2009-08-24 Regular Meeting, Public Hearing and Workshop Meeting of La Porte City Council minutes

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k lot z 4~. ass 0 cia t e s Mr. Ron Bottoms September 3,2009 Page 2 of5 produce. If impacts do occur, mitigation will be required. The PER will quantify the impacts and propose a form of mitigation in order to eliminate the impacts. All proposed development draining directly to Harris County facilities require a review by HCFCD for impacts to flood waters. HCFCD is the local regulatory branch charged with Stormwater Management compliance for all projects draining to, or within, Harris County main- stem streams. As a participant in the National Flood Insurance Program (NFIP) proposed new development and significant redevelopment draining to County drainage facilities cannot result in increased adverse peak discharges and/or adverse increases in water surface elevations in receiving streams. As part of our services, Klotz Associates will prepare an impact analysis report for submittal to the HCFCD for review. This signed and sealed report will be submitted to HCFCD and will describe the methods used to determine impacts and provide mitigation for those impacts. The purpose of the study is to demonstrate that the proposed improvements will have "no-impact" on receiving streams for storm frequencies up to, and including, the 100-year rainfall event. Included in the report shall be calculations, maps, and supporting data provided by both parties. Coordination between the City of La Porte and Klotz Associates will be required and include emails, meetings, and telephone conference calls as necessary through the completion of the project. On receipt of written notice-to-proceed, Klotz Associates will perform professional engineering services for the City as listed under the Scope of Basic Services described herein and in accordance with the Letter of Agreement for Consulting Services. SCOPE OF BASIC SERVICES A. Proiect Planning and Initiation 1. Develop Project Plan, kickoff meeting, resource allocation & schedule. 2. Meet with both the City and HCFCD. 3. Klotz Associates will gather design data as needed from other sources. The City will provide record information, in lieu of as-built drawings, for roadways and utilities (storm, water and sanitary) within the project limits and the City will survey the house slab elevations. Any information not provided by the City will be obtained and invoiced to the City. 4. Coordinate with surveyor to obtain detailed survey. B. Analvsis 5. Develop XP-SWMM models for the existing storm sewer system and existing overland sheet flow patterns.