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HomeMy WebLinkAbout2011-02-22; City Council; 20459; AMENDMENT 3 BROWN AND CALDWELL INTERCEPTOR SEWERCITY OF CARLSBAD - AGENDA BILL 20,459AB# MTG- 2/22/11 DEPT. UTIL APPROVAL OF AMENDMENT NO. 3 WITH BROWN AND CALDWELL FOR THE DESIGN OF THE VISTA/CARLSBAD INTERCEPTOR SEWER, REACHES 11 B - 1 5, AND THE AGUA HEDIONDA SEWER LIFT STATION PROJECT NOS. 3492, 3886, AND 3949 DEPT. DIRECTOR CITY ATTORNEY CITY MANAGER RECOMMENDED ACTION: Adopt Resolution No. 2011-030 approving Amendment No. 3 to the professional services agreement with Brown and Caldwell for the design of the Vista/Carlsbad Interceptor Sewer, Reaches 11B - 15, and the Agua Hedionda Sewer Lift Station, Project Nos. 3492, 3886, and 3949. ITEM EXPLANATION: Project Background: The Vista/Carlsbad (V/C) Interceptor Sewer was constructed in 1965 and is jointly- owned by the City of Vista and the City of Carlsbad. The alignment, approximately eight miles in length within the City of Carlsbad, extends from just west of College Boulevard and Highway 78 to the Encina Water Pollution Control Facility (Encina). There are two sewer lift stations within the alignment, the Buena Vista Lift Station, and the Agua Hedionda Lift Station (see Exhibit 1). Both are maintained and operated by the Encina Wastewater Authority through a joint agreement. The upper reaches of the Vista/Carlsbad Sewer System from VC1 through VC11A have been replaced or rehabilitated in recent years, with the exception of the Buena Vista Force Main (VC4), which will be bid in the spring of 2011. Reaches VC11B to VC15, which include the Agua Hedionda Lift Station and the adjacent trestle bridge supporting the sewer across the Agua Hedionda Lagoon, are in a state of declining condition and need to be replaced. Additionally, these facilities do not have the capacity to convey the ultimate flows projected for the basin. The Agua Hedionda Lift Station is the City's largest sewer lift station and is located adjacent to the lagoon on property owned by NRG Energy. The remaining portion of the gravity sewer to Encina, approximately two miles in length, does not have adequate capacity to meet future flows that are anticipated. Furthermore, this reach of interceptor sewer has been identified for replacement in Carlsbad's Sewer Master Plan to address the capacity deficit. In 2008, the City selected the engineering firm of Brown and Caldwell to perform the final engineering design of the project. In addition to the engineering services, Brown and Caldwell was asked to provide a full service consultant team that could provide survey support, geotechnical investigation, environmental compliance documents and acquisition of resource agency permits. Project Description: The project includes the replacement of the existing wood trestle bridge with a new 140-foot long steel truss bridge, construction of a new sewer lift station approximately 50-feet east of the current facility, and construction of a new parallel force main and gravity sewer to provide increased capacity and reliability to the sewer system. The new gravity sewer will be constructed in Avenida Encinas and a portion of the new sewer will require installation by microtunneling. The new force main will require construction by Horizontal Directional Drilling to avoid utilities within the area. The existing gravity sewer downstream of the lift station was inspected in 2009 and will continue to be utilized to convey a portion of the daily sewage flows from the new lift station and to maintain existing sewer connections south of Cannon Road. The new sewer bridge is being designed to accommodate the occasional maintenance vehicle and will be suitable for use by the Coastal Rail Trail as that project moves forward in the future. DEPARTMENT CONTACT: Terry Smith, (760) 602-2765, terry.smith@carlsbadca.gov FOR CITY CLERKS USE ONLY COUNCIL ACTION: APPROVED „ DENIED CONTINUED WITHDRAWN AMENDED D D D D CONTINUED TO DATE SPECIFIC CONTINUED TO DATE UNKNOWN RETURNED TO STAFF OTHER -SEE MINUTES D D D D Page 2 The project is scheduled for the February 2, 2011 Planning Commission meeting for the Commission's recommendation of approval for the MND and discretionary permits. The project will then be scheduled for a Housing and Redevelopment Commission and City Council meeting for approval of the project's discretionary permits and the adoption of the MND. The project design is approximately 90% complete and it is anticipated that the project will go out for bids in the fall of 2011 once the design is complete and the project receives all discretionary permits. Amendment No. 3 to the Brown and Caldwell agreement addresses additional engineering, environmental and permit services necessary to complete the final design phase of the project. Additional services provided by the Brown & Caldwell