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HomeMy WebLinkAboutC31040 Section 29 Retention Basin Repairs 627-11CITY OF PALM DESERT PUBLIC WORKS DEPARTMENT STAFF REPORT REQUEST: AWARD CONTRACT NO. C 31040 IN THE AMOUNT OF $49,100 TO ENGINEERING RESOURCES OF SOUTHERN CALIFORNIA, INC., FOR DESIGN SERVICES FOR THE SECTION 29 RETENTION BASIN REPAIRS (PROJECT NO. 627-11) SUBMITTED BY: Mark Greenwood, P.E., Director of Public Works CONTRACTOR: Engineering Resources of Southern California, Inc. 3550 East Florida Avenue, Suite B Hemet, CA 92544 DATE: July 14, 2011 CONTENTS: Agreement Fee Proposal Vicinity Map Recommendation 1. Award Contract No. C 31040 in the amount of $49,100 to Engineering Resources of Southern California, Inc., (Engineering Resources) for Design Services for the Section 29 Retention Basin Repairs (Project No. 627-11); 2. Approve a 10 percent contingency in the amount of $4,910; and 3. Authorize the Mayor to execute the agreement. Funds are available in the Business Assessment District Account, 289-4374-433-3320. No General Fund money is being used for this expenditure. Background As part of the Section 29 Assessment District, a retention basin was constructed to collect the storm water from the residential and commercial areas north of Gerald Ford Drive. Water is conveyed into the retention basin from the west side of the tributary area by a concrete channel that runs parallel to the railroad tracks. At the end of the concrete channel, a pipe directs the water from the channel and down the northern slope of the retention basin. If the volume of water exceeds the capacity of the pipe, an overflow exists, which also sends the excess water down the northern slope of the retention basin. The water cascades down a mixture of boulders and concrete called rip -rap to prevent erosion of the slope. During the record rainfall that occurred at the end of 2010, a large section of the northern slope of the retention basin failed. Water was able to seep in behind the rip -rap and, due to the immense hydraulic pressure, a huge quantity of sand was eroded out from behind the rip -rap. With the supporting sand gone, the rip -rap collapsed. Staff Report Award Design Contract to Engineering Resources for Section 29 Retention Basin Repair July 14, 2011 Page 2of2 The City issued a request for proposals from design engineers to determine what specific factors caused the slope to fail, and to determine a design that will withstand the hydraulic pressures generated by the water. On June 21, 2011, staff received three proposals for consultant design services for the project. The City Municipal Code states that selection of professional engineering services shall be based upon qualifications and the consideration of costs. The selection process consists of the evaluation and scoring of the proposals (80 percent), cost proposals (10 percent), and location of the firm and subconsultants (10 percent). A proposal review committee comprised of staff numerically ranked the proposals in the areas of: qualifications of the firm and its personnel, management approach, technical approach to this particular project, and overall completeness of the proposal. The following firms submitted proposals for the project: Firm Location Engineering Resources Hemet, CA California Watershed Engineering Anaheim, CA Fuscoe Engineering Palm Springs, CA Engineering Resources received the highest overall score. The firm submitted the highest ranked proposal, demonstrating thorough knowledge of the project. Engineering Resources has successfully completed similar projects for other municipalities. Their team includes a geotechnical sub -consultant that has an office in Palm Desert. The final project scope, cost, and contract were negotiated with Engineering Resources and staff is confident in the contract amount and the value being received. Fiscal Analysis There is no fiscal impact beyond the contract amount. Once the design is complete, the project will go to bid and a fiscal analysis will be prepared for the construction of the repairs. Submitted I Ryan Gayly f Paul S. Gib OL D ninistrator Mark Gree6woo , P.E. \ Director of Pub c Works CITY A� COUNCILTION of Finance APPROVED DF.NTrT) RECEIVED OTHER. M. Wohlmuth, City Manager AYES: r r i L41 f Ilk .rJW11.� NOES: _...�._ ABSENT: ABSTAIN: VERIFIED BY: J' —_ Original on File with City rk's Office CONTRACT NO. C31040 AGREEMENT THIS AGREEMENT, made and entered into this 14th day of July, 2011, by and between THE CITY OF PALM DESERT, a municipal corporation, hereinafter referred to as "CITY" and Engineering Resources of Southern California, Inc. , hereinafter referred to as "ENGINEER". WITNESSETH: WHEREAS, ENGINEER is a corporation, the principal members of which are Professional ENGINEERS duly registered under the laws of the State of California; and WHEREAS, CITY desires to engage ENGINEER to render certain technical and professional engineering services as set forth in Exhibit "A" (Engineer's Proposal of Services) in connection with the design of the Section 29 Retention