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Home My WebLink AboutResolution - 4070 - CO #1 To Contract - MA Mortenson Company - New Water Reclamation Plant #4 - 01_28_1993Resolution No. 4070 January 28, 1993 Item No. 23 RESOLUTION BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK: THAT the Mayor of the City of Lubbock BE and is hereby authorized and directed to execute for and on behalf of the City of Lubbock Change Order No. 1 to be entered into by and between the City of Lubbock and M.A. Mortenson Company with regard to the New Water Reclamation Plant No. 4, which Change Order No. 1 is attached herewith, which shall be spread upon the minutes of the Council and as spread upon the minutes of this Council shall constitute and be a part o s Resolution as if fully copied herein in detail. Passed by the City Council this 28th Xday(of ��v� WWI MIM ATTEST: GI, , Sally St' A e, Acting City Secretary A P OVED S CON ENT: V Da aw ins, erector o Water Uti ities APROVED AS TO FORM: Lla" 10 G. Vandiver, rst ASSi Stan City Attorney DGV:dw/Agenda-D2/Rec1matn.Res January 15, 1993 nuary _ , 1993. Resolution No. 4070 LUBBOCK, TEXAS NEW WATER RECLAMATION PLANT NO. 4 AND SOLIDS HANDLING FACILITIES SRF PROJECT 3104-002 CHANGE ORDER NO. 1 SCOPE. This Change Order No. 1 adjusts the quantity of excavation and concrete placement for cylindrical piers at the Headworks and Main Lift Station structures. REASONS FOR CHANGES. A lump sum cost is included to compensate the Contractor for an increase in the quantity of excavation and concrete for cylindrical piers and for the additional effort required to drill through suitable bearing material to install the pier bells. Suitable bearing material to terminate the pier excavation was located above the elevation indicated in the Contract Documents. However, terminating the pier bells at the higher elevation would have resulted in a conflict with substructure piping and excavation in adjacent areas, making construction of the Headworks facility as originally designed unfeasible. Drilling through the otherwise suitable bearing material to an elevation lower than the elevation indicated in the Contract Documents was required to excavate for the pier bells. The additional effort to drill through the otherwise suitable bearing material was not originally required by the Contract Documents, since pier bells were to terminate at the top elevation of this material. Attached to this Change Order is a copy of Mortenson's letter dated December 7, 1992, and Black & Veatch's letter dated January 11, 1993, concerning this item. BASIS FOR CHANGE. Additional pier concrete and excavation for a lump sum price of $38,546.00. All other provisions of the Contract remain unchanged. CHANGES TO CONTRACT PRICE. Original Contract Price Current Contract Price adjusted by Previous Change Orders Contract Price due to this Change Order will be increased by (LUBBOCK, TEXAS ) (17578.420 ) (CHANGE ORDER NO. 1) C01-1 $29,688,504.00 $29,688,504.00 $ 38,546.00 New Contract Price including this Change Order $29,727,050.00 To Date Percent of Original Contract Price 0.13% CHANGE TO CONTRACT TIME. The Contract time will not change due to this Change Order. AGREED to this 28th day of OR�TN COMPANY By Title (LUBBOCK, TEXAS ) (17578.420 ) (CHANGE ORDER NO. 1) CO1-2 Title MAYOR ATTEST : G- Sally St' 1 Abbe, Acting City Secretary P VED CJA r 1 A. Hawkins, Director of Water Utilities APP VED AS To FORM: I z-� r Do ld G. V iver, First Assistant City Attorney MORTENSON The CorlstrUCtiOrl Orgatfizatimi" December 7, 1992 Mr. Robert McCollum Black & Veatch 5728 LBJ Freeway, Suite 300 Dallas, Texas 75240 Re: City of Lubbock New Water Reclamation Plant No. 4 and Solids Handling