team that were not anticipated include the preparation of additional engineering studies for the lagoon bridge, additional easement plats, the trenchless design and geotechnical investigation for the sewer force main, preparing renderings and visual simulations, and obtaining additional environmental permits. Also, changes to storm water quality permit requirements necessitated changes to the grading and on-site drainage. Additionally, the coordination effort with other adjacent projects has been much more time intensive than could have been anticipated. These projects include the proposed Carlsbad Energy Center project, the proposed Desalination Facility, the Amtrak Double-Track Project, and the proposed I-5 Widening. The project has also required significantly more meetings with SDGE to coordinate the relocation of a 12-inch gas main, obtain sewer easements and to provide a second electrical circuit to the sewer lift station. ENVIRONMENTAL IMPACT: The proposed approval of a contract amendment does not qualify as a "project" under the California Environmental Quality Act (CEQA) per State CEQA Guidelines Section 15378, as it does not result in a direct or reasonable foreseeable indirect physical change in the environment. A Mitigated Negative Declaration (MND) and Mitigation Monitoring and Reporting Program (MMRP) were prepared for the Agua Hedionda Sewer Lift Station, Force Main and Gravity Sewer Replacement project (POP 00-02(C)/SP 144(L)/RP 10-26/CDP 10-17/HDP 10-05/SUP 10-02/HMP 10-03). The Planning Director issued a Notice of Intent to adopt a MND for the project on August 13, 2010 and sent it to the newspapers, County of San Diego, and the State Clearinghouse for a 30-day public review (August 17, 2010 - September 16, 2010). One comment letter was received during the 30-day public review; however, the comment letter did not necessitate any changes to the project. Review of the CEQA document by the Planning Commission and City Council is pending and will be reviewed in compliance with the California Environmental Quality Act (CEQA) Guidelines, Section 15074. FISCAL IMPACT: PROJECT COST SUMMARY FOR THE AQUA HEDIONDA SEWER LIFT STATION AND V/C INTERCEPTOR SEWER REPLACEMENT PROJECT, REACHES VC11B - VC15 (PROJECT NOS. 3492, 3886, AND 3949) Manhole Rehabilitation Contract (Completed - Actual Costs) Studies, Environmental Compliance and Design Activities (As of 12/31/2010) Proposed Amendment No. 3 to Brown and Caldwell Agreement City Project Management and Miscellaneous Costs (Estimated) Subtotal of Costs (Through Design) Estimated Construction Phase Costs TOTAL ESTIMATED PROJECT COST TOTAL APPROPRIATIONS TO DATE ADDITIONAL APPROPRIATION REQUIRED $344,900 $3,325,800 $491 ,067 $80,000 $4,241,767 $35,600,000 $39,841,767 $39,930,000 $0 PageS Sufficient funds are currently available for the completion of the project; however, certain costs related to easement acquisition and the relocation of SDGE utilities remains undefined at this time. All project related costs will be shared between the City of Carlsbad and the City of Vista as described within an existing agreement between the two cities for ownership, operation, and maintenance of the sewer system. A project specific agreement is being prepared to define procedures and the payment schedule prior to the project being advertised for bids. The cost share between the two cities is approximately 65% Vista and 35% Carlsbad; however, the actual cost share varies with each reach of the sewer. Carlsbad's share of the project is funded from the Sewer Connection Fee Fund. The City of Vista will be issuing bonds to pay for their portion of the project. EXHIBITS: 1. Location Map. 2. Resolution No. 2011-030 approving Amendment No. 3 to the professional services agreement with Brown and Caldwell for the design of the Vista Carlsbad Interceptor Sewer, Reaches 11B-15, and the Agua Hedionda Sewer Lift Station, Project Nos. 3492, 3886, and 3949. 3. Amendment No. 3 to Agreement for Professional Engineering Services with Brown and Caldwell for the Design of the Vista Carlsbad Interceptor Sewer, Reaches 11B -15, and the Agua Hedionda Sewer Lift Station. LOCATION MAP BUENA VISTA LIFT STATION EXISTING LAGOON BRIDGE VC11B EXISTING AGUA HEDIONDA LIFT STATION LEGEND: — VC11B-VC15 VC1-VC11A VISTA METER STATION ENCINA WATER POLLUTION CONTROL FACILITY PROJECT NAME AGUA HEDIONDA LIFT STATION & VISTA/CARLSBAD INTECEPTOR SEWER REACHES VC11B THROUGH VC15 PROJECT NUMBER CP3492, 3886 & 3949 EXHIBIT 1 DRAWN BY: SCOTT EVANS: CARLSBAD UTILITIES DEPT. 1/13/11 C:\UTiUTlES DEPARTUENT\DESGN DMSfON\SM/7H\VC SEWER LOCATION UAP.DWG 1 RESOLUTION NO. 2011-030 2 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF 3 CARLSBAD, CALIFORNIA, APPROVING AMENDMENT NO. 3 TO THE PROFESSIONAL SERVICES AGREEMENT WITH BROWN 4 AND CALDWELL FOR THE DESIGN OF THE VISTA CARLSBAD INTERCEPTOR SEWER, REACHES 11B-15, AND THE AGUA 5 HEDIONDA SEWER LIFT STATION, PROJECT NOS. 3492, 3886, AND 3949. 