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Contract 49049-A5
CSC No.49049-A5 AMENDMENT No.5 TO CITY SECRETARY CONTRACT WHEREAS, the City of Fort Worth (CITY) and CDM Smith, Inc. , (ENGINEER) made and entered into City Secretary Contract No. 49049, (the CONTRACT) which was authorized by M&C C-28213 on the 2nd day of May, 2017 in the amount of$1,570, 965 . 00;and WHEREAS, the CONTRACT was subsequently revised by:Amendment Number 1 in the amount of $885 ,755 .00 which was authorized by M&C C-28857 on September 18, 2018, Amendment No. 2 in the amount of $71,993 . 00 which was administratively authorized on February 7 , 2019, Amendment No. 3 in the amount of $114, 939.00 which was authorized by M&C 20-0159 on April 7 , 2020 and Amendment No. 4 in the amount of$705,000.00 which was authorized by M&C 20-0346 on May 19, 2020;and WHEREAS,, the CONTRACT involves engineering services for the following project: Village Creek Water Reclamation Facility Grit Removal Process. WHEREAS, it has become necessary to execute Amendment No. 5 to the CONTRACT to include an increased scope of work and revised fee. NOWTHEREFORE, CITY and ENGINEER, acting herein by and through their duly authorized representatives, enter into the following agreement, which amends the CONTRACT: 1. Article I of the CONTRACT is amended to include the additional engineering services specified in the proposal attached hereto and incorporated herein. The cost to City for the additional professional services to be performed by Engineer totals $699,217 .00 . 2 . Article II of the CONTRACT is amended to provide for an increase in the fee to be paid to Engineer for all work and services performed under the Contract, as amended, so that the total fee paid by the City for all work and services shall be an amount of $4,047,869.00 . OFFICIAL RECORD CITY SECRETARY Page -1- FT.WORTH, TX 3. All other provisions of the Contract, which are not expressly amended herein, shall remain in full force and effect. EXECUTED and EFFECTIVE as of the date last written by a signatory, below. APPROVED: ENGINEER City of Fort Worth CDM Smith' Inc. Dana a andaff 1 °"9("s/ UL." Dana Burghdoff ct9,202009:38CDT) Dana Burghdoff Douglas L. Varner, P.E. Assistant City Manager Senior Vice-President Oct 9,2020 DATE: DATE: 10/01/2020 APPROVAL RECOMMENDED: Cl�cs�lLs�-tfa�r�ef- Christopher FNrder(Oct 2,202016:57CDT) Christopher Harder, P.E. Director, Water Department Contract Compliance Manager: By signing, I acknowledge that I am the person responsible for the monitoring and administration of this contract, including ensuring all performance and reporting requirements. 10/02/2020 Farida Goderya, P.E. Senior Project Manager APPROVED AS TO FORM AND LEGALITY: M&C: 20-20-0700 Date: 09/22/2020 DBlack(Oct 8,2020 13:18 CDT) 1295 #• 2020-655950 Douglas W. Black Senior Assistant City Attorney poo4pRa 0 o& ooa 0l_*_ d ATTEST: l�o° Pvo oO�=d0 0��0`l C70`1G' 1 o d 'for Ronald P.Gonzales(Oct 9,2020 09:56 CDT) �P� o0 o 00 o t7 Mary J. Kayser aa�nEXpSa�p City Secretary OFFICIAL RECORD CITY SECRETARY Page -2- FT.WORTH,TX CDM Smith 801 Cherry Street,Unit 33,Suite 1820 Fort Worth,Texas 76102 tel:817 332-8727 August 25,2020 Farida Goderya,PhD,PE Fort Worth Water Department 200 Texas Street Fort Worth,Texas Subject: Village Creek Water Reclamation Facility(VCWRF) Grit Removal Process City Project No. 100075; CSC No.49049 Amendment No. 5 Proposal- South Flow Lift Station (LS) Redesign Dear Farida: Enclosed is CDM Smith's amendment proposal for redesign services related the Village Creek Water Reclamation Facility South Flow Lift Station Project,City Secretary No.49049-A1.The details are identified in a letter dated August 7,2020. The total requested amount of this proposed amendment is$699,217.A summary of total contract amount is provided below. Original Contract Amount $ 1,570,965 Approved Amendment No. 1 (Lift Station Design) $ 885,755 Approved Amendment No. 2 (Grit Facility Physical Modeling) $ 71,993 Approved Amendment No. 3 (Additional Grit Facility Design/LS Physical Modeling) $ 114,939 Approved Amendment No.4 (Grit Facility Construction Phase Services) $ 705,000 Contract Amount to Date $ 3,348,652 Requested Amendment No. 5 (Lift Station Redesign,PDR, 30%&60%) $ 699,217 Revised Contract Amount $ 4,047,869 Please let me know if you have any questions. Sincerely, Amy Robinson,PE,BCEE CDM Smith Inc. cc: Doug Varner,CDM Smith Stacy Barna,CDM Smith WATER+ENVIRONMENT+TRANSPORTATION+ENERGY+FACILITIES I CD Smith 8o1 Cherry Street,uril 33,Suite 1820 Fort Worth,Texas 76102 tel:817 332.9727 August 7,2020 Farida Goderya,PhD,PE Fort Worth Water Department 200 Texas Street Fort Worth,Texas Subject: Village Creels Water Reclamation Facility CSC No.4049-A1 Revision 1: South Flow Lift Station Amendment Proposal Dear Farida: Enclosed is CDM Smith's amendment proposal for design services related the Village Creek Water Reclamation Facility South Flow]rift Station Project,City Secretary No.4049-A1.The proposed design services include the following. 1.0 Design concept changes that have been completed to date and included in the preliminary design report(PDR)and 60%drawings submitted April 17, 2020. 2.0 Additional scope items requested by the City. 3.0 Value engineering(VE) options and risk assessment for VE Option B. 4.0 Update PDR for VE Option B-3 per attached drawing. 5.0 Update 60%design for VE Option B-3 per the attached drawing. 6.0 Biweekly coordination meetings with the City, 7.0 Bid phase services for additional scope items identified in item 2 above. PHASE 1 — PRELIMINARY DESIGN 1.0 Preliminary Design Concept Changes Design scope changes were made during the preliminary design phase due to changes in the lift station design concept,The following items changed from the original design scope document.A summary of these changes is presented below, a Lift Station relocation to southwest corner of plant. ■ Different screen technology. 