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Home My WebLink AboutSW5240201_Plansheet - SCM Detail_20241014 Docusign Envelope ID: F03796C9-87EO-4CO8-955E-B4EOD2D5A4F1 VEGETATIVE SHELF 1.0" Water Quality Runoff Volume Calculation CA/? ' Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987) PLANTING PLAN LEGEND Where: Rv = Runoff Coefficient, in/in J1 I = Percent Impervious 1 52.8% = 3FF35St 1@944A... Rv= 0.05 + 0.009(1) Rv= 0.525 QUAIL SEDGE = 055961 1.0 inch runoff volume (Required) (CEREZ TENERA) % O F ,01- �., Runoff volume, S=(Design rainfall) (Rv) (Drainage Area) %,,tiR 10/11/2024 Design Rainfall = 1.0 inch WHITE TURTLEHEAD 1 6 1 111 0 `,,, Drainage Area = 25.05 acres Storage Required = 47,756 cu. ft. / (CHELONE GLABRA) _ - - , - / _ \82-- ,�/ �. qwl Volume • • • 1 • + r • r • (Provided) / Depth PPE SA (SF) Top 1" Pool SA (SF) Volume (CF) Elevation D p D JOE PYE WEED 93� _ Q / ` \ \ N, X /- �h ' i 1' / /I I I r r o 1.91 18,533 28,436 47,756 408.91 D p D (EUPAT' FISTULOSUS) CB 220 QO 80 \ /�%O _ \� ` I J / / / I 7 �` / c Size Water e • r • • • • \� - / - �o ' 79 _ +^� x l `4' BLACK VINYL /I / / ^� J - E - . . N Q ,-CdA 2 h 1/Z (Orifice Equation; Cd=0.60; h = Ho/3) / �' _ / J �` o _ �; l� PERIMETER i / / / / // ,f / = z 3.00 Orifice Diameter (inches) SEE SHEET C9.6 FOR SEEDING - y '` \� / t � � FENCE / / / / / � � � f CB 219 CB 203 48- WHITE . l 6, � SCHEDULE ) _ h I / / / / 1.79 Ho (Driving Head to Centroid of Orifice) (ft) - `GP /' TURTLEHEAD �o / / a FU ':.� CB 219A - . Fz _ , _ � � � 1 t / � / / / r o u� � � cn cn cn 0.60 Ho f 3 (Per orifice equation recommendation in NCDEQ SWM Design Manual, Part B) _ 15� -q ' 77_ _ // _ I / / / / / LU U 0 � � � 0.18 Q1.0" Drawdown Rate (cfs) _ �;` \ `/ ` \ I / / / / // / U. �° z 1-4 w w w } _ EMERGENCY I I / / / / w O o 00 z Planting Requirements '15' RCP SCM 1 47,756 Water Quality Volume (V ,3 , Dam Berm Non-Clumping Turf Grass / 6' - (WET POND) I''� SPILLWAY I / / / / s a x � � � � w � 0 � Vu / Ql" x 86,400 Drawdown Time (days) - _ / RC ,�. \ r I / / " +. oI � O O O 3.0 Drawdown Time (days) 2 -5 days) 6' Shelf Length 468 Area of Shelf= 2808 SF (50 Plants per 200 SF of Area) ZING GASKET)_ X / \ �,73+ \ ,�1 , v / / _j U) v > Quantity Type Root Common Name Scientific Name Planting Size Notes 1 / _ o i JOE PYE WEED I i / I Q a a a w w 0 w �Lu w Pond � . '. Elevationst s 75 36 RCP �x� �� r / � a' ,o � � O � 234 Herbaceous Container Quill Sedge CarexTenera 4"Pot 24" 36"OC I / 14 �\ i / I / / ,� -I o o O Q Q _ Q Pond Type Wet Pond ` y �.,` /� �_ 00 \� I t I I v, n z > � Q 234 Herbaceous Container White Turtlehead Chelone Glabra 4"Pot 24"-36"OC �_ , , ` , , M 0 � W Z 2 Z TSS Removal 85% J 74- - � - ` / �� 1 \ J i l I r � = E � L � Lu 234 Herbaceous Container Joe Pye Weed Eupat'Fistulosus 4"Pot 24"-36"OC \ I - FES 200 i '`��+50 3:1 ' I L In a Top of Pond / Berm 415.00ft , / _ �`� 0 18" MIN. ' / ` R� \/ I ~ o > Q ,• f / l- / h / / � O O 0 Secondary Spillway Width 20.00 ft /�� ,` 20' PRIVATE DI 201 ^�'X4` 02 CLASS B �' / / 7S SCM 1 - RISER (4' x 4')\/� J \ I M LU O' O O' z O' Bottom of Secondary Spillway 414.00 ft 7 DRAINAGE EASEMENT 2.1 RIPRAP / D Xp / 1 I Ln M w w w Top of Riser 413.00 ft (at least 1'Above TPE) J . _ �\, 1 - - I SCM 1 FES��\ I I � U w U U Riser Type/ Size 4x4 ft ,/ „ j / 6 - - 20 PRIVATE z a z w z =30 RCP / ` 0 0 2:1 � g'' I W W W 12+0 �` /� z / DRAINAGE Top of Water Quality 408.91 ft (1" Runoff) / `__ '� b 0 0 0 � 0 ,\2. 