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Home My WebLink AboutSW4231202_Plansheet - SCM Detail_20240311 (2) POND N SPECT 0N1 MAN TEN Ail CE SCHEDULE 3Do = 3(1.5') = 4.5' 3Do = 3(1.25') = 3.75' 3Do = 3(2.5') = 7.5' ( AS SHOWN IN OPERATION AND MAINTENANCE AGREEMENT 30 3 3 W = 1.5'+15'=16.5' w = 1.25'+8'=9.25' w = 2.5'+16'=18.5' 0 0 jslj�Inspection activities shall be performed as follows. Any problems that are found shall outlet W = D + L Outlet W = D + L Outlet W = D + L o a 90,1 " o a g - o a 9 - pipe I; pipe I, i a pipe be repaired immediately. diameter(Do) ( ( t diameter (Do) F j diameter (Do) La - 8o I ° La -� 80 I La --.1 80 , T ilwater < 0.5Do ;_ , T ilwater < 0.5Do , T ilwater < 0.5Do Potential problem: How I will remediate the problem: ' . ��,a�� BMP element: - - The entire BMP Trash/debris is resent. Remove the trash/debris. La = 15' ><P�`°60 _ C La = 8' t P�`° VT60Ilk C La = 16' r Pit°6o C o „ �, o „ q o ergtir - The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary toti. „ �,��- detention basin erosive gullies have formed. remove the gully, and then plant a 5 �� 5 6 a' � 5 I o =1 , USE La = 15' a Ni' a - _ �, a USE La = 8' a ! a - _ �, a USE La = 16' a _ F a - op a ground cover and water until it is +__ I� I I f 1 II �� Wq l + I -' I + I &11 q - A --established. Provide hme and a4 - 3 Z d 3 2 d , 3 one-time fertilizer application. 20 �5 rd -- 3 20 �5 �d -- 3 20 �5 �d -- 3 Vegetation is too short or too Maintain vegetation at a height of z i OWN I long. approximately six inches. to " to _ " a to rr i II C - - � I I { ° BMP element: Potential problem: How I will remediate the problem: -- 0 _ 0 _ " 4 f CL The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the Q la a'' afflLrIXIVIIIIII . a 'a a,, aCU � v =,I, I v- II,N � Illf �i.,, 1 lilt Ni ,, = II N,, swale sediment off-site. _ - - 11111HIRHr =p - =p LO =zo - -0 " " The pipe is cracked or Replace the pipe. v- ,5- - 15 a ! v- is ! - II - Ili I 6 II : I V I 1 III: I 1 II. �� : -I � 1 10' d I - 10 d it - 10 d I : v v I � I ' - .I I - I otherwise damaged. - 1] I I' _ _ V S I� i 'i I I' V 5 .I ,i I I' V 5 .I I I . Erosion is occurring in the Regrade the swale if necessary to "I77 '' 0 s 5 o zo 50 lo0 200 5 ° s 5 to zo 50 loo tool ° 3 5 10 20 50 100 200 500 1000 00 1000 500 1000 swale. smooth it over and provide erosion Discharge(ft3/sec) d50 = 0.5' (6") Discharge(ft3/sec) d50 = 0.251 (311) Discharge(ft3/sec) d50 = 0.51 (611) Control devices such as reinforced USE CLASS B RIP RAP (00 = 8") USE CLASS B RIP RAP (00 = 8") USE CLASS B RIP RAP (00 = 8") turf mattingor ri ra to avoid CLASS B: dMAX = 12" Curves may not be extrapolated. CLASS B: dMAX = 12 Curves may not be extrapolated. CLASS B: dMAX = 12" rip rap Curves may not be extrapolated. " " L� Y P THICKNESS = 1.5(12 ) = 18 Y P THICKNESS = 1.5(12 ) = 18 Y P THICKNESS = 1.5(12 ) = 18 future problems With erosion. Figure 8.06a Design of outlet protection protection from a round pipe flowing full,minimum tailwater condition(TW<0.5 diameter). Figure 8.06a Design of outlet protection protection from a round pipe flowing full,minimum tailwater condition(TW<0.5 diameter). Figure 8.06a Design of outlet protection protection from a round pipe flowing full,minimum tailwater condition(Tw<0.5 