City-Wide Drainage Study Revised Scope of Services 01-28-08

Browse Search

klotz/)associates Mr. Ron Bottoms January 18, 2008 Page 2 of 13 PHASE 1: ASSESSMENT OF DRAINAGE AND FLOODING PROBLEMS This phase shall identify key drainage and flooding issues, provide a broad -based assessment of what can be done to address these issues, and define the focus for more detailed evaluation that should be undertaken to formulate a CWDS that meets the goals of the City. Task 1.1 Collect Key Data for Characterizing Existing and Anticipate Problems Meet with knowledgeable City personnel and obtain their insights to current and anticipated critical drainage and flooding problems. Collect from the City existing data such as prior drainage reports, maps, repetitive loss information, and current and likely future land use data the City may have on drainage and flooding problems pertinent to current and anticipated critical drainage and flooding problems. Collect pertinent available drainage, flood control, and drainage planning reports and documents from Harris County Flood Control District, Harris County, the City, TXDOT, and the USACE. Obtain from City and/or FEMA latest floodplain or similar flood related map data. Collect available information on floodplain limits as defined in FEMA or other similar pertinent studies. Develop preliminary information to assess improvements which may have affected 2007 floodplain delineations. Review collected information and identify pertinent data about drainage and flooding in the City for use in the modeling and identification of surveying needs. Task 1.2 Describe Watershed and Drainage System Obtain latest available information describing topographic and hydrographic information in the City, including LiDAR data (as available). Use collected information (Task 1.1) to develop map(s) defining watersheds and primary hydrographic features in the City. Task 1.3 Site Visits Conduct site visit to better understand drainage conditions in the City and clarify, as necessary and possible, information in collected data (Tasks 1.1 and 1.2) upon drainage conditions and other prior information on drainage and flood conditions. Document observations with site photos. Task 1.4 Assemble Collected Key Data Assemble collected data: • A map from which data can be viewed and planning purposes. Work with the GIS data from the City and map current watersheds using ESRI format.