2014-10-07_GENERAL DOCUMENTS - M1981184

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Measurement and Payment There will be no measurement for payment. Payment for this task shall be for the lump sum bid price under Item 2.0 of the Bid Schedule. This lump sum bid will cover all costs for developing and implementing the SHEAP, including writing and revising the plan as required, provisions and maintenance of safety equipment and personnel, conduct of daily safety meetings, and all other items necessary and incidental to fulfilling the requirements of this task and of the SHEAP. Payment will be made after approval from the PROJECT MANAGER. Payment for this task will be made only on the final invoice (before retainage). ITEM 3.0 MINE PORTAL CLOSURES The site contains three portals on the Mill, Gold Run and River Levels. All portals are currently closed and locked but will be modified to allow bat access and prevent unauthorized access by the public. Existing locks will be removed and relocked with locks provided by the Division of Reclamation, Mining and Safety. At all portals any pipes, water lines, etc. leading in or out of the portal are to be removed. The materials cost for modifying the closures shall be included in the bid price for Task 3.0. Mill Level Closure: The mill level adit is currently closed with an approximately two (2") inch bar stock gate fitted with an external frame, and locked with a chain and padlock. Spaces between the gate frame and the walls on either side of the adit currently allow for unauthorized access. Modified specifications from the IMRP General Bid Specifications, 2009 Section thirteen, Standard Drawing six will be used to incorporate the designs of the adit door closure and the bat closure bar stock crossbar alternative with improved DRMS safety requirements. Using number six (#6) rebar 1/4" anchored eight inches (8") minimum into competent rock and welded to the existing gate frame from the adit floor to the ceiling with six inch (6") on-center spacing. Grating measuring one and one quarter inches by one sixteenth inch (1 '/4"X 1/16") will be cut to fit between the existing frame and the competent rock perimeter of the opening, tack welded every other bearing bar to grate frame inside, allowing no access. The bar stock crossbar alternative bat closure has been modified by DRMS for improved safety (Figure 1). Using the existing door, vertical spacers from the bottom of the door to a height of thirty six inches (36") will be installed so no opening below thirty six inches (36") will have openings larger than 6" X 12". Above 36" the specifications from the IMRP General Bid Specifications 2009, Section thirteen, Standard Drawing six will be used. Existing private lock will be removed by CONTRACTOR and lockbox from bar stock crossbar alternative specifications from IMRP General Bid Specifications 2009, Section thirteen (13), Standard Drawing six (6) will be installed and locked with DRMS supplied locks. Gold Run Level Closure: The gold run level adit is currently closed with two (2) center opening 1/8" steel sheet doors and locked with padlock. The steel plating does not allow bat access. Modified specifications from the bat closure bar stock crossbar alternative IMRP General Bid Specifications 2009 Section thirteen, Standard Drawing six will be retrofit into the existing doors. Existing doors will have a centered twenty four inch wide by fifty nine inch (24" X 59") opening cut allowing for doors to swing with existing rail lines in place. Using two (2") pipe stock, support frames and the bat grates will be installed in both doors with improved DRMS safety modifications with vertical spacers installed on the bottom thirty six inch (36") of the gate to allow no opening to exceed six by twelve inches (6" X 12"). Existing locks will be removed by contractor and doors will be fit with modified lock box centered on doors and DRMS supplied locks to lock doors together. Mine carts currently on rail line will be pushed into adit prior to final closure. 9