Basin Repair. NOW, THEREFORE, the parties hereto agree as follows: (1) CITY hereby agrees to engage ENGINEER to perform the technical and/or professional services as hereinafter set forth. (2) ENGINEER shall perform all work necessary within the schedules provided herein to complete the services set forth in Exhibit "A" attached hereto and by reference incorporated herein and made a part hereof. G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. C31040 (3) All information, data, reports and records and maps as are existing and available from the CITY and necessary for the carryings out of the work outlined in Exhibit "A" hereof shall be furnished to ENGINEER without charge by CITY and CITY shall cooperate in every way reasonable in the carrying out of the work without delay. (4) ENGINEER represents that, it employs or will employ at its own expense, all personnel required in performing the services under this Agreement. (5) All of the services required hereunder will be performed by ENGINEER or under its direct supervision, and all personnel engaged in the work shall be qualified and shall be authorized or permitted under state and local law to perform such services. (6) The execution of this Agreement by the parties hereto does not constitute an authorization to proceed authorized ENGINEER to proceed. CITY's Director of Public Works has not (7) The ENGINEER shall work closely with the CITY's Director of Public Works, or his designated representative, who shall be the principal officer of the CITY. The ENGINEER shall review and receive the Director of Public Works approval of the details of work as it progresses. The Registered Civil Engineer hereby designated by the ENGINEER as its representative for supervision of the work required by this Agreement is Matt Brudin, P.E., R.C.E. No. 41836. (8) The ENGINEER warrants that he has not employed or retained any company or person, other than a bona fide employee working solely for the consultant, to solicit or secure this Agreement, and that he has not paid or agreed to pay any company or person, other than a bona fide employee working solely for the consultant, 2 G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. C31040 any fee, commission, percentage, brokerage fee, gifts, or any other consideration, contingent upon or resulting from the award or making of this Agreement. For breach or violation of this warranty, CITY shall have the right to annul this Agreement without liability, or in its discretion to deduct from the contract price or consideration, or otherwise recover, the full amount of such fee, commission, percentage, brokerage fee, gift or contingent fee. (9) The right is reserved by the CITY to terminate the Agreement at any time upon seven (7) days written notice, in the event the project is to be abandoned or indefinitely postponed, or in the event the ENGINEER's services, in the sole judgment of CITY, are unsatisfactory or because of the ENGINEER's failure to prosecute the work with diligence or within the time limits specified or because of his disability or death. In any such case, the ENGINEER shall be paid the reasonable value of the services rendered, based upon ENGINEER's standard hourly rates, up to the time of the termination. The ENGINEER shall keep adequate records to substantiate costs and provide copies of original timecards in the event of termination or suspension. (10) All documents including tracings, drawings, estimates, reports, investigations and computations shall be delivered to and become the property of the CITY. CITY acknowledges and agrees that all plans, specifications, reports and other design documents prepared by ENGINEER pursuant to this agreement shall be used exclusively on this project and shall not be used for any other work without the written consent of ENGINEER. In the event CITY and ENGINEER permit the re -use or other use of the plans, specifications, reports or other design documents, CITY shall require 3 G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. C31040 the party using them to indemnify and hold harmless CITY and ENGINEER regarding such re -use or other use, and CITY shall require the party using them to eliminate any and all references to ENGINEER from the plans, specifications, reports and other design documents. (11) The ENGINEER shall comply with all federal, state and local laws, ordinances and regulations applicable to work. (12) No change in the character or extent of the work to be performed by the ENGINEER shall be made except by supplemental authority in writing between CITY and the ENGINEER. The supplemental authority shall set forth the changes of work, extension of time and adjustment of the fee to be paid by CITY to the ENGINEER, if any. (13) In connection with the execution of this Agreement, the ENGINEER shall not discriminate against any employee or applicant for employment because of race, religion, color, sex or national origin. The ENGINEER shall take affirmative actions to insure equal employment opportunity and that employees are treated during