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Home My WebLink About20151152 Ver 1_4.4 BMP-1 WETPOND_20151119co v w a Iq N 0 N E v a z 0 a 3 a ca m 0 / Z Z a 0 Z 0 U Z 0 U 0 Q U 0 0 Z Ln 0 i 0 0 i i Y \ t t t t t\ t t t t x,�o + + \+ FES 50 \+ \ 4- + + + + IF + ` L + + + + —� + + -- 36 360` �— \ \ + f�/ I \ UTB J /17 � / / 4 RAU OA \ I + d 1 ILTEFR STRIP 1 361 0NCRETE LEVEL _ ,370 364 365 — — \ / / CHAIN LINK__ / ! Q I 1 /� �� 1 365 364 EEP / i ✓ 26 DEL CB 5 — , - \ \ 1 375 A�DRAIN TYPrCAL — 'J F / 9BMAL / / // / FLOW TO LEVEL SPREADER 1/4" OPENING GALVANIZED WIRE MESH STAINLESS STEEL PIPE CLAMP a- o- w _J l� M LEVEL SPREADER DISCHARGE SCREEN COMBINED LEVEL SPREADER, BYPASS, AND FILTER STRIP LEVEL SPREADER FILTER STRIP CONSTRUCTION SEQUENCE 1) Grade the site to the design slope using a box blade or similar equipment. Care should be token to avoid driving heavy equipment through the Engineered Filter Strip to prevent compaction. After the Filter Strip is graded, then proceed with constructing the blind swale and level spreader. 2) Construct the blind swale and level spreader. The LS should be constructed on undisturbed soil whenever possible. If the use of fill is unavoidable, compact the soil to 95% of standard proctor test prior to construction. Level spender should be check at 4 ft encrements to ensure level construction. 3) install underdrain per plan 4) place soil around level spreader to achieve final grade and install sod. 5) install forebay if shown. 6) filter strip soil must be left loose. Rake soil to loosen soil to a depth of 6" below top soil and sod. 7) install top soil and incorporate lime and fertilizer using rototiller or simulor method. 8) Before planting, water the area to enhance settling. Fill areas that settle unevenly to avoid standing water. 9) Follow these steps to install the sod in on Engineered Filter Strip (NCSU Cooperative Extension Service 2008): a. Make sure the soil is moist (but not overly wet) before toying sod. Irrigating the soil several days before delivery is often adequate. b. Install the sod within 24 hours of delivery. Plan to unstack and unroll the sod if it cannot be laid within 48 hours. c. While installing, keep sod in the shade to lessen the chance of heat buildup. d. Start sodding from a straight edge (driveway or sidewalk), and butt strips together, staggering them in a bricklike pattern (See Figure 5). e. Avoid stretching sod. Use a knife or sharp spode for trimming to fit irregularly shaped areas. RETAINING Ir_ WALL FE s 1� \\ 1/2"X4" WEDGE OR EPDXY T%A/n Ulkirrc %eiri nrn Tn Di ATE' 1/2"X 4" WEDGE OR EPDXY J/ 13"0 CLASS 1 STONE /22" THICKNESS Ll -1- - 1II- 1II- 1II ='' I FILTER FABRIC PROPOSED LENGTH 10' GRADE SPILLWAY FRONT VIEW PRIMARY EMERGENCY SPILLWAY SPILLWAY TOP DAM SEE DETAIL it 1 /F EMBANKMENT FILL TO BE COMPACTED TO 95% STANDARD PROCTOR PER ASTM D -698 INV OUT \ FES RIP RAP DISSIPATER AT OUTLET UNDERLAY WITH MIRAFI 600 SEE EROSION CONTROL SHEET FOR DIMENSIONS 6" GATE NOTE: DIMENSIONS ARE INSIDE DIMENSIONS MANHOLE STEPS GROUT INSIDE OF STRUCTURE AT ALL OPENING WITH NON SHRINK GROUT REBAR TRASH RACK NOTES: 1. ALL REBAR TO BE #4 REBAI 2. ALL REBAR AND ANGLES T, BE HOT DIP GALVANIZED PER ASTM A153. 