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HomeMy WebLinkAboutHydraulic Analysis- Spraddle CreekSeP -21. 2006 12:05PM Peak land consuItants,Inc PEAK LAND CONSULTANTS, INC. PEAK LAND SURVEYING, INC. PEAK CIVIL ENGINEERING, INC_ September 27, 2006 Mr. Doug Carley, Layton Construction Mr. Tom Kassmel, Town of Vail Mr. Chad Salli, Town of Vail Mr. Dave Brooks, John Hardy Group (Four Seasons) Mr. Harry Baum, Western Slope Utilities RE: Hydraulic Analysis of Four Seasons Dewatering Dear Sirs, N o , 2 9 2 8 P. 2 PHONE 970 - 476.8644. FAX 970 - 476 -8616. 1000 LION'S RIDGE LOOP. VAIL. CO 81657 Peak Civil Engineering, Inc. reviewed the groundwater well discharge plan proposed by Layton Construction (attached) and has the following recommendations: All dewatering /groundwater diversion flows (from 6 lines of wells at 12.2 cfs estimated total flow) from the Four Seasons project site should be placed into the Spraddle Creek storm sewer system which has adequate capacity for 100 -year storm events (See attached hydraulic grade lines). Existing storm inlets located on West Meadow Drive west of the upcoming 2006 Spraddle Creek 6x3 CBC project should not be used for the diversions. The existing 12" CMP storm sewer appears to be under -sized to handle 25 -year events (or less) per the 1992 Muller Engineering Streetscape Study. The attached calculation for the existing 12" CMP storm sewer shows that the full flow capacity is only 3.05 cfs, with 1.98 cfs and 1.65 cfs proposed from well line 2 and line 6 respectively. The 12" existing CMP would have 1.07 cfs and 1.4 cfs reserve capacities with either line 2 or line 6 discharges respectively. Small runoff events ( <10 -year) from the hydrologic basins (as defined by Muller Study) would quickly fill these reserve capacities and over - topping of West Meadow Drive would occur. The dewatering /groundwater diversion should be piped to the downstream end of the pending CBC project at the existing storm sewer vault (see attached exhibit) if the CBC project is not complete when discharges begin. The extra flows should not be passed through an active adjacent construction site and place more burden on Western Slope Utilities operations. Despite the existing twin Spraddle Creek CMP's poor condition under West Meadow Drive, additional capacity remains and these culverts would accommodate most events (with added dewatering) approaching the 100 -year storm probability of surcharge /damage to public and private property. If you have any questions regarding these recommendations, please don't hesitate to contact me. Sincerely, Grant Anderson, P. E. Peak Civil Engineering, Inc. Cc: Mark Luna, Romeo Baylosis, File attachments Sep-21. 