Agenda Packets - 2008/12/22 - Laserfiche WebLink

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December 22, 2008 Item No. 7C Page 4 The final list of features for the 2009-2010 Street and Utility Improvement Project provided in the RCWD permit application included only 64 infiltration basins. The permit application has been reviewed and accepted by the RCWD Staff, and received conditional approval (CAPROC) at the December 10, 2008 RCWD Board meeting. Therefore the City can be fairly confident that no further revisions to the list of infiltration features will be needed. Included with this Staff Report are figures showing the 117 infiltration features included on the preliminary list from the September notifications. On those figures, the features that have been able to be removed from the list are also indicated. It should be noted no preferential treatment was given to those properties that had appealed the SIP. All features were reviewed on the equal basis of the criteria noted above. Of the four properties who appealed the SIP, one property had its infiltration feature removed. Staff feels it is still appropriate and important that the SIP continue to be applied on the criteria established for the program, to maintain objective views on the matter. The figures included with this Staff Report indicate those properties that had submitted an appeal to the SIP. Finally, it should also be noted that in addition to reducing the number of infiltration basins needed, the final direction received from RCWD also allowed the depth of the basins to be reduced from 12-inches to 6-inches. This is shown on C1.03 of the plans, included with this Staff Report. The reduction in the number and depth of the infiltration basins resulted in an estimated construction cost savings of approximately $60,000 for the project. x Ardan Avenue Drainage Subdistrict Analysis: The Ardan Avenue Drainage Subdistrict Analysis was authorized by the City Council on November 24, 2008 under Resolution 7361. The complete results of the Analysis are being presented to the Council under a separate agenda item at the December 22, 2008 meeting. The findings included one recommended storm sewer improvement to be included in the 2009-2010 Street and Utility Improvement Project that had not been addressed previously: - The existing storm sewer on Red Oak Drive from Ardan Avenue to approximately 225-feet south is recommended to be removed and be replaced with a larger diameter pipe. This recommendation has been incorporated into the final plan, and is shown on plan sheet C5.02-S included with this Staff Report. - The estimated construction cost of this storm sewer = $10,900