HomeMy WebLinkAbout09/06/2016 Sewer Flow MonitoringItem VIII. C.: MOTION TO ACCEPT PROPOSAL FOR SEWER FLOW MONITORING IN AN AMOUNT NOT TO
EXCEED $29,060
Department: Public Works Department
Information:
As part of our long term maintenance commitments to the Metropolitan Water Reclamation District of Greater
Chicago (MWRDGC), the Village is required to monitor wet weather (clear water) flows in our separate sanitary sewer
system.
The separate sanitary sewer system (see Attachment A) is not designed to collect or convey substantial amounts of
wet weather flow. If these sewers become inundated with rain water during storm events, sewer surcharges or
basement back-ups can occur.
Flow monitoring these sewers during moderate rain events can help identify defects or improper connections that
introduce excessive clear water before they become problematic. Examples of defects that can contribute excess
clear water include cracks or joint separations in pipe, defective manhole lids or risers, and poor service line
connections. Improper connections include storm sewer interconnects or sump pump discharge connections.
Sewers with high flows can be examined more closely with closed circuit television inspection and smoke testing.
Identified defects can be corrected in a variety of ways including pipe lining, asset replacement, and code
enforcement of private property defects.
Staff lacks the equipment and technical resources to perform this work in-house. Therefore, outside consultants are
utilized to perform the work. The scope of work includes the provision and installation of the monitoring gear, data
collection, and the creation of a final report summarizing the season and calculation of the wet weather peaking
factors.
All of this work will be performed between September 15 and November 30, 2016. This proposed contract is for
2016 work only.
For 2016, five (5) separate sanitary sewer basins are to be monitored. These basin locations are depicted in
Attachment B.
A Request for Proposals (RFP) was sent to area consulting engineers who have performed these services for the
Village or for the MWRDGC in the past. Three (3) area firms with experience in sanitary sewer flow monitoring
responded including Burns & McDonnell of Downers Grove, Illinois, Baxter & Woodman of Crystal Lake, Illinois, and
ADS Environmental of Huntsville, Alabama.
Proposals were reviewed by engineering and water/sewer maintenance staff. Evaluation criterion included
responsiveness of proposal, proposed schedule, experience, proposed staff assignments and utilization of
technology. Following are the results of staff's evaluation:
Baxter & Woodman 28/30 points
Burns & McDonnell 27/30 points
ADS Environmental 22/30 points
The highest rated firm is Baxter & Woodman Consulting Engineers. Baxter & Woodman is familiar with the Village's
sanitary sewer system and is familiar with the requirements of the MWRDGC. The firm has previously performed this
type of work for the Village and other MWRDGC communities. All of their work has been satisfactory.
Baxter & Woodman has proposed a fee of $29,060 for the work. This fee includes the cost of equipment rental (flow
monitors), installation, data collection, analysis, and final report generation. They intend to apply 200 hours of senior
engineer work to the project which equates to a reasonable and competitive $145 hourly rate.
Alternatives:
1. Accept recommended proposal for Sewer Flow Monitoring.
2. Discretion of the Village Board.
Budget Impact:
This proposed award requires the expenditure of $29,060 from the Water/Sewer Enterprise Fund. Sufficient funds
exist in the current budget.
Recommendation:
Staff recommends accepting the proposal from Baxter & Woodman Consulting Engineers of Crystal Lake, Illinois for
Sewer Flow Monitoring in an amount not to exceed $29,060.
SUPPORTS THE FOLLOWING STRATEGIC PLAN GOALS:
INFRASTRUCTURE: Well designed, well maintained public spaces and facilities
ATTACHMENTS:
Description Type Upload Date
AttachmentMap of
D Separate Sanitary Sewer Cover Memo 8/30/2016
Basins
Attachment B Map of
D 2016 Flow Monitoring Cover Memo 8/30/2016
Basins
File Name
VI LLAGE_W I DE_BASI N_MAP_(2).pdf
FLOW—MONITORING—BASIN MAP.pdf