2006 12:05PM peak land consultants inc Doug Carle N o , 2 9 2 8 P, 3 From; Tom Kassmel [TKassmel @vailgov.com] Sent: Thursday, August 10, 2006 5:09 PM To: tJ; Doug Carley; Matt Gennett Cc: Chad Salli; Leonard Sandoval Subject: Four Seasons Dewatering To all For clarification: A Public Way permit with a staging plan and a dewatering routing plan was submitted for the Four seasons by Layton. At a previous meeting it was discussed that we would need an engineered analysis showing the following; - anticipated flow (gpm /cfs) - amount of flow going to Spraddle Creek and to the west Storm sewer - Hvdraulic analysis showing the additional flow dogs aot`sicLnnificantly minimize the exis inq ca acyt -+v. 'An engineered_analysj.s of the dewatering plan as it relates to the potential settling of adjacent buildings. (This is of particular concern now due to the two reports received from adjacent properties and past experiences) -copy of state dewatering permit We have not yet received this information. These comments specifically are from the engineering department. Additional comments have been sent regarding staging, phasing, etc... from the PW department. If you have any questions please give me a call. Thanks Thomas Kassmel, P.E. Town Engineer Town of Vail Public Works Department 1309 Elkhorn Dr Vail, CO 81657 ! ➢l O_MN M ; (970) 479 -2235 51 w ,�Mr��1Pfi' 1� r14%) �hPM1G�s), i('k�i?GG CP�� f ro TN� Gllr� y'Talp>.vt 'PAR �Rt��AI � A- rrrlGi a- 11A.1, I tlB ��m ron, �7(f Sr1f+iC7 C��Fi�l • ,�`� �e�r: I �iI x l4�pM).1 �'S9j''`'� eurut"7 Iq$ rrI` Ij'fn 1 b Tl" FvtO1TTiFtt. 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SPRADDLE 2 WEST STORM SEW 3 SPRADDLE 4 SPRADDLE 5 SPRADDLE 6 WEST STORM SEW ?k --F--448-831GPMICFSI-- GPM CFS 1628 3.63 888 '1.9 592 t 1.32.p -f- 1.32. 1036 ?.31 740; 'W1-.6& LA Fes] r C toN Scenario: Base 4 f .gym -104 Y"1.1- -2 Cf n 'a, BMX) e 2 J-1 QA � 508� o CmeS VAuLr J e13 6ND pwasEip 6 -e 3 CG$C- Title: SPRADDLE CULVERT p:11400- 149911454Wrainage11454 -6x3 box.strn Peak Land Consultants StorrnCAD v5.6 (05.06.007.00j 09/13/06 02:22:03 PM 0 Bentley Systems, Inc, Maestad Methods Solution Center Watertown, CT 06795 USA +1- 203 -755 -1666 Page 1 of 1 N �l N O O Q> N O CS1 _ a 0 z 0 N f� N 00 ProTile Scenario: Base Profile: PEAK 127.2 CFS 6x3 CBC N �J o 0 Scenario: Base _ N O Q1 8,165.00 .... ...... . . ..... ...... ................ _ 8.165.00 - Label:I - I Rim; 8,162.50 ft Sump: 8,154.70 ft _ 8:160.00 - ----------- - - - - -- ---------- - - -N, - ---------------------------------------------------------- ----- - - - - -- ...