40 WATER r ENVIRONMENT i TRANSPORTATION I ENERGY i FACILITIES _ 1 CDM Smith E<arida Goderya, PE,PhD August 7,2020 Page 2 ■ Gravity and force main alignment changes. ■ Additional geotechnical investigation for tunneling design. Lift Station Relocation !After CDM Smith developed conceptual layouts of the lift station, CDM Smith evaluated the site around Box C and determined that the area near Box C was not a feasible location due to existing utilities,site constraints,and access for screenings disposal.CDM Smith identified limits of available space for the proposed lift station and presented alternative layouts north of Box C inside the plant levee as part of the South Flow Lift Station Draft Technical Memorandum presented to the City October 28,2019.At the review meeting,additional alternate locations were discussed,and the City chose to locate the lift station in the southwest corner of the plant site where there are minimal utility conflicts and ideal access to the lift station for screening disposal,proximity of existing facilities (i.e.service water,electrical,I&C, odor control,etc.).Locating the lift station in the southwest corner as shown in the PDR and 60% design drawings required the following design concept changes. ■ Gravity and force main design (see 1.3 below for details). ■ Electrical and instrumentation and controls design-- design concept changed due to proximity of lift station to existing substations and admin control room. Screen Evaluation and Design The original scope for screen design was a Bosker type screen with static bar racks and a clam type cake on a hoist and trolley requiring minimal equipment and design effort.After CDM Smith and the City completed site visits to Trinity River Authority(TRA)Central Regional Wastewater System (CRWS)to observe their Bosker screens in operation,the City requested to change the screen type to either climber screens or multi-rake screens with belt conveyor for screenings conveyance.CDM Smith provided the following additional services for the screen technology evaluation and design. ■ Coordinated with climber screen and multi-rake screen manufacturers to receive cost proposals,equipment details and specifications ■ Evaluated climber screens and multi-rake screens and presented evaluation to City for review ■ Coordinated and attended four webex conference calls with multi-rake screen manufacturers (Duperon,Huber,Headworks,and Vulcan) ID VC South Flow Lift Station Cost Amendment Proposal Final 06O72020,dou �C_ _DM mit� Farida Goderya,PE,PhD August 7, 2020 Page 3 • Coordinated and attended one webex conference call with Upper Trinity Regional Water District Doe Branch Plant Manager for Duperon and Huber screen installations at their Doe Branch WWTP and Riverbend WWTP ■ Prepared preliminary design and 60%design for three multi-rake screens and belt conveyor system including process-3nechanical,electrical &instrumentation and control design. Odor Control Evaluation The original design scope included design of a pre-packaged biotrickling filter system.Since the lift station was relocated to the southwest corner of the plant close to the existing Headworks Binfilter system and understanding the City's desire to minimize multiple types of odor control systems at the plant,CDM Smith performed a cost evaluation to determine the lowest cost option for odor control improvements for the lift station.The two alternatives evaluated were 1]tie into the Headworks Biofilter or 2] provide a pre-packaged biotrickling filter system.The results of the evaluation were included in the PDR and 60%design was based on tie-into the Headworks Biofilter. Gravity and Force Main Design The original design scope included 1,800 linear feet (LF)force main outside the levee from Box C to Box F1.Locating the lift station in the southwest corner of the plant changed the scope for the force main design to the following. ■ Reduce 72-inch force main to approximately 881 LF,including 160 LF of 84-inch steel casing tunnel through the levee. ■ Add force main route study including one route outside the levee and one route inside the levee. ■ Add approximately 878 LF of 90-inch diameter gravity main,including 360 LF of 108-inch steel casing tunnel through the levee. ■ Add 90-inch gravity main route study including one route outside of the levee and one inside the levee. • Add approximately 147 LF of 72-inch diameter gravity main,installed by open cut for emergency diversion, ■ Add tie-ins for the 72-inch and 90-inch gravity mains to the existing system. ■ Site visit walkthrough to discuss proposed alignment options from gravity and force main. Rt VCSouth Flew Lift SWIM rootnroendfabilt PrOPMAI RM108072020.de[[ I CDM Smith liarida Goderya,PE,PhD August 7,2020 Page 4 Geotechnical Investigation Additional geotechnical investigation was required For the tunnel design and for deeper pipe depth for the gravity and force mains due to crossing the existing 96-inch main.This work was completed, and geotechnical report was submitted to CDM Smith May 29,2020, After plotting the proposed boring locations and reviewing previous boring logs,it was noted that deep alluvial soils are present.Alliance Geotechnical needed to deepen the pipeline borings to the top of rock and install piezometers to correlate the ground water elevations with the water level in the creek.The increase in the borings depths also increased the amount of lab testing required for each test boring.Alliance Geotechnical will monitor the piezometers twice as long as well as perform additional testing within the piezometers (Permeability testing)that requires additional equipment not proposed previously.Additional testing was also completed within the test borings on 5 ft intervals and TCP testing for tunneling design. 2.0 Additional Design Scope Additional design scope was added during the preliminary design phase.A summary of these new scope items is presented below.This scope of work under this task includes preliminary design (30%)and final design (60%,90%,and 100%). ■ Influent Diversion Structure ■ Emergency diversion ■ Box G Structural Rehabilitation ■ Miscellaneous gate improvements Influent Diversion Structure The influent diversion structure was not included in the original design scope.The structure is necessary to divert flow from the 90"sewer upstream of Box C to the proposed lift station.Design effort will include the following: ■ Review existing record drawings of the 90"sewer and existing utilities in the area • Civil/site and configuration layout design ■ Provide structural drawings and details.It is assumed the structure will have internal dimensions of approximately 28-ft by 30-11 and an approximate depth of 35-ft. VC Sarah Flow tlfe Skaelon Cost Amondmnm Praparal Flna100072020.doex f CDM Smith Farida Goderya, PE,PhD August 7,2020 Page 5 Emergency Diversion Emergency diversion pipe was not included in the original design scope and was requested to provide the plant the ability to