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HomeMy WebLinkAboutC2007-409 - 11/14/2007 - NAAI~ENDI~ENT No. ~ D NTRACT FOR ENC~I~EERINO ER11iE The pity of corpus Christi, Texas, ~.~~ Box ~7~, corpus Christi, Texas 7S4~g-g~T~ hereinafter called "pity"and HDR Engineering, Inc., ~~11 South IH~, Suite egg, Austin, Texas 1841 hereinafter called "Engineer", hereby agree to the following amendment to the contract for engineering services as approved April 1 ~ , ~aaa, ~Ilotion No. ~g00-1 ~ ~ , amended January o, 20g ~ , Ivtion ~aa ~ -D4G, and March 1, 2aa 1, Lotion ~Og 1 ~~ a~, adrr~inistratively amended June ~, X001, and administratively amended July , ~Og~, and August ~ ~ , ~D01, Lotion X001-320, and November 1 ~, ~Oa, Motion X001-4~ G and administratively approved March 10, 200, and administratively approved April ~1, 2000, and ~lotian ~~0~-~43 approved February ~ , 2001; Section ll, SCOPE OF SERVICES, PHASE Il, shall be modified by the addition of Section Il.B,1G to Additional Services - Rincon Diversion Pipeline, BASID SERVICES to read: B. Additional Services • ~ . Operating Plan -Prepare an operating plan for the Rincon Bayou Diversion Project Pipeline and Pump Station A detailed scope of work and task list is attached as Exhibit A. The Engineer will perform and complete the following tasks as part of Task 1 FEE FOR SER111ES AUTHORIZED The City will pay the Engineer a total fee not to exceed ~ ,10,10 for providing all services authorized by the contract Engineer vwrill submit monthly statements for services rendered. The pity will make prompt monthly payments in response to Engineer's monthly statements. Far services provided in Section ll.A, payr~ent gill be made based upon the Engineer's estimate of the portion of work completed. however, the total of the payments made for Basic Services gill not exceed 95°l~ of the total authorized fee until all deliverables specified in Exhibit A are accepted and approved by the pity Engineer. Far services provided in Sections II. B.1 and I I. B.O, payment will be made based upon the hourly rate for regulatory assistance set forkh in Exhibit E-~ , The Engineer will be reimbursed at actual costs plus ten percent ~1 D°lo} far airfare, ground transportation, lodging, and per dier~ meal expenses. The Engineer may be required and authorized by the City Attorney to retain the services of sub-consultants. The Engineer will be reimbursed any sub-consultant, computer modeling, copying and mapping casts authorized by the City Attorney at actual cast. Travel expenses will be will be documented by photocopies of receipts and invoices. ~OU7-4~9 11I~ 4147 Page ~ of 7 HD~ ~n~ir~erin, Ins. uCONlPipelinel~4~Arnd1 oD~~ratingPlan,doc Far services provided in e~tian ! 1.8.2, , 4, ,~, ~.b, ~ and 8 payment gill be made based upon a fixed fee amount set f~rkh by the Summary of Servioes and Fees listed as Table ~ -Summary of Fees, For services provided in II.B.~ and II.B~ ~.f , payrnent will be made based on the peraentage of construction complete as evidenced by the approved contractor's r~onthly progress payments. Summary of Services and Fees are listed as Table 1 - Sumr~ary of Fees on the following page. A detail of fees by sub-tasks are attached to the original contract as Exhibit E. Ta~l~ ~ - ur~marv of Fees: Task Description Fee Ori final Contract I I.A. ~ U date of Firm Yield 22Q, ~ 40 II.A.2 Reservoir Operating Plan 81,~QQ II.A,B Flaad Release Model 79,00 II.A.4 vllater C~ualit and Treatment Model 78,500 iI.A.S Effluent Reuse stud 48,QOa TOTAL $516,840 Amendment No, ~ Il.B.1 Rinoon Diversion Project $13a,aaQ AMENDMENT Nv,1 TOTAL $~ 30,000 Amendment No. 7 II.B.2 Design Phase services -Nueces River Overflow Channel Design $28,00 II.B~3 Bid Phase ervice~ -Nueces River Overflow Channel Design $12,000 II.B.4 Construction Phase services -Nueces River Overflow Channel Design To be negotiated II.B,5 Design Phase services - Rinoan Diversion Pipeline To b negotiated II~B~~ Bid Phase Services - Rinoan Diversion Pipeline To be negotiated ll.B.~ Construction Phase Services - Rinoan Diversion Pipeline To be negotiated AMENDMENT No. ~ TOTAL $44,000 Amendment No. II.B. Effluent Reuse Estimates $,QQ0 AMENDMENT No. TOTAL $3,000 Amendment No.4 ~I.B,4 Construction Phase Services -Nueces River Overflow Channel Design '12,5fi0 AMENDMENT No. 4 TOTAL $12,560 Amendment No. II.B.S Design Phase Services - Rinoan Diversion Pipeline II.B.