HomeMy WebLinkAboutWPO201300032 Calculations 2014-06-16 SEDIMENTS BASIN CALCULATIONS
FOR
Cascadia (Blocks 4-7)
June 16, 2014
Tax Map 78-59, 78-59A, 62-25, 78E-H1
Rivanna District, Albemarle County, Virginia
OWNER / DEVELOPER:
Cascadia Development, LLC
170 South Pantops Drive
Charlottesville, VA 22903 0 �% ���%
• ,o,c.No.33028
PREPARED BY: + _ +,_
Dominion Engineering and Design, LL
172 South Pantops Drive 6"570NAL
Charlottesville, VA 22903
P: 434.979.8121
F: 434.979.1681
TEMPORARY SEDIMENT BASIN
' PROJECT CASCADIA PROJ NO. 12.0065
BASIN# SEDIMENT BASIN S B-1 DATE 6/17/2014
LOCATION BY ARC
Phase 2 drainage area is 19.55 Acres. The Basin is
INPUT designed for 20.79 Acres. SB-1 is adequate_ly des_igned
DRAINAGE AREA 'for the ultimate Phase 2 Drainage area. 20.79 ac
BASIN VOLUME DESIGN
WET STORAGE i
1.MINIMUM REQUIRED VOLUME 1392.93 cy
.
2.AVAILABLE BASIN VOLUME
AVERAGE END AREA-BASIN VOLUME ESTIMATES
ELEVATION I AREA I VOLUME i VOLUME 1 TOTAL
r I
370.2 1,156.00 _ cy
2,221.20_ 82.27
371 4,397.00 82.27
38,551.50 1,427.83
372 18,054.00 1,510.10
39,358.00 1,457.70
374 n 21,304.00 _ 2,967.80
47,613.00 1,763.44
376 26,309.00 4,731.25
REQUIRED WET STORAGE VOLUME 1,392.93 cy
APPROX.ELEVATION . . 372.00
3.EXCAVATE CUBIC YARDS
4.AVAILABLE VOLUME BEFORE CLEANOUT REQUIRED 686.O7,cy
5.ELEVATION CORRESPONDING TO CLEANOUT LEVEL 371.00
6.DISTANCE FROM DEWATERING ORIFICE TO CIO LEVEL
INVERT DEWATERING ORIFICE R'QD 371.00
INVERT DEWATERING ORIFICE USED 371.00
APPROX.VOLUME AT INVERT USED 710.00 cy
.
DISTANCE FROM INVERT TO CIO LEVEL 1.00 ft
DRY STORAGE '
7.MINIMUM REQUIRED VOLUME 1392.93 cy
8.TOTAL AVAILABLE VOL UME AT CREST OF RISER
CREST OF RISER ! '
. 1
376.00
APPROX.AVAILABLE TOTAL VOLUME 4731.25 cy
ADEQUATE DRY STORAGE VOLUME
9.DIAMETER OF DEWATERING ORIFICE
Q I 1.74 cfs
d 6.80in
USE d 6 in
10.DIAMETER OF FLEXIBLE TUBING 8!in
STANDARD SIZE
PRELIMINARY DESIGN i1
11.P RE LIMINARY DESIGN ELEVATIONS:
CREST OF RISER 375.00'ft '
TOP OF DAM 379.00'ft
DESIGN HIGH WATER 378.00'ft 'design of high water assumes a peak flowrate
UPSTREAM TOE OF DAM 370.20,ft of 19.50 cfs storage volume is not considered.
