HomeMy WebLinkAbout43. Professional Services Agreement for Sediment Thickness Verification
I:\City Manager\Diane\1AGENDA PREP\2.9.21 Memos\43.docx Page 1 of 1
TO: Honorable Mayor and Members of the Common Council
FROM: Mark A. Rohloff, City Manager
DATE: February 4, 2021
RE: Professional Services Agreement for Sediment Thickness Verification of City
of Oshkosh Storm Water Basins / AECOM Technical Services, Inc. (AECOM)
($57,967.50)
The proper maintenance of storm water detention basins includes periodic verification of
accumulated sediment depth. Once sediment accumulates to a certain depth, the effectiveness
of the detention basins to remove sediment is reduced, and the sediment must be removed to
return the detention basin to its design requirements. The Storm Water Utility conducts
sediment depth verification studies on approximately a five-year cycle, and includes all basins
that are at least five years old at the time of the study. These studies are typically conducted in
the winter, when ice conditions exist to allow safe testing from the ice surface. The information
gathered from this study will be utilized to plan future monitoring and maintenance activities.
The Department of Public Works requested a proposal from AECOM to perform the sediment
thickness verification. AECOM was selected due to their extensive experience performing these
services and their familiarity with the City’s detention basins and our needs.
The cost of these services is estimated not to exceed $57,967.50 and will be funded from the
Storm Water Utility Operating Budget (Account #05612050-6450/Storm Water Utility-
Operations and Maintenance-Engineering Consultant Fees).
Chapter 12 of the Municipal Code provides that professional services of a specialized nature,
including engineering services, may be approved by the City Manager without the use of formal,
sealed quotes. In accordance with Section 12-16 of the Code, I am hereby submitting this report
regarding this professional services agreement.
MAR/jer