6 7 WHEREAS, the City Council of the City of Carlsbad, California, has determined it necessary and in the public interest to approve Amendment No. 3 to the agreement with Brown & Caldwell, Inc.,o for the design of the replacement of the Vista/Carlsbad Interceptor Sewer, Reaches 11B through 15, 9 and the Agua Hedionda Sewer Lift Station; and 10 WHEREAS, On June 10, 2008, the City entered into an agreement with Brown & Caldwell in 11 the amount of $2,382,281 to provide engineering design and environmental services; and 12 WHEREAS, two (2) subsequent amendments have been authorized to Brown & Caldwell in 13 the amount of $98,230; and 14 WHEREAS, City staff and Brown & Caldwell have negotiated fees in an amount not-to- exceed $491,067 to provide additional engineering and environmental services for the project, as15 described in this Amendment No. 3 to professional services agreement; and 16 WHEREAS, funds have been appropriated in the 2010-2011 Capital Improvement Program from the Sewer Connection Fee Fund and sufficient funds are currently available; and 18 WHEREAS, the City of Vista will reimburse Carlsbad for their portion of the design fees as 19 stated in an agreement titled, "Agreement for Ownership, Operation and Maintenance of the 20 Vista/Carlsbad Interceptor Sewer", dated February 26, 2002. 21 NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Carlsbad, „_ California, as follows: 1. That the above recitations are true and correct. 2. That Amendment No. 3 to Agreement with Brown and Caldwell in an amount not-to- 24 exceed $491,067 for the Design of the Vista/Carlsbad Interceptor Sewer, Reaches 11B through 15, 25 and the Agua Hedionda Sewer Lift Station is approved and the Mayor is hereby authorized and 9fi0 directed to execute said amendment. 27 /// 28 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 PASSED, APPROVED AND ADOPTED at a Regular Meeting of the City Council of the City of Carlsbad on the 22nd day of February, 2011, by the following vote to wit: AYES: Council Members Hall, Kulchin, Blackburn, Douglas and Packard. NOES: None. ABSENT: None. (SEAL) NE M. WOOD, City Clerk 3 PWENG643 AMENDMENT NO. 3 TO AGREEMENT FOR PROFESSIONAL ENGINEERING SERVICES FOR THE DESIGN OF THE VISTA/CARLSBAD INTERCEPTOR SEWER, REACHES 11B-15, AND THE AGUA HEDIONDA SEWER LIFT STATION (BROWN AND CALDWELL) J"his Amendment No. 3 is entered into and effective as of the c> day of 201 J _ , amending the agreement dated June 10, 2008 (the_ "Agreement") by and-Maetween the City of Carlsbad, a municipal corporation, ("City"), and BROWN AND CALDWELL, a private employee owned company , ("Contractor") (collectively, the "Parties") for professional engineering services for the design of the Vista/Carlsbad Interceptor Sewer, Reaches 11B-15 and the Agua Hedionda Sewer Lift Station. RECITALS A. On November 30, 2009, the Parties executed Amendment No. 1 to the Agreement to provide additional engineering studies and design services; and B. On May 28, 2010, the Parties executed Amendment No. 2 to the Agreement to extend it for one additional year; and C. The Parties desire to alter the Agreement's scope of work to provide additional design services, permit assistance and environmental surveys; and D. The Parties have negotiated and agreed to a supplemental scope of work and fee schedule, which is attached to and incorporated by this reference as Exhibit "A", Scope of Services and Fee. NOW, THEREFORE, in consideration of these recitals and the mutual covenants contained herein, City and Contractor agree as follows: 1. In addition to those services contained in the Agreement, as may have been amended from time to time, Contractor will provide those services described in Exhibit "A". 2. City will pay Contractor for all work associated with those services described in Exhibit "A" on a time and materials basis not-to-exceed four hundred ninety one thousand sixty seven dollars ($491,067). Contractor will provide City, on a monthly basis, copies of invoices sufficiently detailed to include hours performed, hourly rates, and related activities and costs for approval by City. 3. Contractor will complete all work described in Exhibit "A" by June 10, 2011. 4. All other provisions of the Agreement, as may have been amended from time to time, will remain in full force and effect. 