Facilities Project No. 2123-54110-1-9640 Lubbock, Texas MAM Job No. 928002 Subject: MAM CE #77; Pier Drilling Operations Dear Mr. McCollum: HEAVY INDUSTRIAL DIVISION 700 Meadow Lane North PO Box 710 (55440) Minneapolis. Minnesota 55422 Telephone (612) 522-2100 Facsimile (612) 520-3430 As requested by Black & Veatch, below is our proposal for the extra Pier Drilling Operations. We have completed the outlined work for a lump sum add of $38,546.00. This proposal includes the total cost for the above requested changes. If you have any questions or comments, please contact this office. AvidJ.lGattor ous, Construction Manager DJG/mkb0101 cc: Mr. Jerry Kieser, Mortenson Co. MAM CE No. 77 Offices In Minneapolis Seattle Denver Colorado Springs Milwaukee Grand Rapids St Paul DIRECT COST ESTIMATE M. A. MORTENSON CO. Plan Sheet No. Take -off Quantity Spec. Ref. Bid Quantity Form M-5 DESCRIPTION P1E2 gS0tnVAIrs2q gam. RIO Ivv-f-c\t e%%i &bmw, E)tT U Fr SYA I-APJI\ LMU ZAJNEl t IMti to WIC 0- 1209, 1► k %c�A C`eNCRETE � 5� SPFkADS►+T N�aowe�Cs VA I PR.8(-;T ks3 10. QUANTITY Job LUBBot'X' Date Item Desc. (Ef— Sheet Z of Z Estm. Ckd. ITEM DIR. LABOR DIR.•MAT'L PERM MAT'L OR SUB. E.O.E. TOTAL Unit Amount Unit Amount Unit Amount Unit Amount Unit Amount 3s I h o I e 4-I 225g9 34-03 LS5 285b 5D16 S954b BID ITEM DIRECT COST ESTIMATE M. A. MORTENSON CO. Plan Sheet No. Take -off Quanti Spec. Ref. Bid Quantity Form M-5 DESCRIPTION L) k-,6- 1oc�` ra�lt�PtC_ T o DO1 e,& ��IT PRICE - A IJA-L P��eeaC $ 44 ,-0 / Q1 j 44%w� FQ — 0,5e tR2w rSkEtAW j � I. b3 cYIMN V�sL_ 21 VA3 �(-,t 0 =� 109Z �uMP l�A b5014-0 Ls� 4 +' O.T. l QV? �t l� NrAP QUANTITY Job LUFBff-,t—' Date Del q2� Item Desc. 1 �EQ1 C Sheet ` of Estm. G Ckd. ITEM DIR. LABOR DIR. •MAT'L PERM MAT'L OR SUB. E.O.E. TOTAL Unit Amount Unit Amount Unit Amount Unit Amount Unit Amount I oo °3 V- b2S 9sl ,932. BID ITEM Distributors of Construction Materials BUILDINGS - DAMS - HIGHWAYS - AIRPORTS M A MORTENSW CO SE WATER RECLAMATION PLW EXP P 0 BOX 3128 LMUCK, TX 79452-3128 S H I P T 0 5219 L4** Ava., P.O. Box 35446 - Gallas. Taxes 75236 (214) 631.5250 - A4a4'o 263.4024 24W NE 36th St. - Fort Worth, Texas 76111 (817) 838.0811 - Metro 664-3111 410D Fury_ 1.35E (North) - Waxahachie, Taxes 75168 (214) 223.9500 - FAeha 2W5106 Box 1168 - LM@ Pock, Arkartmas 72203 (501) 945-2309 - (501) 945.2361 - (Tar Free in Admuss) 1-&0 391-0D78 q0'7 (] INVOICE: 'SEo No. IOC p 497378 11/12/92 66[-j 1 1 SE WATER REMWTIDN PLANT #4 3603 00 & 34TH LIIBBUCIC, TX 79457 ICCOUNT" OR6ER GATE, CUSTOMER 6RDEFi kO. DATESFUPPED 5- r' SHIP VIA I°4;e : CMARGEs:'� � GLC "iz-BY: �,O,' $WN 140.- —JoB'NUMBER,' 016M 11/09/92 11/12/92 LLOFF PREPAID DESTINATION 82 WA/dtr 0 OM40600 a � Xy° +iwF? ^'' r"JOB DESCRIt?�tON, at; 1ITA J . ;`ticis Em NO t, E WATER RECLAFATION PLANT #4 DOW133-1201 FERAL INS CO DIRIS LEAHr (806) 762-0991 ti�PAR Nq Y t `a it `."=?' ' AE9CRiPTION �1.? i;: UNffx '4-ORDEFIED43+ 1` SHIPPED.! i3%IdkdRDE iEQ 3..{' IiCE :y IMOl1NTS' 924%W-66 " EXTRA TO CONTRACT R!_INF FOR MAIN LIFT STA. PIERS (AW'L DEPTH) ------ -- ---- B-07-60 ---- -------- ----------------------------------------- #7 GR. 60 REM ------------ ------------- ------------- -------------- per CWT -------------- LBS M.00 2515.00 .00 19.000 489.25 8-04-60 #4 GR. 60 RBM per CWT LBS 687.00 687.00 .00 19.000 130.53 B-09-60 #9 GR. 60 REBAR per CWT LBS 1224.00 1224.00 .00 19.000 232.56 ------------ ---------------------------- ------------------------------------- Release: 066 CCI. CH ------------- --- ---------------------------------------- SUBTOTAL 852.34 TOTAL 852.34 Ito �. 1 y , ERMS;1/2 OF 1 % 10 DAYS — NET 30 DAYS )LIE AND PAYABLE IN DALLAS COUNTY, TEXAS r,'�4A[T�.TA�P�C7iiR(1X�544R?"I�AI(1�AR�tTFk'A.