HDR Engineering Inc. 12/16/2022 - Laserfiche WebLink

City of Everett – Replacement of Reservoir 3 1 Scope of Services EXHIBIT A SCOPE OF SERVICES Background Reservoir No. 3 was originally constructed nearly 100 years ago as a below grade square concrete reservoir with a capacity of 20 million gallons (MG). A cover was constructed over the reservoir approximately 30 years ago and has been determined to be in need of repair. HDR performed a seismic evaluation of Reservoir No. 3 as part of the 2020 Comprehensive Water Plan (CWP) and determined that retrofitting the reservoir’s cover to meet current seismic codes would be cost prohibitive and difficult to construct. Taking the existing reservoir offline for an extended period of time is not feasible. In addition, there is a significant risk that the existing reservoir’s embankments could not survive a large seismic event (Magnitude 7.4 South Whidbey Island Fault (SWIF) Scenario as required by IBC 2018/ASCE 7-2016), causing a structural failure of the reservoir. The City of Everett, Washington (City) recently decided to embark on this replacement of Reservoir No. 3 as quickly as possible because of the reservoir cover’s rapidly deteriorating structural condition. The objective of this project is to design and prepare plans, specifications, and estimate (PS&E) for the construction of a minimum of two ground storage reservoirs (GSR) totaling a minimum of 20 MG storage to meet current seismic code requirements. The project will be implemented in two separate design phases and performed under separate construction contracts with approximately half the required reservoir storage (10 MG) completed in Phase 1 while the existing 20 MG reservoir remains in service. Phase 2 will be constructed once the Phase 1 reservoirs have been placed in service and will include the demolition of the existing 20 MG reservoir and construction of the remaining 10 MG reservoir capacity. The final storage capacities of the replacement reservoirs are estimates only and may be adjusted based on the results of the system analysis that will be performed as part of this project. Project Assumptions 1. Project duration for this scope of services will be four years to cover the extents of the design and construction duration for both phases of the project. 2. Client shall provide review comments in a timely manner, within two weeks of submittal receipt. 3. Client is requested to coordinate all review comments (resolving internal conflicts in comments) prior to return to HDR. 4. HDR has a reasonable right to rely on data and information provided from the City for use in this scope of services. 5. Any Opinion of Probable Construction Costs (OPCC) provided by HDR will have a range of accuracy based upon Association for the Advancement of Cost Estimating (AACE) International Recommended Practice No. 18R-97 and will be made based on information available to HDR and on the basis of HDR's experience and qualifications and represents its judgment as an experienced and qualified professional engineer. However, since HDR has no control over the cost of labor, materials, equipment, or services furnished by others, or over the contractor(s') methods of determining prices, or over competitive bidding or market conditions, HDR does not guarantee that proposals,