5. All requisite insurance policies to be maintained by Contractor pursuant to the Agreement, as may have been amended from time to time, will include coverage for this Amendment. City Attorney Approved Version 09.22.10 7 6. The individuals executing this Amendment and the instruments referenced in it on behalf of Contractor each represent and warrant that they have the legal power, right and actual authority to bind Contractor to the terms and conditions of this Amendment. CONTRACTOR BROWN AND CALDWELL, a private employee owned company CITY OF CARLSBAD, a municipal corporation of the State of California By:•^/C^M, C Mayor (print name/title) ATTEST 'By: (sign here) (print name/title) If required by City, proper notarial acknowledgment of execution by contractor must be attached. If a Corporation, Agreement must be signed by one corporate officer from each of the following two groups. *Group A. Chairman, President, or Vice-President "Group B. Secretary, Assistant Secretary, CFO or Assistant Treasurer Otherwise, the corporation must attach a resolution certified by the secretary or assistant secretary under corporate seal empowering the officer(s) signing to bind the corporation. APPROVED AS TO FORM: RONALD R. BALL, City Attorney By:. >eputy City Attorne City Attorney Approved Version 09.22.10 CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT gft©6eems$m©as=!a<^§esft©»<§!^^ II State of California i County of ^o.^ T^g^ ®| J S /IOn \i~ I ~s /1 £> before me, "P^V ^; CIVIL CODE § 1189 Date' personally appeared Here Insert Name and Title of the Offic/r Name(s) of Signer(s) who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument. I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. WITNESS my hand and official seal. Place Notary Seal Above Signature: OPTIONAL —• Though the information below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent removal and reattachment of this form to another document. Description of Attached Document Title or Type of Document: Document Date:. Number of Pages: Signer(s) Other Than Named Above: Capacity(ies) Claimed by Signer(s) Signer's Name: D Corporate Officer — Title(s): D Individual D Partner — D Limited D General D Attorney in Fact D Trustee D Guardian or Conservator D Other: Signer Is Representing: RIGHT THUMBPRINT OF SIGNER Top of thumb here Signer's Name: _ D Corporate Officer — Title(s): _ D Individual D Partner — D Limited D General D Attorney in Fact D Trustee D Guardian or Conservator D Other: _ Signer Is Representing: Signature of Notary Public RIGHT THUMBPRINT OF SIGNER Top of thumb here © 2010 National Notary Association • NationalNotary.org • 1-800-US NOTARY (1-800-876-6827)Item #5907 Exhibit "A" City of Carlsbad Agua Hedionda Lift Station, Force Main and Interceptors VC-11B through VC-15 AMENDMENT NO. 3 During final design for the Agua Hedionda Lift Station (AHLS) and V/C Interceptor Sewer Replacement projects for the City of Carlsbad (City), certain site conditions, additional requirements of regulatory agencies, and design changes requested by the City necessitated additional engineering services outside the original contracted scope of work and subsequent, approved Amendments No. 1 and 2. These changes have resulted in this request for additional compensation for the work performed as detailed in the following Amended Scope of Work and Additional Tasks. Table A-l summarizes the costs associated with the additional services provided by Brown and Caldwell (BC). A more detailed cost breakdown, including labor hours and cost, subconsultant fees, and other direct costs, are set forth in Table A-2 presented at the conclusion of this Amendment request. Table A-1. Amendment No, 3 Cost Summary Task No. 1.0 3.5 4.1 5.5 6.10 6.11 Description Project Management Steel Bridge Corrosion Study CEQA Permitting Trenchless Force Main Design Additional Design Effort Total Phase II Cost Total Cost $ 33,679 16,822 79,632 137,618 67,730 155,586 $491,067 The Amended Scope of Work and Additional Tasks presented below increased the design effort and associated costs to provide a complete and comprehensive set of contract documents for the 90% submittal to the City. These unique design features and the necessary attention to detail that each required exceeded the budgeted amount for the design milestone, but provide overall cost savings and value-added benefits to the City of Carlsbad, City of Vista, and other project stakeholders, including: • A reduction in constructions costs • Mitigation of risk to the Cities of Carlsbad and Vista • Improved construction sequencing • Mitigation of, or minimization of, bypass pumping • Ease of operation and maintenance Project 134967 Pagel of 6 Exhibit "A" • Lower energy costs over the life of the AHLS • Architectural and site aesthetics that blend with the coastal environment. AMENDED SCOPE OF WORK Task 1.1 Project Management The extension of the contract duration (13 months) increased project management services encompassing monthly project administration, invoicing, billing cycles, internal quality assurance, coordination and accounts payable to subconsultants and ongoing design efforts. Task 3.5 Steel Bridge Corrosion Study In October 2008, the City requested BC to evaluate the suitability of installing a steel truss