^�i'a7Fi9'�� CUSTOMEFrs sla"T(ME oourrsn C. .An ioc u.uc A Distributors of Construction Materials -BUILDINGS - DAMS -HIGHWAYS - AIRPORTS M A MDRTEi1';4lI CO SE WATER, FEQJMTI(IJ FL;lT EX° # O BOX 3123 EM1307.1 T,". 79152-3128 5219 Map* Ava.- P.O. Box 35446 - DWAt& Tom 75235 (214) 631-52.50 - MWO 283-4M4 2400 NE 35th 3L - Fort Wwdi, Tun 76111 (617) 638.6611 - MWO 664-3111 4100 Hwy. (Nw" - Wax*m&ja, Taxes 75165 (Y14) 223.950D - MWO 299-5105 boot iMA - Lkk Rock. Ar wmp 72203 (501) 9452309 - (501) 94&2361 - (Ta! Free in Mama) 1-000-331-0078 MIME - 8m. = PACE 494229 10/27/92 55 2 1 1 8 H SE DATER RE-D A ViTION I MAT #4 P W-3 Gt1AVA tz 34TH T LUBM, TX 7947, O CCOUNJT7, ORDERVATE CUSTOMER ORDER mmDATE SHIPPED '.: SHIP VIIA-. " :CFIAMES .8.-_ CLK tiry.SY.114, I -SLMIN MWI { M NUMBER 01603 10/22 2 10/27/92 LOF ?REPAID DESTINATION 82 FTVIdtr 0 OOM406M h + ri eve»ki�'.zY� DESCRVRON'%i'; '' &M =4T"*ergi .yDBM40NENO. E WATER RECLAMATION PUal.'T #4 Bf NMI33-1201 FIrOML INS CO DIRIS LEAKY (M0 1762-0991 spART NO:"ter � .. ice_ F gCRjPTpN1•; ,!" MfT4 iPiiRWa7a r. ? '.vLQ; RAQMM*RED: 1, .`��PRECE t"iCz7i <rALSOLINT �" 9240600-055 EXTRA TO CMTRACT iEIIF FOR PIE1w RIMIM DEEP1]t PO 2123-54110-1-9640 B-07-60 #7 GR. 60 REM per CBT LBS 1635.00 Ib35.00 .00 IM00 310.65 2-04-6c, #4 S. 60 FOAR per CUI LYE 14�.0C 14' 2.00 .00 i r . jzQO 272.08 8-0t-61 #> GR. 6A fam Re' CWT LBS 7480.00 7480.00 .00 1p-%) 1r21.20 Release: 0`5A M CEY SilB;0TF� 2(m.rj TOTAL zC, S3 Ff "MS;1/a OF 1 % 10 DAYS -- NET 30 DAYS 3 MD PAYABLE IN DALLAS COUNTY, TEXAS CUSTiJUt:lMMNATM I Oro Initials I Date Prepared By Approved By WILSON JONEI.q CnMI-ANY MAD* U1 U.S.A. Shaft unit L F: 6huk 601:lt Each PAIJ 61h;C, cwa Earh (6 e C. F, pu-11 Each ___E Pier i y Pitr 6).-Z 4/01p*h r 1 f_. A 4X42X1`5 Ifx48,( 15, jf Y54x 13' .2416 0,� 2 1 2.06 2.00 00 z 50 26.00 26.00 .26-00 -!�b 10.00 15,00 .2.2-0,0 -a jA a 25 25 2-51 ----5 5,75. 4q o 5b 5 1. Z5- _7550 "k- RD5 -T— .41 i -74X 6 6;� .24, 4 A 72.X- 13 ,o)e 42. 5060.00 7.66 3;? 50 3.z 50 37.00 4(700 9,125 12 — 257 w i I ;r 1325 Vo "'.25 T5— LUIS- a o x 4P-Y 13' 54x 131 30,z 6 ox 30y 46X t3 3.01) 3.60 5.00 16-100 aad 6900 3404 7-z 0 a A 00 'o-no f-00 1400, 1400— zz 000 L3) f) (1 1p a 12:5 5' 1 I -4q5b Ar 00 yo 1715 11-t ... - 1- �7-00 L 0, 3. I I 52- - E2— foA ----4 ----L 6-oX66Y?4-, Y Wr,4' 30Y721 0 -v i 3 oy LUZ Z-01 JAJ J-40 a 0 72- 04 7.?-,W M-00 AM 34 an 31.00 9400 55 71101 - --------a .2 �5 f5 7 6 16!2 5b 6 --------- 12 1 15 a',Go 3aX qo'v.; -36,e)A2,,?13 a. 01 3 50 -J. 50 .3 .. r2) -noo 45.5b 45.51 920 db00.............0. 1.)40,1 a .7 25 ?s 1z 1 2-112 0 -Z 54- 272 5 4" I? 364 e4zlojW13 3,50 00 45, -1b 52-00 ./5/00 /65-00 . 5 5 -'7 5- 4 2 3 L L 515125- 25 r LL 0& 7 3 R 7 a to 13 I; 1: ;r. 17 21 V. 23 .5 27 ,n 3; 35 37 M 33 0 Initials Date Preparod By Approved By •' WIISON JONES COMPANY 672n3 1 ICCH nn :, nur I MADa M UAA. ' � ■1111 IRoom 111111■ �111111� NI!l�f7!7 . Milli INIIIE 111111■ ��111111� ■IIIA!!!!G� .. r . ■IIIE��l7�1 1M�1 �I 11 1111■ MINIM I ME iiMEN uiiii II 1 1 6 7 10 11 12 13 14 15 16 17 1a t9 20 91 22 23 24 25 26 27 26 29 30 31 32 33 3/ 35 36 37 36 39 to 10, wloj�. wa, LI r6 �Jc�o ,�l/re��.e ! �l,Y�lX13 +� -Z¢zGo z13 ;I :;4-�z66 x13 ;�-z4XGGx2¢, i z4x72x13' �-3�,r4�xf3 �ll l y-3aY5¢xz4' I' -�ox�oxl3' ox6Gx 13 I X 72xl3 ' �j 7 -dox 71V 3 �'1-3bX�'flxl3 �-z¢r4�X17 2-z�f,CS4Yzl � �� 9 24f66YZt Z-3a.r��ru' �4 ,252 -Z4 3_00 756.00 J"I � 3a", a 4_00 = 33i-,0'J 75--'#'o'* z_,00 = lSd.a o 31 a �t4' m z5o - 775.Oo 156, A 03.fo 546.00 13 ! 