SW5230802_Plansheet - Grading/Drainage Plan_20240612 (2)

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- I SWALE LINER/NETTING DETAILS ...........
F w II Nettingand Synthetic Liner Installation v P4 '• 'o"o ° H/ F�°>o
Temporary Liner(Straw Mulch held in place with Plastic of Jute Netting) Roll out strips of netting parallel �` _ o
to the direction of the flow J •:CD
?, 1. Start the laying of net from the top of the upstream end of the channel and w u? _
I i4" unroll it downgrade. Do NOT stretch netting. .L ,,
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-' 2. Bury the upslope end and staple the net every 12" across the top end,every • �.' C
U stream end 1 °°°, 0
' PIPE 1.18"DIA. - 3 feet around the edges and across the net so that the straw is held closely • d'd L1Sr` - p 3 3 �w
'S 103950 SF DRAINAGE AREA. III I I against the soil. Do NOT stretch the netting when stapling. 0 ' °°
(11260 SF IMPERVIOUS) ` �' I �I I I- 3. Netting strips should be joined together along the sides with a 3"overlap !41
I-III=
=i and stapled together.
III-� 4. To join ends of strips,insert the new roll of net in a trench as with upslope
4�t =III_ end and overlapit 1-8"with the previously laid upper roll. Turn under 6' of
i I W I=I I the 18 overlap and staple every 12 across the end.
Liner/Netting Maintenance Considerations
Anchor nettin m a 6"trench 1. Inspect Liner and Netting (RECP) at least weakly and after each significant(1/2 inch or greater)
rain fall event. Make any necessary repairs immediately.
2. Good contact with the ground must be maintained, and erosion must not occur beneath the RECP. l�
3. Any areas of the Liner and Netting that are damaged or not in close contact with the ground shall be repaired and stapled. z
4. If erosion occurs due to poorly controlled drainage, the problem shall be fixed and the eroded area protected. W
l • _ _ - ' I III �T=��l�ll�IlWI1� �1 7TT-I� I U
round I11 rrii S. Monitor and repair the Liner and Netting as necessary until ground cover is established.
Downstream end
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Join stn s b anchorm and overlapping
USGS MAP 1 =300' z
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WaterShed Area s ft. Flow Rate cfs Temp. Stabilization U
q• C Minimum
t (min) V ft/sec Shear Allowable V ft/sec Depth , ft Swale Side Bottom
(average) Slope, ft/ft 2 Stress, Shear 10 ' 10 Slope Width,
Swale # Total Q2 Q10 Q25 (Unlined) Ib/ft3 Stres3s, (vegetated) Depth, ft. (H.V) ft O
Ib/ft �n
1 1280 0.59 5 0.1 0.13 0.14 0.125 3.50 1.25 1 .45 1 .15 0.18 0.68 4:1 0
1 A 4,580 0.51 5 0.32 0.41 0.44 0.077 3.60 1 .15 1 .45 1 .14 0.30 0.80 4:1 0
//7 2 115,730 0.43 5 6.83 8.66 9.48 0.05 4.49 0.90 1.45 2.15 0.35 0.85 5:1 10
3 128,247 0.44 5 7.75 9.82 10.75 0.05 4.09 0.87 1.45 1 .53 0.38 0.88 2 :1 10 Z
4 9,500 0.67 5 0.87 1 .11 1 .21 0.025 2.44 0.47 1 .45 0.47 0.50 1 .00 10:1 0 O >_
4A 10,500 0.64 5 0_92 1 .17 1 .28 0.05 3.89 1 .19 1 .45 0.78 0.56 1 .06 5:1 0 w
5 7,000 0.77 5 0.74 0.94 1 .03 0.05 3.08 0.78 1 .45 0.62 0.39 0.89 10:1 0 Q U
5A 8,010 0.72 5 0.79 1 .00 1 .10 0.05 3.56 0.97 1.45 0.83 0.46 0.96 6:1 0 1 w
6 7,450 0.83 5 0.85 1 .08 1 .18 0.05 3.21 0.81 1 .45 0.74 0.39 0.89 10:1 0
6A 9,470 0.72 5 0.94 1 .19 1 .30 0.033 3.00 0.66 1 .45 0.68 0.47 0.97 8:1 0 Q Z w
SB1 23,700 0.53 5 1 .72 2.19 2.39 0.01 2.74 0.45 1 .45 0.93 0.89 1 .39 3:1 0 = Q LLi
Z SB2 618 0.35 5 0.03 0.04 0.04 0.02 1 .29 0.19 1.45 0.25 0.24 0.74 3:1 0 `w Z
Q = Q
1 = O �
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BOTTOM WIDTH Q U U
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Fgrury 2: Cr _S Qctian of an L;S•FS > � o Q0 00 N
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Z 0 0C z
F 1ft Ift 30 WU ! ;
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DRY DETENTION BASIN OULET DETAILS W Q z
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,.1 1, ., Cap to Prevent Trash/Debris C Z O Cd
I e*d Fe ad e r from Clogging Riser Z W a Q
25-Year(616.04') ♦ Top of Berm El.617.00 � N W
BERMUDA SOD -------------------------
r Alt rSlap8" Dia. PVC Riser _ 10=Years 15.6�--� --- - - 1 r 10 YEAR,24-HRRAINEVENTCALCULATIONS U � O 7
}ice - � ^kd - ---- - _
�~ 6 DEEP Invert El. 615.00' AKFLPRE-DEV POST-DEV PRE-DEV POST-DEV W
PEAK FLOW PEAK FLOW RUNOFF VOL. RUNOFF VOL. L/ J
_ _ _ 2-Year____ (614_45') v_ (CFS) (CFs) (AC-Fr) (AC-FT) W � r3
3" PVC Drawdown Orifice. 15.62 5.35 1.149 1.138
Invert E I. 612.00' � NOTE:DRAINAGE AREA MAPS AND CALCULATIONS PROVIDED Z
4" Perfor ted CPP t0. WITH STORMWATER EVALUATION NARRATIVE. v��J
}y F Prevent logging of
`
•� - I Drawdown Orifice
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Base El. 612.00' '° ° Invert El.612.00 30'Lon 6" Dia. PVC Pies=0.01 ft/ft W [�]
NON-WOVEN GEOSYNTHETIC FILTER FABRIC ),� p Invert El. 611.70
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WALL"
3 HT. #4 REBAR ELLS 12n OC. (6n ELL),
r WL '1 #4 REBAR EVERY V HORIZONTALLY. w
FOOTING: 8" THICK, 3'-6"WIDE, #4 REBAR 12" OC BOTH WAYS -III- 1.5' x 1.5' x 1' High Conc. Anti-Flotation Block Q ^^�
COMPACTED SUBGRADE ALL REBAR 2" MIN. CLEAR FROM EDGES OF 3000 PSI CONCRETE SMALL PERMANENT POOL
FILLED WITH NO. 57 STONE �
TO REDUCE CLOGGING OF
THE DRAWDOWN ORIFICE
AMC • e�t`4E 40' LONG X 1'WIDE CONCRETE LEVEL SPREADER,
(TOP ELEVATION 614.0), 3'WIDE GRAVEL STRIP, &
40'WIDE X 30' LONG SOD AREA
Please note that thlb Is not a state Please note that th/s /s not a state
requ#vd ", and is only b&479 bsta/led to r+sulrod ", and is only be ft beft led to
meet local .*rlsdktlan (Town of SVer Clty) meet local .*itsdktlon (Town of Sler City)
regU#VMdnts requkeomdnts