Page 1 78-59-SB1.xls
' TEMPORARY SEDIMENT BASIN
PROJECT CASCADIA PROJ NO. 12.0065
BASIN# : SEDIMENT BASIN SB-1 :DATE
LOCATION ATION . BY ARC
Phase 2 drainage area is Acres. The Basin is
BASIN SHAPE
12.LENGTH OF FLOW/EFFECTIVE WIDTH:SOUTH RUN 1 12.LENGTH OF FLOW/EFFECTIVE WIDTH:EAST
SURFACE AREA OF NORMAL POOL 18054 sf S U RFACE AREA OF NORMAL POOL
LENGTH OF FLOW PATH 90 ft LENGTH OF FLOW PATH
EFFECTIVE WIDTH! 200 ft EFFECTIVE WIDTH
UWe 0.45 L/We
+BAFFLES REQUIRED
RUNOFF
(RATIONAL METHOD CALCULATION)
USE MAXIMUM C VALUE DURING CONSTRUCTION AND MINIMUM Tc VALUE
13.FLOW FROM 2-YEAR STORM
C:� 0.60
Tc: 20.0 I: 2.9 in/hr
Q= 36.2 cfs '
14.FLOW FROM 25-YEAR STORM
C: 0.60.
Tc: 20.0 I: 4.8 in/hr
4= 59.9 cfs
.
PRINCIPAL SPILLWAY DESIGN
15.REQUIRED SPILLWAY CAPACITY:
EMERGENCY SPILLWAY?(Y/N) y
REQUIRED SPILLWAY CAPACITY: 36.2 CFS
16.ASSUMED AVAILABLE HEAD: :
ELEV.OF CREST OF E.S.IF USED: 377.00
ASSUMED AVAILABLE HEAD= 1.00 ft
17.DIMENSIONS,ORIFICE:
RISER DIAMETER: 12.00 1 in (From Plate 3.14-8 or Calcs)
ACTUAL MAX.E_LEV.:' 378.00 ft (From Calcs if appropriate)
MAX'Q=4.6 cfs (_From Plate 3.14-8 or Calcs)
Ics)
18.BARRE L LENGTH:
BARREL LENGTH: 55.00 ft
B ARREL INVERT OUT: 369.00 ft
HEAD H O N BARREL: 9.00 ft ,(From Plate 3.14-7)
19.BARREL DIAMETER:
BARREL DIAMETER: 24 in i(From Plate 3.14A or 3.14B)
20.TRASH RAC K AND ANTI-VORTEX DEVICE:
EXISTING (From Plate 3.14D)
EMERGENCY SPILLWAY DESIGN
21.REQUIRED SPILLWAY CAPACITY:
Qe=Q(25)-Qp= 23.7 CFS
22.DIMENSIONS:
BOTTOM WIDTH(b):, 10.00 ft (From Table 3.14-C)
SLOPE OF EXIT CHANNEL(s):i 0.03.ft/ft (From Table 3.14-C)
MIN.LENGTH EXIT CHANNEL(x):1 51.00',ft (From Table 3.14-C)'
. .
ANTI-SEEP COLLAR DESIGN
23.DIMENSIONS:
DEPTH WATER @ CREST OF P.S.(Y): NA ft
SLOPE UPSTREAM FACE DAM(Z): NA :1 '
SLOPE P.S.BARREL(Sb): NA%
LENGTH BARREL IN SAT.ZONE(Ls): NA ft (From Plate 3.14-11)
24.NUMBER OF C OLLARS:
NUMBER REQUIRED: 2 1(From Plate 3.14-12)
DIMENSIONS: 5.8 ftA2 (From Plate 3.14-12)
FINAL DESIGN ELEVATIONS
25.ELEVATIONS: 1
TOP OF DAM:1 379.00:ft '
DESIGN HIGH WATER: 378.00 ft '
EMERGENCY SPILLWAY CREST:1 377.00 ft
PRINCIPAL SPILLWAY CREST: 378.00 ft
DEWATERING ORIFICE INVERT: 372.00 ft
CLEANOUT ELEVATION:. 371.00 ft
Page 2 78-59-SB1.xls
TEMPORARY SEDIMENT BASIN
' PROJECT CASCADIA SUBDIVISION PROJ NO. 10.0171
BASIN# ' SEDIMENT BASIN SB-2 DATE 6/13/2014
LOCATION BY CWS
INPUT
DRAINAGE AREA
EA 45.10 ac
BASIN VOLUME DESIGN
WET STORAGE
1.MINIMUM REQUIRED VOLUME 3021.70 ,cy
2.AVAILABLE BASIN VOLUME
AVERAGE END AREA-BASIN VOLUME ESTIMATES