4Z ' 2 4,ao : S.Z. o o R7 4 ,h d ,2, 244 o 0 1-36�' g6t23� Z07 44 `a. e0o Z3�3a"®4ae Q�oJ Sd0 %1�%�A2trJ= l!Z'J�JJ /n Sao o-a PIER DRILLING CALCULATIONS PLANNED QUANTITIES PIER BOTTOM TOP PIER BELL LF NO. ELEV ELEV DIA DIA HEADWORKS 1 3136.0 3143.00 24 66 7.0 1A 0.0 0.00 0 0 0.0 2 3136.0 3143.00 24 66 7.0 3 3136.0 3143.00 24 66 7.0 3A 0.0 0.00 0 0 0.0 4 3136.0 3143.00 24 66 7.0 5 3136.0 3147.61 36 96 11.6 6 3136.0 3147.61 36 96 11.6 7 3136.0 3148.11 18 54 12.1 8 3136.0 3148.11 18 54 12.1 9 3136.0 3147.61 36 102 11.6 10 3136.0 3147.61 36 102 11.6 11 3136.0 3148.11 30 78 12.1 12 3136.0 3148.11 30 78 12.1 13 3136.0 3148.11 36 102 12.1 14 3136.0 3148.11 36 102 12.1 15 3136.0 3148.11 30 78 12.1 16 3136.0 3148.11 24 72 12.1 17 3136.0 3148.11 24 72 12.1 18 3136.0 3148.11 30 78 12.1 19 3136.0 3157.00 30 42 21.0 20 3136.0 3157.00 30 42 21.0 21 3136.0 3156.50 30 42 20.5 22 3136.0 3146.50 24 72 10.5 23 3136.0 3146.50 24 72 10.5 24 3136.0 3146.50 24 66 10.5 25 3136.0 3146.50 24 66 10.5 26 3136.0 3157.00 30 54 21.0 27 3136.0 3156.50 30 42 20.5 28 3136.0 3149.58 24 72 13.6 29 3136.0 3149.58 18 48 13.6 30 3136.0 3147.00 36 102 11.0 31 3136.0 3147.00 30 90 11.0 32 3136.0 3149.58 30 60 13.6 33 3136.0 3156.50 30 42 20.5 34 3136.0 3149.56 24 60 13.6 35 3136.0 3149.58 30 78 13.6 36 3136.0 3146.58 36 108 10.6 37 3136.0 3147.00 36 96 11.0 38 3136.0 3149.58 30 66 13.6 39 3136.0 3156.50 30 54 20.5 40 3136.0 3149.58 24 60 13.6 41 3136.0 3149.58 24 60 13.6 42 3136.0 3146.58 30 84 10.6 43 3136.0 3149.58 30 84 13.6 44 3136.0 3147.00 24 72 11.0 PAGE: 1 AS -BUILT QUANTITIES BOTTOM TOP PIER BELL LF LF AUGER ROCK ROCK ELEV ELEV DIA DIA CHANGE LENGTH LENGTH TIME HEADNORKS 3135.50 3144.00 24 0 8.5 1.5 5.00 3.50 2.00 3139.50 3144.00 36 0 4.5 4.5 0.00 4.50 1.00 3139.50 3144.00 36 0 4.5 -2.5 0.00 4.50 1.00 3137.00 3144.00 24 0 7.0 0 0.00 7.00 4.00 3140.00 3144.00 36 0 4.0 4 0.00 4.00 2.50 3139.50 3144.00 36 0 4.5 -2.5 0.00 4.50 1.00 3121.33 3144.00 36 96 22.7 11.06 7.17 15.50 8.50 3123.42 3144.00 36 96 20.6 8.97 7.58 13.00 7.00 3125.83 3144.00 18 54 18.2 6.06 3.17 15.00 3.75 3128.42 3144.00 18 54 15.6 3.47 3.58 12.00 3.75 3137.00 3149.00 36 102 12.0 0.39 7.50 4.50 3.00 3141.50 3149.00 36 102 7.5 -4.11 7.50 0.00 0.00 3141.25 3149.00 30 78 7.8 -4.36 7.75 0.00 0.00 3141.50 3149.00 30 78 7.5 -4.61 7.50 0.00 0.00 3139.83 3149.00 36 102 9.2 -2.94 9.17 0.00 0.00 3140.00 3149.00 36 102 9.0 -3.11 9.00 0.00 0.00 3128.00 3149.00 30 78 21.0 8.89 12.00 9.00 8.50 3125.25 3149.00 24 72 23.8 11.64 12.75 11.00 4.25 3127.67 3149.00 24 72 21.3 9.22 10.83 10.50 4.50 3126.00 3149.00 30 78 23.0 10.89 13.00 10.00 3.50 0.00 0.00 30 42 0.0 0 0 0.00 0.00 0.00 0.00 30 42 0.0 0 0 0.00 0.00 0.00 0.00 30 42 0.0 0 0 0.00 0.00 3125.00 3149.00 24 72 24.0 13.5 13.25 10.75 3.50 3124.58 3149.00 24 72 24.4 13.92 13.42 11.00 3.75 3126.00 3150.00 24 66 24.0 13.5 11.00 13.00 4.00 3125.67 3150.00 24 66 24.3 13.83 9.33 15.00 1.75 0.00 0.00 30 54 0.0 0 0 0.00 0.00 0.00 0.00 30 42 0.0 0 0 0.00 0.00 3126.00 3150.00 24 72 24.0 10.42 13.00 11.00 3.00 3126.00 3150.00 18 48 24.0 10.42 11.00 13.00 2.00 3124.00 3150.00 36 102 26.0 15 18.00 8.00 2.25 3124.50 3150.00 30 90 25.5 14.5 9.50 16.00 4.50 3128.17 3150.00 30 60 21.8 8.25 13.33 8.50 3.00 0.00 0.00 30 42 0.0 0 0.00 0.00 0 3127.67 3150.00 24 60 22.3 8.77 14.33 8.00 4.00 3127.25 3150.00 30 78 22.8 9.17 12.33 10.42 5.75 3127.17 3150.00 36 108 22.8 12.25 12.83 10.00 3.25 3127.00 3150.00 36 96 23.0 12 15.00 8.00 2.50 3127.00 3150.00 30 66 23.0 9.42 11.00 12.00 3.00 0.00 0.00 30 54 0.0 0 0.00 0.00 0.00 3126.50 3150.00 24 60 23.5 9.92 13.00 10.50 4.00 3126.50 3150.00 24 60 23.5 9.92 12.50 11.00 2.50 3124.00 3150.00 30 84 26.0 15.42 18.83 7.17 2.00 3124.50 3150.00 30 84 25.5 11.92 15.50 10.00 4.00 3126.00 3150.00 24 72 24.0 13 12.00 12.00 3.50 PRICING PRECISION PRECISION PRECISION MAM AUGER ROCK BELL CONCRETE TOTAL PRICE PRICE PRICE PRICE PRICE 12.50 312.00 3.45 327.95 0.00 156.00 0.00 156.00 0.00 156.00 -24.16 131.84 0.00 624.00 -6.90 617.10 0.00 390.00 0.00 390.00 0.00 156.00 -24.16 131.84 25.10 1326.00 227.25 227.82 1806.17 26.53 1092.00 227.25 195.37 1541.15 6.34 585.00 49.50 39.48 680.32 7.16 585.00 49.50 29.43 671.09 26.25 468.00 279.00 -15.53 757.72 26.25 0.00 279.00 -85.41 219.84 23.25 0.00 123.75 -56.62 90.38 22.50 0.00 123.75 -59.32 86.93 32.10 0.00 279.00 -59.48 251.62 31.50 0.00 279.00 -62.12 248.38 36.00 1326.00 123.75 86.28 1572.03 31.88 663.00 110.25 74.20 879.32 27.08 702.00 110.25 57.50 896.82 39.00 546.00 123.75 107.85 816.