bridge in the marine environment of the Agua Hedionda Lagoon. BC identified two suitable bridge types — a 150-foot clear span steel truss and a bow string truss bridge. The evaluation performed by BC at the request of the City included a corrosion study performed by V&A Associates and consultations with two manufactures of the pre-engineered trusses. At the request of the City, BC also conducted a preliminary life-cycle cost analysis, comparing a coated steel bridge versus a weathering steel bridge, and evaluated the expected life span of a weathering steel bridge located in a marine environment. Task 4.1 CEQA Tack 4.1.1 Expanded Environmental Survey The design team determined after the 50% design that it would be beneficial to widen the existing berm north of the lagoon in order to construct the new 54-inch sewer line. This was deemed desirable by all stakeholders because it would minimize the amount of bypass pumping that would be required. However, this additional improvement was not considered within the environmental survey conducted prior to this decision. The additional construction impact as a result of the berm widening requires that the area be surveyed to complete the CEQA document. Additional costs were incurred to conduct the expanded environmental survey. Task 4.1.2 Additional Agency Permitting Requirements During an Agency meeting with California Department of Fish and Game (CDFG), U.S. Army Corps of Engineers (USAGE), U.S. Forest Service (USFS), and the Regional Water Quality Control Board (RWQCB), additional permitting requirements were identified, resulting in the following actions: • Addressing the potential impacts from the relocation of the existing 12-inch natural gas line; • Addressing Coastal Commission verbal comments in the CEQA document; • Processing NMP Authorization pursuant to Section 10 of the River and Harbors Act through the USAGE; • Processing a 1600 Lake and Streambed Alteration Agreement through the CDFG; • Providing a drawing package that includes plan views of the overall project and elevations of superstructures. Task 4.1.3 Remaining CEQA Process The following tasks are anticipated for the remaining effort to complete the CEQA process. • Draft requested changes to CEQA document from Carlsbad Planning Department and SDGE. Project 134967 Page 2 of 6 Exhibit "A" Amendment No. 3 • Provide additional changes requested by Planning Department to finalize document. • Draft and modify Responses to Comments for Planning Department. • Attend Planning Commission hearing and meetings with Coastal Commission Staff, Resource Agencies and others as necessary. • Process Coastal Commission CDP for area within Agua Hedionda LCP. • Strategize and represent project at Coastal Commission hearing, as necessary. • Prepare documentation to satisfy Coastal Commission special conditions and pull Coastal Commission CDP. • Prepare and process for approval DCSS Conceptual Revegetation Plan. Task 5.5 Permitting Task 5.5.1 Additional Planning Department Requirements During a meeting held with the Carlsbad Planning Department, additional permitting requirements were identified for the AHLS project that was not originally anticipated, encompassing the following: • Mapping and figure updates to the Precise Development Plan. • Specific Plan-144 amendment, including consistency analysis. • Hillside Development Permit, including slope analysis. • Special Use Permit application, including plans. • Impact Analysis of Potential Simultaneous Projects. • Project Overview Figures. • Visual Simulations. Tasks 6.10 Trenchless Force Main Design Following the force main evaluation conducted by BC in Amendment 1, the City agreed that the force main should be designed to go under the utility tunnel on the NRG property to eliminate intermittent low and high points. Because of the increased depth required to go under the utility tunnel, it was determined that it would be more cost effective and less disruptive to use Horizontal Directional Drilling (HDD) to install the force main. Jacobs Associates, under contract with BC, conducted all trenchless design for the AHLS project. The additional design effort for BC and Jacobs is as follows: Task 6.10.1 NRG meetings for access and utility coordination. Task 6.10.2 Four-geotechnical borings and soils analysis. Task 6.10.3 HDD design services: • Preparation of a technical memorandum on the trenchless construction method proposed for the force main. • Preparation of 50%, 90%, 100% and final plans and specifications for the proposed HDD force main. Additionally, the effort required to gain access to the NRG property for geotechnical investigations, as well as negotiating additional easements, required numerous meetings and telephone calls to coordinate these activities. Project 134967 Page 3 of 6 Exhibit "A" Amendment No. 3 Task 6.11 Additional