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PROJECT DESIGN CHANGES <br />The project was completed with only minor design changes, none of which <br />impacted the pipeline capacity or operation. <br />Discharge Vault: The Discharge Vault was moved about 15 feet south of the original <br />location in order to increase spacing from existing mine water lines. <br />24inch Storke Pipeline Alignment: The 24inch HDPE Storke pipeline alignment was <br />adjusted slightly, moving closer to the up-hill side of the bench it was installed on. This <br />allowed better access around the line for the Contractor's equipment. The alignment <br />was also adjusted slightly near the PT to avoid interference with concrete footings. <br />Storke Portal Culvert: The Storke Portal Culvert was re-aligned in the field per the <br />Contractor's request. This was done to move the culvert pipe away from some of the <br />other construction activity. The discharge of the culvert still reports to the-same area as <br />designed. <br />Connection to Existing Discharge Line:-...The connection to the existing, discharge <br />pipeline was made at-the--same- general, location as the original design, but it was <br />' decided to change the connection from a tee to a 90-degree elbow. This allawed_the old,.::. ;:, ,., <br />' --- .-discharge vault to tie. filled with-eenerete and abandoned. This prevents any-possibility <br />of mine water entering the old, abandoned mine water discharge line. <br />' Mill Building Sewer Line: A previously unknown sewer line connected to the old <br />discharge vault. Since this vault was abandoned, it was necessary to re-route it into the <br />' new Discharge Vault. A section of 6-inch HDPE pipe was used for this purpose. <br />' Ultrasonic Testing: Ultrasonic testing of the HDPE pipeline fusion welds was requested <br />part way through the project. All of the accessible joints were tested by an independent . <br />' testing firm and found to be well made. <br />9 <br />