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points of intersection with adjacent pipelines by using "pot holes" to physically expose the pipe. Pot holes will be hand excavated or dug with a vacuum truck ' capable of exposing the pipe. Vacuum trucks have been used primarily in cleaning manholes for sewer systems but have also proven effective in locating pipelines. ' • Washes and Intermittent Streams Crossings: Numerous crossings of dry washes and intermittent stream channels will be trenched using backhoe equipment, where practical. Additional TUAs up to 1 acre in size will be required in these areas. If necessary, the banks of larger channels will be ' excavated to create a slope gentle enough to allow equipment to progress to the Eloor of the wash. Soil will be stockpiled at the top of the banks of the channel. After the pipe is installed, the soil will be used to restore the banks of the channel ' to a stable configuration. • Perennial Stream and Irrigation Ditch Crossings: Proposed perennial ' stream crossing locations include Piceance Creek (two locations), Stewart Gulch (two locations), and Parachute Creel. (two locations). There will also be a small wetland crossing in Middle Fork Stewart Gulch. There will be no "river" crossings for this project. All of the proposed stream crossings would be completed by open-cut ' construction using a backhoe, although conventional bore is also a possibility. It is not anticipated that horizontal directional drilling would be used for any of the ' stream crossings. Water diversion techniques for stream crossings will be either ponding or temporary diversion. Each water diversion decision will be made based on the flow conditions at the time of construction. ' All irrigation ditches will be crossed via the open-cut method. If at all possible, irrigation ditch crossings would be scheduled for times when the ditches are dry. Otherwise, water flow would be maintained at all times unless arrangements are made with the affected parties to curtail flows. • Road Crossings: In order to avoid disrupting normal traffic patterns, ' pipeline crossings of county roads and other paved roads would be completed by boring. The boring method requires an additional TUA on either side of the bore for work space and soil storage. The largest bore pits would be excavated at three ' county road crossings (two on Rio Blanco County Road 5 and one on Garfield County Road 215), and these would have maximum dimensions of 8 feet deep, 20 feet wide, and 50 feet long. Pits would be sloped back to OSHA requirements ' for safety and to allow equipment to enter and exit the pit. The pipeline would be installed at these locations using either a wet bore ("slick bore") or a dry bore, ' as described below. Minimum burial depth for road crossings is 48 inches. PipeWe Womunon Summary 1 / Yankee GWch Sadmm Minerals Pm~ect American Soda, LL.P.