30 RCP +50 0 'o "S s EASEMENT I , w w w w w Top of Temp Pool Elev 413.00 ft GCB 103 (O-RING GASKL .)� , 11 405 p,1 / O i _ \ � U) To of Veg. Shelf 408.00 ft r� l a 9+50' ry �_�- D z z z } z p g Top of Riser _ 30"RL10+0p- �y10+50. O FES 100 - 41p i , v�, \I \ I �\r I 0 O O O Q O Permanent Pool Elevation (Normal Pool) 407.00 ft - J - - - / z - �, v) cn cn cn 413.00 ft Temp Pool Elev: 413.00 ft r - - sX I 0 ----------------- r 41 -< - - -_\- 1 Water Quality Orifice Elevation & Size 407.00 ft 3.00 in ------------- _ - ,5 _ - -1 - - i,z6X ,- - - _ _ _ > > > > z > ti 10 BERM- \ z Secondary Orifice Elevation & Size (Dia.) n/aft 4-15 -�� T _ 10' BERM, 30 PERIMETER �y6 / � W vai W ^Dia. DI 101 (0-RING GASKET) ^ \ - - �// , SETBACK EASEMENT19 o Bottom of Veg. Shelf 407.00 ft ` o - _ �'? % o 0 0 0 0 _ _ _ _ �y� N N N N N 1 Yr Water Surf Elev: 409.11 ft _ cry- QUILL SEDGE I / w w N N N N N Top of Sediment Storage f Pond Bottom 402.00 ft _____________. - _ \ �H,,e _ \ \ _ , _ / , I / , S / / , �/ = a Ln -- -- -- --- Bottom of Sediment Storage 401.00 ft (Min 1 ft) 20' PUBLIC ACCESS AND `� _ �� _ / I \\ / ' U o � � 0 0 � Invert Out of Riser 403.80 ft _ \` '�� \ / ' / � 0 0 0 0 0 Perm Pool 407.00 ft � \ - MAINTENANCE EASEMENT. Outlet Pipe Size 24.00 in Diameter RCP I Yo�c �� `� `�\ �d�o� _ \ _ dyo� I �' �� , / DATE Outlet Pipe Length & Slope 78.00 ft 0.50 % 0 /o _ \ _ �.� � � � 05/20/2024 Downstream Outlet Elevation 403.41 ft 4.00 ft �_ ,�`'�, 1 Yr Water Surface Elev f Peak Flow (CFS) 409.11 ft 0.33 CFS 5.00 ft � '=� _ ` sr� ` �� '` I / ' / _ �.��-�" 1 O DRAWN BY 10 Yr Water Surface Elev Peak Flow (CFS) 412.86 ft 0.57 CFS ---- j- a 25 Yr Water Surface Elev Peak Flow (CFS) 413.14 ft 3.55 CFS - - - - -- - 24" RCP @ 0.50% 331 100 Yr Water Surface Elev Peak Flow (CFS) 413.51 ft 20.31 CFS 3.00 inch 0 Invert Out: 0.50% ft £8 ab'N • r Water Quality SCM 1 PLAN DESIGNED BY Orifice ; Fill With Concrete ; ; SCALE 1"=50' • 331 Top of Riser: 413.00 3 in WQ Orifice Elev ; ; ; SCALE: 1" = 50' • 407.00 ft As Necessary Top of WQ Pool: 408.91 407.00 10' Berm 415.00 , {� ________________ 401.5a ft 0 50' 100' • CHECKED BY 100 Yr 413.51 ; Precast Extended Base ; • 331 0.50 ft 401.00 ft Spillway 414.00 � ------------------- � SCALE 25 Yr 413.14 H: 1" = 50' 10 Yr 412.86 2.00 ft �r �►' 2.00 ft V: 1" = 5' ------------- --- !- ------ ----- 1 Yr 409.11 PRECAST' CONICRETE RISER Pond Bottom 4 ft x 4 ft x 12 ft Tall, With a 0.5 ft Thick Precast � 402.00 Extended Base DI 101 O-RING GASKET SCM 1 - RISER (4'x 4') • ( ) TOP 413.00 See Plan for TOP 413.63 INV IN 407.00 (FIR WQ DRAWDOWN) accurate outlet design INV IN 408.01 (FIR CB 103 (O-RING GASKET)) INV OUT 403.81 (TO SCM 1 FES) INV OUT 407.91 (TO FES 100) TOP OF BERM Inv Out: . 