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HomeMy WebLinkAboutWinzler & Kelly 2010-03-09; Amendment 1 2010-04-08CITY OF UKIAH AMENDMENT NO. 1 TO AGREEMENT FOR PROFESSIONAL CONSULTING SERVICES DATED MARCH 9, 2010 TERMS AND CONDITIONS All terms and conditions of the Agreement for Professional Consulting Services dated March 9, 2010; shall remain in force and effect except as modified by this first amendment. AUTHORIZATION Upon execution of this amendment, service provider is authorized to provide the service described under the Scope of Additional Work identified in this Amendment No. 1. SCOPE OF ADDITIONAL WORK Work authorized by this amendment shall include that work described in the March 2, 2010 letter from Winzler & Kelly. A copy of said letter is included in this first amendment as Attachment "A". Certain tasks in Attachment "A" may or may not be completed depending on completion and evaluation of various project milestones. Project work on Task 8 shall not proceed prior to receiving specific written authorization from the City of Ukiah. Project work on Task 10 shall not proceed prior to receiving specific written authorization from the City of Ukiah. COMPENSATION Compensation for the performance of the additional work shall be made on a time and expense basis at Consultant's customary fees. Fees and expenses shall not exceed a maximum total cost of $29,000. Amendment No. 1 to Agreement for Professional Consulting Services Winzler & Kelly WINZL.EIZ KELLY March 2, 2010 City of Ukiah Department of Public Works Mr. Alan Hasty 300 Seminary Ave. Ukiah, CA 95482 Attachment "A' Re: Fee Proposal for Requested Supplemental Services, Redwood Business Park Transportation Improvements Project, City of Ukiah Dear Mr. Hasty: Enclosed please find our proposal for the supplemental services requested by the City on the Redwood Business Park Transportation Improvements Project. The scopes of work, fees and assumptions for the supplemental tasks are identified below for your consideration and approval. Once approved, it is our understanding that the supplemental tasks will be appended to the original contract of work with the City of Ukiah for this project. This fee proposal is based upon our conference call with Mr. Sage Sangiacomo on March 1, 2010, our project kickoff meeting discussions and our additional investigations. The summary of Supplemental Service Tasks and fees follow; Tasks I through 5 are identified in the original contract proposal. Task 6 - Delineation & Survey of Wetlands and Waters of the U.S. Conduct a delineation of potential wetlands and waters of the United States in accordance with the U. S. Army Corps of Engineers (Corps) 1987 Manual and the Arid West Supplement for the proposed project. A report that describes the findings of the delineation will be prepared that can be submitted to the Corps for their jurisdictional determination. The report will include a delineation map, data sheets, and supplemental information to support the delineation analysis. A site visit with the Corps is included in the scope as they usually conduct a site visit to confirm the delineation. Mr. Alan Hasty March 2, 2010 Page 2 The delineation will include the information required by the Corps to make a formal jurisdictional determination. Assumptions: ® We require access to all project reports, and maps relating to the site's environmental resources in order to provide the described scope of services in an efficient manner. It is assumed that City will provide site plans, base maps, and grading plans, as needed. This scope of work is provided as complete. Related services not included in this scope may include, but are not limited to, focused wildlife or plant surveys other than those described above, analysis of impacts, extensive or protracted agency negotiations, beyond what is described, development of conceptual or detailed mitigation plans, attendance at any meetings other than those described, additional team coordination, completion or review of any CEQA or NEPA documentation, response to comments, additional City or agency coordination, presentations, or attendance at public hearings. ® No guarantees, expressed or implied, are made regarding final approval or acceptance by agencies of survey results, project plans, or mitigation measures. The boundary of the wetland will be GPS surveyed from the outlet of the cross culverts at the south end of Airport Park Boulevard (Task 5) along both sides of the wetland up to a point approximately 500 feet downstream from the watercourse crossing in Task 7 (as needed). The intent is to delineate the areas adjacent to the streets, but also the limits of the wetlands which divide the property east of Airport Park Boulevard and northerly of Airport Road (extension). Areas with a top of bank will be noted accordingly. This task does not include the possible wetland delineation upstream from the culvert crossing of Airport Park Boulevard (Task 5) upstream and west to Airport Road. Task 7 - Parallel Environmental Review & Material Pre-purchase <NIC> Task 8 - Structural Engineering and Geotechnical Evaluation (at Talmage Road) This task includes structural engineering and related efforts for the design of a retaining wall required to retain the slope for the proposed widening of Talmage Road, west of the SB US 101 off-ramp. This task also includes the geotechnical investigation for the retaining wall, assumed to be in the range of 4 feet to 8 feet high and 80 feet to 140 feet :L long, will include two borings to depths of 30 feet, laboratory testing, and a supplemental report section to the geotechnical report. A geotechnical engineer from Rau and Associates, Inc. will log the borings