diameter). The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if RIP-RAP PAD AT 18" BARREL RIP-RAP PAD AT FES #38 RIP-RAP PAD AT FES #45 original design depth for possible. Remove the sediment and BARREL FLOW = 15.58 CFS @ WS EL: 750.00, Do = 18" (15) DESIGN FLOW = 2.51 CFS, Do = 15" (1.25') DESIGN FLOW = 16.73 CFS, Do = 30" (25) sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion 9 protection such as reinforced turf 1 B9 (S9 16 matting or riprap if needed to prevent future erosion problems. T Ln L_B Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant CLASS B CLASS B CLASS B 9 9 � 16 . 5 B ' 9 9 � 9 . S B ' 9 9 � 1 8 . B ' health. 1 8 CAP , R PRAP 1 B RCP , R PRAP GO RCP , R PRAP Plants are dead, diseased or Determine the source of the 18 9 T H C K 18 9 T H C K 18 " T H C K dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than s ra in . R P - RAP PAD La R P - RAP PAD La R P - RAP PAD @ The main treatment area Sediment has accumulated to Search for the source of the (� a depth greater than the sediment and remedy the problem if 18 9 9 BARREL DETNL FES G 8 FES 4 B original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them La No invasive plants cover 50% of with pesticide (do not spray). OUTLET PROTECT ON the basin surface. W, BMP element: Potentialproblem: How I will remediate theproblem: E E S # SIZE E L0 W(c f s ) La (f t) W, W2 Thickness (ft) RP - RAP The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. CLASS B 18 " 18 15 . 58 1 5 ' 4. 5 ' 16 . 5 ' 18 " CLASS B PROJECT TITLE: Evidence of muskrat or Use traps to remove muskrats and W BARRELTHE TOWNES AT BERMUDA RUN beaver activity is present. consult a professional to remove PIPE R P RAP 2 Q PHASE 1 38 15 " 2 . 51 8 ' 3 . 7 5 ' 9 . 2 5 ' 18 " CLASS B DAVIE COUNTY FARMINGTON TOWNSHIP beavers. BERMUDA RUN,NORTH CAROLINA 4 5 3 0 " 1 6 . 7 3 1 6 ' 7 . 5 ' 1 8 . 5 ' 1 8 " CLASS B OWNER/DEVELOPER A tree has started to ow on Consult a dam safe specialist to 249 DE REALTY, Y grow safety p 249 DEARDOM WAY the embankment. remove the tree. CHAPEL HILL, NC 27516 336-707-9799 An annual inspection by an Make all needed repairs. �,�N CA/ appropriate professional +� vans �, F_Ssi shows that the embankment D E TA OUTLET P R O T E C T O G E O T E X T E E E N E R T O B E + ngineering, Inc Since 1974 � needs repair. if applicable) I Engineers Surveyors PlannersPlanners035014; , STA E D UNDERNEATH '��: -"-24 ' The outlet device Clogging has occurred. Clean out the outlet device. Dispose4609 Dunda$Drive Gree- -,NO 27407 pC4 . 1Y ,NCINE. SEE PPE CHART 0 SHEET ��®��33 FIRM LICENSE �0168 g�.$$�� , �,.�, of the sediment off-site. �' k A. Fti# 1FIIIItMi II.IIOSN9S#O-®Ile$ R PRAP PAD PROJECT: 7fi3-30 DESIGN BY DF DRAWN BY OF �� ♦ The outlet device is damaged Repair or replace the outlet device. E 0 R STORM PPE D E D G N FLOWS SHE T DE Proj DESCRIPTION: ul Al:em,9.rmuEe Run,Orewings,PM1es.I\BermuEa Run Conalru�on ROn9 3.0_Wn ersM.E 4.O.Ew SHEET DESCRIPTION: The receiving water Erosion or other signs of Contact the local NC Division of WET DETENTION damage have occurred at the Water Quality Regional Office, or POND #1 DETAIL SCALE: N/A DATE: NOVEMBER 17, 2023 outlet. the 401 Oversight Unit at 919-733- REVISIONS: SHEET NO.. 1786. 3-„-24 C5.3