divert flow to the primary clarifiers if the lift station is shut down mainly due to unforeseen power outages.Ideally the emergency diversion will be from the influent diversion structure and tie into the 72 inch pipe from Box C to Box 4B.Design effort will include the following: • Include overflow weir in influent diversion structure. ■ Plan and profile drawings for approximately 200 LF pipe. ■ Add sluice gate at Box F1 [included in 2.4 Miscellaneous Gate Improvements] Box G Structural Rehabilitation An assessment for Box G was completed in 2003 and was identified to have moderate deterioration of all interior concrete surfaces.Scaling and delarnination of the concrete walls is evident throughout with deterioration present up to 1-inch of the wall thickness.There were no areas of exposed reinforcing steel.The sluice gates were severely corroded and one of the gates has since been removed.Structural repairs and protective coatings are needed around sluice gates.Design effort includes the following. ■ conduct site visit to visually observe the existing condition of Box G from the top and compare it to previous condition assessments.A confined space entry will not be performed during the site visit. ■ Provide rehabilitation drawings,details,and specs for concrete rehabilitation on the interior wails of the structure around the sluice gates being replaced. Extend of structural repairs are based on field conditions observed at the time of site visit No exterior repairs or stairs/handrails repairs are included in the scope. Miscellaneous Gate Improvements Sluice gates are needed at various junction structures in the plant to provide ability to manage flow when the lift station is put in service.The following structures need new gates or,gate replacement. All gates will have electric actuators. Box F1-one 78-inch sluice gate is necessary to isolate the force main from the west flow. ■ Box G-two 36-inch sluice gates are necessary to control flow to PCs 1-6.Currently the plant closes the gate at Box 48 and pinch the gate at Box F2 to control flow going through the east 46-inch main"Frank Crumb Line"to PCs 1-6.When the lift station is in service and all flow RA VC South Ftow tlft Station COStAmendment Proposal Final o8077.02a.derx math Farida Goderya,PE,PhD August 7,2020 Page 6 goes through the Headworks Facility the east main will need to be at full capacity to convey peak flow to Primary Clarifiers 13-18. ■ Box 4B-a sluice gate is needed at Box 48 to isolate the proposed emergency diversion pipe i to the main plant flow.Currently there are stop logs for the 72"pipe from Box C, however these stop lofts would have to be installed permanently and the response time to remove the stop logs will be much longer that response time to open a gate, Having a gate will minimize response time and therefore minimize overflow in the collection system if the lift station was down for any circumstance, Quality Control/Quality Assurance The work conducted and deliverables developed as a part of this task will undergo a formal internal technical review in accordance with CDM Smith's Quality Management Procedures. 3.0 Value Engineering Value engineering was completed on the lift station 60%design and three options were presented to the City.CDM Smith completed the following tasks for the value engineering effort. ■ Develop VE Option layouts and conceptual level (15%) opinion of probable construction cost (OPCC) for each option. ■ Conduct VE meeting with CDM Smith,Freese&Nichols,JQ,and City staff. ■ Prepare summary letter presenting VE options and associated OPCC. ■ Perform risk assessment and prepared summary of risks and potential costs for VE Option B- 3. Develop VE Option Layouts and Update OPCC CDM Smith developed three VE options and associated OPCC for the City's consideration to reduce construction cost.VE options included: ■ VE Option A-locate lift station inside the plant levee in the southwest corner of the plant as shown in PDR and 60%drawings. ■ VE Option B-locate lift station outside the plant levee southeast of Box C area. ■ VE Option C-locate lift station outside the plant levee is southwest corner of the property. Risk Assessment for l/rt;Option 8 During the VE effort,CDM Smith identified risks and unknows for VE Option B location including floodplain/floodway impact,tree mitigation,unknown underground utilities in the area,Oncor `a VCSouLh Flow LUF Slatlon Cmlh nolm..LFmpas,IFinal0072020.d— CDM Smith Farida Goderya,PE,PhD August 7,2020 Page 7 overhead electric conflicts,and easements for construction access.CDM Smith conducted a risk assessment for VE Option 8 to quantify these risk to the best of our ability based on available information provided by the City. The City elected to proceed with the VE Option B-3 concept(see attached drawing) with the following changes to the lift station design. ■ Remove roughing screens and associated influent/effluent gates. Deleting the screens will require a different pump selection.Non-clog impellers including semi-open impeller (such as Flygt Type N pumps) or open impeller pumps are recommended if roughing screens are removed to prevent potential ragging of woven material in raw wastewater.Due to size limitations of non-clog impellers,the number of pumps may increase.Increasing number of pumps will increase lift station footprint. ■ Reduce lift station max capacity from 150 million gallons per day(mgd)to 120 mgd. ■ Remove wet well redundancy and provide one self-cleaning trench type wet well with 5 pumps.Provide 4 pumps now with slot for 5d,pump in future. ■ Address utility conflicts identified under the risk assessment task. • Relocate various underground utilities,including gas,telephone cable,sewer and water lines. • Demolish abandoned Arlington meter and sewer manhole structures. • Relocate 6-inch potable water lines,flow meter station and hack flow preventer. • Relocate 4.2-inch storm drain. 