and collect soil samples. The laboratory testing will include one remolded shear test to aid in determining the active, at-rest, and passive pressures about the wall, one Atterberg Limits test to determine Mr. Alan Hasty March 2, 2010 Page 3 plasticity of soils, four moisture/density tests, four abbreviated hydrometer tests to determine percentage of silt and clay, and one gradation. A supplemental section will be added to the geotechnical report for the project to describe conditions encountered and provide design parameters for the wall, including maximum design bearing pressure, at-rest and active pressures, and passive pressure, as well as recommendations for subsurface and surface drainage around the wall. Assumptions: ® It is assumed that the soils encountered in the borings will not have significant depths of strata subject to liquefaction. If weak soils are encountered ( standard blow count lower than 7 blows per foot) for any significant depth, additional work may be necessary to determine the effect of seismic forces on the wall and/or fill, as it may cause lurching, seismic consolidation, or liquefaction with resultant differential settlement. ® It is assumed that the retaining wall will not require Caltrans design approval. The retaining wall will be constructed of standard Caltrans-style cast-in-place concrete and will not require aesthetic fascia. It is understood that this service is desired by the City, if it is required to complete the project. At this point, it is unknown if retaining walls will be needed for completion of the project. It is understood that the project fee may be increased and this budget held until a determination is made by the project team and City. Task 9 - Turning Movement Review & Traffic Counts This task includes collection of baseline traffic data for four intersections within the project limits. In addition, vehicle classification counts will be performed to better understand the vehicle-type usage on Airport Park Boulevard. Upon collection of the data, analyses will be performed on the Talmage Corridor, State Street/Hastings, and Airport Park Blvd/Commerce Intersections. From the analyses the designers wilt be evaluate the alternative designs proposed for the Airport Park Boulevard and Talmage intersection; the analysis will also assist in the design and layout o the other signalized project intersections. Task 10 - Cold Foam In-Place Recycling (CIPR) Investigation & Design Airport Park Boulevard is a candidate for the cold foam asphalt in-place recycling process because of its existing pavement section. This method may be superior to conventional construction due to many reasons: It is a "green" process, reusing existing in-situ materials In consideration of the high volume of adjacent businesses, the CFIPR process could minimize disruption during construction due to the relatively quick preparation time and ability to drive on it after compaction May be more cost efficient than conventional methods Mr. Alan Hasty March 2, 2010 Page 4 Task 10.1 CFIPR Investigation This task includes the evaluation of the CFIPR process to confirm final applicability, projected projects savings and estimated benefits to the construction schedule. This task will be performed once the Traffic Index (TI) is confirmed in Task 9 Turning Movement Review & Traffic Counts analysis. With the TI information in hand, the CIFPR will be reviewed as noted and considered for incorporation into the project. Task 10.2 CFIPR Field Exploration and Design This task includes performing up to 6 digouts in the northerly 1960 feet of Airport Park Boulevard (per RFP project identification graphic). Dynamic Cone Penetration tests will be performed at each digout location and others as necessary. The soils from the digouts will be analyzed and the results will be used to support the cold foam asphalt in-place recycling (CFIPR) pavement section. These soils will be ground to match the mixing machine's grain size distribution; the materials will be reconstituted and amended with lime, cement or fly-ash as necessary. Trial batches of foamed asphalt will be created and tested in the laboratory. From split tensile testing, a final recommendation will be made on foamed asphalt concentration, section thicknesses and amendments will be developed. The data and project findings will be presented in a summary report. Assumptions: ® Per the RFP, the Traffic Index for the CFIPR pavement section will be 8; if a larger TI is required (i.e. 9 or 10), this recycling process may not be applicable. Because of the high concentration of truck oriented businesses in the business park, task 9 will identify the percent of truck traffic for analysis and confirmation. • Field work will be performed during the work week between 9 am and 3 pm.; traffic control will be provided. • City permit fees will be waived. ® The southern-most 700 feet of Airport Park Blvd appear to have an overlay; if this section requires full rehabilitation, along with Commerce which is in poor condition, those areas can be included in this scope for an additional $3100. ® Budget for Task 10.2, which is estimated at $16,300, will only be used upon approval from the City of Ukiah and pending Task 10.1 results. We appreciate the opportunity to submit this fee proposal to the City for this important project. Thank you again for considering Winzler & Kelly to be part of your team. We look forward to further discussing our proposal and approach with the City. Mr. Alan Hasty March 2, 2010 Page 5 Please do not hesitate to contact me if there are any questions, concerns or if you need any additional information. Sincerely, WINZLER & KELLY William Silva, PE Project Principal am