25E - AGMT WATER ENGINEERING CONSULTING

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SCOPE OF SERVICES AND SCHEDULE Deliverables: • 30% Design Lake Renovation Plan Set (18-25 sheets) • CEQA Categorical Exemption Document Task 2: Design Development (60% plans) In the Design Development phase Dudek will incorporate comments and input from the City into the project design and advance the Lake Renovation Plan Set and project design to the 60% completion level. In this phase, we will prepare the design and facility sizing calculations for the mechanical equipment including the circulation pumps, sump pumps, water feature pumps, air compressors, aeration disks, and ventilation fans. We will also design and size all of the water circulation system piping, plumbing, and aeration tubing to meet minimum Orange County Environmental Health Division Standards. Dudek will prepare design and sizing calculation for the bio -filtration system, the macro - skimmers, and aquatic vegetation planting shelves. Dudek will prepare a draft Lake Manual which Will include a detailed discussion on the lake -fishery management, lake water quality management, lake operation, equipment maintenance guidelines and lake maintenance activities to assist City staff in the management of the lake. All of the design calculations for the lake will be included in the appendices of the lake manual. Dudek will also prepare a draft version of the project construction specifications using the boilerplate provided by the City and submit to the City for review along with a preliminary Engineer's Estimate consistent with the 60% level of completion of the construction documents. The construction cost estimate will include all elements depicted in the plan set. The cost estimate will include an Itemized breakdown to assist in budgeting. We anticipate meeting with City staff on two occasions in this phase to discuss design development and to get city Input on the design. Dudek Habitat Restoration Specialists and Landscape Architects, in collaboration with in-house Wildlife Biologists, will prepare a preliminary landscape/revegetation design solution and final landscape construction documents forthe landscape/revegetation components of the project. The extent of these services will include the following: • Preliminary design and construction documentsfor improvementsto the'Waterfowl Island and Wildlife Habitat Island", • Preliminary design and construction documents for improvements to the lake margin "Meandering Stream, Waterfall and Native Planting Area", • Preliminary design and construction documents for improvements to the lake margins associated with the "Aquatic-Wetiand Vegetation Planters" (i.e., planting strips in periodic locations along the lake margins), • Biological assistance for design and plant specification for the lake improvements mentioned above, • Preliminary design and construction documents for interpretive signage, • Cost estimating support for landscape improvements The work will include a site visit to evaluate existing conditions and available site opportunities; preparation of a preliminary landscape design solution, and design and development of planting plans (i.e., planting plans, legend, details, and notes) and a permanent landscape Irrigation system (i.e., irrigation plans, legend, details, and notes) utilizing an existing park point of connection. All project specifications for the landscape and irrigation improvements would be prepared in plan format (i.e., specifications included as plan sheets within the construction document package). It is assumed that all landscape/revegetation plans would be included as sheets within the overall engineering construction document package. r. o sal for Centennial Lake Renovation 21 25E-34