their employment without regard to their race, religion, color, sex or national origin. Such actions shall include, but not limited to, the following: employment, upgrading, demotion or transfer; recruitment or recruitment advertising; layoff or termination; rates of pay, or other forms of compensation and selection for training, including apprenticeship. This clause shall be included in each related subcontract, if any, awarded by the ENGINEER. (14) The CITY agrees to pay the ENGINEER for the work required by this Agreement on the following basis: 4 G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. C31040 ENGINEER shall submit invoices monthly for services performed in the previous month not to exceed the total contract amount of: Forty-nine Thousand One Hundred and 00/100 Dollars ($49,100.00). CITY agrees to pay all undisputed invoices within thirty (30) days of receipt of invoice. CITY agrees to notify ENGINEER of disputed invoices within fifteen (15) days of receipt of said invoice. CITY will retain Five Percent (5%) of each invoice amount, to be released upon satisfactory completion of the terms of the total contract agreement. (15) The ENGINEER agrees to complete the work and submit the Final Design engineering phase as displayed in Exhibit "A". (16) In the event that any judgment is entered in any action upon this Agreement, the party hereto against whom such judgment is rendered agrees to pay the other party an amount equal to the reasonable value of the legal services performed in his or its behalf in such action and that such amount may be added to and made a part of such judgment. (17) This Agreement shall be binding on the successors and assigns of the parties, but it shall not be assigned by the ENGINEER without written consent of the CITY. (18) The ENGINEER shall be an independent contractor, not an employee of the CITY. (19) Prohibited interests are as follows: No officer, member or employee of the CITY during his tenure or one year thereafter shall have any interest, direct or indirect, in this Agreement or the proceeds 5 G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. c31040 thereof. The parties hereto covenant and agree that to their knowledge no member of the City Council, officer or employee of the CITY has any interest, whether contractual, non -contractual, financial or otherwise, in this transaction, or in business of the contracting party other than the CITY, and that if any such interest comes to the knowledge of either party at any time a full and complete disclosure of all such information will be made in writing to the other party or parties, even if such interest would not be considered a conflict of interest under applicable laws. The ENGINEER hereby covenants that he has, at the time of this Agreement, no interest, and that he shall not acquire any interest in the future, direct or indirect, which would conflict in any manner or degree with the performance of services required to be performed pursuant to this Agreement. The ENGINEER further covenants that in the performance of this work no person having any such interest shall be employed by the ENGINEER. (20) The CONSULTANT shall indemnify and save harmless the CITY, its officers and employees from and against any liability, loss, cost or expense resulting from any injury or damage to persons or property arising out of, pertaining to, or relating to the negligence, recklessness, or willful misconduct of the CONSULTANT, its agents or employees, while engaged in the performance of this Agreement. The CONSULTANT shall submit to CITY, prior to the Notice to Proceed is issued, certification of adequate coverage for "errors and omission" insurance in amounts approved by the City Attorney. Any such insurance shall not be canceled prior to written notice to and approval from the CITY. 6 G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. C31040 (21) In case of conflicts within the contract documents, the document precedence shall be as follows: (a) This Agreement; (b) Exhibit "A" (Engineer's Proposal of Services, and any written modifications thereto). IN WITNESS WHEREOF, said parties have executed this Agreement the date first hereinabove written. CITY OF PALM DESERT Municipal Corporation Jean Benson, Mayor Date: ATTEST: Rachelle Klassen, City Clerk APPROVED AS TO CONTENT: Mark Greenwood, P.E. Director Of Public Works David J. Erwin, City Attorney ENGINEERING RESOURCES OF SOUTHERN CALIFORNIA, INC. Authorized Signature Date: G:\PubWorks\Staff Reports\2011Wuly 14\07 Award Design Contract to Engineering Resources Section 29 Retention Basin Repair P627-11\DESIGN AGREEMENT - 627-11.doc CONTRACT NO. C31040 EXHIBIT "A" ENGINEER'S PROPOSAL OF SERVICES G:\PubWorks\PROJECTS\627-11 Section 29 Retention Basin Repair\DESIGN AGREEMENT - 627-11.doc Engineering Resources of Southern California, Inc. Our commitment to our Clients has always been to provide continuity within a specific project team. Therefore, we are prepared to commit our project team to this project for the duration of each individuals work tasks or the duration of the project. At no time will a team member be removed from the project, except with prior approval of the City of Palm Desert. 