ELEVATION I AREA I VOLUME T VOLUME 1 TOTAL
344.99 . 1.00 I I
167.43 6.20
345 33,485.00 6.20
' 34,481.50 1,277.09
346 35,478.00 1,283.29
75,020.00 2,778.52
348 39,542.00 4,061.81
190,390.00 7,051.48
348.5 40,574.00 11,113.29
68,857.50 2,550.28
350 51,236.00 13,663.57
106,889.00 3,958.85
352 55,653.00 17,622.42
115,848.00 4,290.67
354 60,195.00 21,9.13.09
125,049.00 4,631.44
356 64,854.00 , 26,544.53
134,456.00 4,979.85
358 69,602.00 31,524.39
24,164.58 894.98
358.33 1 76,850.00 32,419.37
REQUIRED WET STORAGE VOLUME 3,021.70 cy
APPROX.ELEVATION 348.12
3.EXCAVATE CUBIC YARDS
4.AVAILABLE VOLUME BEFORE CLEANOUT REQUIRED 1488.30 cy
5.ELEVATION CORRESPONDING TO CLEANOUT LEVEL 347.50
6.DISTANCE FROM DEWATERING ORIFICE TO C/O LEVEL
INVERT DEWATERING ORIFICE R'QD 348.12
INVERT DEWATERING ORIFICE USED 350.00
APPROX.VOLUME AT INVERT USED 13663.00 cy
DISTANCE FROM INVERT TO CIO LEVEL 2.50 ft
DISTANCE ACCEPTABLE
WET STORAGE VOLUME A CCEPTABLE .
DRY STORAGE
7.MINIMUM REQUIRED VOLUME 3021.70 cy
8.TOTAL AVAILABLE VOLUME AT CREST OF RISER
CREST OF RISER 355.70
APPROX.AVAILABLE TOTAL VOLUME 12187.00 cy
,INADEQUATE DRY STORAGE VOLUME
9.DIAMETER OF DEWATERING ORIFICE
Q 18.21 cfs
d 1.65.in
USE d , 3 in
10.DIAMETER OF FLEXIBLE TUBING 6 in
STANDARD SIZE
PRELIMINARY DESIGN
11.PRELIMINARY DESIGN ELEVATIONS:
CREST OF RISER 355.70 ft
TOP OF DAM 358.33 ft
DESIGN HIGH WATER 357.33 ft *design of high water assumes a peak flowrate
UPSTREAM TOE OF DAM 346.00 ft of 19.50 cfs storage volume is not considered.
Page 1 78-59-SB2 xls
TEMPORARY SEDIMENT BASIN
PROJECT CASCADIA SUBDIVISION PROJ NO. 10.0171
BASIN# S EDIMENT BASIN SB-2 _DATE 6/13/2014
LOCATION BY CWS
BASIN SHAPE
12.LENGTH OF FLOW/EFFECTIVE WIDTH:
S URFACE AREA OF NORMAL POOL 58996 sf
LENGTH OF FLOW PATH 150 ft
EFFECTIVE WIDTH 300 ft
L/We 0.50 BAFFLES REQUIRED
RUNOFF
(RATIONAL METHOD CALCULATION) .
USE MAXIMUM C VALUE DURING CONSTRUCTION AN D MINIMUM Tc VALUE
13.FLOW FROM 2-YEAR STORM
C: 0.66
Tc:t 30.0 I: 2.2 in/hr
Q=' 65.8 cfs
14.FLOW F_ROM 25-YEAR STORM
C: 0.66
Tc: 30.0 I: 3.2 in/hr
Q= 95.3 cfs
PRINCIPAL SPILLWAY DESIGN
15.REQUIRED SPILLWAY CAPACITY:
EMERGENCY SPILLWAY?(Y/N), y
REQUIRED SPILLWAY CAPACITY: 31.6 CFS
16.ASSUMED AVAILABLE HEAD:
ELEV.OF CREST OF E.S.IF USED: 356.33
ASSUMED AVAILABLE HEAD= 1.00 ft
17.RISER DIMENSIONS:
RISER DIAMETER:ETER: 60.00 in (From Plate 3.14-8 or Calcs)
ACTUAL MAX.ELEV.: 357.33 ft (From Calcs if appropriate)
ACTUAL HEAD: 1.63 ft (From Plate 3.14-8 or Calcs)
18.BARREL LENGTH:
BARREL LENGTH: 75.00 ft
.