~.a Basic Design Services $280,000 II.B.S.b Additional Design Services $90,000 II.B.6 Bid Phase services -Rinoan Diversion Pipeline $16,000 II.B.7 Construction Phase Services -Rinoan Diversion Pipeline To be negotiated II.B.9 Rinoan Diversion Project $50,000 AMENDMENT No. 5 TOTAL $4~5,QD0 Page ~ of l H:1H~ME1KEVINIGEN1vVATERIRINCONIPipelinelAEAmd100peratingPlan.dac Alllendment ND. Il.B.1,a landscape Architecture Design $3,500 II.B~ 1.b vVetlands Determination 5300 II.B.1.c Archeological Services $8,200 II.B. ~ ~d Additional Design ~ 0,000 II.B. ~ .e Additional Permitting $30,000 II.B.1.f Land Acquisition $30,004 II,B~9 Choke Canyan Reservoir Outlet vlforks Channel Oage Outflow Record $20,004 II.B10 Quality Control Verification Accuracy of Release Rates $15,000 I I~ B, ~ ~ Evaluatio ity's Oround~rater 1vUells X9,000 II.B,12 Nueces Estuary Advisory Council, Rincon Diversion Pra~ect, Drought Analysis $50,000 Amendment No. ~ Total ~ 8~ ,000 Amendment No. ~ Rincon Diversion Pipeline II.B.S.b. vEl, I~, ~ ~ Additional Design Services $13,790 II.B.7 Construction Phase Services -Rincon Diversion Pipeline 00,050 IJ~B~7h~ Construction ObervatiOn 55,494 II.B. ~ 3.a Corr~missioning Services x,500 II.B.13.b Maintenance Quarantee Services 5,770 Subtotal ~-Rincon Diversion Pipeline 180,500 Hondo Cree k Bridge Il.B.14.a Oeotechnical Services 8,400 II.B.~4.b Permitting 2,440 II.8.14.c Surveying 1,500 II.B.14.d Design 64,590 II,B~14.e Bid Phase Services 2,000 II.8.14.f Construction Phase Services 34,150 Subtotal-Honda Creek Bridge 112,240 Amendment Nv. ~ Total 292,840 Amendment IVo. 8 I I. B.7h. Construction Observation -65,490 Il.B.S.xi Redesign ~i~ctrical building 13,500 Ii.B.15 Additional Meetings 15,000 Amendment No. 8 `36,990 Amendment IVo. 9 II,B.5.xii 1vlvind Sturm Certificate 7,150 116.5.xiii 1arning Buoy System 5,500 Il.B.7.h Construction Phase Services -Additional Site Visits and Coordination 9,340 II.B.15 Additional Meetings 15,000 Amendment No. 9 35,990 Amendment I~o.14 II.B.16 Operating Plan 37,040 Amendment No. ~0 37,000 H:1HONiE1KEVINIEN1v~lATER1RINC~NIPip~linelAEAmd 1 Opera#ir~gPl~n.doc Page 3 ~f 7 TOTAL $1,G 1 ~, ~4~ Ali other terms ar~d conditions of the Aril 1 ~, ~~~~ contract between the Dity and Engineer, and of and amendments to that contract, which are not s~ecificall~ addressed herein shall remain in fill force and effect. CITY OF ORPIJ HRITI HDR ENS EERIN, IIV, ~~ `A C .Escobar Date Date Interim Assistant pity IUlanager ATTE >> J 4 ~~ 7 Armando Chapa, Date City Secre#ary RE~IIENDED: ~tevin Stowers ~~ Director of Engineering -1 r o~ d7 Date APPROVED AS TO FOR ~~~v'1 Assistant City Attorney Date ~i~o~o~ ~~ ~ Page ~ of ~ H:1HpME1KEVi N1GEN11NATERIRINCONIPipelinelAEAmd~ OOpera~ingPlan.dac ~xh~~~t A City a~` Corpus C~rristi Technical Support for developing an ~peratlon Plan For tf~e Rincon bayou Diversion Project Pipeline and Pump Station Tank ~fi Detailed Scope The City of Corpus Christi City} water supply system consists of Choke Canyon Reservoir ~CCR}, Lake Corpus Christi ~LCC} and Lake Texana ~LT~, which are operated together to provide water to City of Carpus Christi and its customers, The City operates CR and LCC under the provisions of the Texas Commission on Environmental Cuality's {TCEQ} X001 Agreed Order Agreed Order}. This Agreed Order establishes guidelines for how the reservoirs are to be operated and provide freshwater inflows to the Nueces Bay and Estuary ~B&E}. The Agreed Order specifies a monthly inflow target far the B&E that is to be satisfied by the pass-through of inflow from the CCRILCC system and return flaws to Nueces Bay and other receiving estuaries. This monthly target varies depending an the combined reservoir system volume of CCR and LCD. The amount of water passed through to the B&E may be fens than the targets depending an the amount of inflow to the reservoir system and the salinity levels in the bay. For October ~g07, the City is eligible for a ~S~Io target reduction, as specified in the Agreed Order, based on ten consecutive days of daily salinity average recorded at the Nueces Bay salinity monitoring station being at least 15 psu below the salinity Upper Bounds. The Agreed Order includes a provision section ~,f,~} that allows for a portion of the monthly pass-through to be delivered by a pipeline. . f.~ Corrsfr[~c~ ar~d operafe a cor~veyarrce foci#i#y fo del#ver up fo 3, 400 acre-fee# per ~rorr#h of required Reservo#r yste~n r`~ass-throughs" a~~rect#y from fhe ca#a~#er~ Poo# rr~to fhe Upper ~r'rrcon Ba]IO~.