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STORM RUNOFF Title : Starbucks Meridian STORM RUNOFF Title : Starbucks Meridian STORM RUNOFF Title : Starbucks Meridian = (A
CALCULATION Scope: Site Drainage Design CALCULATION Scope: Site Drainage Design CALCULATION Scope: Site Drainage Design o
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SHEET Tributary Area 1 Retention Facilities SHEET Tributary Area 2 Retention Facilities SHEET Tributary Area 3 Retention Facilities d J M
Mcneil Engineering Project No. Engineer: TJD Check: RJP Mcneil Engineering Project No. Engineer: TJD Check: RJP Mcneil Engineering Project No. Engineer : TJD Check: RJP co
8610 S. Sandy Pkwy, Sandy, UT 21070 Authority : Meridian, ID Rev. No.: 0 8610 S. Sandy Pkwy, Sandy, UT 21070 Authority : Meridian, ID Rev. No.: 0 8610 S. Sandy Pkwy, Sandy, UT 21070 Authority : Meridian, ID Rev. No.: 0 °9 � J
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Design Philosophy: Design Philosophy: Design Philosophy: W
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The storm water runoff from the project site will sheet flow to the drive isles where The storm water runoff from the project site will sheet flow to the drive isles where The storm water runoff from the project site will sheet flow to the drive isles where
stormwater fill flow in gutters to a curb cut where storm water will flow through a curb stormwater fill flow in gutters to a curb cut where storm water will flow through a curb stormwater fill flow in gutters to a curb cut where storm water will flow through a curb MJ G y
cut to a site retention basin sized for the 100-year storm. cut to a site retention basin sized for the 100-year storm. cut to a site retention basin sized for the 100-year storm. o U C
Area Identification Runoff Coefficient Area Identification Runoff Coefficient Area Identification Runoff Coefficient W tx W
(A) (C) (C*A) (A) (C) (C'A) (A) (C) (C'A) L.
Paved 5,106 sf (0.12 ac) 0.85 = 4,340 sf Paved 1,395 sf (0.03 ac) 0.85 = 1,186 sf Paved 5,086 sf (0.12 ac) 0.85 = 4,323 sf Z o 3 y
Roof Area 1,150 sf (0.03 ac) 0.90 = 1,035 sf Roof Area 1,150 sf (0.03 ac) 0.90 = 1,035 sf Roof Area 0 sf (0.00 ac) 0.90 = 0 sf o C V
Landscaped 1,664 sf (0.04 ac) 0.15 = 250 sf Landscaped 3,765 sf (0.09 ac) 0.15 = 565 sf Landscaped 5,647 sf (0.13 ac) 0.15 = 847 sf "' •bA 3
Total 7,920 sf (0.18 ac) 0.71 lave) 5,625 sf Total 6,310 sf (0.14 ac) 0.44 (ave) 2,786 sf Total 10,733 sf (0.25 ac) 0.48 (ave) 5,170 sf b W N
Allowable Discharge Rate = 0.00 cfs/ac Allowable Discharge Rate = 0.00 cfs/ac Allowable Discharge Rate = 0.00 cfs/ac y Z
100-Year, 24-Hour Storm: Allowable Peak Discharge = 0.00 cfs
Time Rate Rainfall Q in Add'I Q in Total Q in Q out Storage
(min) (in/hr) (Inches) (cfs) (cfs) (cfs) (cfs) (cf)
5
6.36
0.53
0.83
0.00
0.83
0.00
248
10
4.86
0.81
0.63
0.00
0.63
0.00
380
15
4.00
1.00
0.52
0.00
0.52
0.00
469
30
2.70
1.35
0.35
0.00
0.35
0.00
633
60
1.67
1.67
0.22
0.00
0.22
0.00
783
120
0.91
1.82
0.12
0.00
0.12
0.00
853
180
0.62
1.85
0.08
0.00
0.08
0.00
867
360
0.33
1.98
0.04
0.00
0.04
0.00
928
720
0.19
2.29
0.02
0.00
0.02
0.00
1,073
1440
0.10
2.46
0.01
0.00
0.01
0.00
1,153
100-Year, 24-Hour Storm: Allowable Peak Discharge = 0.00 cfs
Time Rate Rainfall Q in Add'I Q in Total Q in Q out Storage
(min) (in/hr) (Inches) (cfs) (cfs) (cfs) (cfs) (cf)
5
6.36
0.53
0.41
0.00
0.41
0.00
123
10
4.86
0.81
0.31
0.00
0.31
0.00
188
15
4.00
1.00
0.26
0.00
0.26
0.00
232
30
2.70
1.35
0.17
0.00
0.17
0.00
313
60
1.67
1.67
0.11
0.00
0A 1
0.00
388
120
0.91
1.82
0.06
0.00
0.06
0.00
422
180
1 0.62
1.85
0.04
0.00
0.04
0.00
429
360
0.33
1.98
0.02
0.00
0.02
0.00
460
720
0.19
2.29
0.01
0.00
0.01
0.00
1 532
1440
0.10
2.46
0.01
0.00
0.01
0.00
1 571
100-Year, 24-Hour Storm: Allowable Peak Discharge = 0.00 cfs
Time Rate Rainfall Q in Add'I Q in Total Q in Q out Storage
(min) (in/hr) (Inches) (cfs) (cfs) (cfs) (cfs) (cf)
5
6.36
0.53
0.76
0.00
0.76
0.00
228
10
4.86
0.81
0.58
0.00
0.58
0.00
349
15
4.00
1.00
0.48
0.00
0.48
0.00
431
30
2.70
1.35
0.32
0.00
0.32
0.00
582
60
1.67
1.67
0.20
0.00
0.20
0.00
720
120
0.91
1.82
0.11
0.00
0.11
0.00
784
180
1 0.62
1.85
1 0.07
1 0.00
0.07
0.00
797
360
0.33
1.98
0.04
0.00
0.04
0.00
853
720
0.19
2.29
0.02
0.00
0.02
0.00
987
1440
0.10
2.46
0.01
0.00
0.01
0.00
1,060
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Surface Storage Provided:
Surface Storage Provided:
Surface Storage Provided:
Pond Area(sf) Depth (ft) Volume (cu. ft.)
Pond Area(sf) Depth (ft) Volume (cu. ft.)
Pond Area(sf) Depth (ft) Volume (cu. ft.)
Basin 1 2328 1 1164 cf
Basin 1 2294 0.5 574 cf
Basin 1 2270 0.5 1135 cf
Total Surface Storage 1164 cf
Total Surface Storage 574 cf
Total Surface Storage 1135 cf
Total Retention Provided : 1,164 cf
Total Retention Provided : 574 cf
Total Retention Provided : 1,135 cf
Total Retention Required : 1,153 cf
Total Retention Required : 571 cf
Total Retention Required : 1,060 cf
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PROJECT NO: 21070
DRAWN BY: CCW
CHECKED BY: RJP
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DATE: FEBRUARY 7, 2022
CIVIL
DETAILS
C5.02