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U <br /> The total Yearly Average Cost of $61,160.59 includes power charges which are <br /> necessary to pump flows both before and after development of the upland basin. The Hillside <br /> Basin is responsible for 56% of this total yearly average cost or $34,249.93. Since the CITY <br /> is responsible for 23% of Hillside Basin flows and sediment loads, the CITY is responsible for <br /> 23% of this figure or $7,877.48. (Another way of expressing this same calculation is to <br /> multiply the Hillside Basin current total runoff of 56% by the CITY's 23% share to arrive at the <br /> CITY's share of total yearly average cost as 12.88% resulting in a figure of $7,877.48.) <br /> 3. Pump Plant Maintenance Costs <br /> For the past five years, pump plant maintenance costs have been as follows: <br /> Year Cost Running Total Yearly Average Cost <br /> a. 2006 34,621.01 34,621.01 <br /> b. 2005 6,861.58 41,482.59 <br /> c. 2004 67,229.82 108,712.41 <br /> d. 2003 12,839.15 121,551.56 <br /> e. 2002 40,760.01 162,311.57 = 5 = $ 32,462.31 <br /> The total yearly average cost of$32,462.31 includes maintenance for pumping flows both <br /> before and after development of the upland. The Hillside Basin is responsible for 56% of the <br /> total cost of runoff or $18,178.90. Since the CITY is responsible for 23% of Hillside Basin <br /> flows, the CITY is responsible for 23% of this figure or $4,181.15. (Another way of expressing <br /> this same calculation is to multiply the Hillside Basin current total runoff proportion of 56% by <br /> the CITY's 23% share to arrive at the CITY's share of total yearly average cost as 12.88%, <br /> resulting in a figure of $4,181.15.) <br /> 4. Pump Plant Replacement Costs <br /> Marshland pumping facilities have aged and a replacement program was implemented. <br /> Aqua Terra's study for the COUNTY indicated that all six pumps were in need of replacement, <br /> at a cost of about $50,000 per pump at the time of that 1994 Study which was adjusted by a <br /> $1,000 per year increase to reflect increased costs over a six year period beginning in 1999. <br /> Reconstruction or replacement of aging pumps is necessary because of pumping flows both <br /> before and after development of the upland. The Hillside Basin is responsible for 56% of the <br /> total runoff and, therefore, 56% of replacement cost. Since the CITY is responsible for 23% <br /> of Hillside Basin flows, the CITY is responsible for 23% of this 56% figure or 12.88%. An <br /> amortization table for a replacement calculation is set forth below and was completed in 2005. <br /> APPENDIX TO INTERGOVERNMENTAL AGREEMENT FOR <br /> ACCOMMODATING SURFACE WATER IN THE MARSHLAND <br /> FLOOD CONTROL DISTRICT BY AND BETWEEN THE CITY OF <br /> EVERETT AND MARSHLAND FLOOD CONTROL DISTRICT - PAGE 4 <br />