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File #: 22-1863    Version: 1 Name:
Type: CONSENT AGENDA Status: Agenda Ready
File created: 8/16/2022 In control: Water Utilities Department
On agenda: 11/9/2022 Final action:
Title: Authorize Supplemental Agreement No. 1 to the professional services contract with Gresham Smith to provide additional engineering services for the Lower East Bank Interceptor - Not to exceed $347,510.00, from $2,180,474.50 to $2,527,984.50 - Financing: Wastewater Capital Improvement F Fund
Indexes: 6
Attachments: 1. Map, 2. Resolution
Date Ver.Action ByActionResultAction DetailsMeeting DetailsVideo
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STRATEGIC PRIORITY: Transportation & Infrastructure
AGENDA DATE: November 9, 2022
COUNCIL DISTRICT(S):|910|DEPARTMENT: Water Utilities Department
EXECUTIVE: Kimberly Bizor Tolbert
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SUBJECT

Title
Authorize Supplemental Agreement No. 1 to the professional services contract with Gresham Smith to provide additional engineering services for the Lower East Bank Interceptor - Not to exceed $347,510.00, from $2,180,474.50 to $2,527,984.50 - Financing: Wastewater Capital Improvement F Fund

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BACKGROUND

On December 14, 2016, City Council awarded a professional services contract to Gresham Smith for engineering design services related to the replacement and rehabilitation of water and wastewater mains at 13 locations. One of those locations included the replacement and rehabilitation of the existing Lower East Bank wastewater interceptor system that is in poor structural condition and needs additional capacity to support ongoing and future development. The Lower East Bank Interceptor has been identified in master planning efforts as one of Dallas Water Utilities' (DWU) most critical pipeline improvement projects.

Design improvements for the Lower East Bank Interceptor were completed and the project was put on-hold until the necessary easements for the project could be acquired. Following the completion of design and prior to the advertisement for construction bids, DWU completed an updated master plan that recommended an increase to the wastewater flows to be conveyed by the Lower East Bank Interceptor. The increased flows required the Lower East Bank Interceptor design to be modified before advertising for construction bids. On September 23, 2020, a construction contract was awarded and following award of the contract it was determined that the bottom of an existing pressure storm sewer conflicted with the proposed alignment of the interceptor. The existing pressure sewer has a bottom elevation...

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