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 33.13 546.00 110.25 75.92 765.30 33.55 585.00 110.25 78.82 807.62 27.50 624.00 83.25 69.02 803.77 23.33 273.00 83.25 71.30 450.87 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 32.50 468.00 83.25 69.02 652.77 22.00 312.00 33.75 38.82 406.57 63.00 351.00 279.00 186.36 879.36 28.50 702.00 202.50 124.02 1057.02 39.99 468.00 49.50 84.44 641.93 0.00 0.00 0.00 0.00 0.00 35.83 624.00 83.25 57.50 800.57 36.99 897.00 123.75 94.37 1152.11 44.91 507.00 330.75 137.13 1019.78 52.50 390.00 227.25 139.77 809.52 33.00 468.00 69.75 97.06 667.81 0.00 0.00 0 0.00 0.00 32.50 624.00 60.75 65.57 782.82 31.25 390.00 60.75 65.57 547.57 56.49 312.00 162.00 129.42 659.91 46.50 624.00 162.00 124.02 956.52 30.00 546.00 110.25 69.02 755.27 PIER DRILLING CALCULATIONS PLANNED QUANTITIES PIER BOTTOM TOP PIER BELL LF NO. ELEV ELEV DIA DIA 45 3136.0 3147.00 30 84 11.0 46 3136.0 3149.58 30 60 13.6 47 3136.0 3149.58 24 66 13.6 48 3136.0 3146.58 36 108 10.6 49 3136.0 3147.00 36 108 11.0 50 3136.0 3149.58 30 60 13.6 51 3136.0 3149.58 24 72 13.6 52 3136.0 3149.25 30 72 13.3 53 3136.0 3146.58 24 66 10.6 54 3136.0 3146.75 36 90 10.8 55 3136.0 3146.75 30 72 10.8 56 3136.0 3149.25 30 60 13.3 57 3136.0 3149.25 30 72 13.3 58 3136.0 3149.25 42 114 13.3 59 3136.0 3149.25 24 60 13.3 60 3136.0 3156.50 30 54 20.5 61 3136.0 3149.25 30 54 13.3 62 3136.0 3149.25 24 60 13.3 63 3136.0 3149.25 24 66 13.3 64 3136.0 3156.50 30 48 20.5 65 3136.0 3149.25 30 78 13.3 66 3136.0 3149.25 30 78 13.3 67 3136.0 3149.25 30 54 13.3 68 3136.0 3156.50 30 54 20.5 69 3127.8 3149.25 24 60 21.4 70 3127.8 3149.25 24 66 21.4 71 3127.8 3149.25 30 54 21.4 72 3127.8 3147.25 30 66 19.4 73 3127.8 3147.25 30 66 19.4 74 3136.0 3156.83 30 54 20.8 75 3136.0 3156.50 30 48 20.5 76 3136.0 3149.25 18 42 13.3 77 3136.0 3149.25 18 42 13.3 1067.2 INTERMEDIATE LIFT STATION 1 3140.3 3160.4 24 30 20.1 2 3140.3 3160.4 24 54 20.1 3 3140.3 3160.4 24 30 20.1 4 3140.3 3160.4 24 54 20.1 5 3140.3 3160.4 36 96 20.1 6 3140.3 3160.4 24 54 20.1 7 3140.3 3159.6 24 60 19.3 8 3140.3 3159.6 36 102 19.3 PAGE: 2 AS -BUILT QUANTITIES BOTTOM TOP PIER BELL LF LF AUGER ROCK ROCK ELEV ELEV DIA DIA CHANGE LENGTH LENGTH TIME 3123.00 3150.00 30 84 27.0 16 18.00 9.00 4.00 3123.75 3150.00 30 60 26.3 12.67 19.25 7.00 2.50 3126.00 3150.00 24 66 24.0 10.42 17.42 6.58 2.50 3130.67 3150.00 36 108 19.3 8.75 19.33 -0.00 0.00 3124.00 3150.00 36 108 26.0 15 18.75 7.25 4.50 3127.00 3150.00 30 60 23.0 9.42 14.00 9.00 3.75 3134.00 3150.00 24 72 16.0 2.42 16.00 0.00 0.00 3136.42 3150.00 30 72 A 13.6 0.33 13.58 -0.00 0.00 3128.00 3150.00 24 66 22.0 11.42 16.00 6.00 2.75 3123.67 3150.00 36 90 A 26.3 15.58 19.33 7.00 2.50 3127.17 3150.00 30 72 A 22.8 12.08 15.33 7.50 5.00 3136.42 3150.00 30 60 A 13.6 0.33 13.58 -0.00 0.00 3135.33 3150.00 30 72 14.7 1.42 8.25 6.42 2.50 3124.50 3150.00 42 114 25.5 12.25 20.00 5.50 7.50 3126.58 3150.00 24 60 23.4 10.17 16.42 7.00 2.75 0.00 0.00 30 54 A 0.0 0 0.00 0.00 0.00 3135.00 3150.00 30 54 A 15.0 1.75 15.00 0.00 0.00 3138.25 3150.00 24 60 11.8 -1.5 11.75 0.00 0.00 3136.00 3150.00 24 66 14.0 0.75 14.00 0.00 0.00 0.00 0.00 30 48 A 0.0 0 0.00 0.00 0.00 3135.25 3150.00 30 