1013" Gaifir F RAaxnwal'S=*en MIN Ahd4 P.E pajamnw 9 1�rCoirt MaeAW" P.E &bWWFiraxa�bxe A*dBVkW Biao hdmm aWCanaAw%,4avCLT*huau14dt*V aWCdemdwRnim HjiddW CeMdo"/ F—aieAarjxia'Ak A%dc -m F-adcAWWAk Anr+lt -w FffemicArxq5aix P.S&F- PS &E A@ Au4ndt 1LxaeXWW4 PE FL4 Sim Dmx CAa *WRe► M TECHNICAL APPROACIIWORK PLAN Project Understanding The Section 29 Retention Basin receives runoff from residential and commercial industrial developments along Dinah Shore Drive and Monterey Avenue including, but not limited to, the Enclave, Ponderosa, Lowe's and Walmart. An investigation of aerial photographs of the projects Consultant Design Services for Section 29 Retention Basin Repair Page 18 neineering Resources of Southern California, Inc. area indicate a smaller basin was originally constructed sometime between September, 2004 and December 2005. Storm flows from upstream areas were conveyed to the basin via an unlined trapezoidal channel running parallel to the adjoining railroad tracks. Storm flows entered the basin from an overflow weir located on the south side of channel. According to City records the basin was enlarged, by about 50 percent of its original dimensions, to its current configuration during late 2007. In the same time period, the existing trapezoidal channel was lined with concrete. It does not appear that the spillway from the channel was reconstructed with possible exception of the additional of rock slope protection. Other existing flood control improvements at the site include a 96-inch storm drain and headwall at the east end of the basin. In addition, there is an 18-inch pipe entering the basin near the top of slope in the northeast corner of the basin. The slope below the outlet of this pipe is protected with rock slope protection of an unknown size and dimension. Consistent rainfall during November and December of 2010 resulted in the failure and of the rock slope protection downstream of the existing spillway. As a result, a major portion of the slope protection has collapsed into the basin and the slope has failed undermining a significant portion of the spillway crest. Potential causes of the failure include: • Poorly constructed and/or compacted basin slopes. • Lack of properly designed cutoff walls and slope anchors. • Improper design and placement of rock slope protection. • Poor quality control during placement of grout within the rock slope protection. Failure of the slope and the resultant damage to the spillway have caused the City of Palm Desert to seek consultant services that will, first, identify the cause of failure and, second, produce contract documents guiding the repairs of the Section 29 Retention Basin. Consultant Design Services for Section 29 Retention Basin Repair Page 19 Engineering Resources of Southern California Inc. Work Plan The successful completion of any project is incumbent upon adequate planning and strict adherence to a cogent work plan. As part of any project undertaken by ERSC, an in-depth analysis of the tasks required to complete the project from initiation to completion is performed. This analysis results in a list of tasks that when properly arranged will allow the planning and design process to flow in a smooth uninterrupted manner from beginning to end. From past experience with similar projects, preliminaryresearch and site visits, the following work plan represents our approach to the development of contract documents for the repair of the Section 29 Retention Basin. Task 1.0 — Data Collection and Special Studies Task 1.1— Kick-off Meeting Our Project Manager and Project Engineer will schedule and attend an initial project meeting to further discuss the project with City staff. During this meeting project team members will establish appropriate lines of communication, verify the project goals and discuss the final project budget and schedule. City staff will deliver record drawings and existing studies to the Consultant. Task 1.2 — Data Collection and Review Data relevant to the analysis and repair of the facility will be gathered in three categories: Survey Data, Record Drawings and Existing Studies and Reports. Survey data will include recorded maps, easements and rights -of -way and benchmark information that will form the basis for field surveys and base mapping. Record drawings will be assembled for the existing basin, surrounding grading and streets and existing and planned flood control facilities that direct runoff to the basin. Record drawings will be utilized to establish drainage pattens, verify runoff quantities, verify basin capacity and the hydraulic profile of the Mid -Valley Channel, preparation of hydraulic models, Consultant Design Services for Section 29 Retention Basin Repair page 20 Enkineerinx Resources of Southern California, Inc. failure analysis and development of alternatives. Existing studies and reports will include hydrology studies, hydraulic calculations