Design Effort The following tasks incurred additional labor effort above our original estimated effort due to design enhancements, energy savings, and incorporation of value engineering comments/suggestions by project stakeholders. These items entailed an additional, unanticipated design effort that resulted in the following benefits to the City and stakeholders: • Reduced operation and maintenance costs. • Improved energy efficiency. • Mitigation of risk during construction. • Lower construction costs. Task 6.11.1. Design of Terminus Structure at Encina Water Pollution Control Facility - The 50% design level revealed the significant deterioration of this vital structure that receives sewage flows from the V/C Interceptor and the Occidental Sewers. The design team took an innovative approach that mitigates construction risk and allows removal of this structure with minimal bypass pumping. The design intent also provides a new structure to accept all the incoming flows to the Encina facility and eventually replaces the existing aging structure. Task 6.11.2. Grading Revisions at the AHLS Site - Responding to 50% design comments from the stakeholders, grading changes were made to the AHLS site to minimize retaining wall height, lower the pump station profile on the site, and improve the aesthetic appeal of the facility while still maintaining site access. This change reduced the extended shaft length of the pumps to the motors. The grading improvements will reduce construction costs, but required extensive redesign of the site grading to incorporate the changed elevations. Task 6.11.3. Removal of External Force Main Metering Vault/Force Main Discharge Relocation - The pump room orientation and metering location were extensively re-designed after the 50% design review to incorporate removal of the deep, external metering vault and bring the force main electro-magnetic flow meter inside the main structure. These improvements will enhance future operation and maintenance of the AHLS. Task 6.11.4. Intermediate Mezzanine Deck Removal/Motor Room Deck Openings/Underhung Bearings — The decision to remove the intermediate mezzanine level improves equipment access and lowers construction cost and complexity. This change resulted in the additional design of large grated openings to accommodate,equipment removal, increased structural design to transmit and carry loads through the structure, and special detailing to the underhung bearing assembly to allow operator disassembly and unrestricted maintenance access. Task 6.11.5. Lift Pump Discharge Channel Removal/Eductor Assembly - This design enhancement resulted from stakeholder input at the 50% design level to eliminate any confined space entry on the lift side of the AHLS. The same inherent features were maintained in individual pump discharge and elimination of discharge check valves. An energy-saving design using dedicated eductors on the discharge of each lift pump discharge, as well as dedicated flow meters, was crafted with operator maintenance concerns in mind. Project 134967 Page 4 of 6 Exhibit "A" Amendment No. 3 Task 6.11.6. Incorporation of Reclaimed Water at AHLS Site - This design concept uses reclaimed water for significant non-potable uses on the site and avoids the use of reclaimed water within the pump station, thus avoiding an expensive dual plumbed structure. Dedicated reduced pressure principle backflow preventers were provided to allow the City to use the reclaimed water for biofilter irrigation and humidification, eductors for the lift pumps, and landscape irrigation. Utilizing reclaimed water also eliminates a separate air gap system and associated maintenance concerns within the lift station. The design enhancements incorporate the City's commitment to sustainability through the future use of reclaimed water at this facility. Task 6.11.7. 54-inch Gravity Sewer Relocation (North of New Bridge) - This significant redesign effort after the 50% submittal benefits the City and stakeholders in the sequencing/phasing of construction activities by minimizing bypass pumping of sewage during piping transitions. By realigning the new 54-inch sewer to the west of the existing 42-inch sewer, along with extensive regrading of this area and phasing the bridge package, the transfer of sewage to the new pipeline segments will be achieved with minimal bypass pumping, thus reducing risk to the Contractor and City. This benefit will translate into reduced construction cost by detailed, sequenced phasing of pipeline construction milestones. Task 6.11.8. Temporary 42-inch Bypass Structure (South of New Bridge) - Similar to the 54-inch realignment, design efforts related to this structure south of the new bridge were critical to phasing the work, coordination between the three different construction packages, and the seamless transition of sewage flows to the new system. This design enhancement benefits the City by providing clear direction to the Contractors for the bridge and lift station, sequencing the transfer of flows, and minimizing bypass pumping. This results in reduced risk to the overall project in the phasing and sequencing of construction. Task 6.11.9. 