.
BARREL INVERT OUT:t 346.00 ft
HEAD H O N BARREL: 11.33 ft (From Plate 3.14-7)
19.BARREL DIAMETER:
BARREL DIAMETER: 30 in (From Plate 3.14A or 3.14B)
20.TRASH RACK AND ANTI-VORTEX DEVICE:
DIAMETER: 90 in (From Plate 3.14D)
HEIGHT: 29 in
EMERGENCY SPILLWAY DESIGN
21.REQUIRED SPILLWAY CAPACITY:
Qe=Q(25)-Qp= 31.6 CFS
22.DIMENSION S:
BOTTOM WIDTH(b): 20.00 ft (From Table 3.14-C)
SLOPE OF EXIT CHANNEL(s): 0.18 ft/ft (From Table 3.14-C)
MIN.LENGTH EXIT CHANNEL(x): 52.00 ft (From Table 3.14-C)
ANTI-SEEP COLLAR DESIGN
23.DIMENSIONS:
DEPTH WATER @ CREST OF P.S.(Y):' 9.70 ft
SLOPE UPSTREAM FACE DAM(Z): 2.00 :1
SLOPE P.S.BARREL(Sb): 1.71 %
LENGTH BARREL IN SAT.ZONE(Ls): 60.00 ft (From Plate 3 14-11)
24.NUMBER OF COLLARS:_
NUMBER REQUIRED: 2 (From Plate 3.14-12)
DIMENSIONS: 5.1 ft"2 (From Plate 3.14-12)
FINAL DESIGN ELEVATIONS
25.ELEVATIONS:
TOP OF DAM: 358.33 ft
DESIGN HIGH WATER: 357.33 ft
EMERGENCY SPILLWAY CREST: 356.33 ft
PRINCIPAL SPILLWAY CREST: 355.70 ft
DEWATERING ORIFICE INVERT: 350.00 ft
CLEANOUT ELEVATION: 347.50 ft
Page 2 78-59-S82.xls
• TEMPORARY SEDIMENT BASIN
PROJECT CASCADIA PROJ N_O__. 12.0065
BASIN# SEDIMENT BASIN SB-3 !DATE_ 6/13/2014
LOCATION BY ARC
INPUT
DRAINAGE AREA 8.74 ac
BASIN VOLUME DESIGN
WET STORAGE
1.MINIMUM RE QUIRED VOLUME 585.58 cy
2.AVAILABLE BASIN VOLUME
AVERAGE END AREA-BASIN VOLUME ESTIMATES
ELEVATION I AREA ( VOLUME I VOLUME TOTAL
ft sf cf cy cy
436 912.00
2,114.00 78.30
438 1,202.00 78.30
2,728.00 101.04
440 1,526.00 179.33
3,408.00 126.22
442 1,882.00 305.56
4,153.00 153.81
444 2,271.00 459.37
3,641.78 134.88
445.5 2,584.70 594.25
7,167.13 265.45
448 3,149.00 859.70
6,786.00 251.33
450 3,637.00 1,111.03
7,795.00 288.70
452 4,158.00 1,399.74
REQUIRED WET STORAGE VOLUME 585.58 cy
APPROX.ELEVATION 445.50
3.EXCAVATE CUBIC YARDS
4.AVAILABLE VOLUME BEFORE CLEANOUT REQUIRED 292.79 cy
5.ELEVATION CORRESPONDING TO CLEANOUT LEVEL 442.00
6.DISTANCE FROM DEWATERING ORIFICE TO C/O LEVEL
INVERT DEWATERING ORIFICE R'QD 445.50
INVERT DEWATERING ORIFICE USED 445.50
APPROX.VOLUME AT INVERT USED 594.25 cy