and geotechnical data related to the construction of the basin and surrounding improvements. These documents are relevant to establishing rate and volume ofrunoff, existing hydraulic capacity, subsurface conditions prior to construction and the failure analysis. Task 1.3 — Utility Records Acquire record drawings of wet and dry utility mains and services within the study area from local and regional purveyors. Task 1.4 — Design Survey and Base Mapping Conduct a field survey of the basin and adjoining flood control facilities. These services will included a topographic survey of the basin, cross sections and profiles of the Mid -Valley Channel, location of improvements including fencing, power poles, access ramp, spillway and failure area, limits of rock slope protection and details of the 18-inch inlet and 96-inch inlet and headwall. Field data will be reduced and compiled into a base map at 1-inch equals 20 feet with a 1-foot contour interval. Data collected during Tasks 1.2 and 1.3 will be compiled and insert into the drawing to form the preliminary base map. Project team members will conduct a site visit to compare the data in the base map to field conditions. Any deviations will be noted and photographed to justify the resulting base map revisions. Additional ground level photographs will be taken to document field conditions and establish critical areas. These photographs will augment those previously acquired by project staff. Deliverables: 1 copy of the final base map on 24x36 bound; 1 copy of the final base map in AutoCad format; 1 set of site photographs cataloged and described. Consultant Design Services for Section 29 Retention Basin Repair page 21 Engineering Resources of Southern California, Inc, Task 1.5 — Geotechnical Investigation Geotechnical analysis will include the excavation of 4 exploratory borings. Exploratory borings will be made on the east and west side of the existing spillway along to the top of the basin and in the bottom of the basin. Borings will be excavated with a truck mounted drill rig and hollow - stem augers to an approximate depth of 20 feet. Disturbed and relatively undisturbed samples will be obtained within the bores for laboratory testing. Laboratory testing will be performed on soil samples to determine soil characteristics and pertinent engineering properties that should be considered in an engineering evaluation. Testing will include soil classification determinations, in - situ density/moisture content, maximum density/moisture content, shear strength and supported and unsupported maximum slope ratio. As an optional services, infiltration rates will be determined at two locations on the bottom of the basin using double -ring infiltrometer methods. Deliverables: 2 copies of the draft Geotechnical Report Task 1.6 — Hydrology Review and summarize existing hydrologic data acquired during Task 1.2. The review will focus on criteria used to establish runoff quantities, verification of watershed boundaries and determining the rate of basin inflow from the Mid Valley Channel, subsurface drains and Technical Memorandum — Hydrology • Design Criteria • Watershed Boundaries • Runoff Quantity and Volume surface runoff. Once these determinations have been made a Technical Memorandum will be drafted and submitted to City staff for review. Subsequent to acceptance of the Technical Memorandum by City staff, inflow hydrographs will be created for use during hydraulic modeling of existing conditions and proposed alterations of the basin. Consultant Design Services for Section 29 Retention Basin Repair Page 22 Enkineerin2 Resources of Southern California, Inc Deliverables: 2 copies of the Technical Memorandum Task 2.0 — Forensic Analysis and Alternative Development Task 2.1— Forensic Analysis Project team members will review and analyze the existing data collected in Task 1.2, review studies and data generated as a result of efforts detailed in Tasks 1.5 and 1.6 and develop hydraulic models to establish a baseline condition for the system of hydraulic structures and the retention basin. Hydraulic engineers and staff from the geotechnical consultant will meet to discuss the data that has been gathered and generated to begin developing possible causes of the slope protection failure at the spillway. Possibilities that will be explored include, but are not limited to, inadequate subgrade, improper design techniques, materials used for construction and poor construction methods. The analysis will also look into the operation and maintenance of the facility. When the potential causes of the failure have been identified, further geotechnical analysis and hydraulic calculations will be prepared to help identify the most likely cause of the failure. The outcome of various meetings, data analysis and calculations will be summarized and presented to City staff for review and comment. Task 2.2 — Alternative Development Building on data and calculations generated in Task 2.1, system alternatives will be developed giving consideration to existing infrastructure, watershed