TITLE
Consider a memorandum/resolution authorizing additional professional services for the Liberty Ditch Bank Stabilization minor drainage capital improvement project.
SUMMARY
DATE: June 20, 2017
TO: Ronald L. Olson, City Manager
FROM: David Olson, Executive Director of Public Works
SUBJECT: Authorize additional professional services for the Liberty Ditch Bank Stabilization minor drainage capital improvement project.
BACKGROUND AND FINDINGS:
In June 2014, an emergency temporary repair was constructed by City staff on a section of Liberty Ditch between the Burlington Northern Sante Fe (BNSF) railroad and Bell County Water Control and Improvement District (WCID) #1 wastewater plant on 38th Street. The repair was required due to the failure of the concrete channel adjacent to multiple critical utilities for Killeen and Fort Hood. The first repair was lost to a flood event which overtopped the channel and severely eroded the channel bank of approximately 200 linear feet. In September of 2016, the City entered into a professional services agreement with Halff Associates, Inc. (Halff) for the preliminary evaluation and final design of a permanent repair. The professional services agreement included the initial cost of $49,850.00. Since that time, staff has been working with Halff and and Bell County WCID #1 to develop a sustainable solution to the erosion and infrastructure failure in this channel. In order to account for erosion from subsequent storms and to provide a structurally sound design, additional topgraphic and geotechincal services were required. This professional services agreement amendment covers that expense and the expense to manage bid and construction phase services.
THE ALTERNATIVES CONSIDERED:
The alternatives considered included contracting with Halff for bid and construction phase services, proceeding with bid and construction phase services with in...
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