DISTANCE FROM INVERT TO C/O LEVEL 3.50 ft
DISTANCE ACCEPTABLE
WET STORAGE VOLUME ACCEPTABLE
DRY STORAGE
7.MINIMUM REQUIRED VOLUME 585.58 cy
8.TOTAL AVAILABLE VOLUME AT CREST OF RISER
CREST OF RISER 451.00
APPROX.AVAILABLE TOTAL VOLUME 1250.50,cy
ADEQUATE DRY STORAGE VOLUME
9.DIAMETER OF DEWATERING ORIFICE
0 0.73 cfs
d 4.10 in
USE d , 4 in
10.DIAMETER OF FLEXIBLE TUBING 6 in
STANDARD SIZE
PRELIMINARY DESIGN
11.PRELIMINARY DESIGN ELEVATIONS:
CREST OF RISER 451.00 ft
TOP OF DAM 454.00 ft
DESIGN HIGH WATER 453.00 ft `design of high water assumes a peak flowrate
UPSTREAM TOE OF DAM, 436.00 ft of 19.50 cfs storage volume is not considered
Page 1 78-59-SB3.xls
' TEMPORARY SEDIMENT BASIN
PROJECT CASCADIA PROJ NO. 12.0065
BASIN# SEDIMENT BAS_IN SB-3 :DATE 6/13/2014,
LOCATION . ,BY ARC
BASIN SHAPE
12.LENGTH OF FLOW/EFFECTIVE WIDTH:NORTH RUN 12.LENGTH OF FLOW/EFFECTIVE WIDTH:SOUTH RUN
SURFACE AREA OF NORMAL POOL 2585 sf SURFACE AREA OF NORMAL POOL 2585 sf
LENGTH OF FLOW PATH 70 ft LENGTH OF FLOW PATH 20 ft
EFFECTIVE WIDTH 37 ft EFFECTIVE WIDTH 130 ft
LIWe 1.89 L We_ 0.15_
BAFFLES REQUIRED BAFFLES REQUIRED
RUNOFF
(RATIONAL METHOD CALCULATION)
USE MAXIMUM C VALUE DURING CONSTRUCTION AND MINIMUM Tc VALUE
13.FLOW FROM 2-YEAR STORM
C: 0.60
Tc: 10.0 I: 4.2 in/hr
Q= 22.0.cfs -
14.FLOW FROM 25-YEAR STORM
C: 0.60
Tc: 10.0 I: 6.5 in/hr
Q= 34.1 cfs
PRINCIPAL SPILLWAY DESIGN
15.REQUIRED SPILLWAY CAPACITY:
EMERGENCY SPILLWAY?(Y/N) y,
REQUIRED SPILLWAY CAPACITY: 12.1,CFS
16.ASSUMED AVAILABLE HEAD:
ELEV.OF CREST OF E.S.IF USED: 451.00
ASSUMED AVAILABLE HEAD= 1.00 ft
17.RISER DIMENSIONS:SIONS:
RISER DIAMETER: 36.00 (From Plate 3.14-8 or Calcs)
ACTUAL MAX.ELEV.: 452.00 ft (From Calcs if appropriate)
ACTUAL HEAD: 1.00 ft (From Plate 3.14-8 or Calcs)
18.B ARREL LENGTH:
BARREL LENGTH: 70.00 ft
BARREL INVERT OUT: 444.50 ft
HEAD H ON BARREL: 7.50 ft (From Plate 3.14-7)
19.BARREL DIAMETER:
BARREL DIAMETER: 24 in (From Plate 3.14A or 3 14B)
20.TRASH RACK AND ANTI-VORTEX DEVICE:
DIAMETER: 54.in (From Plate 3.14D)
HEIGHT: 17 in
EMERGENCY SPILLWAY DESIGN .