•. -------------------------- ------------------------- - - - - -- - 8.16D.00 Label: I.2 Rim: 8,156.30 9 Sump: 8,151.10 ft _ Label: J -1 �i �~ v' Rim: 8,152.69ft Sump: 8,149.69 R � — 8:155.00 ---- e .05Rn8 - Sump- 8,149:06 ft 8.155.00 Elevalial (ft) = f i .h:, , v .. abet: pllil! , _ . .._ ...... �... � Up. Invert: 8, 5q.70 ft InveAft: 8 5 10 ft 1. .,.!.n;,;;; yl;:_ i ,1 :.— '`''- - !i,�,,�!;,,i4 l;i;�: -�_, ,• Label: � 7 � �° ;; Sunip:' h � 8.150.00 S¢e:fit3ft - - -- - -- - S: 0.0425013 Tit - -- ...:!1 y �. � : _ !;,i - - - -- - -- � ,1 { 815 O.OD % , 3 U ; 41St I;I . 1 i Label: P•2 Up. 1.10ft P u P•3 Dn. lnveA: 8,149.69 ft L: 83.30 ft Up. Invert: 8,149.69 ft S ¢e: 6 X3 ft Dn: Imre9: 8,149.0 bel: PA 8.145.DD S: 0.016927 ft'ft L: �. SO ft Up. Invert: 8,149.05 h Size: 018768 fl1ft L 93 30 9:8,146 -72 h j _ 8,145.00 0 3+00 4400 5+00 Size: 6 x 3 R 6+00 7+00 S: 0.024973 MR ^� Station (h) o Title: SPRADDLE CULVERT J p:\1400- 1499 \1454\drainage \1454 -6x3 box.atrn Peak Land Consultants StormCAD v5.6 [05.06.007.00] %V 09!27106 11:28:27 AM 0 Bentley Systems, Inc. Haestad Methods Solution Center Watertown, CT 06795 USA +1- 203 -755 -1666 Page 1 of 1 SCenarl0: Base PEAK SUMMARY Label Section Size Description Section Shape MaterlalConstrude< Slope (ftlft) I Length (ft) Total System Flow (Cfs) Design Capaci (cfs) Upstrea rr Invert Elevatior (ft) Downstrear Invert Elevation (h) Hydra uli Grade Line In (ft) Hydraulic Grade Line Out (ft) Avemge Velocity (fUs) Headloss Method Gravity Element Headloss (ft) 0 -1 127.20 3,146.72 8;146.72 0.00 J-2 127.20 3,152.10 31151.46 HEC -22 Ener 0,64 -1 127.20 3,152.64 3152.10 HEC -22 Ener 0.54 1 -2 127.20 5,154.22 8,153.51 HEC -22 Ener 0.71 1 -1 127.20 3.157.11 3,157.11 HEC -22 Ener 0.00 P -1 6 x 3 ft Box Concret 0.042503 84.70 127.20 424.16 8,154.70 8,151.10 3,157.11 3,154.22 20.02 2.89 P -2 6 x 3 ft Box Cancret 0.016927 83.30 127.20 267.68 8,151.10 8.149.69 3,153.51 3,152.64 14.64 0.87 P -3 6 x 3 ft Box Conciett 0.018768 34.10 127.20 281.86 8,149.69 8,149.05 3,152.10 3,152.10 15.17 -0.00 P-4 16 x 3 ft I Box Conaeh 0.024973 93-301127.201 325.13 8,149.05 8,146.72 3,151.46 3,148.16 16.73 3.30 s i Title: SPRADDLE CULVERT p: 11400- 1499114S41drainage \1454 -6x3 box.stm Peak Land Consultants StormCAD v5.6 (05.06.007.00) 09f27106 1111:29:01 AM © Rentley Systems, Inc. Haestad Methods Solution Center Watertown, CT 06795 USA +1 - 203 -755 -1666 Page 1 of 1 N .l N 0 rn ti 0 rn m n.> a� o.� r. z 0 N Co N 00 r Profile Scenario: Base Profile: PEAK 182.2 CFS 6x3 CBC Scenario: Base 8,165.00 Label: I -1 Up• Invert: 8,154.70 h Rim: 8. 