0 Relocate Oncor overhead electric lines-coordinate with Oncor regarding lift station location and restrictions to construction activities in their easement and under the power line.The Oncor overhead electric lines are the plant's power source for the Village Creek substation.It is unclear at this point how much it will cost and what impacts this has to plant's power if relocated.If relocation is required,it will be relocated underground.See 4.0 Preliminary Design for additional information. • Odor control concept changes-previous odor control evaluation and 60% design included extending the odor control ductwork to the existing Headworks Biofilter due to proximity of lift station to Headworks Biofilter.Now that the lift station is located at VE Option B-3 site, the evaluation needs to be updated to reflect longer ductwork to Headworks Biofilter or stand-alone biotrickling filter system with one vessel and 2 fans (one operating,one standby). ka VGSaulh Flow Lift Station Cast Amendment Proposal f Ina D8 07202DA-A CPM Smith Farida Goderya,PE,PhD August 7,2020 Page 8 ■ Electrical design concept changes—with the location of the lift station at VE Option B-3 and deleting screens and number of pumps/VFDs the electrical design concept will likely change. CDM Smith will revise electrical design and look at options for power to the lift station(i.e. power from new grit facility switchgears (current design) or switchgear in digester area). ■ Instrumentation&controls design concept changes--with the location of the lift station at VE Option B-3 the instrumentation&controls design concept will likely change.CDM Smith will look at options for integrating the lift station monitoring and controls to the SCADA system (i.e.go to West HUB at existing Headworks Facility or another route to admin building). ■ Force main and gravity sewer redesign. • Increase 72-inch force main length to 2,100 LF. • Reduce 90-inch gravity main to 212 LF. • Reduce 72-inch gravity main emergency diversion to 135 LF. • Remove tunnel designs,the force main and gravity mains will be installed open cut. • Revise tie-in locations for the 72-inch and 90-inch gravity main and 72-inch force main. ■ Demolish Bar Screen Building No.3 super structure,remove screening equipment and associated electrical and instrumentation and controls,and cover slab openings. No structural modifications or structural rehabilitation of the screen channels is included. Assumptions; ■ Minor modifications to levee embankment are included as part of the original scope of work in Amendment No.1. ■ Modifications to retaining wall around Box C area is not included. 4.0 Preliminary Design (3O%) Preliminary design efforts for VE Option B-3 include the following to incorporate the changes identified above. Update Preliminary Design and Preliminary Design Report The preliminary design and preliminary design report will be updated to document the VE Option B-3 design changes and will include the following efforts. ■ Revise structural narrative in PDR for updated lift station wet well layoutjlocation. vc south Flew Lift station cast n.oaadmoat propose I Furl oe0721)20,da[K CDM- Smith Farida Goderya, PE,PhD August 7,2020 Page 9 ■ Remove structural narrative regarding the junction boxes at Bar Screen No.3 and screening channels. ■ Revise the preliminary structural analysis for the lift station wet well walls,foundation slab, and upper slab. ■ Revise system curve and pump selection for new lift station location and force main alignment. ■ Revise pump station narrative to include new system and pump curves and pump selection. ■ Revise wet well configuration to self-cleaning trench type. ■ Revise gravity and force main calculations,alignments and report narrative. ■ Revise odor control evaluation and recommendation. ■ Revise electrical design concept and report narrative. ■ Revise instrumentation&.controls concept and report narrative. ■ Revise Bar Screen Building No.3 rehabilitation report narrative. Assumptions: ■ Geomorphological studies and/or bank restoration along the force main alignment are an additional service. Deliverables: ■ Updated Preliminary Design Report. Update Hydraulic Modeling Lift station hydraulic design will require complete update based on the new lift station location. Freese&Nichols will update the hydraulic model to reflect revised preliminary design and apply hydraulic model to collection system model to assess the hydraulic impact of the proposed design to the collection system upstream of the plant.The model will be updated from the proposed lift station to manhole 97206 (adjacent to Lake Arlington Dam). Deliverobles, 01 Updated hydraulic profiles VC Samh k—tf t 5tat1on Cost Amendment Proposal Final 08072620.dom I CDM Smith Farida Goderya,PE,PhD August 7,2020 Page 10 Surveying Additional topographic surveying will be completed to extend survey limits to Wilma lane and south of the box culvert drainage channel.Trees within the survey limits will be identified including type and size.Easement research will be conducted to identify utility easements in the area. Deliverables: ■ Updated topographic survey with tree identification and existing Oncor utility easement(if one exists) Geotechnical Investigation Additional geotechnical investigation will be required for VE Option B lift station location and will include drilling 2 additional test borings,laboratory testing,engineering analysis,and updating the Geotechnical Report.One piezometer(monitoring well)will be installed within the test boring. Delayed water level readings within the piezometers and water level readings within the adjacent creek will be obtained to correlate the ground water level within the piezometer with the water level within the adjacent creek.Eight trips to obtain delayed water level readings and the water level within the adjacent creek are anticipated,Pricing for pulling and plugging the piezometer is not included within this proposal.. Deliverables. ■ Updated geotechnical investigation report Tree Removal Permit and Tree Mitigation "there are several trees in the area of the revised lift station location,some appear to be oak trees, cotton wood trees,and hackberry trees.CDM Smith will coordinate with COFW forester and submit a tree removal permit application to remove trees as necessary for construction of the project and coordinate with the COFW regarding tree mitigation options.Tree rep]anti ngfmitigation design is not included within this proposal. Deliverables: ■ Tree Permit Application Floodplain Permitting and CDC Modeling VE Option B-3 lift station location is located within the West Fork Trinity River,Village Creek and VC(A)-1 regulatory(100-year) floodplains and encroaches upon the regulatory floodway.This location includes hydraulic influence from the West Fork of the Trinity River(WFTR),Village Creek and VC(A)-1,a tributary to Village Creek.Floodplain and floodway mapping have been performed oai all three drainageways.However,the