Manatee County Government Administrative Center Commission Chambers, First Floor 9:00 a.m. - May 21, 2013
REVISED May 21, 2013 - Regular Meeting
Agenda Item #19

Change Order #2 to Work Assignment #10, SWWRF Process Modification for Nitrogen Removal and Digester Modifications


Contact and/or Presenter Information

Chris Daley-CPPB, Purchasing Division, Ext. 3048

Anthony Benitez, Project Engineer II, Public Works, Ext. 7333

Jeff Streitmatter III, Project Management Division Manager, Public Works, Ext. 7335

Action Requested
Authorize the County Administrator or his designee to execute Change Order #2 to Work Assignment #10 with CH2M Hill, Inc., increasing Work Assignment #10 by $97,746.00 from $918,748.00 to $1,016,494.00.

Enabling/Regulating Authority

Manatee County Code of Law

Background Discussion

Change Order #2 to Work Assignment #10 is a result of the failure of the sludge treatment digesters such that only one digester is fully functional necessitating the need for accelerated design, bid, and construction services of the digester modification system.  Change Order #2 adds design for a replacement influent force main to be routed to the SWWRF and sets forth evaluation of the Headworks Influent Pipe Riser Elbow location in terms of lessening the potential for erosion and expanding life expectancy before rehabilitation or replacement are necessary.

Change Order #1, approved on January 28, 2013, provided for redesign to capture the additional air demand into the aeration basins.  This redesign increased the Work Assignment amount by $49,314, from $869,434.00 to $918,748.00.

Work Assignment #10 for SWWRF Process Modification for Nitrogen Removal and Digester Modifications was approved on June 15, 2012, in the amount of $869,434.00 for modifying the nitrogen removal process and managing the waste residual process from anaerobic digestion to aerobic holding. 

County Attorney Review
Not Reviewed (No apparent legal issues)

Explanation of Other

Reviewing Attorney

Instructions to Board Records

Original to Board Records.

Original to CH2M Hill, Inc., 4350 West Cypress St., Suite 600, Tampa, FL 33607. Signature Page to Chris Daley, Purchasing Division (chris.daley@mymanatee.org), Anthony Benitez (anthony.benitez@mymanatee.org), Gwen Richards (gwen.richards@mymanatee.org) Public Works, Project Management Division.

Cost and Funds Source Account Number and Name
Recovery Zone Bonds: Acct No. 4146079080-534000/6079080-004

Amount and Frequency of Recurring Costs

Attachment:  CH2MHill CO#2 to WA#10.pdf