FORMULA USING A "C" VALUE OF 3.0, A FLOW DEPTH OF 0.5 FEET, AND AN OVERALL DEPTH OF 2 FEET
CLEANOUT DEPTH = 50% OF THE DESIGN STORAGE
REQUIRED SURFACE AREA FOR EFFICIENCY = 0.01*Q10*43560
SPILLWAY FLOWS ARE BASED ON A 5 MINUTE Tc FOR A 25 YEAR STORM EVENT

VMC Clear Creek Quarry 2022 Mine Modification
11523
SEDIMENT BASIN VOLUME COMPUTATION CHARTS
RD 22-1
ELEVATION
SURFACE
AREA
SF
INC.
VOLUME
FT
STORAGE
VOLUME
FT
NOTES
653.0
7273
0.00
0.00
BASIN FLOOR
654.0
8031
7652.00
7652.00
655.0
8821
8426.00
16078.00
CLEANOUT 654.8
656.0
9645
9233.00
25311.00
656.5
10069
4928.50
30239.50
SEDIMENT STORAGE
RD 22-2
ELEVATION
SURFACE
AREA
SF
INC.
VOLUME
FT
STORAGE
VOLUME
FT
NOTES
643.0
3516
0.00
0.00
BASIN FLOOR
644.0
4058
3787.00
3787.00
645.0
4634
4346.00
8133.00
CLEANOUT 644.8
646.0
5244
4939.00
13072.00
646.5
5561
2701.25
15773.25
SEDIMENT STORAGE

alley, williams, carmen, & king, inc.
CONSULTING ENGINEERS
FIRM LICENSE No. F-0203
120 SOUTH MAIN STREET P.O. BOX 1248
704/938-1515
KANNAPOLIS, NC 28082
CHANNEL DESIGN EXHIBIT
CLEAR CREK QUARRY
VULCAN CONSTRUCTION MATERIALS L.P.
CHARLOTTE, NORTH CAROLINA
2-25-2022 (SCALE: 1" = 50' 1JOB No.: 11523

Hydraulic Analysis Report
Project Data
Project Title: VMC 22 Clear Creek Mine Modification
Designer:
Project Date: Friday, February 25, 2022
Project Units: U.S. Customary Units
Notes:
Channel Analysis: Rirprap Channel 22-1 Max
Notes:
Input Parameters
Channel Type: Trapezoidal
Side Slope 1 (Z1): 2.0000 ft/ft
Side Slope 2 (Z2): 2.0000 ft/ft
Channel Width: 3.0000 ft
Longitudinal Slope: 0.1700 ft/ft
Manning's n: 0.0780
Flow: 8.9000 cfs
Result Parameters
Depth: 0.5208 ft
Area of Flow: 2.1050 ft^2
Wetted Perimeter: 5.3292 ft
Hydraulic Radius: 0.3950 ft
Average Velocity: 4.2280 ft/s
Top Width: 5.0833 ft
Froude Number: 1.1579
Critical Depth: 0.5680 ft
Critical Velocity: 3.7883 ft/s
Critical Slope: 0.1241 ft/ft
Critical Top Width: 5.27 ft
Calculated Max Shear Stress: 5.5249 Ib/ft^2
Calculated Avg Shear Stress: 4.1901 Ib/ft^2

Channel Analysis: Rirprap Channel 22-1 Min
Notes:
Input Parameters
Channel Type: Trapezoidal
Side Slope 1 (Z1): 2.0000 ft/ft
Side Slope 2 (Z2): 2.0000 ft/ft
Channel Width: 3.0000 ft
Longitudinal Slope: 0.0510 ft/ft
Manning's n: 0.0780
Flow: 8.9000 cfs
Result Parameters
Depth: 0.7233 ft
Area of Flow: 3.2162 ft12
Wetted Perimeter: 6.2347 ft
Hydraulic Radius: 0.5159 ft
Average Velocity: 2.7672 ft/s
Top Width: 5.8932 ft
Froude Number: 0.6601
Critical Depth: 0.5681 ft
Critical Velocity: 3.7880 ft/s
Critical Slope: 0.1241 ft/ft
Critical Top Width: 5.27 ft
Calculated Max Shear Stress: 2.3018 Ib/ft^2
Calculated Avg Shear Stress: 1.6417 Ib/ft"2