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City of San Marcos <br />Columbia St. Wastewater Improvements <br />Attachment A — Scope of Services <br />13 December 2016 <br />PROJECT DESCRIPTION SUMMARY <br />The work shall consist of professional engineering design services for the Columbia St. Wastewater <br />Improvements Project including preliminary, design, bidding, and construction phase services for the <br />sewer line improvements along Columbia Avenue from Marlton to Prospect (approximately 2,000 LF). <br />The scope includes the design for reconstruction of the existing drainage crossing (4x4 box culvert) at <br />Hazelton (approximately 43.5 LF crossing). The wastewater line is proposed for improvements due to an <br />existing sag in the line. The project is located entirely within the Edwards Aquifer Recharge Zone. <br />Additionally, the scope includes design for approximately 250 LF of water line that is proposed for <br />replacement along the Progress dead end road, to the southwest of Columbia. The water line will be <br />upsized from 2 -inch to 8 -inch diameter. <br />BASIC SERVICES <br />PROJECT MANAGEMENT & QA/QC <br />Includes project set-up/close-out; communication with the City; subconsultant management; managing <br />staff resources, files, budgets, and schedule; project invoicing; and project QA/QC throughout the <br />duration of the project. <br />PRELIMINARY PHASE (30% <br />■ Meetings. Includes one (1) 30% Review Meeting and one (1) site visit. A kick-off meeting and <br />utility coordination meetings are not included. <br />■ Data Collection and Review. Collect and review previous project records and available base map <br />information including City GIS, aerial imagery, floodplain mapping, and property parcels. <br />■ Provide Topographic Surveying. Byrn & Associates will provide topo survey to include: <br />1. Provide horizontal and vertical control for topographic survey. <br />2. Topographic survey. <br />3. Locate above ground planimetric features, including existing structures, edge of roads, <br />evidence of underground utilities, overhead utilities, fences, trees 6 -inches in diameter <br />and larger, ditch flowlines and other pertinent features affecting design. <br />4. Water valve top of nut elevations. <br />5. Locate enough boundary information for determination of street right of way lines. <br />6. Contact Digg-Tess for location of existing underground utilities <br />7. The topographic information will be provided in Autocad format with a triangulation <br />network of the existing surface. <br />■ Perform Utility Coordination including contacting area utility providers via email to request <br />utility records and information regarding any planned projects within the project area. <br />■ Evaluate proposed wastewater and water alignment option(s) and develop schematic drawing(s). <br />The drawing will be roll plot of plan view only. <br />■ Provide preliminary hydraulics evaluation for the proposed wastewater line including spreadsheet <br />model evaluation of the existing and proposed pipe capacity and scouring velocities. <br />■ Evaluate construction considerations related to the reconstruction of the storm drainage culvert <br />crossing. Scope does not include determination of alternative alignments or hydraulics/modeling <br />related to the drainage crossing. <br />A-1 <br />