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<br />9. REPAIR CONCRETE LINED SECTiONS WITH SHOTCRETE AND GROUT <br /> <br />All equipment, labor, and materials to repair approximately 72 lineal feet of existing concrete liner with shotcrete <br />and grout. The concrete liner occurs in two sections as follows: <br /> <br />Station 27+90to 28+35 <br />Station 29 + 27 to 29 + 54 <br /> <br />The work includes placing approximately 20 yards' of shotcrete and approximately 60 yards' of conventional <br />cement void grouting, including required hole drilling, extending approximately 5'above the concrete crown. <br /> <br />This item shall be paid for on the following basis: <br /> <br />A. Per cubic yard of shotcrete placed and accepted by the Engineer. This item will be measured by <br />taking the area covered multiplied by the 3" neat design thickness, <br /> <br />8. Conventional Void Grouting: <br /> <br />Per hook-up which shall be defined as making all connections to pumps and grout <br />mixers required to inject grout under a specified pressure into a particular grout hole <br />approved by the Engineer. <br /> <br />Per sack of cement injected into grout holes accepted by the Engineer. <br /> <br />10. EXCAVATE MUCK FROM BALD TUNNEL <br /> <br />All equipment, labor, and materials to excavate approximately 600 yards' of caved rock rubble, boulders, and <br />treated timbers from approximately 350 lineal feet of tunnel extending from approximately Station 49 + 70 to <br />Station 52 + 73. The rock materials will be hauled to the eastern portal and placed on the existing muck pile. <br />The timbers will be hauled to the portal and stockpiled for removal to a storage area by others. This item shall be <br />paid for on a per cubic yard basis for caved material excavated a\\d hauled to the portal and accepted by the <br />Engineer as measured by survey on muck pile. <br /> <br />t <br /> <br />11. EXCAVATE AND SUPPORT CAVED AREA <br /> <br />8. Install Steel Set Supports: Per tunnel lineal foot installed and accepted by the Engineer. <br /> <br />t <br />t <br />t <br />, <br />, <br />, <br />C <br />4 <br />4 <br />~ <br />~ <br />~ <br /> <br />All equipment, labor, and materials to mine through and support 60 lineal feet of caved tunnel from <br />approximately Station 52 + 73 to 53 + 33. The work includes drilling up to 240 lineal feet of probe holes to <br />assess rock conditions, furnishing and installing approximately 18 steel sets with all associated spiling, lagging, <br />clamps, foot blocks, tie rods, and excavating approximately 200 yards' of rock rubble, boulders, and treated <br />timbers. The rock materials will be hauled to the eastern portal and placed on the existing muck pile. The <br />timbers will be hauled to the portal and stockpiled for removal to the storage by others. <br /> <br />This item shall be paid for on the following basis: <br /> <br />A. Drilling Probe Holes: Per lineal foot accepted by the Engineer. <br /> <br />C. Excavate Caved Debris: Per cubic yard excavated and hauled to the tunnel portal for placement <br />or stockpiling and accepted by the Engineer. Cubic yards shall be measured by survey at the <br />portal muck pile. <br /> <br /> <br />Section 01025 . Page.. of 7 <br /> <br />10/00 <br />