City of Lawrence

Memorandum

City of Lawrence

Utilities Department

TO:	David L. Corliss – City Manager Cynthia Wagner - Assistant City Manager Diane Stoddard - Assistant City Manager
FROM:	Nicholas Hoyt – I/I Manager
CC:	Dave Wagner – Director of Utilities Mike Lawless – Deputy Director of Utilities Philip Ciesielski – Assistant Director of Utilities Beth Krishtalka – Assistant to Director
Date:	January 22, 2014
RE:	Agenda Item - Extension of Contract with Marsh McBirney – Hach for data delivery services related to Project UT1301CS the long-term sanitary sewer flow and rainfall monitoring program.

Please include the following item on the City Commission agenda for consideration at the January 28, 2014 meeting:

Authorize the City Manager to approve a purchase order with Marsh McBirney – Hach, for continued data delivery services associated with the wastewater collection system’s long-term flow and rainfall monitoring program in the amount of $22,000.00.

Program History:

From October 2006 through December 2010, the Department of Utilities contracted with Marsh – McBirney Hach for data delivery services associated with the long-term flow monitoring program consisting of 31 flow meters and eight (8) rain gauges deployed at various locations throughout the city, see the attached Figure 1.

In 2011, in conjunction with the Wastewater Master Plan effort, Department of Utilities staff worked with Burns & McDonnell as part of the hydraulic modeling to determine a recommended flow meter and rain gauge deployment that provided for continued data acquisition to support model calibration, operational decisions, and development related capacity questions. Based on this, the system was reduced to seven (7) flow meters and three (3) rain gauges.

In 2013, two (2) meters were moved to new locations in order to determine flow rates for the future Wakarusa WWTP. Four (4) of the meters remained positioned for the continued acquisition of flow data along major interceptor lines to the existing wastewater treatment plant. The seventh location is on the bypass line of pump station PS16 located north of 6^th and Kentucky. This location is being maintained in compliance with KDHE’s requirement to continuously monitor the bypass for flow and acquire the data necessary to quantify any flows in the event that the pump station is bypassed. The ongoing flow and rainfall monitoring sites are shown in the attached Figure 2.

Program Status:

The current contract term expired in December 2013. Utilities staff recommend the continuation of the services contract for seven (7) flow meters and three (3) rain gauges currently at the locations outlined above on a month to month basis through April 2014.

The fee for data delivery services has remained the same since the original 2006 contract. The rates are $500/month per flow meter and $300/month per rain gauge. Per the contract Marsh McBirney – Hach provide all required ongoing maintenance and field services on the flow meters and rain gauges including: battery replacement, calibration, meter replacement due to damage, and service on malfunctioning units. The contract contains provisions to credit the monthly charges for flow meters and/or rain gauges that do not provide a set level of accurate data over the month. Department Staff reviews the data regularly and provides information on nonperforming meters and gauges to Marsh McBirney – Hach for the proper invoice adjustment.

The Utility Department will issue a new flow and rainfall monitoring RFP associated with the Rapid Rainwater Reduction Program in the spring of 2014. New flow monitoring sites will be established to determine the effectiveness of the program and guide future program efforts.

Project Funding:

Funding for the program comes from the 2014 Wastewater Operations and Maintenance budget.

Action Request:

Thank you for your assistance. Please advise if you have any questions.