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PAGE 2 the water at that elevation. The only true way to determine the pump height and therefore the expected water elevation is to remove the pumping unit and take appropriate measurements. Mr. Tatum has not supplied any information pertaining to the pumping mechanism. Again, there is no historical information on this well or pump which would demonstrate that the water elevation has been affected. The windmill is currently disconnected from the pumping unit. It appears to have been disconnected since Mr. Tatum purchased the well which predates the vent shaft installation. The well survey conducted by WFC in 1984 shows the well as not functioning. This well has therefore, been non-usable for at least 10 years. With no attempt on Mr. Tatum's part to connect the well during his ownership, it is impossible to prove a degradation of the well. Another item to consider in this investigation is the efficiency and status of the well itself. Due to years of non-use, it is unlikely that the well is in peak condition. Without details as to the type of screen or perforations in the completed zone, the efficiency of the well can not be determined. The outer casing is steel pipe. Over the years, steel will rust and could cause restrictions in the perforations. These restrictions could cause a degradation of inflow into the well column. If the water level has dropped in the well, which has not been verified, it could be attributed to the disrepair and degradation of the casing or perforations and/or a reduced flow efficiency into the well. Years of non-flow will cause fine grained sediments to build up which may reduce the inflow capacity into the well. It is apparent by the increase in the water level over the past months that flow into the well is still present, but may be restricted. Basin Resources would like for you to consider all the above information in your determination as to adverse impact upon Mr. Tatum's windmill well by the vent shaft. A number of assumptions were made which are not correct. The potential adverse impact on the well must take into account all facts as they exist now. There is currently 43' of water in the well. The well does have inflow. There is no historical documentation or evidence to indicate pre- shaft water elevations. The productivity of the well prior to and after shaft construction has not been documented or proven. The well has been in a state of disrepair for at least 10 years with no evidence of use. Mr. Tatum has never used, repaired, or tested the well in order to verify his claims for detrimental affects of the shaft to his well.