Tell City Dam Maintenance

Special Project Specifications Dam Mowing and Dam Maintenance Dam Maintenance Specifications Description This work consists of mowing of the dams, spillways, and other designated areas; debris removal; cutting of trees, shrubs, and other woody material on or adjacent to the dam, dam structures, fences, and/or concrete structures. The placement of warning signs and mobilization is also included in this work. Work shall be done by mechanical means or by hand treatment. 1. Mechanical Means. Furnish qualified operators and equipment used for: a. Mowing grasses, shrubs, brush, and small trees. i. Basic equipment 1. Tractor and/or skid steer 2. Mowing (bush hog) attachments b. Cutting or grinding of large trees and shrubs that cannot be cut or accessed with normal mowing equipment. i. Specialized equipment 1. Tractor with side boom mower attachment 2. Track excavator with brush cutter attachment. c. Debris removal along the dam structure, inlet and outlet structures. i. Basic equipment 1. Tractor and/or skid steer 2. Mini-Excavator 2. Hand Treatment. Furnish qualified personnel and equipment to treat vegetation and debris: a. Areas that are inaccessible to mechanical equipment i. Riprapped areas ii. Soft, muddy, or wet areas iii. Ditched areas iv. Hillsides b. Around and under benches, signs, etc. c. Along, under and around fences d. Along concrete and other manmade structures e. Tree cutting and removal f. Assisting in debris removal g. Basic equipment i. Weed eaters, ii. Brush cutters, iii. Chainsaw, iv. Rakes -- 1 of 4 -- Special Project Specifications Dam Mowing and Dam Maintenance Requirements Routine Dam Maintenance Treatment Method. a) Mowing. This work will consist of cutting the vegetation on the dam faces, areas below the dam, spillway(s), and other areas shown on drawings or attachments. Grass, brush, shrubs, and small diameter trees shall be cut to a height no higher than six (6) inches. Mowing shall be done by mechanical means, normally with a tractor and bushhog, or by hand. The mowing operation should be done in a manner to not create berms, piles and/or wind-roles of cut material that could damage the vegetation in or around the treatment area. b) Hand Treatment. Trees that fall within the mowing areas and are too large to be mowed shall be cut flush with the ground by hand and removed. Vegetation along fences, signs, benches, concrete and other manmade structures shall be cut to a height not to exceed 4” in height. Treatment Area. Routine dam maintenance treatment area is from the edge of the water or top of the riprap, on the upstream side, to the toe of the dam on the downstream side, spillways, and adjacent mowed areas. Spillways will be mowed across their full width and length including all berms and 10’ above the spillway floor on the uphill side, unless otherwise shown or directed. The mowed areas below or adjacent to the dam shall also be treated to their current full widths and lengths. An area with riprap or smaller stone that is accessible with a tractor or skid steer with a mower is included as part of the mowing area when shown on the exhibits. Some areas may be extremely wet in the spring and may require hand treatment to prevent rutting and vegetation damage. Debris Treatment. Logs, trash, tires, and other debris that are deposited on the upstream face of the dam or in the spillway(s) during high water events are to be removed. Remove logs, trash, and other debris off of, within, and around the inlet structure. Constructed fire rings, within the treatment area, made of rocks or other material shall be disassembled with rocky material placed in riprap areas. Trees along the edge of the mowed areas that have come down and are partially or wholly within the maintenance area are to be removed. Cans, tires, glass and other non-woody material, excluding rocks, shall be disposed of off National Forest lands. Debris shall be treated as described in the Disposal Section and as shown on the Drawings, the Description of Work, or as directed by the Forest Service. Disposal Methods Woody material shall be disposed of by one or more of the following disposal methods as shown on the Drawings, Description of Work, or as directed by the Forest Service. Hazardous materials, tires, metal, aluminum, plastics, and other non-woody materials shall be disposed of off National Forest lands. Dispose of materials as shown below: a) Piling. Pile woody debris in areas designated on the drawings, staked on the ground, or designated by the Forest Service. Material shall not be piled against standing timber, placed on the dam, or within the spillway, and shall not exceed a height of ten (10) feet. b) Chipping. Chip woody material in area(s) designated by the FS or as shown on the drawings. Chips shall be spread evenly over the area with a thickness not to exceed four (4) inches. c) Scattering. Scatter trees and other woody material outside the mowed areas. -- 2 of 4 -- Special Project Specifications Dam Mowing and Dam Maintenance d) Remove from project. Dispose of material legally off the project area. Furnish a statement documenting the nature and quantity of material processed or sold for recycling. Otherwise, furnish a signed copy of the disposal agreement before disposal begins. e) Bury. Bury debris in trenches or pits in areas designated by the Forest Service. Tires and hazardous material shall not be buried. f) Hazardous material and tires. Furnish a copy of all disposal permits. Dispose of material off National Forest land and according to Federal, State, and local regulations. Seeding and Mulching Areas in which the ground has been disturbed and bare soil is present shall be seeded and mulched to re- establish ground cover. Fertilizer is not required unless shown on the Plans or stated in the Description of Work. Seed shall be Kentucky 31 fescue or equivalent while mulch shall be weed free. Do not seed or mulch during windy weather or when the ground is excessively wet, frozen, snow…