hydrology and minimizing impacts to the area around the basin and the Mid -Valley Channel. The final system alternatives will be those that best fit project goals, design Technical Memorandum — Forensic Analysis and Alternative Development/Analysis Forensic Analysis • Data Summary • Baseline Condition Alternative Development • Criteria • Alternative Descriptions • Graphics Alternative Analysis • Hydraulic Calculations • Analysis and Comparison • Recommendation Consultant Design Services for Section 29 Retention Basin Repair Page 23 Engineering Resources of Southern California, Inc. criteria and provide a cost-effective method of repair. Once determined, the three final alternatives will be inserted into the base map for graphic representation and detailed descriptions of each alternative will be prepared. This information will be forwarded to City staff for review and a meeting will be conducted to review staff comments and arrive at the final alternatives. Deliverables: 2 copies of Alternative Descriptions and Graphics. Task 2.3 — Alternative Analysis A hydraulic analysis will be prepared for each system alternative under consideration. Hydraulic calculations will include flood routing and will give consideration to the system geometry, available storage capacity, system outlets, energy dissipation and basin drain time. Calculations will also be prepared showing sizing for rock slope protection, proper cross sections and toe protection. Upon completion of the system hydraulics, each alternative will be analyzed and ranked. Formal analysis will include comparison of the attributes of each system to the project goals established during Task 1.1. Additional comparison will be made on the basis of overall project cost, impacts to public infrastructure, easy of construction and other considerations. Each alternative will be ranked on the basis of all applicable criteria and the highest ranking alternative will then be recommended as the most appropriate for the repair of Section 29 Retention Basin. The final analysis will be reduced to writing and submitted as a Technical Memorandum. Deliverable: 2 copies of the Technical Memorandum Task 3.0 —Plans, Specifications and Estimates Task 3.1— 30% Project Submittal Prepare civil engineering drawings at the draft design level for City review and comment based on data and calculations prepared in previous tasks, City specifications and City and County details. The draft design will consist of the following items: Consultant Design Services joy Section 29 Retention Basin Repair Page 24 Engineering Resources of Southern California, Inc. • Title Sheet/Vicinity Map • General Notes/Typical Sections Sheet • Demolitions Plan: 1-inch =20 feet showing limits of removal, limits of grading and utility protection. • Improvement Plan: 1-inch =20 feet showing existing grades, spillway reconstruction, placement of slope protection, basin inlet reconstruction, energy dissipaters and basin grading. • Construction Details: 1-inch =20 feet showing cross sections and detail necessary to clarify construction. Based on value engineering, we will provide a draft level design that will be consistent with, but may vary slightly from the recommended alternative. Using draft level design, prepare a 30 percent complete level projection of the project cost. Detailed notes and calculations will be provided upon, request, for the cost projection. A working meeting with the City is anticipated after this submittal. Deliverables: 1 bond copy (2406) of the draft level design 1 electronic copy of the draft level design 1 electronic copy of the construction cost projection 1 electronic copy of the project hydraulic calculations Task 3.2 — 60% Plans, Specifications and Estimates Based on written comments from City engineering staff, we will revise the draft design for the 60 percent submittal and update the project cost projection to reflect the current level of design. Using the project plans, our staff will prepare project technical specifications in a format identified by the City. The specifications will consist of project specific modifications, as Consultant Design Services far Section 29 Retention Basin Repair page? ff _ .Engineering Resources gf Southern California, Inc. appropriate by construction item, to the Specifications of the City of Palm Desert, the Standard Specifications for Public Works Construction and the Caltrans Standard Specifications. A working meeting with the City is anticipated after this submittal. Deliverables: 1 bond copy (2406) of the preliminary plans 1 electronic copy of the preliminary plans 1 electronic copy of the technical specifications 1 electronic copy of the construction cost projection 1 electronic copy of the project hydraulic calculations Task 3.3 — Pre -Final, 90%, Plans, Specifications and Estimates Based on written comments from City engineering staff, we will revise the preliminary design for the pre -final (90 percent) submittal. This task includes and update of the project cost projection and modification of the technical specifications