8A Inflow and Infiltration Update

Home Browse Search

I&I b/5/2008 Page 3 Additional seasonal staff position: At the May �2, 2005 City Council meeting an additional seasonal employee was authorized. We have filled this position from our pool of candidaies this year. The additional employee will begin on June 9, 2008. It is anticipated tha� this employee wiil be available for fivvelve weeks. Proposed imnrovement proiecf timeiines: Sanita sewer linin ro�ec#s: This will be a joint project with Roseville. Both Cities are currently zeviewing their records and videos, identifying candidates for this projeci, and will coordinate to have areas determined in 3une, so the project ca� be advertised and a contract awarded in July. No new update at this iirne. Manhole rehabilitation project: Manhole inspeciions have been completed for approximaiely one-half of the City. Of the approximately 350 manhales, some level of repazr is needed to a�out 130. Needed repairs vary fro�n replacing casting ri�gs and installing a chi�nney seal to regrouting manholes and repairing structural cracks or leaks. Tn 2006 and 2007 staff completed 20 repairs. In addition to the manhales inspected in 2006 and 20Q7 staff will review the results from the � 65 manholes inspected in 2008 to prioritize a rehabilitaiion project for �ater this sirmrner. In an effort to allow our staff to focus on identifying the source of I&I, we propose to assemble a manhole rehabilitation project that incorporates all leveis of repair. Staff anticipates that this project would be ready to advertise in July or August; this project will be brought back io council ta award the contract. Sum� Pump Inspeciion Pr�-am: Our first step in developing a sump pump prograrn was to compile a spreadsheet of ihe results from the 2000 inspection progxam to deiernune if there is an area in the city that should be foc�sed on sooner rather tk�an Iater, and to determine how much of a potential issue suznp pumps may actually be. The data from the 2000 inspeciion prograrn looks to be very pasitive for the n�mber of properly installed sump p�.unp cannections in the city. However vcre only have inspection records for about one third of the city. Staff has reviewed this information with Bonestroo and is recorz�.mending a re-inspeciion prograrn in conjunction with a water meter battery replacement progra�n to be cornpleted in ihe winter xzlonths ihe next three years. This sununer we wiIl be working with Bonestroo io develap this program. Initial flow analysis has pointed to an area in the city where sump pumps rnay be the cause oftk�e high flows. This area is where vve will mosi likely start our inspection pragram. We wi11 carztinue to provide updates on this item. REC�MMENDED COUNCIL ACTI�N Receive staff update on I& I project.