162.50 ft Label: 0.1 Sump: 8,154.70 ft Dn. Invert: 8.151.10 h L. 84.70 8,160.00 --------- ------ - - - - -- - - - - -- - - - - -- -- ----------------- - - - - -- - - -- -- - - --- ------------------------------------------------ - - - - -- --- - - - - -- - - - -- ---- - - - - -- - - .. •- � Rin: 8,156.30 ft r�,,, Surro: 8,151.10 It - - -- — .... 8,150.00 S: 0.042503 Mt —Label. J -1 .;= Rim: 8,152.��gg R - -._ r� i >f - -- 8,155.00 Ey i , -- Sump: 8,149.69 ft Label. J -2 Rim: Sump 8,149059 ....... ' Label: P•2 t,. = ., f Y 3 -Eti I I�i li � b I• P 1 '�_�����' .; I ,� s,.hit— ;: 1111 f,-- �h,ir:�.:, Dn. Invert: 8.14..69 ft Up. Invert: 8.149.¢9 h'` L• 83.30 ft — fft 8,165.00 N �J a 8,16D.00 8,155.00 Elevation (ft) Up• Invert: 8,154.70 h r.y p,s, ; ' „=`tih� ,, Label: 0.1 Dn. Invert: 8.151.10 h L. 84.70 y:;, I;I! - ,,.k m 4:_�_a:. �:. i• '- +�!a --i:?i� is — —`� '�,,,,� 3•F /� { Sim: 8,84,4612 8,150.00 r�,,, - - - - - -- - -- - - -- — .... 8,150.00 S: 0.042503 Mt Label: P•2 t,. Up. Invert: 8,151.10 h /Label: P3 Dn. Invert: 8.14..69 ft Up. Invert: 8.149.¢9 h'` L• 83.30 ft 4 00 Size:6x3ft Dn. 9. SlLabei:P•4 S: 0.016927 611 ; 34.10 ft Up. Inven: 8,149.05 ft z Ize; x 3 ft Dn. Inverl: 8,145.72 ft o 8.145.00 S: 0.018768 NOR L:93.30ft 8,145.00 3+00 4 -00 5+C0 SQe: 6 x 3 ft 6400 7+00 S: 0.024973 %'ft Station (ft) Title: SPRADDLE CULVERT p:11400- 1499%14641dralnage\1464 -6x3 box.stm Peak Land Consultants StormCAD v5.6 [05.06.007.001 09/27/06 11:30:51 AM 0 Bentley Systems, Inc. Haestad Methods Solution Center Watertown, CT 06795 USA +1- 203 - 7551666 Page 1 of 1 Scenario: Base PEAK SUMMARY Label Section Size Descriptio Sectior Shape Material Constructed Slope (Wft) Length (ft) Total System Flow (cis) Design Capa (cfs) Ups(rea Invert Elevatior (ft) ownslrea Invert Elevation (ft) ydrauli Grade Line In (ft) Hydrauli Grade Line Out (ft) Average Velocity (Ws) Headloss Method Gravity Element Headlos (ft) 0-1 182.20 8,146.72 8,146.72 0.00 J -2 182.20 9,153.02 3,152.05 HEC -22 Ener 0.97 J -1 182.20 9,154.19 9,153.28 HEC -22 Enet 0.91 1 -2 182.20 3,156.07 3.154.84 HEC -22 Ener 1.22 1 -1 182.20 9,157.70 3,157.70 HEC -22 Ener 0.00 P -1 6 x 3 ft Box Concreb 0.042503 84.70 182.20 424.16 8.154.70 8,151.10 9,157.70 3.156.07 10.12 1.63 P -2 6 x 3 It Box Concret4 0.016927 83.30 182.20 267.68 8.151.10 8,149.69 9,154.84 3,154.19 10.12 0.65 P -3 6 x 3 ft Box Concret4 0.018768 34.10 18220 281.86 8,149.69 8,149.05 3,153.28 3,153.02 10.12 0.27 P-4 6 x 3 It Box Concreti 0.024973 93.30 182.20 325.13 8,149.05 8,146.72 9,152.05 3,148.63 18.70 3.42 Title: SPRADDLE CULVERT -� p: \1 400- 14 9911 454\drainage \1454 -6x3 box.stm Peak Land ConsuRants StormCAD v5.6 [05.06.007.001 09127106 11:31:15 AM Q Bentley Systems, Inc. Haestad Methods Solution Center Watertown, CT 