78 14.8 1.5 14.75 0.00 0.00 3135.17 3150.00 30 78 14.8 1.58 14.83 -0.00 0.00 3135.00 3150.00 30 54 A 15.0 1.75 15.00 0.00 0.00 0.00 0.00 30 54 A 0.0 0 0.00 0.00 0.00 3130.67 3150.00 24 60 19.3 -2.12 19.33 -0.00 0.00 3132.67 3150.00 24 66 17.3 -4.12 17.33 -0.00 0.00 3132.00 3150.00 30 54 A 18.0 -3.45 18.00 0.00 0.00 3132.67 3150.00 30 66 A 17.3 -2.12 17.33 -0.00 0.00 3134.75 3150.00 30 66 A 15.3 -4.2 15.25 0.00 0.00 0.00 0.00 30 54 A 0.0 0 0.00 0.00 0.00 0.00 0.00 30 48 A 0.0 0 0.00 0.00 0.00 3131.50 3150.00 18 42 18.5 5.25 18.50 0.00 0.00 3132.25 3150.00 18 42 --------- 17.8 4.5 17.75 ----------------------- 0.00 0.00 --------- 1239 ----------------------- 827 412.09 161 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 0.00 0.0 0 0 0.0 0 0.00 0.00 0.00 PRICING PRECISION PRECISION PRECISION MAM AUGER ROCK BELL CONCRETE TOTAL PRICE PRICE PRICE PRICE PRICE 54.00 624.00 162.00 140.20 980.20 57.75 390.00 60.75 132.11 640.61 43.55 390.00 83.25 69.02 585.82 67.66 0.00 339.75 82.77 490.18 65.63 702.00 339.75 186.36 1293.73 42.00 585.00 69.75 97.06 793.81 40.00 0.00 110.25 13.80 164.05 40.74 0.00 94.50 -4.53 130.71 40.00 429.00 83.25 55.22 607.47 67.66 390.00 202.50 191.48 851.64 45.99 780.00 94.50 95.23 1015.72 40.74 0.00 49.50 -4.53 85.71 24.75 390.00 94.50 7.23 516.48 80.00 1170.00 371.25 243.09 1864.34 41.05 429.00 110.25 65.02 645.32 0.00 0.00 0.00 0.00 0.00 45.00 0.00 31.50 10.78 87.28 29.38 0.00 60.75 -15.53 74.60 35.00 0.00 83.25 0.00 118.25 0.00 0.00 0.00 0.00 0.00 44.25 0.00 31.50 8.09 83.84 44.49 0.00 31.50 8.95 84.94 45.00 0.00 31.50 10.78 87.28 0.00 0.00 0 0.00 0.00 48.32 0.00 60.75 -19.81 89.27 43.32 0.00 83.25 -33.61 92.96 54.00 0.00 31.50 -45.30 40.20 51.99 0.00 69.75 -52.52 69.22 45.75 0.00 69.75 -74.95 40.55 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 37.00 0.00 22.50 17.47 76.97 35.50 0.00 22.50 14.56 72.56 $2,387 $25,077 $7,706 3403.30 $38,574 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PIER DRILLING CALCULATIONS PIER BOTTOM TOP NO. ELEV ELEV 9 3140.3 3159.6 10 3140.3 3149.4 11 3140.3 3149.4 12 3140.3 3149.4 MAIN LIFT STATION 1 3136.0 3149.25 2 3136.0 3146.25 3 3136.0 3146.25 4 3136.0 3146.25 5 3136.0 3149.25 6 3136.0 3146.25 7 3136.0 3146.25 8 3136.0 3146.25 9 3136.0 3146.25 10 3136.0 3146.25 11 3136.0 3146.25 12 3136.0 3146.25 13 3136.0 3146.25 14 3127.0 3136.00 15 3127.0 3136.00 16 3127.0 3136.00 17 3127.0 3136.00 PLANNED QUANTITIES PIER BELL LF DIA DIA 24 60 19.3 24 66 9.1 30 90 9.1 24 66 9.1 205.6 24 24 24 24 24 24 30 30 24 24 30 30 24 24 24 24 24 48 13.3 48 10.3 66 10.3 66 10.3 48 13.3 54 10.3 84 10.3 84 10.3 54 10.3 48 10.3 78 10.3 78 10.3 48 10.3 48 9.0 66 9.0 66 9.0 48 9.0 175.3 BOTTOM TOP ELEV ELEV 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 3134.08 3150.0 3135.00 3150.0 3138.58 3150.0 3135.75 3150.0 3135.00 3150.0 3134.00 3150.0 3134.75 3150.0 3135.00 3150.0 3135.00 3150.0 3134.17 3150.0 3134.17 3150.0 3135.00 3150.0 3135.00 3150.0 3120.50 3136.0 3121.00 3150.0 3123.80 3136.0 3120.00 3136.0 AS -BUILT QUANTITIES PIER BELL LF DIA DIA 0 0 0 0 24 24 24 24 24 24 30 30 24 24 30 30 24 24 24 24 24 0 0.0 0 0.0 0 0.0 0 0.0 0 48 15.9 48 15.0 66 11.4 66 14.3 48 15.0 54 16.0 84 15.3 84 15.0 54 15.0 48 15.8 78 15.8 78 15.0 48 15.0 48 15.5 66 15.0 66 17.5 48 16.0 259 LF AUGER ROCK ROCK CHANGE LENGTH LENGTH TIME 0 0.00 0.00 0.00 0 0.00 0.00 0.00 0 0.00 0.00 0.00 0 0.00 0.00 0.00 ----------------------- ----------------------- 0.00 _ 2.67 15.92 0.00 0.00 4.75 15.00 0.00 0.00 1.17 11.42 0.00 0.00 4 14.25 0.00 0.00 1.75 15.00 0.00 0.00 5.75 16.00 0.00 0.00 5 15.25 0.00 0.00 4.75 15.00 0.00 0.00 4.75 15.00 0.00 0.00 5.58 15.83 -0.00 0.00 5.58 15.83 -0.00 0.00 4.75 15.00 0.00 0.00 4.75 15.00 0.00 0.00 6.5 15.50 0.00 