floodplain at this location is controlled by backwater from the WFTR. vc south Flew Lift stetlan Cast amendment Ptopasal Fina 109077L12a_d" i CDM- Smith Farida Goderya, PE, PhD August 7,2020 Page 11 Per the City of Fort Worth(City) Ordinance 11988: (Floodway) Encroachments are prohibited including fill,new construction,substantial improvements and other development unless an approved technical evaluation by a registered Professional Engineer is provided demonstrating that the cumulative effect of the proposed encroachments when combined with all other existing and anticipated development and encroachment shall not result in any increase in flood levels within the community during the occurrence of the base flood discharge. Ordinance 11988 defines the floodway as: ...the channel of a river or other water course and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the watersurface elevation more than a designated height.The designated height increase is not specified in the City ordinance;nor could it be found in a search of other City documents. FEMA specifies a maximum height increase of one-foot,but many jurisdictions limit the increase to six-inches.Development in the floodway can occur under the following conditions: ■ The proposed development does not cause an increase in base Hood elevations (BFEs); ■ If an increase in BCiEs is unavoidable,then a Conditional Letter of Map Revision(CLOMR), based on the proposed design,must be obtained prior to the start of construction and a Letter of Map Revision (LOMR),based on as-constructed conditions,must be obtained. Floodway impacts are analyzed using hydraulic modeling that provides water surface elevations and floodplain and floodway widths based on the regulatory flow,which has an annual exceedance probability of one percent(an average reoccurrence of once every 100 years),usually referred to as the 100-year flood. A response to a CDM Smith inquiry regarding analytical requirements from the City,Transportation Department,Stormwater Division provides the following guidance: ■ Hydraulic modeling will not need to be performed for WFTR or Village Creels. ■ Valley Storage calculations will need to be provided based on the WFTR floodplain to meet North Central Texas Council of Governments [NCTCOG) Corridor Development Certificate (CDC)requirements.Surplus valley storage,approximately 1,26 ac-ft,could be used from the VCWRF Peak Flow Management Project to mitigate for a loss of valley storage from this project. ■ Proposed site impacts (floodplain depths and velocities)should he analyzed hydraulically using the VC(A)-1 model.The VC(A)-1 model may need to be extended downstream a few hundred feet to capture the project site.Normal depth should be used as the downstream boundary condition.The VC(A)-1 model will be obtained from the City of Arlington. i R> � vc south Ffow Lift stsenn cast Amendment Proposal Fhal oso7242P.OQu i CDM_ math Farida Goderya,PE,PhD August 7,2020 Page 12 ■ The flood study should be based on 60% design grading plan and valley storage calculations. ■ The flood study will be submitted to Stormwater Development Services (SDS) (SDS@fortworthtexas gov) through BIM360.SDS will assign a flood study number,coordinate the BIM360 submittal and provide internal City review of the project the submittal. ■ The City will require a Floodplain Development permit(FDP)through the City's A.ccela portal where it will be assigned a permit number and sent to the floodplain management group for review and approval. Regarding permitting requirements,there are three approaches that can be used when developing in the floodplain: 1. An FDP is required for proposed development that is located in the floodplain but not in the floodway. Z. A No Rise Certification is required for proposed development that is located in the floodway but does not have an impact on BFEs or floodplain widths. 3. A CLOMR/LOMR is required for proposed development that is located in the floodway and has an impact on BFE's and/or floodway widths. �I This scope makes no assumption as to what type of permit will be required.Although the City has it indicated that an FDP will be required.The City has also indicated that the proposed lift station site may not encroach upon the VC(A)-1.CDM Smith is assuming that an FDP will be the appropriate permit mechanism if the development does not encroach upon the floodway.If it does encroach upon floodway,then a no rise certification or CLOMR/LOMR process may be required and is not included in this proposal. ■ This scope is intended to provide an analytical basis for assessing floodplain/floodway impacts and regulatory requirements.The approach is based on the FEMA National Flood Insurance Program (NFIP)guidance for floodplain modeling.This approach includes the following steps: ■ Obtain the regulatory floodplain model from either the local jurisdiction or FEMA engineering library.This model is known as the effective model. i ■ Duplicate BFE's using the effective model.This model is known as the duplicate effective model. ■ Update the duplicate effective model to current conditions that incorporate topographic or structural changes to the floodplain that are not included in the effective model.For instance, ID VC South Flow Lift Station Cast Arnondmont Proposal Final 00072420.docx i CDM Smith Farida Goderya,PE,PhD August 7,2020 Page 13 it appears that the Prestonwood Lake dam,upstream of Green bales Boulevard,has been breached or has failed.If this dam is included in the effective model,it should he removed. This model is known as the current conditions model. ■ Add the proposed development to the current conditions model and assess impacts to BFEs. This model is ]mown as the proposed conditions model. The City has requested that the proposed conditions model be used to assess adverse impacts to neighboring properties.Therefore, it will be necessary to obtain a parcel database for the project vicinity with enough extent to identify all affected properties.Usually,this database can be obtained from the County Assessors office in GIS format.This analysis will be accomplished by overlaying a proposed conditions floodplain/noodway GIS shapefile on the parcel map.With regards to valley storage impacts,it will be necessary to conduct a valley storage analysis that complies with the CDC process that includes Parts 1 and 2 applications.The Part 1 application process includes; ■ Pre-Application Conference and