403.41 420 ELEV: 415.00' 420 ' PROPOSED GRADE EXISTII{JG GRADE En EMERGENCY SPILLWAY Perm Pool Sediment Bottom - Invert Out: 403.80 78 LF of 24" RCP @ FES 100 I ELEV: 14.00' 407.00 401.00 Base: 401.00 0.50% TOP 409.79 415 INV IN 407.00 (FIR 101-100) TRASH RACK 415 fn : • • • w Riser Dimensions Weight of Structure Displaced Volume 100 YyEV:413.51 G, SEE SHEET C6.1 FOR CONCRETE 25 YYR ELEV: 413.14 CRADLE, FILTER DIA HRAGM, En Outside Width 5.00 ft Walls = 16,200 LBS V = LxWx(HT) = C.F. Z Inside Width 4.00 ft Base = 6,075 LBS 10 ELEV: 412.86 AND DAM EMBANKM NT JCL / M SPECIFICATIONS O M Outside Length 5.00 ft FILL = 5,520 Ibs Displaced Water= 410 - - _ r 2' MIN 410 LU a Inside Length 4.00 ft C.F. * 62.4 PCF = LBS 6:1 VEG. SHELF Q 0 1 YR ELEV: 409.11' U J ° Height 12.00 ft Outlet Pipe = 236 LBS J SCM 1 FES = H ° WQV ELEV: 408.91' TOP 405.66 Base Thick (ft) 0.50 ft WQ Orifice 4 LBS Add 15/° Factor of Safety 88 LF � INV IN 403.41 (FIR SCM 1 - RISER (4'x 4')) ° Wall Thick' (ft) 0.50 ft 30" RCP PERMANENT POOL ELEV: 407.0 ' O O Ex Base (ft) 2.00 ft Weir#1 = 0 LBS V = 313 C.F. 405 @ 0.55% 165 LF N 3"WQ ORIFICE 405 zEn Areas removed from Riser Weir#2 = 0 LBS Disp. Water= 19,500 LBS 30" O-RING GASKETED - 12 ELEV: 407.00 Outlet Pipe 3.14 ft Weir#3 = 0 LBS 15% F.S. = 2,925 LBS RCP06 z WQ Orifice 0.05 ft Weir#4 = 0 LBS @ 0.55% LL � Orifice #1 0.00 ft Other#1 = 0 LBS Safety Factor 1.23 VELOCITY DISSIPATO PAD BOTTOM POND ELEV: 402.00' OU z Orifice #2 0.00 ft SEE SHEET C4.3 FOR DETAIL SEDIMENT BOTTOM ELEV: 401.00 Q 3 M Orifice #3 0.00 ft Weight= 27,556 LBS Weight= 22,425 LBS 400 400 J J Orifice #4 0.00 ft Precast Concrete Riser Structure to be 4 ft x 4 ft x 12 ft Tall, With a 0.5 ft Thick Precast VELOCITY DISSIPATOR PAD Y a Z) Other 0.00 ft Extended Base SEDIM NT BOTTOM @ ENTRANCE E EV: 400.00' SEE SHEET C4.3 FOR DETAIL W Q ° a41BASE ELEV: 4 1.00 78 LF c� EDIMENT BOTTOM @ EXIT E EV: 401.00' a FILL W/30 0 PSI 24" O- ING GASKETED RCP °7 z 6 OTTOM FOREBAY @ ENTRANCE ELEV: 401.00' CONCRETE TO 4 3.80' @ 0.51% w 2i EL 395 BOTTOM FOREBAY @ EXIT ELEV: 402.00" 395 J U = - - - - � > a 0 100 Yr Flow in Spillway 0.00 cfs 4:1 Side Slopes 18" THICK MIN. 6' IDE 0 0 10 Yr Flow in Spillway 0.00 cfs 28 ft CLASS B RIP RAP, SEE z a o o Top of Pond 415.00 20 ft SHEET C6.1 FORD TAIL Z) o ----------------- ----------- ----------L----- U i L m 1.00 ft 1.49 ft 390 390 } z m ----------- N 100 Yr Water Surf Elev: 413.51 ft ---------------- 10 Yr Water Surf Elev: 412.86 ft -- -- o a, oo N o N co co rn N 0.00 ft � � OM OM � - � N � cD � � � � � � N_ OM O 0 0 O O O O O O U -5 U, Spillway Elevation 414.00 ft a Spillway Liner to be either Class A Riprap, NAG P550 or approved equal. SPILLWAY DETAIL Q 3 Q 0 9+00 10+00 11+00 12+00 13+00 14+00 15+00 16+00 17+00 Ln In '- Y SCM 1 PROFILE U U HORIZ SCALE: 1"=50' 2 o VERT SCALE: 1"=5 ° a � a M � � U_ M In � 6 0 2 Lu 0 50 i- U PROFILE SCALE JOB No. Ln a Know whaft belOW. 54 94 9 WITH AALL LL TOWN OF YOUNGSVINSTRUCTION TO BE IN LLE,OFRANKLIN 9 SHEET NO. m a Call �B'�DI"� [l[�I RDANCE `"� U COUNTY, NCDEQ AND NCDOT STANDARDS, =' SPECIFICATIONS, AND DETAILS C6,0 EnLD L