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TO: Mayor Richard C. Irvin
FROM: Mark Phipps, Engineering Coordinator
DATE: November 2, 2020
SUBJECT:
Resolution to award a contract to HR Green, Inc. in the amount of $176,350.00 for final engineering and construction observation for the Mastodon Lake Dredging and Shoreline Restoration project. (Ward 3)
PURPOSE:
To improve water quality in Mastodon Lake, improve shoreline aesthetics, and make the shoreline less susceptible to erosion.
BACKGROUND:
Mastodon Lake was excavated in the 1930s during the construction of Phillips Park. Over the years, sediment and decaying organic matter have accumulated at the bottom of the Lake to an average depth of nearly 2 feet. The average water depth throughout the Lake is now only 2.5 feet. Such a shallow aquatic system is susceptible to warming, excessive nutrients, and becoming overrun with algae and other aquatic vegetation. These conditions are unsightly and limit recreational opportunities, such as boating and fishing. Representative photographs of the Lake during summer months are attached as Exhibit A. Within the past few years, the City has used an herbicide to control the growth of aquatic vegetation and has vacuumed the sediment near the intake for the Phillips Park Golf Course's irrigation system, but these are not long-term solutions to the problem.
HR Green, Inc. completed a Stormwater Master Plan for Mastodon Lake in early 2020. In order to improve the health of the Lake, the Plan recommends dredging, improving water circulation, and restoration of the shoreline.
Before selecting HR Green to work on the Stormwater Master Plan for Mastodon Lake, the City issued a Request for Qualifications to over 200 vendors in our Professional Services category. Statements of Qualifications were received from eleven (11) firms. A three (3) person panel from the Engineering Division rated HR Green as the most qualified firm for the Stormwater Master Plan project.
DISCUSSION:
Having recently completed the Stor...
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