[twoplanekid]

From the agenda packet of the NSCUDD March 13th, 2023 board meeting.



TO: North Sumter County Utility Dependent District
FROM: Bruce Brown, Assistant District Manager
DATE: March 13, 2023
SUBJECT: Approval of Additional Services to be performed by Operations
Management International, Inc. (Jacobs) for the Unidirectional Flushing
of the VWCA Irrigation System.
ISSUE:
Approval of Additional Services to be performed by Operations Management
International, Inc. (Jacobs) for the Unidirectional Flushing of the VWCA Irrigation
System.
ANALYSIS/INFORMATION:
Pursuant to Article 3.02 – Additional Services, in the agreement dated August 20, 2013
(as amended year over year) between Operations Management International, Inc. and
North Sumter County Utility Dependent District, staff has negotiated a contract
addendum for additional services and compensation for the performance of certain
agreed upon capital improvement projects. Many of the projects can be self-performed
by Jacobs staff, thereby reducing District time and resources for the procurement and
oversite process.
On April 11, 2022, the NSCUDD Board approved the Additional Services Agreement
with Jacobs for the development of an unidirectional flushing (UDF) plan for VWCA and
SWCA. Flushing of irrigation system pipelines is an essential part of the maintenance
program for long-term success with irrigation systems. Flushing prevents the
accumulation of small particles and build-up, which can lead to plugging issues. Due to
the size of the VWCA system, the area was divided into 90 flushing zones with a total of
944,044 feet of pipe. To develop the UDF plan, Jacobs performed a flushing test in the
Village of Winnifred (Zone 10) and field data was collected for calibration of the
hydraulic modeling used to create the UDF plan and to determine the level of effort
needed to flush the entire VWCA irritation system (Districts 5 - 8). Data gathered was
used to extrapolate and calculate unidirectional flushing to the entire irrigation system.
It is estimated that to flush all zones, which includes adjusting a total of 3,556 valves
and flushing 1,493 hydrants, approximately 6,000 manhours with a recommended crew
of three staff to carry out the work would be needed. The attached Additional Services
Agreement scope of work is for the implementation of the unidirectional flushing
program for VWCA and will include all 90 zones in the VWCA service area. The
anticipated start date of the flushing is April 1st and will take approximately 50 weeks to
complete. The not to exceed cost for this project is $300,000.Page 67 of 193

You are always invited to attend an NSCUDD board meeting. I am on the NSCUDD board.