0.00 6 15.00 0.00 0.00 8.5 17.50 0.00 0.00 7 16.00 ----------------------- ----------------------- 0.00 0.00 PRICING PRECISION PRECISION PRECISION KAM AUGER ROCK BELL CONCRETE TOTAL PRICE PRICE PRICE PRICE PRICE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 39.80 0.00 27.00 18.43 85.23 37.50 0.00 27.00 32.79 97.29 28.55 0.00 83.25 8.08 119.88 35.63 0.00 83.25 27.61 146.48 37.50 0.00 27.00 12.08 76.58 40.00 0.00 40.50 39.69 120.19 45.75 0.00 162.00 53.92 261.67 45.00 0.00 162.00 51.23 258.23 37.50 0.00 27.00 32.79 97.29 39.58 0.00 126.00 38.51 204.09 47.49 0.00 27.00 60.18 134.67 45.00 0.00 126.00 51.23 222.23 37.50 0.00 27.00 32.79 97.29 38.75 0.00 27.00 44.86 110.61 37.50 0.00 83.25 41.41 162.16 43.75 0.00 83.25 58.67 185.67 40.00 0.00 27.00 48.32 115.32 676.8 0.0 1165.5 652.57 2494.86 BLACK & VEATCH 5728 LBJ Freeway, Suite 300, Dallas, Texas 75240, (214) 770-1500, Fax: (214) 770-1549 Lubbock, Texas Southeast Water Reclamation Plant - Contract 2 SRF 3102-002 City of Lubbock Post Office Box 2000 Lubbock, Texas 79457 Subject: Attention: Mr. Dan A. Hawkins Gentlemen: BU Project 17578.420 B&V File G-2.02 (BU-100) January 11, 1993 Letter No. CP-39 Pier Adjustment at Headworks and Main Lift Station We have received Mortenson's letter dated December 7, 1992, containing their proposal for additional pier excavating and concrete costs at the Headworks and Main Lift Station. This letter responds to their proposal and discusses the following items: • Describe the original pier requirements which formed the basis for the bid. • Identify the Contract provisions that provide for adjustment to pier lengths. • Explain why pier revisions were needed. • Discuss the options that were reviewed. • Describe the recommended pier changes. Original Pier Requirements The Headworks and Main Lift Station structures are long, narrow, and contain multiple levels that bear on different elevations in the soil. To minimize differential settlement that could occur with the multiple bearing levels, the Contract Documents required the Contractor to install drilled piers with flared bells on the bottom. Lubbock, Texas Mr. Dan A. Hawkins Page 2 B&V Project 17578.420 January 11, 1993 Basis of Bid and Contract Provisions to Adjust Pier Lengths Two soil borings were obtained in the area of the Headworks structure to characterize the soil conditions. From these borings, a soils profile was developed to permit us to approximate a suitable bearing elevation for the base of the piers. In order for all Bidders to bid on the same lengths of piers, the approximate bearing elevation for each pier was indicated on the drawings. Because the top elevation of suitable bearing material can vary between borings due to subsurface hills and valleys in the formation, we include a standard provision in the specifications to make an adjustment in the Contract Price for increasing or decreasing the total length of piers. This provision was included in Section 02220, paragraph 17, of the specifications. Additional soil borings could have been obtained to further identify the elevation of the suitable bearing material. However, this would not ensure that all the subsurface features of the suitable material would have been found (i.e., hills, holes, etc., in the formation, boulders, valleys, etc.). To precisely identify the top elevation of the suitable bearing material, it would have been necessary to totally remove the surface soils, which was not practical or economically feasible. Based on the Contractor's price for structure excavation, removing the surface soils at the Headworks would have cost approximately $70,000. This approach is not practical and would have required an alternate and more expensive