06795 USA +1- 203 -755 -1666 Page 1 of 1 N .l N 0 0 rn m a� a n 0 cu cn n z 0 N CO N 00 C i Pe Scenario: Base Profile: PEAK 170 CFS Scenario: Base N O Q) 8,165.00 8,165.00 Label: l -1 CD Rim: 8,162.50 ft °c Sump: 8, 154.70 ft I&wm a s 8,160.00 fi� Label: I -2 ! c Rim: 8,156.3') P. Sump: 8.151.10 ft Label: A ,% Rim: 8,152.89 ft N _ - ... Sump: 8,149.59 h Label: J•2 8,155.OD -� 1 - - - - Rim: 8,152.05 flfl € Sump: 8,149.05 ft 8,155.00 Elevation (ft) �q��� abet: P -1 ��; ",E` Up.hert:1g,154.70ft _d � r� rs w Dn. Invert: 8,151.10 ft ' ' . I _�� 1i� Label: 0-1 L: 84.70 h �� / Rim: 8,149 72 ft 8,150 -03 ... ...........- Size:fix3ft --------------------------------- =fir s'.�'' ,'_:,� �. - - Sump_8.146.72P, ; 8 OD S: 0.042503 MI aS "�E ,150. Label: P -2; U Invert: 8,151.10 h l p�: I label; P•3 overt: 8,149.69 h ;r i L: 83.30 ft Upp. Invert: 6,149. Sae: 6 x 3 ft Dh. Inven: 6,149. bet: P4 S: 0.0169271t'ft L 34.101 Up. Invert: 8,149.05 h i I 8,145.00 Size:6x ft On. Invert: 8,146.72h z S: 0.018768 ftM LAM ft l 8,145.00 ° 3+00 4►W 54W Size: 6x3 7400 ^' S: 0,024973 it'ft N Station (ft) Title: SPRADDLE CULVERT p:11400- 1499114541dra Ina ge11464 -6x3 box.stm Peak Land Consultants StormCAD v5.6 [05.06.007.001 d 07125/06 10:58:36 AM C Bentley Systems, Inc. Haeslad Methods Sorulion Center Watertown. CT 06795 USA +1- 203 -755 -1666 Page 1 of 1 Profile Scenario: Base �C) �'f- Profile: PEAK -115 CFS 6x3 CBC Scenario: Base 8.ta5.DD 6,165.00 Label: i 8 162.50 ft Sump: 8,154,70 ft 8,160.0(1 -- - - - - - -- -- - - - - -- - - - - -'� - -- -- G-------- _.._- ..-- •------- - - - - -- -••--------- `81600D Label- 1.2 Sump: 8,151.10 It Label: J•1 J _ - Him: 8,152,69 ft Sump: 8,149.69 ft , Label: J -2 6,155.00�?t:;f .... - - - -- -- -- -- - ] �.` gum B, 52.06ftft mp:> .149.05 h 8.155.00 bel: I - Dn. invert: 8 :151.15 fftl 4,- h� g' ��� - ! r Label: 0 -1 L 84.70 ft .stir Rim: 8.149.72 h 8.150.00 - Size:fix-311.-- - - - - -- S: D.042503 Wit - a 4 z r�, -.... _ ........... ump:8,146.72ft ..... 8130.00 Le bet: P•2 j Up. Inved: 8,151.14 ft Dn. 8, 49. ft ; Label: P-3 rl'; ?; nvea: L: 83.30 flfl L: 83 6 x 3 ft Up. invert: 8,149.69 ft Dn. Invert: 8, 49.05 l: p.4 L:34.10ft �: 8,145.0) S: 0.016927Nft Up�nw:8,149.05ft Size: 6x3ft Dn.ln� 8,146.72 ft 5:0.01876816'11 t 4 +DD ;_:93.3011 Size x3 6400 8,145.00 7400 5:0. 497 N,, Station (ft) Title: SPRADDLE CULVERT p:11400- 1499114541drainege11454 -6x3 box.stm Peak Land Consultants Q07/25/06 11 :15:61 AM 0 Bentley Systems, Inc. Haestad Methods Solution Center Watertown, CT 06795 USA +1 -203- 755 -1666 IN N 0 N O QJ 0 0 Elevalion (F) " StormCAD v5.6 (06.06.007.00) Page 1 or 1 z N �-=-- Sep'27. 