42-inch Diversion Junction Structure (South of New Station) - Similar to the above temporary 42-inch bypass connection, this structure allows construction with minimum flow disruption in the existing 42-inch sewer and minimizes bypass pumping. Task 6.11.10. 54-inch Diversion Junction Structure and Bypass Connection (South of Palomar Airport Road) - The connection to the existing 42-inch sewer south of Palomar Airport Road is similar to the previous junction structures. Design of the structure was necessary due to the inability to parallel the new 54-inch sewer east of the existing 42-inch sewer. Thus, the flow from the 42-inch sewer is intercepted north of the treatment plant, minimizing the interference and size of the new structure identified in Task 6.11.1. The diversion structure also allows construction with minimum flow disruption in the existing 42-inch sewer. The following additional tasks are in addition to the negotiated and agreed upon scope of work and were required as a consequence of the iterative nature of design, such as: • Unforeseen design refinements due to changed conditions that were not evident, nor could have been anticipated at the onset of design efforts. • Necessary redesign in order to reduce construction costs and avoid utility conflicts. • Evident improvements that improve water quality and site drainage as a result of recent changes to storm water quality regulations. Project 134967 Page 5 of 6 Exhibit "A" Amendment No. 3 • Extensive coordination with project stakeholders and landowners. Task 6.11.11. Site and Surface Water Quality Improvements - BC incorporated the latest regulatory requirements, for the following increased civil, site, and stormwater plans and specifications: • Standard Stormwater Urban Management Plan (SUSMP) - the latest regulations, incorporation of comments from the City of Carlsbad Planning Department, and CEQA requirements necessitated an extensive design effort to implement the changes to meet the latest surface runoff requirements. • Infiltration Basin Design — Incorporation of this new design feature required extensive design and site grading to the design AHLS site. Task 6.11.12. NRG 9-foot Diameter Utility Tunnel -This unforeseen utility conflict had far reaching implications that impacted the following: • Pipeline alignment • Revisions to final elevations of the lift station • Wet well and drain line elevations • Selection of pipeline construction method' A mid-span intercept horizontal directional drill construction method was selected to assure adequate clearances were maintained beneath this existing structure as well as to maintain necessary grades and other utility conflicts. This increased the complexity of the design of the pipelines south of the AHLS. Task 6.11.13. Coordination with the Poseidon 54-inch Desalination Pipeline - Crossing of this major transmission line from the planned Poseidon project required extensive redesign of the AHLS force main due to a conflict within the City easement on the Western Development property north of Cannon Road. Task 6.11.14. NRG Coordination Effort and Acquisition of Additional Property for the AHLS Site — Extensive coordination with NRG was required to enlarge the AHLS site, provide the necessary space to aesthetically blend the AHLS structures into the property, and ensure adequate site access for City and Encina Wastewater Authority maintenance vehicles. Task 6.11.15. Coordination with Sempra Utilities - Location of the bridge abutments and construction phasing required extensive coordination with Sempra to mitigate the conflicts with the 12-inch high-pressure gas line. Project 134967 Page 6 of 6 TABLE A-2 AGUA HEDIONDA LIFT STATION ADDITIONAL SERVICES FOR THE 90% DESIGN COMPENSATION BY TASK Vice President (Qa/Qc) Task Description Hourly Rates $243 PHASE U TASK 1 - Project Management 1.1 Project Management/Administrative 1.2 Monthly Project/Coordination Meetings SUBTOTAL TASK 3.5 - Steel Bridge Corrosion Study 3.5.1 V&A Corrosion Study 3.5.2 Bridge Life Cycle Cost Analysis 3.5.3 Weathering Steel Bridge Life Expectancy Analysis SUBTOTAL TASK 4.1 -CEQA 4.1.1 Addl Environmental Survey 4.1 .2 Agency Permitting Requirements 4.1.3 Remaininq CEQA Process SUBTOTAL TASK 5.5 -Permitting 5.5.1 Addl Planning Department Requirements 5.5.1 Project Overview Figures 5.5.1 Visual Simulations SUBTOTAL TASK 6.10 - Trenchless Force Main Design 6.1 0.3 Coordination with NRG Energy 6.10.2 Addl Geotechnical Borings with Hazardous Material Analysis 6.10.1 Trenchless Design SUBTOTAL Tasks 6.1 1 - Additional Design Effort 6.1 1 .1 Terminus Structure at Encina Water Pollution Control Facility 6.11.2 Grading Revisions at the AHLS Site 6. 