21.REQUIRED SPILLWAY CAPACITY:
Qe=Q(25)-Qp= 12.1 C FS
22.DIMENSIONS:
BOTTOM WIDTH(b): 8.00 ft ((From Table 3.14-C)
SLOPE OF EXIT CHANNEL(s): 0.03 ft/ft (From Table 3.14-C)
MIN.LENGTH EXIT CHANNEL(x): 51.00 ft (From Table 3.14-C)
ANTI-SEEP COLLAR DESIGN
23.DIMENSIONS:
DEPTH WATER @ CREST OF P.S.(Y):, 15.00 ft
SLOPE UPSTREAM FACE DAM(2):, :1
SLOPE P.S.BARREL(Sb): 1.70%
LENGTH BARREL IN SAT.ZONE(Ls): 65.00 ft (From Plate 3.14-11)
24.NU_MBER OF COLLARS:
NUMBER REQUIRED:,' 2 ,( From Plate 3 14-12)
DIMENSIONS:, 5.8 ftA2 (From Plate 3.14-12)
FINAL DESIGN ELEVATIONS
25.ELEVATIONS:
TOP OF DAM: 454.00 ft
DESIGN HIGH WATER: 453.00 ft
EMERGENCY SPILLWAY CREST: 452.00 ft
PRINCIPAL SPILLWAY CREST: 451.00 ft
DEWATERING ORIFICE INVERT: 445.50 ft
CLEANOUT ELEVATION: 442.00 ft
Page 2 78-59-SB3.xls
• TEMPORARY SEDIMENT BASIN
•
PROJECT CASCADIA PROJ NO. 12.0066
BASIN# SEDIMENT BASIN SB-4 6/13/2014
LOCATION BY CWS
INPUT
DRAINAGE AREA 16.61 ac
BASIN VOLUME DESIGN
WET STORAGE
1.MINIMUM REQUIRED VOLUME 1045.87 cy
2.AVAILABLE BASIN VOLUME
AVERAGE END AREA-BASIN VOLUME ESTIMATES
ELEVft I ION I ASfA I VOLUME I VOLUME TOTAL
393.99 0.00
23.28 0.86
394 4,657.00 0.8.6
10,546.00 390.59
396 5,88.9.00 391.45
13,129.00 486.26 _
398 7,240.00 877.71 _
15,948.00 590.67
400 8,708.00 1,468.38 _
18,994.00 703.48
402 10,28.6.00 2,171.86
27,982.50 1,036.39
404.5 12,100.00 3,208.25
REQUIRED WET STORAGE VOLUME 1,045.87 cy
'APPROX.ELEVATION 398.57
3.EXCAVATE CUBIC YARDS
4.AVAILABLE VOLUME BEFORE CLEANOUT REQUIRED 530.74 cy
5.ELEVATION CORRESPONDING TO CLEANOUT LEVEL 396.57
6.DISTANCE FROM DEWATERING ORIFICE TO C/O LEVEL
INVERT DEWATERING ORIFICE R'QD 398.57
INVERT DEWATERING ORIFICE USED 398.60
APPROX.VOLUME AT INVERT USED 1055.00 cy
DISTANCE FROM INVERT TO C/O LEVEL 2.03 ft
DISTANCE ACCEPTABLE
WET STORAGE VOLUME ACCEPTABLE
DRY STORAGE
7.MINIMUM REQUIRED VOLUME 1045.87 cy
8.TO TAL AVAILABLE VOLUME AT CREST O F RISER
CREST OF RISER 402.00
APPROX.AVAILABLE TOTAL VOLUME 2171.86 cy
ADEQUATE DRY STORAGE VOLUME
9.DIAMETER OF DEWATERING ORIFICE
Q 1.40 cfs
d 7.60 in
USEd 6 in
10.DIAMETER OF FLEXIBLE TUBING 8 in
STANDARD SIZE
PRELIMINARY DESIGN
11.PRELIMINARY DESIGN ELEVATIONS:
CREST OF RISER 402.00 ft
TOP OF DAM 404.50 ft
DESIGN HIGH WATER 403.50 ft
UPSTREAM TOE OF DAM 394.00 ft
BASIN SHAPE
12.LENGTH OF FLOW EFFECTIVE WIDTH:NORTH RUN
S URFACE AREA OF NORMAL POOL 7887 sf
LENGTH OF FLOW PATH 120 ft
EFFECTIVE WIDTH 60 ft
Page 1 78-59-SB4.xls
TEMPORARY SEDIMENT BASIN
PROJECT CASCADIA ''PROJ NO. 12.0065
BASIN# ' SEDIMENT BASIN SB-4 DATE 6/13/2014
LOCATION ' BY CWS
L/We 2.00
Baffles Not Required
RUNOFF
(RATIONAL METHOD CALCULATION)
USE MAXIMUM C VALUE DURING CONSTRUCTION AND MINIMUM Tc VALUE
13.FLOW FROM 2-YEAR STORM
C: 0.60
Tc: 18.0 I: 3.0 in/hr
Q= 28.1 cfs ;
14.FLOW FROM 25-YEAR STORM
C: 0.60
Tc: 18.0 I: 4.2 in/hr
Q= 39.3 cfs
PRINCIPAL SPILLWAY DESIGN
15.REQUIRED SPILLWAY CAPACITY:
EMERGENCY SPILLWAY?(Y/N) y
REQUIRED SPILLWAY CAPACITY: 28.1 CFS
16.ASSUMED AVAILABLE HEAD:
ELEV.OF CREST OF E.S.IF USED: 403.00
ASSUMED AVAILABLE HEAD=' 1.00 ft
.
17.RISER DIMENSIONS:
RISER DIAMETER: 36.00 (From Plate 3.14-8 or Calcs)
ACTUAL MAX.ELEV.: 403.50 ft (From Calcs if appropriate)
ACTUAL HEAD: 1.50 ft (From Plate 3.14-8 or Calcs)
18.BARREL LENGTH:
BARREL LENGTH: 34.00,ft
BARREL INVERT OUT: 398.00'ft
HEAD H ON BARREL: 5.50'ft (From Plate 3.14-7)
19.BARREL DIAMETER:
BARREL DIAMETER: '
24 in (From Plate 3.14A or 3.14B)
20.TRASH RACK AND ANTI-VORTEX DEVICE:
DIAMETER: 54 in (From Plate 3.14D)
HEIGHT: 17 in
EMERGENCY SPILLWAY DESIGN
21.REQUIRED SPILLWAY CAPACITY:
Qe=Q(25)-Qp= 11.2 CFS
22.DIMENSIONS:
BOTTOM WIDTH(b):: 16.00 ft (From Table 3.14-C) ■,
SLOPE OF EXIT CHANNEL(s): 0.04 ft/ft (From Table 3.14-C)
MIN.LENGTH EXIT CHANNEL(x): 33.00 ft (From Table 3.14-C)
ANTI-SEEP COLLAR DESIGN
23.DIMENSIONS: , .
DEPTH WATER @ CREST OF P.S.(Y): 8.00 ft
SLOPE UPSTREAM FACE DAM(Z): 2.00 :1
SLOPE P.S.BARREL(Sb): 2.13%
LENGTH BARREL IN SAT.ZONE(Ls): 50.00 ft (From Plate 3.14-11) •
24.NUMBER OF COLLARS:
NUMBER REQUIRED: 2 (From Plate 3.14-12)
DIMENSIONS:, 4.0,ft"2 (From Plate 3.14-12) •
FINAL DESIGN ELEVATIONS
25.ELEVATIONS:
TOP OF DAM: 404.50 ft
DESIGN HIGH WATER:I 403.50 ft
EMERGENCY SPILLWAY CREST: 403.00.ft
PRINCIPAL SPILLWAY CREST:' 402.00,ft
.
DEWATERING ORIFICE INVERT:' 398.60 ft
CLEANOUT ELEVATION:: 396.57 ft
Page 2 78-59-SB4.xls