- 11 - the casing to a height approaching 50 feet from the surface of the ground. The final 50 feet of the well boring was filled with concrete around the 12-inch PVC casing in order to seal the well, and a pump was inserted into the casing. Other than the pump, which can be removed and replaced, the well has no moving parts. The average life of this type of well is approximately 30 years, but can be longer or shorter depending on the water quality and the existence of minerals in the vicinity that can plug the casing. A well can be maintained and cleaned to stem or remove the buildup of mineral deposits in the well casing. The cost of such procedures ranges from $800 to $1,500. The cost of petitioners’ new well was $11,426. Petitioners’ old well was destroyed on April 14, 1999, at a cost of $900. The destruction of the old well is accomplished by perforating the casing, filling it with a waterproof clay, and capping it. In General For Federal tax purposes, petitioners classified and consistently treated the trellis components, drip irrigation systems, and wells as equipment depreciable over 7 to 10 years for 1999 and 2000 and for all years before and after. Petitioners’ certified public accountant, who specializes in wine industry accounting and taxation, advised petitioners that he believed their method for depreciation of the trellising and drip irrigation systems to be correct. As grape growers and winePage: Previous 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 NextLast modified: November 10, 2007