3. WATER STOP PER WATER STOP -RX OR EQUIVALENT. f. Lay sod lengthwise across the face of slopes, and peg or stake the pieces to prevent slippage. 1/2 WIDTH TOP VIEW TRASH RACK DETAIL g. After the sod has been placed, roll the lawn to ensure good sod -to -soil contact. Then begin watering. FILTER STRIP FERTILIZER GUIDELINES Apply the following for grosses other than FILTER STRIP SOD GUIDELINES centipede-: Region Appropriate Grasses LA •75 Ibs of ground limestone per 1,000 sq ft. Mountains Blue Gross, Tall Fescue 3' #57 STONE •A starter type fertilizer (one that is high in 3' BLIND SWALE Piedmont Toll Fescue, Common Bermuda II 1 3" THK 30' LEVEL SPREADER -I phosphorus) based on the type of grass and Coastal Plain Centipede, Common Bermuda the planting method. Fertilizer bogs hove a 9 three – number system indicating the primary 6" / / Sod is to be grown in non - clayey soils or washed sod. nutrients, such as 8 -8 -8 or 5- 10 -10. These numbers denote the N -P -K ratio —the Sod is to be watered twice per week for the first three percentage of each nutrient in a fertilizer. The weeks after construction. percentages are noted in the following order: The total sod toyer should be kep moist during N Nitrogen for green color and growth. the first three weeks. ' SOD P205 Phosphorus for good rooting. 2' 6" TOP SOIL K20 Potassium to enhance pest and SOD environmental stress tolerance. 6" LOOSE SOIL Common examples of starter fertilizers required 6" TOP SOIL (LOOSE) FILTER FABRIC for a 1,000 sq ft area include 40 Ibs of 5- 10 -10, 20 Ibs of 10- 20 -20, or 16 Ibs of 18 -24 -6. For sandy soils, typical to the Coastal Plain and Sondhills, *PERFORATED UNDER BLIND SWALE ONLY, fertilizer rates should be increased by 20 percent. SLOPE TO DAYLIGHT AS SHOWN ON PLAN STANDARD LEVEL SPREADER (CROSS SECTION A -A) • For centipede gross, apply lb of nitrogen per 1,000 square feet. Too much fertilizer will kill centipede. C. Designer Scale Drawn By Date 6/11/2015 Checked By Job No. ASHBOURNE SUBDIVISION Cary Wake County North Carolina 3 1 ANTI -SEEP COLLAR PER DETAIL 3 �1 PER PLAN TOP VIEW CONCRETE COLLAR FRONT ELEVATION CONCRETE . COLLAR $„ 12„ v . �. . . 4 12" a a KE A �i ORIFICE POND DAM & RISER WETPOND WQ VOLUME 25,640 CUFT ;EMBLY DRAWDOWN ORIFICE FACING MICRO POOL P FOREBAY DRAIN SEE DETAIL 4" OF TOPSOIL (MIN.) AQUATIC SHELF TO BE PLANTED MICRO POOL FOREBAY EL. PER PLAN GALVANIZED GUIDE SUPPORT WITH TWO ANCHORS PRECAST CONCRETE JOINTS SEALED AND FASTENED TOGETHER VALVE ACTIVATOR STEM OUTFALL TO RIP RAP DISSIPATOR (SEE PLAN VIEW FOR ORIENTATION) TOP RISER EL. 363.10' 3" DIA INV. 362.3 DRAW DOWN ORIFICE NORMAL POOL (NP) 4" DIA INV EL. 361.0 OUTFALL TO LEVEL SPREADER WITH RESTRICTION PLATE (SEE PLAN VIEW FOR ORIENTATION) OUTFALL EL. INV 359.6 s^ 6" GATE VALVE 1 RISER BTM EL. 359.3' 4" KEYW Q GROUT AROUND KEYWAY v PND BTM EL. 358.0' WITH NON SHRINK GROUT • • 4 . . . . Q . .p. . . . . . . 