#, ~ . The Agreed Order, however, does not specify haw the pipeline is to be operated to satisfy B&E requirements. The Rincan Diversion Pump Station is essentially complete end an operating plan is needed. The purpose of this scope is to evaluate several operating scenarios for the pipeline and provide a recommendation to the City far a preferred operating scenario far the pipeline. if during the course of developing the preferred operating scenarios, it is beneficial to recommend changes to the Agreed Order, these changes will be identified and presented in the recommendation to the City, The scope presented below includes two meetings with the City during the course of the study to coordinate the work effort, Meetings beyond this level shall be reimbursed as additional services at S,SOa per meeting. The final deliverable for this project will be a technical memorandum detailing the results of the study. Five tasks have been developed to address the issues of this study. These tasks are outlined in the fallowing paragraphs. TASK ~~.1 ~ Data Collection The City has been operating its water supply system under a version of the Agreed Order since the early ~ 99o's. Data will be collected from existing sources since the order has been in effect, to include reservoir inflows, reservoir pass-thraughs and water supply releases from LCC, B&E targets, B&E inflows, and other pertinent information. This data will include UOS streamgage data, including the Nueces River at the Mathis gage and at Calalien gage. The data will be compiled in a spreadsheet and used to facilitate the rerr~aining tasks. Page ~ of T H:IHQME11~EVi~1ENIVVATER1RiAlCDNIPipelir~elAEAmd 10~peratingPian.~oc The City of Corpus vvater Bupply Model ~Model~ simulates the City's water supply system and Agreed order requirements. The modeled Laver Nueces River streamflow values below lrCC from X994 to ~OD3 will be reviewed and compared with measured flaws between the Nueces River at Mathis and Caiallen gage and differences will be identified. If the streamflow values in the Model need revision, an additional services amendment will be prepared for the City. After data collection, a meeting will be conducted to get input from the City regarding their ideas on potential operating scer~arias. TAi~ ~ 6.Z - Operating cenari~ development The data collected in Task ~ will be used to develop and evaluate up to faun potential operating scenarios for the pipeline. dome of these scenarios include: Operating the pipeline to rr~inimi~e operating casts. • Operating the pipeline to deliver the first 3,000 acft of any required pass-through. Operating the pipeline in a manner that delivers the required pass-through, within the capabilities of the facility, in pulses, or large slugs, aver various periods of time, • operating the pipeline to deliver the rerr~aining monthly B&E inflow requirements, within the capabilities of the facility, at the end of the month. If more than four scenarios are eleoted far evaluation, the additional scenarios beyond four will be evaluated under a separate, additions! services agreement. scenarios will be developed with input frorr~ the city to identify the key goals each strategy should accomplish ~i.e, economic, political, and~or biologic.} The Rincan Bayou Diversions} Pump station and Pipeline system is comprised of three 350 horsepower mixed flaw submersible pumps and approximately two miles of pipe. The system will transfer a maximum of 5,000 gallons per minute ~~65 acftJday or ~ 8,004 acftJmo~ from the Nueces River to the Rincan Bayou with all three pumps operating. The system's pumping rate is variable only to the extent that one, two, or three pumps can be operated simultaneausly~ vllith two pumps operating, the system will pump at approximately ~4G,aaa gallons per minute X203 acftlday or ~ G,~00 acftlmo~}The pump station is in the process of being equipped with communication and control equipment that will allow complete integration into the City's CADA system. These design specifications will be considered during the development of the Rincon Pipeline operating scenarios. TASK ~ 6.3 - Operating cer~a~ia Recvmrne~dation Task 3 will involve simulating each of the scenarios developed in Task ~. This will produce several "what- if'situations that can be used to illustrate the various operating scenarios had they been in place since the 'rnitial Agreed order issued in 1 g9~. Analysis of these results