to reflect the current level of design. A working meeting with the City is anticipated after this submittal. Deliverables: 1 bond copy (2406) of the plans 1 electronic copy of the plans 1 electronic copy of the technical specifications 1 electronic copy of the construction cost projection 1 electronic copy of the project hydraulic calculations Task 3.4 — Final,100%, Plans, Specifications and Estimates Based on written comments from City engineering staff, we will revise the project design for the final (100 percent) submittal. We will also update the project cost projection and complete the technical specifications to reflect the current level of design. A meeting with the City is anticipated with this submittal Consultant Design Services for Section 29 Retention Basin Repair Page 26 Engineerinn Resources o�f'Southern California, Inc. Deliverables: 1 mylar copy (2406) of the plans 2 copies of the project specifications 2 copies of the construction cost projection 2 copies of the project hydrology and hydraulic calculations 1 electronic copy of the plans, specifications, estimates and supporting calculations. Task 4.0 — Project Coordination, Meeting and Project Management Task 4.1— Quality Control/Quality Assurance Our Project Manager will provided on -going quality control/quality assurance review of all plans, documents and calculations prior to each submittal within Task 2.0 and Task 3.0 Task 4.2 — Project Coordination OurProject Managerwill provide on -going coordination within the design team and the City, local and regional agencies and utilities for the duration of the project design. Task 4.3 — Project Meetings Key personnel will attend meetings identified herein. The meetings ofour work plan include: Kick-off Meeting Technical Submittals (4); Task 1.6 and Tasks 2.1-2.3 Progress Meetings (4); 30, 60, 90 and 100 percent Submittal Deliverables: Typed summary of each meeting (electronically in pdf format) Task 4.4 — Project Management Project management activities included under this task are intended to cover the time period from notice to proceed to the completion of the design. This work plan assumes a time period of ninety (90) days from notice to proceed. (See Project Schedule) Project management activities include: Consultant Design Services for Section 29 Retention Basin Repair Page 27 _ Enfineerinj Resources of Southern California, Inc. • Project start-up and MIS initiation • Coordination of technical reviews for the project • Monthly invoicing and budget projections • Schedule maintenance Maintaining project records • Project Close-out Deliverables: Narrative progress reports and monthly invoices KEY ISSUES AND RESOLUTION Task: 1.6 Hydrology and 2.1 Forensic Analysis Issue: Lack of Record Data Resolution: A key element in determining the cause of failure will the baseline condition. Typically, the baseline is established from data obtained through search of available records. If the data is unavailable or incomplete certain calculations will have to created. Creation of the calculations can be effected conversations with City staff and the original design engineer and by using field measurements. Task: 2.3 Alternative Analysis Issue: Hydraulic Calculations Resolution: ERSC, will prepare hydraulic calculations utilizing storage in the Mid -Valley Channel. Therefore, the basin analysis will be completed through flood routing techniques with multiple inflow hydrographs. Outflow will be based on infiltration. Slope protection will be designed based on USACE and FHWA methods. Consultant Design Services for Section 29 Retention Basin Repair Page 28 Engineering Resources of Southern California, Inc Task: 1.5 Geotechnical Investigation, 2.2 Alt. Development, 2.3 .Alt. Analysis and 3.0 Plans, Specifications & Estimates Issue: Reconstruction of Basin Slope Resolution: Slope repairs of this nature are typically made through buttressed fill. Construction of a buttressed fill may have negative impacts on the Mid -Valley Channel. To minimize costs, our Project Team will investigate alternative methods involving "keying" and "overfilling and back -cutting" to avoid the potential of removing and reconstruction portions of the existing channel. Consultant Design Services for Section 29 Retention Basin Repair Page 29 E�+ W W w h N zo 0 a W)W)to0a)tnh V �y If ►,-OD V-Cp Un0Uno co Ul)LO0C'U))n �M0co0� o N Ca0 Nto O t�Ncmw1.-00D �^ cM I�: CV w4 NO)MY) CV Cr! I\ MM0)tnN10 er I, In CV N 0) eh c'!h M r "W1 1 d°l 4! EA H9 fR N Ct? M N y N $tpU�,�,�BUl ti wl w I4VH?;Li' SQL N Y m C781i@a minIH N to N N N N 0% N sf H a _ O o c Mo amn y � � a a 2K?A�ift i► v � U C - _ U C - S�$$$ u aN�N w N .t N vN-- N `N7 coo p 11) d0 M � � a CA CA Nam' MNet,�„ tOd'Oo In OD v C~ CA C�! N 40 N 1* NMMNI-�h w G m d E tIJCAG aj G O G m E A N f 3 0 m E m C C q W m cl �. O w .N G 0 O G cp C H m mS G m m G m O qq A C O a P �m m N > m > N�ViUiViC!)f�UE" m �i U K m t)y Q._ ma m � 0O' 0 m 210 2 a m E Ea o o�d� O V m m mom ' Q jlpu°.Q4y14 ac�mrn.-aaaH� }. O V ti Z, Retention Basin 0 -cj Locator Map I Date: 5/2011 VICINITY MAP