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111 <br />Mx. Lorenzo Wingatemom CiLv of La Porte <br />MAN HALFFJanuary 29, 2020 <br />Revision 3 <br />Page 3 <br />Attachment "A" <br />The purpose of this proposal is to develop a PER, final design plans, and construction phase services for <br />the Bayside Terrace Subdivision Drainage Improvements project. The proposed project area can be seen <br />in Attachment "C". <br />SCOPE OF SERVICES <br />Preliminary Design Phase Services: <br />Task 1 — Preliminary Engineering Report (PER) <br />The Preliminary Engineering Report will summarize findings from the drainage analysis and present <br />alternative options to the City of La Porte for their approval. The PER may consider presenting the <br />project in multiple phases based upon available funding. Preliminary Engineering Report services <br />include: <br />a) Reviewing all available record drawings and drainage reports to determine potential utility <br />conflicts and constraints. <br />b) Performing existing conditions hydrologic analysis and delineate existing drainage basins to <br />determine drainage boundaries, flowrates, and outfall locations. Existing conditions hydraulic <br />analysis will quantify water surface elevations of roadside ditches. <br />c) Evaluating three proposed alternatives: <br />• Concrete or asphalt with curb and gutter/storm sewer <br />• Concrete or asphalt with roadside ditch system <br />• Concrete or asphalt with combination storm sewer and roadside ditch system <br />d) Providing estimated construction costs for each alternative developed. <br />e) Providing provide a final recommendation to the City of La Porte for their approval in the form of <br />a report. <br />f) Prepare presentation and attend Drainage Committee meeting to present findings and <br />recommendations. <br />Final Design Services: <br />Task 2 - Topographic Survey <br />Topographic survey will be delivered in AutoCAD Civil 3D format with field notes and ASCII files of all <br />points obtained. A DTM will be created to generate 1 -foot contours. <br />a) Full topographic survey from ROW to ROW with cross-sections at 100 -ft intervals, including: all <br />existing appurtenances, water meters, valves, valve boxes, fire hydrants, improvements within the <br />ROW (landscaping, mailboxes, etc.), trees, driveways, storm and sanitary flowlines, ditch and <br />culvert flowlines, pipe sizes and materials, power poles, fences, etc. Obtain private utility records <br />and incorporate into base drawing. Delineate public ROW based on land property monuments and <br />deed records. Provide RPLS signed and sealed survey control maps in PDF format <br />