Determination ■ Obtain the CDC Model from the USAGE Fort Worth District Hydrology and Hydraulics Branch (USACE. ■ Submit the CDC Application and obtain a Tracking Code. It is possible at this point that an exemption can be obtained. It may be that the 1.26 ac-ft surplus valley storage from the VCWRF Peak Flow Management Facilities Project will mitigate the proposed lift station valley storage impact and can be used to obtain an exemption from the CDC process. However,this has not yet been determined. Following is a detailed scope for the hydraulic analysis of floodplain impacts that may occur from the development of the proposed lift station and for assessing the need for valley storage. Agency Coordination This taste includes coordination that will need to occur with stakeholder agencies such as the City of Arlington,USACE or the NCTCQG in the performance of this project. Assumptions: ■ Two agency coordination meetings have been budgeted.Additional meetings will he considered out of scope and budgeted on a time and materials basis. * Telephone conversations and emails are not considered coordination meetings. VC South Flow Lift Station MtAmendrnant Peoposai Finai CEO 72020.docx I Smith Farida Goderya, PE, PhD August 7,2020 Page 14 ■ Coordination meetings maybe in person or via teleconference depending on Covid-19 pandemic conditions at the time of the meetings.All or any participating parties may request a teleconference meeting.Teleconferencing will include the ability to share desktops and view documents. ■ The City will be included in all email correspondence. Deliverables, ■ A meeting summary will be issued to the City for each agency contact that summarizes discussion points,decisions made and action items. VC(A)-1 Ilydraulie Model and DataAcauisition and Analysis This task consists of obtaining the VC(A)-1 effective model and performing the modeling sequence that includes the development of the duplicate effective model,current conditions model and proposed conditions model.In addition,this task also includes obtaining a parcel dataset and georeferenced topographic and aerial image base mapping.The task will include an analysis of site encroachment on the VC(A)-7 floodway and possible impacts to neighboring(i.e.,adjacent and non- adjacent)parcels. Assumptions: ■ The VC(A)-1 model and f]oodplain may be undergoing revisions at this time. If so,the City and City of Arlington will determine whether CDM Smith utilizes the current effective model and floodplain/floodway mapping or the preliminary revised model as the basis For hydraulic analyses undertaken as a part of this task.If CDM Smith is required to use the preliminary revised model and it is not available at the time of request,this delay could potentially impact design schedule and budget.Cost associated with impacts to project schedule and budget are not included in this proposal. ■ GIS-based parcel data is available from the Tarrant County Assessor's office and will be made available at no cost to CDM Smith.The City will bear any costs associated with the acquisition of this data. ■ Geo-referenced topographic(either LiDAR or DEM) and aerial photography of the project is available from'Tarrant County,the City and/or City of Arlington in a form that can be incorporate into an ArcGIS-base project and used to develop a project base map at no cost to CDM Smith.If there is a cost associated with the acquisition of these datasets,it will be borne by the City. 10 Vc south Flow Lift Stevan cast Amendment Proposal Final 0607202oA—X CDM Smith Farida Goderya,PE,PhD August 7,2020 Page 15 ■ The models to be developed under this task will be based on the current version of the one- dimensional,steady flow HEC-RAS software utilizing RASMapper and HEC-GeoRAS as necessary. Deliverables: Deliverables will include the following: ■ Hydraulic models acquired or developed by CDM Smith. ■ Mapping that depicts floodplain and floodway conditions based on the proposed lift station design. ■ Mapping that depicts current and proposed floodplain and floodway encroachments on neighboring parcels. ■ All deliverables will be in either HEC-RAS or G1S format. NCTCQG CDC Valley StoraVe,An � This task consists of determining if the 1.26 ac-fit surplus valley storage can be used to mitigate proposed lift station valley storage impacts and performing the CDC Part 1 application process.If this analysis determines that the 1.26 ac-ft is sufficient and can be utilized to provide mitigation, then the CDC application process will end with a request for a valley storage exemption.If not,the task will continue to completion of the Part 1 application process.This task includes contacting the USACE and obtaining the CDC model,running the model to estimate the proposed valley storage impact and submitting the necessary documentation to be assigned a CDC tracking code. It may be that a determination of applicability can be made during the pre-application conference and the work identified in this task may not be necessary.However,an analysis of the applicability of the surplus storage to mitigate for proposed storage impacts probably will have to be performed and documented. if this is the case,CDM Smith will work with the City to revise the task budget accordingly prior to completing the work. Assumptions: ■ CDM Smith assumes that the 1.26 ac-ft of surplus storage will be adequate to mitigate the proposed lift station storage impact and a CDC exemption will be allowed making it unnecessary to proceed with the fart 2 application process.Should this not be the case,CDM Smith will work with the City to develop a contractamendment for development,processing and approval of the Part 2 application. w 160 VC South Flow Lift Statbil Cost Aria mdmanI Rruposa If!nol OB077070.du i C M_ math Farida Goderya,PE,PhD August 7,2420 Page 15 0 The City will provide sufficient information for CUM Smith to make a determination of the adequacy of the surplus storage to meet the proposed storage impacts. ■ The City will coordinate with NCTCOG regarding use of valley storage surplus to mitigate proposed lift station valley storage impacts and request for exemption,if applicable. ■ The City will obtain a CDC tracking code from NCTCOG. ■ C.DM Smith will obtain CDC model from either the USACE or NCTCOG. Deliverables: ■ Pre-application meeting summary. ■ CDC proposed conditions model. ■ CDC Part 1 application including a request for exemption,if applicable Floodplain &Valley Storage Im.pacts_Repart Upon completion of the floodplain and valley storage analyses CDM Smith will develop an impacts report that summarizes the results analysis.This report will first be developed in a preliminary draft format that will undergo a formal internal technical review in accordance with CDM Smith Quality Management Procedures and upon incorporation of technical review comments will be provided to the City for further review.City comments will be incorporated into the report and a draft final version will be provided to the City of Arlington for review,assuming there may be impacts to parcels under Arlington's jurisdiction.City of Arlington review comments will be discussed with the City and either a response will be prepared by CDM Smith and/or comments will be incorporated into the Final version of the report. Assumptions: ■ No other agencies or other stakeholders will need to review the impacts report,If further review is required,any effort on our part will be time and materials in agreement with the City. F If no City of Arlington impacts are predicted,then a review by its staff will not be requested. Deliverables: ■ Preliminary draft and final versions of the report to the City for review in PDF format. Oncor Village Creek Feeder Relocation CDM Smith will coordinate with Oncor representative regarding clearances for the overhead conductors as it relates to permanent structures and construction activities within their easement ki VC South Tim tih Station Gas!Amendmont Prapoul Final 007797{Y. -9 C M r ith Farida Goderya,PE,PhD August 7,2020 Page 17 and/or right of way. If the Oncor overhead conductor requires relocation,CDM Smith will coordinate the utility relocation with Oncor and incorporate design of underground conduit for Oncor to relocate conductors underground. i Assumptions: ■ One site visit with Oncor and City staff to investigate Oncor relocation options. * Up to two coordination meetings with Oncor have been budgeted,Additional meetings will be considered out of scope and budgeted on a time and materials basis. Telephone conversations and emails are not considered coordination meetings. ! Coordination meetings maybe in person or via teleconference depending on Covid-19 pandemic conditions at the time of the meetings.All or any participating parties may request a teleconference meeting.Teleconferencing will include the ability to share desktops and view documents. ■ The City will be included in all email correspondence. ■ Preparation of easement documents required by Oncor are not included in this this scope of work. Deliverables: ■ Site visit and coordination meeting summaries. Quality ControlfQuality Assurance The work conducted and deliverables developed as a part of this task will undergo a formal internal technical review in accordance with CDM Smith's Quality Management Procedures. PHASE II — FINAL DESIGN 5. Final Design (60%) Additional final design effort includes the following. ■ Update the 60%design for VC Option B-3 including site/civil,structural,process-mechanical, odor control,electrical,instrumentation,and force main design drawings. ■ Update the 60%design level OPCC. ■ QA/QC-the work conducted,and deliverables developed as a part of this task will undergo a formal internal technical review in accordance with CDM Smith's Quality Management Procedures. VC South Flow LIR Station Cost Amendment Proposal FIn&J C8072C70.deca i CDM. Smith Farida Goderya,PE,PhD August 7,2020 Page 18 ■ Final design effort for the additional scope items is included in 2.0 Additional Design Scope. G. Meetings The following meetings have been added to the project scope. ■ Bi-weekly coordination meeting with City—original scope had monthly coordination meetings with the City.CbM Smith will continue to attend bi-weekly coordination meetings with the City. 7. Bid Phase Services The following services will be provided during bid phase. ■ Respond to questions and interpretation of bid documents related to new scope items identified in 2.0 Additional Design Scope. ■ Conform contract documents prepared for new scope items identified in 2.0 Additional Design Scope. COMPENSATION The total requested amount of this proposed amendment is$699,217. Please let me know if you have any questions and when you would like to discuss at your earliest convenience. Sincerely, Amy Robinson,PE,BCEE CDM Smith Inc. cc: Doug Varner,CDM Smith Stacy 13arna,CDM Smith i? 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L c o� o\°\° m Q z U 9 £ o o � W L m `4� J ~ V O LL f0 N w O. p o o 0 N o 0 0 N O O O a Y a .L m F �n (D a m IL a > > > io �o u H u m m u F u .-+ .� u -o m 0 o r z Se a iY m d' N U iT iT 1c 1c 1c AK i' Al Al i� tic i� i' i' i' �c 1c 1c 1c 1c 1c 1c i� iT iT iT i? iT i' i' iT iT i' i' i' 3 N 7 i2 t2 O aW p a � V N O V O N O1 O � O � 0 v m 0 F GO O — — r O V O- N O � n' R E E r � E E E o � ` 00 O N rl ID 00 N + LL N e-I N \ M M M D \ \ \ \ co V1 s v M c v iz c H 3 E O N E °—�' E nIr_ V E M N O O N a - in N O co N V O N Lo l0 O/ U O a` m ° E U - E 15 F va u Z (a C O O O U O J E v ? 0 LZ m c c c u° u° F U d' N r e r ao m v v 0 Q m m m a City of Fort Worth, Texas Mayor and Council Communication DACE: Tuesday, September 22, 2020 REFERENCE NO.: "M&C 20-0700 LOG NAME: 60VCWRF GRIT AND LIFT STATIONA5-CDM SU13JECT: (CD 5) Authorize Execution of Amendment No. 5 in the Amount of$599,217.00 to an Engineering Agreement with CDM Smith, Inc. for the Process Evaluation and Engineering Design of the Village Creek Water Reclamation Facility Grit Facility & South Influent Pump Station project for a Total Revised Contract Amount of$4,047,869.00,Adopt Resolution Expressing Official Intent to Reimburse Expenditures with Proceeds of Future Debt and Adopt Appropriation Ordinance RECOMMENDATION: It is recommended that the City Council: 1. Authorize execution of Amendment No. 5 in the amount not to exceed $699,217.00, to City Secretary Contract No. 49049, an Engineering Agreement with CDM Smith, Inc., for process evaluation and engineering design of the Village Creek Water Reclamation Facility Grit Facility& South Influent Pump Station project for a revised contract amount of$4,047,869.00 (City Project No. 100075); 2. Adopt the attached Resolution expressing official intent to reimburse expenditures with proceeds of future debt for the Village Creek Water Reclamation Facility Grit Facility and South Influent Pump Station, and 3. Adopt the attached Appropriation