2015-09-22_HYDROLOGY - M1980110

• Permit No: M1980110
• IBM Index Class Name: HYDROLOGY
• Doc Date: 9/22/2015
• Doc Name: Sub Water Supply Plan
• From: DWR
• To: DRMS
• Email Name: TOD
• Media Type: D
• Archive: No

Table 1
E-470 Public Highway Authority
Sandy Acres Pit SWSP
Total Maximum Evaporation
Notes:
(1) Total gross evaporation is based upon NOAA Technical Report NWS 33 and is distributed according to Senate Bill 89-120 criteria for sites below 6,500 feet
in elevation:
Jan: 3.0% Jul: 150%
Feb: 3.5% Aug: 13.5%
Mar 5.5% Sep: 10.0%
Apr: 9.0% Oct. 7.0%
May: 12.0% Nov: 4.0%
Jun: 14.5% Dec: 3.0%
(2) Average precipitation at the Brighton 1 NE, CO (ID# 0950) NOAA weather station from 1974-2013.
(3) Assumed 70% effective precipitation. (3) is equal to (2) x 70%.
(4) is equal to (1) - (3).
(5) is equal to (4)/12 inches
(6) An updated pit survey was completed August 8, 2015 by R.W. Bayer Associates to identify reduced surface area from the ongoing backfilling operation at
Sandy Acres Pit. Beginning September 2015, evaporative depletions from the pit are based on the surface area determined by the new survey (25.51 acres). Net
and lagged net pond evaporation from September 2015 have been reduced accordingly relative to the values stated in the SWSP Extension request submitted in
April 2015.
(7) Net Pond Evaporation is equal to net evaporation in feet (5) x total exposed surface area of the pond Note that evaporation is assumed to equal zero in
December and January because the average daily temperature at the Brighton INE, CO (ID #USC00050950) NOAA weather station is below freezing.
(8) Lagged depletions based on IDS AWAS Glover Analysis using the following parameters (assuming steady-state conditions):
Harmonic Transmissivity: 78,729 gallons/day/foot
Specific Yield: 0.2
Aquifer Width. 12,172.6 feet
Distance from centroid of pit to river: 3,173 4 feet
Sandy Acres SWSP Calcs.xlsx
BBA T I -Total Evap (2016)
8/14/2015
BISHOP BNOOOLY A­OCIATIC 1-
Average
Total Net
Total Lagged
Gross
Annual
Effective
Net
Net
Water
Pond
Net Pond
Evaporation
Precipitation
Precipitation
Evaporation
Evaporation
Surface Area
Evaporation
Evaporation
Month
(inches)
(inches)
(inches)
(inches)
(feet)
(acres)
(ac -ft)
(ac -ft)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Sep -15
4.47
1.13
0.79
3.68
0.31
25.51,-
'. 7:81'
"9.50'
Oct -l5
3.13
0.88
0.62
251
0.21
25.51
5.34
9.35
Nov -15
1.79
0.75
0.53
1.26
0.11
25.51
2.68
8.57
Dec -15
1.34
0.48
0.33
1.01
0.08
25.51
0
7.63
Jan -16
1.34
0.42
0.29
1.05
0.09
25.51
0
6.61
Feb -l6
1.56
0.38
0.27
1.30
0.11
25.51
2.75
5.88
Mar -16
2.46
1.11
0.78
1.68
0.14
25.51
3.57
5.66
Apr -16
4.02
1.69
1.18
2.84
0.24
25.51
6.04
5.68
May -16
5.36
2.30
1.61
3.76
0.31
25.51
7.99
6.01
Jun -16
6.48
1.54
1.08
5.40
0.45
2551
11.48
6.55
Jul -16
6.70
1.51
1.06
5.64
0.47
25.51
12.00
7.36
Aug -16
6.03
1.61
1.12
4.91
0.41
25.51
10.44
8.04
Sep -16
4.47
1.13
0.79
3.68
0.31
25.51
7.81
8.30
Plan Year 2016 Total
44.69
13.80
9.66
35.03
292
70.10
85.64
Notes:
(1) Total gross evaporation is based upon NOAA Technical Report NWS 33 and is distributed according to Senate Bill 89-120 criteria for sites below 6,500 feet
in elevation:
Jan: 3.0% Jul: 150%
Feb: 3.5% Aug: 13.5%
Mar 5.5% Sep: 10.0%
Apr: 9.0% Oct. 7.0%
May: 12.0% Nov: 4.0%
Jun: 14.5% Dec: 3.0%
(2) Average precipitation at the Brighton 1 NE, CO (ID# 0950) NOAA weather station from 1974-2013.
(3) Assumed 70% effective precipitation. (3) is equal to (2) x 70%.
(4) is equal to (1) - (3).
(5) is equal to (4)/12 inches
(6) An updated pit survey was completed August 8, 2015 by R.W. Bayer Associates to identify reduced surface area from the ongoing backfilling operation at
Sandy Acres Pit. Beginning September 2015, evaporative depletions from the pit are based on the surface area determined by the new survey (25.51 acres). Net
and lagged net pond evaporation from September 2015 have been reduced accordingly relative to the values stated in the SWSP Extension request submitted in
April 2015.
(7) Net Pond Evaporation is equal to net evaporation in feet (5) x total exposed surface area of the pond Note that evaporation is assumed to equal zero in
December and January because the average daily temperature at the Brighton INE, CO (ID #USC00050950) NOAA weather station is below freezing.
(8) Lagged depletions based on IDS AWAS Glover Analysis using the following parameters (assuming steady-state conditions):
Harmonic Transmissivity: 78,729 gallons/day/foot
Specific Yield: 0.2
Aquifer Width. 12,172.6 feet
Distance from centroid of pit to river: 3,173 4 feet
Sandy Acres SWSP Calcs.xlsx
BBA T I -Total Evap (2016)
8/14/2015
BISHOP BNOOOLY A­OCIATIC 1-