2006-12 07PM peak land consultantslinc - \W�15 No / .29 28 P• 1314 LE IN -- .� P L1 P r I WM 11 tit , .3.y 1 Of- Y. a WM i2 1 �� �p1G pg5 F),\x 4� M YA LL TYPE,15 INLET" \ iyPF 13 INLET 5 _ REPLACE EXIST. E� 13TI,NCt CRr � ,wP ,13 INL�i" PIPE ►d1 2dCMR ° PVC :x �� Q loo • 18 cfs CULVtxT:. `! - �4io-- -I�.�� rYrF,, 13 Cp f3iNAT10N i;AGlr t~XIST , t- NLE I N SUNFIP�pE W%`C�4 -e�°t - 1' /\ �'•- -� z j' �' TV PE 13 F NG rte_:. ., : , � i �: •. , � , ' . ' "• ' ,glb �_: .�'_�. .. (\ \\ � �.. _ 19921/ •.:�� ,� 1 SFr - __. ...� 7 - ••••.t..:.J`�f - - •('� t \ �`• ••'""' • "i ". ^mot -- .. _ .. ~~�� �,w�t�.. -.rte - �'��_•�' ,�- �`- "`-� "�.:'�' • � `L• —•- —s •� —~•ti. IONi:lQY1�� FF1C�r'�i`�Sf+C CnCE1;,VALLY C+�T.�II�I IhF�r }ttr� fvl2�`h1^�.I /ODD IF1C�D. _ -- GT16AMN A )R /CXI^fT 4 SHOWN 01-1 THIS MAP, SEE 1' " ` RAT; SE STANDARD N'E T. ,DE.INO D SEDIMENT TRAP - •::` �' � �... _ r,1.�- ...,_, ��� j:j,� _ -- REV I SIGNS _. ✓� r ;T/ �?� -i Nrl nATC AY r' ;In f1FCr`pIDTIr11U f f I� 8152.6' L OUTLINE OF MEDICAL CENTER I r S� W--- _ -8152- _ 4815 - -4 Q %"A ALPHORN � #121 WEST MEADOW DR. JDO ` 4 STORM INLET CRATE ELEV. = 8148.6' 12" INV. (E) 8145.9' 12" INV. (S) 8146.1' 18' INV. (S) 8146.1' / =8152 ' _-f — L 8$49-- 0'+ (,C 8150. 111 lP/bV &4 T2' GNP 8119.0 - - - 8149.8'+ 8 ASPHALT _�4'HlTE $ ROADWAY_ a Q -•0 4 9' �.o'c3 12" CA1P '+ 8,50.4' ��0F1 �0An1 Im 815t.J' � 8158 fl, B1sa9� lZ .Qwp 8151.94 \ 8152 — \ v U 0 k\ N 00 l— 815 CID C Hue N 0 519' rn ry STORM INLET o 1540' GRATE ELEV. = 8150.2' v 12" INV. (N) 8148.6' 12" INV. (E) 8148.6' 12" INV. (W) 8148.5 B,sa.4' PAVED , s. VVEWAY 8162 o 815t.J' � 8158 fl, B1sa9� lZ .Qwp 8151.94 \ 8152 — \ v U 0 k\ N 00 l— 815 ISep.21. 2006 12:07PM peak land consultants,inc PJo.2928 P. 15 Existing Storm Sewer Capacity WEST IN Worksheet for Circular Channel C J t",)F-� f-tF -- r W Dfz Project Description Project File 01400 - 1499 \1454\ drainage \flowmaster - diversion - groundwater wells \groundwa.fm2 Worksheet Existing 12" CMP Flow Element Circular Channel Method Manning's Formula Solve For Full Flow Capacity Input Data Mannings Coefficient 0.024 Channel Slope 0.025000 fUft Diameter 12.00 in Results Depth 1.00 ft Discharge 3.05 cfs Flow Area 0.79 ftz Wetted Perimeter 3.14 ft Top Width 0.00 ft Critical Depth 0.75 ft Percent Full 100.00 Critical Slope 0.030179 ft /ft Velocity 3.88 fus Velocity Head 0.23 ft Specific Energy FULL ft Froude Number FULL Maximum Discharge 3. cfs Full Flow Capacity 3.05 cfs r Full Flow Slope 0.02 00 fUft IN 6E -w r; -,,G3 cfy wtL), = �► ?F (Tc, s r�o fl ctz A �l F Lo w5 09/14/06 11:33:50 AM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755 -1666 FlowMaster v5.15 Page 1 0 f