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HomeMy WebLinkAbout6.14_Gallatin Subaru_Civil Engineering Report App C_Pond Calculations_5-22-2020GA L L A T I N S U B A R U PO N D S U M M A R Y Po n d # R T V V o l u m e P r e - D e v 1 0 - y r Pe a k F l o w 10 - y r S t o r a g e Re q u i r e d ① Or i f i c e Dia m e t e r Or i f i c e Flo w r a t e RT V D r a w d o w n Ti m e 10 - y e a r P o n d El e v a t i o n ② Re c t W e i r Wid t h 10 0 - y e a r P o n d Ele v a t i o n ② Pr e t r e a t m e n t V o l u m e 10% RTV (f t 3 ) (c f s ) (f t 3 ) (in ) ( c f s ) ( h r ) ( f t ) ( i n ) ( f t ) (ft3 ) A 1 , 5 8 8 0 . 2 4 8 1 , 5 6 0 0 . 5 0 . 0 0 9 4 8 4 7 9 0 . 1 5 1 2 . 0 4 7 9 0 . 2 9 1 5 8 . 8 B 1 , 7 4 5 0 . 2 5 9 1 , 6 9 3 0 . 5 0 . 0 1 0 4 8 4 7 9 1 . 4 2 6 . 0 4 7 9 1 . 7 5 1 7 4 . 5 C 2 , 8 2 1 0 . 3 7 2 2 , 7 9 9 0 . 7 5 0 . 0 1 6 4 8 4 7 9 2 . 1 1 1 2 . 0 4 7 9 2 . 2 4 2 8 2 . 1 Sp e c i f i c N o t e s : ① V a l u e d e r i v e d f r o m C i t y o f B o z e m a n A p p e n d i x C M e t h o d ② V a l u e d e r i v e d f r o m S t a g e - S t o r a g e C u r v e f r o m H y d r a f l o w H y d r o g a p h s E x t e n s i o n f o r A u t o C A D L: \ 1 9 3 2 9 0 \ C o m p u t a t i o n s \ S t o r m w a t e r \ P O N D S U M M A R Y Pond Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2019.2 Thursday, 05 / 28 / 2020 Pond No. 1 - POND A Pond Data Contours - User-defined contour areas. Conic method used for volume calculation. Begining Elevation = 4788.50 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 4788.50 949 0 0 1.00 4789.50 1,625 1,272 1,272 2.00 4790.50 2,349 1,976 3,248 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 0.50 0.00 0.00 0.00 Span (in) = 0.50 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Invert El. (ft) = 4788.50 0.00 0.00 0.00 Length (ft) = 0.10 0.00 0.00 0.00 Slope (%) = 1.00 0.00 0.00 n/a N-Value = .011 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Multi-Stage = n/a No No No Crest Len (ft) = 1.00 2.00 0.00 0.00 Crest El. (ft) = 4790.00 4790.25 0.00 0.00 Weir Coeff. = 3.33 2.60 3.33 3.33 Weir Type = Rect Broad --- --- Multi-Stage = No No No No Exfil.(in/hr) = 0.000 (by Contour) TW Elev. (ft) = 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s). 0 300 600 900 1,200 1,500 1,800 2,100 2,400 2,700 3,000 3,300 Stage (ft) 0.00 4788.50 0.20 4788.70 0.40 4788.90 0.60 4789.10 0.80 4789.30 1.00 4789.50 1.20 4789.70 1.40 4789.90 1.60 4790.10 1.80 4790.30 2.00 4790.50 Elev (ft) Storage (cuft) Stage / Storage Storage Pond Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2019.2 Thursday, 05 / 28 / 2020 Pond No. 2 - POND B Pond Data Contours - User-defined contour areas. Conic method used for volume calculation. Begining Elevation = 4790.00 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 4790.00 1,441 0 0 1.00 4791.00 2,416 1,907 1,907 2.00 4792.00 3,449 2,917 4,824 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 0.50 0.00 0.00 0.00 Span (in) = 0.50 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Invert El. (ft) = 4790.00 0.00 0.00 0.00 Length (ft) = 0.10 0.00 0.00 0.00 Slope (%) = 1.00 0.00 0.00 n/a N-Value = .011 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Multi-Stage = n/a No No No Crest Len (ft) = 0.50 4.00 0.00 0.00 Crest El. (ft) = 4791.50 4791.75 0.00 0.00 Weir Coeff. = 3.33 2.60 3.33 3.33 Weir Type = Rect Broad --- --- Multi-Stage = No No No No Exfil.(in/hr) = 0.000 (by Contour) TW Elev. (ft) = 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s). 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 Stage (ft) 0.00 4790.00 0.20 4790.20 0.40 4790.40 0.60 4790.60 0.80 4790.80 1.00 4791.00 1.20 4791.20 1.40 4791.40 1.60 4791.60 1.80 4791.80 2.00 4792.00 Elev (ft) Storage (cuft) Stage / Storage Storage Pond Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2019.2 Thursday, 05 / 28 / 2020 Pond No. 3 - POND C Pond Data Contours - User-defined contour areas. Conic method used for volume calculation. Begining Elevation = 4791.00 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 4791.00 2,632 0 0 1.00 4792.00 4,098 3,338 3,338 1.50 4792.50 4,844 2,233 5,570 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 0.75 0.00 0.00 0.00 Span (in) = 0.75 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Invert El. (ft) = 4791.00 0.00 0.00 0.00 Length (ft) = 0.10 0.00 0.00 0.00 Slope (%) = 1.00 0.00 0.00 n/a N-Value = .011 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Multi-Stage = n/a No No No Crest Len (ft) = 1.00 4.00 0.00 0.00 Crest El. (ft) = 4792.00 4792.25 0.00 0.00 Weir Coeff. = 3.33 2.60 3.33 3.33 Weir Type = Rect Broad --- --- Multi-Stage = No No No No Exfil.(in/hr) = 0.000 (by Contour) TW Elev. (ft) = 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s). 0 600 1,200 1,800 2,400 3,000 3,600 4,200 4,800 5,400 6,000 Stage (ft) 0.00 4791.00 0.20 4791.20 0.40 4791.40 0.60 4791.60 0.80 4791.80 1.00 4792.00 1.20 4792.20 1.40 4792.40 1.60 4792.60 1.80 4792.80 2.00 4793.00 Elev (ft) Storage (cuft) Stage / Storage Storage