Laserfiche WebLink
Public Works Memorandum <br /> NO. 2014-27 <br /> DATE: June 26,2014 <br /> TO: Honorable Mayor McElroy and City Council <br /> FROM: Ryan P. McCrady, City Manager <br /> Richard G. Marley, P.E., Public Works Director <br /> SUBJECT: 2014 Sanitary Sewer Herbicide Root Control, City Project 2014-31 <br /> SUMMARY RECOMMENDATION: <br /> It is recommended that the City Council approve the attached resolution awarding the contract in <br /> the amount of$196,205 for Multi-Year Sanitary Sewer Herbicide Root Control, City Project 2014- <br /> 31,to National Power Rodding Corp., as the lowest qualified bidder and that the Mayor be <br /> authorized to execute the contract and the City Clerk to attest. <br /> PRIOR COUNCIL ACTION: <br /> The City Council approved the FY 2014 Capital Improvements Plan which allocated funds for this <br /> proj ect. <br /> BACKGROUND: <br /> Sanitary Sewer Priorities <br /> Under the direction of the City Council,the Public Works Department has established four priorities <br /> to improve the City's sanitary sewer collection system as defined in the Sanitary Sewer Master <br /> Plan. <br /> 1. Critical Large Diameter Sewer Rehabilitation. <br /> 2. Sanitary Sewer Overflows Due to Inflow and Infiltration. <br /> 3. System Operation and Maintenance <br /> 4. Small Diameter Sewer Rehabilitation <br /> The Multi-Year Sanitary Sewer Herbicide Root Control Project primarily addresses priority number <br /> 3 by removing the roots in the sewer. Secondarily,the work also addresses priority 2 by helping to <br /> restore the full capacity to pipes with root intrusions which will decrease the amount of sanitary <br /> sewer overflows and basement backups. It should be noted that root intrusion into a sewer is a sign <br /> of infiltration and simply removing the roots does not reduce ground water leaking into the pipe. <br /> Multi-Year Sanitary Sewer Herbicide Root Control Project <br /> Sanitary sewer lines are extremely susceptible to root intrusion due to the type of pipes historically <br /> used for construction of sanitary sewers and the tenacity of tree roots which push into sanitary <br /> sewers to find a reliable source of year round moisture. Roots penetrate sanitary sewers through <br /> joints, service laterals, connections and cracks in search of water. Unless they are removed, roots <br /> will grow to fill the pipe, trapping solids and impeding flow, often causing sanitary sewer backups <br /> and overflows. <br /> Page I 1 <br />