Specifications include, but are not limited to: he Maryland Department of the Environment, Mining Program, Abandoned Mine Land Division (AMLD), is requesting Price Bids from qualified contractors to provide equipment, materials and manpower for maintaining water treatment systems, maintaining pipes and ditch systems, modification and removal of water treatment system and other work related to the treatment of acid mine drainage in the coal mining region in Western Maryland. The actual work duties performed will be outlined by the Abandoned Mine Land Division (AMLD) as the need for services arises and will be based on the particular project assigned. The contractor shall provide listed equipment, including an experienced operator, to perform work related to acid mine drainage treatment. Equipment may be needed to perform duties such as welding, tree cutting, metal cutting and plumbing. The Contractor will be required to provide equipment, operators, labor and materials as needed to perform, but not limited to, the following types of work: 1 Modifications to existing acid mine drainage treatment structures which may include enlarging ponds, sealing leaks in treatment ponds, adding limestone, steel slag and/or compost to AMD treatment systems, or modification of piping systems. 2. Pumping water from water treatment ponds, sumps and leach beds. Removing sediments from treatment ponds and ditches. 3 Earthwork, including excavation, backfilling and/or regrading, installation of surface water diversion structures, water treatment and dewatering practices, and construction of subsurface drain and underdrain systems. 4 Removal of water treatment systems, including, pond dewatering, pond backfilling, and demolition and removal of outfall structures. 5 Removal of sediment and erosion control devices associated with mine water treatment construction, including traps, basins, earthen dikes, ditches, silt fence, and any other devices constructed for sediment control. 6. Revegetation of newly disturbed areas resulting from completion of other work. The work will include the furnishing and application of soil amendments, preparation of seed bed, seeding, and mulching in accordance with the rates and methodology as detailed herein. 7. Other tasks as determined by AMLD.