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klotz'� /'associates <br />July 5, 2011 <br />Mr. Julian Garza Jr., P.E. <br />Planning Department <br />Senior Engineer <br />City of La Porte <br />604 West Fairmont Parkway <br />La Porte, Texas 77571 <br />1 150 Dairy Ashford, Suite 500 <br />Houston, Texas 77079 <br />T 281.589.7257 F 281.589.7309 <br />houston.off ice @klotz,com <br />Re: Scope of work and budget for Preliminary Engineering Report to address flooding in <br />the Battleground Estates area <br />Klotz Associates Project No. 0127 <br />Dear Mr. Garza; <br />Klotz Associates is pleased to submit this proposal to prepare a Preliminary Engineering <br />Report to address the flooding in the Battleground Estates area. The City of La Porte <br />Flooding and Drainage Committee along with city staff have determined that a Preliminary <br />Engineering Report is needed for the Battleground Estates area to develop specific <br />information and recommendations on structural flooding within the Battleground Estates <br />area. Listed below is the scope of work associated with the preparation of the Preliminary <br />Engineering Report. We have included a detail scope of work below to provide the City with <br />information on the details and approach to preparing the Preliminary Engineering Report, <br />Some of the listed task items do not take much time and effort and some of the listed task <br />items will take more time and effort to complete. <br />Understanding of the Project <br />The Battleground Estates subdivision drainage is influenced by multiple channels and by <br />roadside ditch drainage. Each of the channels and the roadside ditches could impact the <br />drainage within the subdivision. The goal is to evaluate channel F101 -00 -00 and the roadside <br />ditch drainage system within the Battleground Estates area and to determine if channel <br />improvements, improvements to areas of restriction, addition of sheet flow relief systems, <br />detention or other improvements are needed to help reduce the flooding of structures. <br />Hydrologic and hydraulic (H &H) analysis of the channels would be needed to document the <br />possible change and to document the benefits and impacts to the adjacent channels. <br />The Battleground Estates subdivision includes over 220 homes, 250 lots and about 230 <br />location where roadside ditches and culverts drain the subdivision. The existing roadside <br />ditches and culverts vary in size and elevation. We propose to survey the location, size and <br />flow line of each of the exiting culverts within the subdivision and some downstrearn so we <br />can use that information to determine which culverts meet appropriate criteria in terms of <br />pipe size, flow line and channel size. We will then use the results of that analysis to make <br />