1 1 .3 Removal of External Force Main Metering Vault/Force Main 6.1 1 .4 Mezzanine Deck/Deck Openings/Underhung Bearings 6.1 1 .5 Lift Pump Discharge Channel Removal/Eductor Assembly 6.11.6 Incorporation of Reclaimed Water at AHLS Site 6.1 1 .7 54-Inch Gravity Sewer Relocation (North of New Bridge) 6.1 1 .8 Temporary 42-Inch Bypass Structure (South of New Bridge) 6.1 1 .9 42-Inch diversion Junction Structure (South of New Station) 6.11 .10 54-Inch Diversion Junction Structure (South of PAR) 6.11.11 Site and Surface Water Quality Improvements 6.11.12 NRG 9-Foot Dia. Utility Tunnel 6.1 1.13 Coordination with the Poseidon 54-Inch Desal Pipeline 6.1 1 .14 Coordination Effort / Acquisition of Additional Property6.11.15 Coordination ™th Serrpra Utilities SUBTOTAL TOTAL FOR PHASE II Executive / Managing Engineer (PM) $226 12 40 52 4 2 4 10 16 8 24 24 32 24 8 4 8 16 116 202 Supervising Senior Engineer Engineer $195 $169 60 60 120 8 8 8 24 8 60 40 108 140 16 80 8 16 228 60 16 24 16 24 92 24 24 4 60 4 16 8 4 8 30 12 24 44 60 322 40 894 Engineer Senior III Designer $148 $139 40 160 4 40 164 24 16 40 24 32 12 100 40 40 40 32 24 24 20 20 16 24 40 408 80 612 Project Senior Word Coordinator Labor Drafter Processor H / Accountant Hours $110 $88 $96 12 84 100 12 184 12 2 12 12 2 36 4 12 60 4 44 8 116 180 240 496 12 240 688 100 16 16 80 16 196 72 24 80 16 40 232 104 16 28 24 84 40 28 32 50 40 8 48 44 100 112 998 376 2 12 2,218 Labor Cost $13,999 $19,180 $33,179 $2.256 $1.980 $2,256 $6,492 $1,792 $10,140 $7,200 $19,132 $29,580 $65.280 $1,908 $96,768 $17,092 $2,704 $13,176 $32,972 $12,816 $11,144 $2,344 $35,672 $16,904 $4,244 $11,808 $5,800 $4,012 $4,688 $7,850 $6.616 $7,160 $7,436 $17,092 $155,586 $344,129 Subconsultants(l) $0 $9,300 $9,300 $5,000 $15,000 $35,000 $55,000 $26,500 $10,000 $36,500 $12,716 $18,837 $31,553 $0 $132,353 DirectCosts(2) $500 $500 $50 $50 $100 $0 $700 $700 $50 $50 $0 $1,350 Total Cost $14,499 $19,180 $33,679 $12,486 $2,030 $2.306 $16,822 $7,292 $26,640 $45,700 $79,632 $58,730 $65,980 $12,908 $137,618 $17,092 $16,692 $33,947 $67,730 $12,816 $11,144 $2,344 $35,672 $16,904 $4,244 $11,808 $5,800 $4.012 $4,688 $7,850 $6,616 $7,160 $7,436 $17,092 $155.586 $491,067 (1) Subconsultants fees includes Brown and Caldwell's 10% standard Markup. (2) Direct Costs consist of Mileage to / from meetings, and reproduction costs for reports. CITY OF CARLSBAD AGUA HEDIONDA UFT STATION CITY OF CARLSBAD Memorandum February 22, 2011 All Receive-Agenda Item #. For the Information of the: / CITYCpUNCIL •OVsst. Date..City Manager. .www.carlsbadca.g To: From: Re: Lisa Hildabrand, City Manager - Glenn Pruim, Utilities Director //X^ stribution: City Clerk Asst. City Clerk Deputy Clerk Book Additional clarifying information for Agenda Bill item No. 3 - Approve Amendment to Agreement with Brown and Caldwell To provide additional information to Council: Sufficient funds are currently available for the completion of the project; however, certain costs related to easement acquisition and the relocation of SDGE utilities remains undefined at this time. All project related costs will be shared between the City of Carlsbad and the City of Vista as described within an existing ownership agreement between the two cities for operation and maintenance of the Vista / Carlsbad sewer system. A project specific agreement is currently being prepared to define administrative procedures and the payment schedule for the construction phase of the project. It is anticipated that the project agreement will be complete prior to April 1st of this year. Once the project agreement is executed, Carlsbad will invoice Vista for their portion of the project expenditures to date as shown in Table 2.Currently, Vista has not made any payments toward the project expenditures. Once the project enters the construction phase, Vista will be invoiced monthly for their share of the construction costs. The total project cost share between the two cities is approximately 65% Vista and 35% Carlsbad; however, the actual cost share varies with each reach of the sewer. Carlsbad's share of the project is funded from the Sewer Connection Fee Fund. The City of Vista will be issuing bonds or using State Revolving Funds to pay for their portion of the project. Table 2 CARLSBAD AND VISTA SHARE OF EXPENDITURES Expenditures to Date (12/31/10) Brown & Caldwell Amendment No. 3 Total Amount Paid by Vista to Date Amount Due Carlsbad TOTAL $3,670,708 $491,067 $4,161,775 CARLSBAD SHARE $1,325,126 $177,275 $1,502,401 VISTA SHARE $2,345,582 $313,792 $2,659,374 $0 $2,659,374 Thank you, GP/mrf City Hall 1200 Carlsbad Village Drive I Carlsbad, CA 92008 I 760-434-2820 I 760-720-9461 fax