2' d a #4 BARS 8" OC BOTH p TRANSVERSE AND LONGITUDINAL p ELEVATION VIEW CMU WALL PER RISER SECTION 4 -1/2" RODS EPDXY TO BLOCK BENT AND TIED TO REBAR WATER STOP OUTFACE PIPES) #4 REBAR GROUT AROUND CONNECTIONS AND PIPE WITH NON SHRINK GROUT WEIR TOP VARIES SEE PLAN v d 2. v ELEVATION VIEW PIPE OUTFALL WALL ALVANIZED Outflow(cfs) Elevotion(ft) Q 2 -year 5.21 363.22 Q 5 -year 20.8 363.6 Q 10 -year 29.4 364.0 Q 25 -yeor 40.7 364.4 Q 100 -yeor 59.8 364.8 DRAWDOWN ORIFICE FACING MICRO POOL P FOREBAY DRAIN SEE DETAIL 4" OF TOPSOIL (MIN.) AQUATIC SHELF TO BE PLANTED MICRO POOL FOREBAY EL. PER PLAN GALVANIZED GUIDE SUPPORT WITH TWO ANCHORS PRECAST CONCRETE JOINTS SEALED AND FASTENED TOGETHER VALVE ACTIVATOR STEM OUTFALL TO RIP RAP DISSIPATOR (SEE PLAN VIEW FOR ORIENTATION) TOP RISER EL. 363.10' 3" DIA INV. 362.3 DRAW DOWN ORIFICE NORMAL POOL (NP) 4" DIA INV EL. 361.0 OUTFALL TO LEVEL SPREADER WITH RESTRICTION PLATE (SEE PLAN VIEW FOR ORIENTATION) OUTFALL EL. INV 359.6 s^ 6" GATE VALVE 1 RISER BTM EL. 359.3' 4" KEYW Q GROUT AROUND KEYWAY v PND BTM EL. 358.0' WITH NON SHRINK GROUT • • 4 . . . . Q . .p. . . . . . . 2' d a #4 BARS 8" OC BOTH p TRANSVERSE AND LONGITUDINAL p ELEVATION VIEW CMU WALL PER RISER SECTION 4 -1/2" RODS EPDXY TO BLOCK BENT AND TIED TO REBAR WATER STOP OUTFACE PIPES) #4 REBAR GROUT AROUND CONNECTIONS AND PIPE WITH NON SHRINK GROUT WEIR TOP VARIES SEE PLAN v d 2. v ELEVATION VIEW PIPE OUTFALL WALL BMP -1 WETPOND DETAIL A 6" PVC SCREW PLUG AT SECONDARY ORIFICE ELEV. 8.. 4" PVC CAP WITH HOLED HOLE SIZE 2.5" 6" PVC STUBBE INTO BOX 6" GATE VAL GATE VALVE DRAIN TRASH RACK SPACING RE MESH 0 -RING GASKET PER ASTM C433 SEALANT BANDING PER ASTM C877 TYPE 1 EXTERNAL WRAP AT RCP OUTFALL AT JOINT (N.T.S.) 1' MIN. T 1' MIN v 1.5' h I -WATER OP BMP SIDE ° I CONCRETE ANTI - SEEP COLLAR ANTI -SEEP COLLAR CONCRETE /DIP PIPE AT JOINT N.T.S. ALVANIZED PRELIMINARY — NORMAL POOL (NP) \ \� 2- i "GALV WEDGE "�I NOT FOR 6" BELOW NP CONSTRUCTION �,•.e �6/11/15� :�- WITH ^/E P♦ 2-1/2" SLOTS g" ' � 12" BELOW NP 4" OUTFALL ': r o • oo #57 00 o0 o STONE \/� 0 ROT T 0 FOREBAY 6" PVC 6" PERFORATED PVC FOREBAY DRAIN DETAIL BMP -1 WETPOND DETAIL A 6" PVC SCREW PLUG AT SECONDARY ORIFICE ELEV. 8.. 4" PVC CAP WITH HOLED HOLE SIZE 2.5" 6" PVC STUBBE INTO BOX 6" GATE VAL GATE VALVE DRAIN TRASH RACK SPACING RE MESH 0 -RING GASKET PER ASTM C433 SEALANT BANDING PER ASTM C877 TYPE 1 EXTERNAL WRAP AT RCP OUTFALL AT JOINT (N.T.S.) 1' MIN. T 1' MIN v 1.5' h I -WATER OP BMP SIDE ° I CONCRETE ANTI - SEEP COLLAR ANTI -SEEP COLLAR CONCRETE /DIP PIPE AT JOINT N.T.S. ALVANIZED PRELIMINARY — " THK PLATE 2- i "GALV WEDGE "�I NOT FOR ANCHORS 110 CONSTRUCTION �,•.e �6/11/15� :�- WITH ^/E P♦ 2-1/2" SLOTS g" � 2.. 4" OUTFALL r OUTFALL TO LEVEL SPREADER FLOW RESTRICTION PLATE ♦ CARS PRELIMINARY — Cary Project Number 15 -SB -008 Cary HTE Number 15 -1463 NOT FOR pp y own o Cary Approved b the Town C CONSTRUCTION �,•.e �6/11/15� :�- Development Review Committee ^/E P♦ Planner Date WITHERS RAVEN EL ENGINEERS I PLANNERS I SURVEYORS 111 MacKenan Drive Cary, North Carolina 27511 tel: 919 - 469 -3340 www.withersravenel.com License No. C -0832 Sheet No. 4.4