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August 31, 2021 Mr. Lorenzo Wingate Assistant Director of Public Works rd 2963 N. 23 Street La Porte, TX 77571 RE: Engineering Services Fee Proposal 100 Acre-Foot Interlocal Detention Project Dear Mr. Wingate: Halff Associates Inc. (Halff) is pleased to submit our proposal to provide engineering services for the 100 Acre-Foot Interlocal Detention Pond Project for the City of La Porte in conjunction with the City of Pasadena. The purpose of this project is to perform a hydraulic and hydrologic (H&H) study and prepare plans, specifications, and estimates (PS&E) for the construction of a 100 acre-foot detention pond required to fulfill the terms of an Interlocal Agreement established between the City of La Porte and the City of Pasadena. The project area is within a 100-acre tract owned by the City of Pasadena, generally bound by Harris County Flood Control District (HCFCD) channel ID B112-00-00 to the west and W. Fairmont Parkway to the north. This proposal will address development of a drainage report in the study phase, final design plans, and construction phase services. Basic necessary services include topographic survey, geotechnical analysis, cultural resource analysis, and environmental analysis. Additional services include more detailed environmental analysis, construction staking, and subsurface utility engineering (SUE) that can be authorized on an as-needed basis by line item. In the study phase, Halff will analyze existing conditions and evaluate the proposed 100 acre-foot detention pond alternatives in order to prepare an impact analysis report to be approved by the City of La Porte, City of Pasadena, and HCFCD. After the report is approved by both entities, Halff will design and prepare construction drawings, specifications, and cost estimates required to implement the proposed improvements. The construction drawings will adhere to City of La Porte and HCFCD standards and will be submitted at three milestones: 60%, 90%, and 100%. Halff will assist the City of La Porte through the bid phase process for all project components and into construction by reviewing and responding to submittals and RFIs, preparing revisions, and preparing record drawings. The City of La Porte will serve as project coordinator and approver, and the City of Pasadena will serve as project customer and approver.