Ordinance adjusting appropriations in the Water and Sewer Commercial Paper Fund by increasing appropriations in the Village Creek Water Reclamation Facility Grit Facility and South Influent Pump Station project (City Project No. 100075) in the amount of$759,217.00 and decreasing appropriations in the Unspecified project(City Project No, UNSPEC) by the same amount. DISCUSSION: On May 2, 2017, by Mayor and Council Communication (M&C) C-28213, the City Council authorized an engineering agreement with CDM Smith, Inc. (City Secretary Contract No. 49049), in the amount of $1,570,965.00 to evaluate and design the grit removal process at the Village Creek Water Reclamation Facility Grit Facility (VCWRF). The agreement was subsequently revised by Amendment No. 1, authorized September 18, 2018 (M&C 0-28857), in the amount of$885,755.00 for the design of the South Influent Pump Station (PS), associated sewer, force main and ancillary improvement. Amendment No. 2 was administratively authorized February 7, 2019 in the amount of$71,993.00 for physical modeling to investigate the grit facility influent splitter box configuration and the tie-in to the Headworks facility, Amendment No. 3 was authorized April 7, 2020 (M&C 20-0159) in the amount of$114,939.00 for physical modeling for the South Flow Pump Station, additional odor control design and Grit Influent Splitter Box water jet system modifications. Amendment No. 4 was authorized May 19, 2020 (M&C 20-0346) in the amount of$705,000.00 for construction support services for construction of the new grit facility at VCWRF, This Amendment No. 5 includes additional services for the proposed South Influent Pump Station. The additional services to be provided include screen evaluation and design, odor control evaluation, emergency diversion design, structural rehabilitation design, gate improvements, flood plain permit and geotechnical investigation. CDM Smith, Inc., proposes to perform the additional services for a fee not to exceed $699,217.00. In addition to the amendment amount, $60,000.00 is required for project management. Funding for the Village Creek Water Reclamation Facility Grit Facility & Sauth Irtifluent Pump Station Project is depicted below; Existing Additions! Fund Existing Appropriations Project Total* Water & Sewer Bond 2017A - $1,870,965.00 $0.00 $1,870,965.00 Fund 56011 WS Capital Project 2019 - $1,035,755.00 $0.00 $1,035,755.00 Fund 56016 Water & Sewer Bond 2020A - $27,552,151.00 $0.00 27,552,151.00 Fund 56017 W&S Commercial Paper - Fund $0.00 $759,217,00 $759,217.00 56019 Project Total $30,458,871.00 $759,217,00 $31,218,088.00 Numbers rounded for presentation purposes. This project will have no impact on the Water Department's annual operating budget when completed. This project is anticipated to be included in a future revenue bond issue for the Water &Sewer Fund. Available cash within the Water and Sewer portfolio and the City's portfolio along with the appropriation authority authorized under the Callable Commercial Paper Program (CP)will be used to provide interim financing for this project until debt is issuad, To the extent resources other than the Water and Sewer portfolio are used to provide interim financing, the Water& Sewer Fund will be charged interest that is equivalent to the overall rate of return being earned by the City portfolio (currently approximately 2.3 percent annually). Should the City's portfolio not support the liquidity needed to provide an interim short- term financing source, another funding source will be required, which could mean issuance of securities under the CP Program or earlier issuance of Water and Sewer revenue bonds than is currently planned. Once debt associated with this project is sold, bond proceeds will be used to reimburse the Water and Sewer portfolio and the City's portfolio in accordance with the attached reimbursement resolution. The City Council approved the Water Department's Fiscal Year 2020-2024 Five-Year Capital Improvement Plan on September 17, 2019. This City Council approved plan includes this specific project,with funding identified through the CP program to be reimbursed with future revenue bonds. In accordance with the provisions of the Financial Management Policy Statements, staff anticipates presenting revenue- supported debt issued within approximately three years to provide reimbursement for these expenses. If that does not occur, the costs will no longer be reimbursable by issuing tax-exempt debt and the funding source will have to be made whole through other budgetary methods. Adoption of this resolution does not obligate the City to sell bonds, but preserves the ability to reimburse the City from tax-exempt bond proceeds. MIWBE OFFICE -COM Smith, Inc., is in compliance with the City's BDE Ordinance by committing to 11 percent SBE participation on the Amendment No. 5. The City's goal on this Amendment No. 5 is six percent. This project serves the entire City and is located in COUNCIL DISTRICT 5. FISCAL INFORMATION I CERTIFICATION: The Director of Finance certifies that upon approval of the above recommendations and adoption of the attached appropriation ordinance, funds will be available in the W&S Commercial Paper Fund for the VCWRF Grit Fac&S Influent PS project to support the execution of the amendment to the engineering contract. Prior to an expenditure being incurred, the Water Department has the responsibility of verifying the availability of funds. FUND IDENTIFIERS (FIDs): TO Fund Department ccoun Project Program ctiyity Budget I Reference # �mounl ID ID Year (Chartfield 2) FROM T partment I ccoun Project Program ctivity Budget Reference # moun -- ID ID Year (Chartfield 2) CERTIFICATIONS: Submitted for City Manager's Office by: Dana Burghdoff (8018) Originating Department Head: Chris Harder (5020) Additional Information Contact: Farida Goderya (8214) ATTACHMENTS 1. 60VCWRF GRIT AND LIFT STATIONA5-CDM Compliance Memo.pdf (CFW Internal) 2. 60VCWRF GRIT AND LIFT STATIONA5-CDM FID Table (NN 08.26.20).xlsx (CFW Internal) 3, 60VCWRF GRIT AND LIFT STATIONA5-CDM Farm 1295.pdf (CF'W Internal) 4, 60VCWRF GRIT AND LIFT STATIONA5-CDM funds avail.docx (CFW Internal) 5. 60VCWRF GRIT AND LIFT STATIONA5-CDM Reimb Resolution (NN 08.26.20).docx (Public) 6. 60VCWRF GRIT AND LIFT STATIONA5-CDM SAM.pdf (CFW Internal) 7. 60VCWRF GRIT AND LIFT STATIONA6-CDM_66019 A020(R3).docx (Public) 8. 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