2010-06-09 CC Mtg. Handout - Laserfiche WebLink

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City of Centerville Downtown Strom WaterRedamation Page 3 6/9/10 Centerville Parks and Recreation Committee — Significant coordination with the Parks Committee will be required to work out issues related to the irrigation system location and functionality. For the purposes of this scope of work, we anticipate attending two (2) parks committee meetings. ASSISTANCE WITH FUNDING APPLICTAIONS The City has received funding for this project from the RCWD and the BWSR — Clean Water Legacy Act. Both will require submittal of documentation, etc. to collect their funds. For the purposes of this proposal, our scope will include only those activities needed prior to project award. On -going reporting required during construction will be covered in a separate proposal at the appropriate time. City staff is applying for additional funding from several other sources. We will assist them by providing technical information and documents required for these applications as requested. This work would be done at our normal hourly rates and would be considered outside the scope of this proposal since we do not know the specific requirements of these grants at this time. ASSISTANCE WITH EASEMENTS An easement along the alignment of the forcemain pipe may be necessary. The need for any easements will be identified as we work through the design. We will provide easement descriptions and sketches as necessary. This scope assumes the need for only one easement. DESIGN & BIDDING To this point we have done some preliminary storm water modeling of the pond and ditch. More detailed modeling of the ditch should be completed once topographic survey information is available. Additionally, the restriction of the existing culvert under the bike path will need to be evaluated and modifications to the pond(s) will be designed. This work will be completed by our specialized Water Resources Engineers, working in conjunction with our Civil Engineering staff. Along with hydraulic concerns, there will be significant concerns regarding erosion potential. Our specialized staff of erosion control experts will be involved to deal with those issues. Our Civil engineering staff will design the route forcemain pipes. For the purposes of this proposal, it is assumed that the route of the pipes will generally follow those shown on the attached figure. Significant deviations from this route will be beyond the scope of this proposal. We have spoken with industry representatives regarding the best approach to the design of the pumpworks and irrigation system. It is the consensus of these folks and our conclusion that the entire system should be designed and specified as part of the bidding documents. We will utilize our expertise in designing large pumping stations and forcemains and will employ the services of a specialized irrigation designer with whom we have worked in the past on similar projects. The alternative to this approach is to have the contractor submit the design of these facilities as part of the project, much like he would submit a set of shop drawings. Our staff would write what is known as a "Performance Spec ". This document would tell the contractor the basic requirements of the system, such as the pumping capacity, control capabilities, minimum quality and performance requirements, power supply location, and other such pertinent information. This approach can work in many cases and is a viable choice, given the right project. The difficulty is writing a tight enough specification which does not allow cheap designs which meet