should provide the appropriate information necessary to select a recommended operating plan forthe pipeline. The CP&L energy rate structure will be evaluated and analysis performed to determine the most efficient operating strategy with respect to pumping casts. These results will be presented to the City in a meeting where a reaommen~ed strategy will be identified. TASK ~ 6.4 -Alternative Operating Procedures and Identification of Potential Modifications to the Agreed Order During the course of this project it is anticipated that carne additional benefits of operating the Rincon pipeline may be identified that da not constitute an operating scenario by themselves. For example, the pipeline could be used to occasionally remove high salinity waterfrom the Calallen pool during draught conditions. Normal pipeline operations will likely be limited to 1 foot of drawdown to minirr~ize water quality cancerns~ A summary of potential additional benefits of the pipeline will be prepared and included in the technical memorandum. Page6ofl H;1H~MEIKEVI N~1GEN11IVATERIRI N~aNIPi~elinelAEAmd~ ~O~e~atingPfan,d~c In the process of developing and selecting operating scenarios for the pipeGr~e, potential modifications to the Agreed order may be identified, These potential changes to the Agreed order will be discussed with the City and included in the technical mer~orandum for consideration. Meetings with City Council, Nueces Estuary Advisory Council andlor TCEQ to discuss the operating plan, potential modifications to the Agreed order, or other issues wiCl need to be negotiated with the City in an additional services agreement. TAS~C ~.S - ~Ileetings and Technical I~e~nv Twa meetings with the City are anticipated far the development of the Rincon Pipeline operating plan. The first meeting will occur early on in the process to get input from the City regarding their ideas on potential operating scenarios, and a second meeting tewards the end of the project to present the results and a recommended operating scenario. A technical memorandum wilt be provided to the City describing data collection, development of up to Maur operating scenarios, the recommended operating scenario, any recommended changes to the agreed order, and other additional operating alternatives identified during the course of this study. TAi~ ~fi.B ~ Additional Services In the event that this project requires additional worm not otherwise provided in the agreement, a work order will be negotiated with the City far additional services to be performed, Upon receipt of the City's native to proceed, these services will be provided. estimated Schedule; 4 months rafter notice to proceed Estimated Cast: ~7,OOD Page l of ~ H:1i•kQME1K~vIN~EN1vVATER1Rl NCDNIPip~rinelAEAmd~ a~~eratingPiar~.doc ~ 4 + ' ~ ~ ~ ~ r CITY ~~ i*DRPUS CFfR~sT~ ~~L~URE ~p iNT~R~~" Ci#y ~~ Corpus Chris#i Ordinance ~~1 ~~, as arner~ded, requires air persons ar firn seeking to da bs~siness w the City to provide the foilowing infonrnafian. every question must be answered. xf the quion is not applicabie, ans~+rer with'~IA*. FARM NAI~l~: ~ ~ ` .~~'~' ~ FiRl~ is: ~. ~orpora~io~ ~. Partnership a ~. dole owner v 4. Assoation ~ ~. ether v DIL~~C L~~J~T~ON !f addi~onai space i necessary please use the reverse side of this page or attach separate sheep ~ . #a~e names a~ ~ "empyee" of the pity of Corpus Christi having an "o~rnetshxp interest" cans~ing °l~ ar mare of the ownership in the above named "frrm". Name ~ Job T'~e and City Department (~ known} ~. Tate the ~ oi` "~" ~ City of Corpus ~hrish having an "ownership infest" constitu~ng 3°I~ ar mare the ownership in tine above named "arm". Name Title ~, Std the names ~ each "boat+d n~mbe~' of the Cry DrpL~s Christi having an "ownership ir~tet'" constitng ~°~ or more a~ the ownership in the above named "firm". Nye ~ ~ Board, Commiss~n of Comrnee . 4. Sias trie names each employee or ~r of a "cansui~ fit the City of Co~pusrChristi who worked an any mater reed '~ suh~ect of this canfiract and has ~`ownship inters' constituting 39~ of more of the ownership xn # above Warned "hr~n". Name Conu~t ERI~F~CAT~ 1 certify that aE~ in#ormat~n provided true and correct as of the date oi~ this s~tement, that ~ have not ~nowingiy v~hheld ~sdosure of any. ` ~ of and that suppEementei e~nents w~~~ imi' ubm~ted to the qty ~f corpus ~hris~, Texas as changes occur. .. C'-e n Person. ~' ~ rt ~ Tie. ~!~ ~~ {Type or } ~ l • Signature of erng. person. date.