foundation design. Description of Need for Additional Pier Requirements During the initial pier drilling operations at the Headworks structure, suitable bearing material was found at an elevation higher than the pier bearing elevations indicated on the drawings. A subsurface hill of the suitable material had been encountered. Normally, the piers would be shortened and the pier bells installed to bear at the top of this suitable bearing material. However, terminating the piers at this higher elevation would have resulted in the pier bells conflicting with underslab piping, and would have made excavation of the grit pump pit unfeasible. To avoid these conflicts, the piers could be drilled into the suitable bearing material to the elevations on the drawings but at a rate substantially slower than through the overlying softer strata. In addition, flaring the bells required on the bottom of the piers in this hard strata was not possible. Therefore, a change in the original drilled pier concept was needed. Lubbock, Texas Mr. Dan A. Hawkins Options Page 3 B&V Project 17578.420 January 11, 1993 Once this need for a change was identified, we met with the Contractor and Parkhill, Smith, and Cooper in Lubbock on September 15, 1992, to discuss available options. The four options that were discussed included (1) deleting the piers; (2) considering larger diameter piers without bells to eliminate the flaring in the hard strata; (3) deleting some of the piers and constructing footings; and, (4) using the same pier design, drill through the top layer of suitable bearing material to a location where the pier bells could be flared and still be on top of a second suitable bearing strata. Deleting the piers, Option 1, was dismissed as a viable option due to the structure configuration and increased potential for differential settlement. Option 2, using full diameter piers, was not feasible since the larger diameter pier shaft would still result in a conflict with underslab piping and the grit pit excavation. The third option, deleting some piers and using footings, would have required substantial engineering design revisions and considerable lead time to order additional materials, possibly resulting in several weeks or even months of delay. The footing design would be more labor intensive and would require substantially more concrete and reinforcing steel than the drilled piers. Due to the high cost and schedule delay associated with this option, it was not considered further. Recommended Option The fourth option was recommended and implemented since it was the most feasible, economical, timely, and complete solution. Under this option, the piers were drilled through the initial suitable bearing elevation to a second suitable bearing strata where the pier bells were then installed. Basis of Contractor's Proposal The Contractor's cost proposal is based on two items: The amount for additional production time to drill through suitable bearing material that was above the bearing elevations indicated on the drawings. The additional drilling, concrete, and reinforcing for the length of piers below the drawing elevations. Lubbock, Texas Mr. Dan A. Hawkins Page 4 B&V Project 17578.420 January 11, 1993 The drilling through the suitable bearing material was not originally required by the Contract Documents, since the pier bells were to terminate at the top elevation of this material. We have reviewed the Contractor's request for a contract adjustment of $38,546 and it appears justified and reasonable. Please contact us if you have any comments or questions. Ve, y tr ly yours, Robert G. McCollum, P.E. Project Engineer bk Enclosures cc: Mr. Henry P. Day Mr. Steve Keeling Mr. David Gatto