Attachment D Dam Maint Specifications.pdf

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

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.

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 covered, extremely dry, cloddy, hard pan, or not friable. Seed and mulch are to be applied using a dry method which can be accomplished by hand or mechanical means. Mulch shall be applied within 48 hours after seeding.

Public Safety

This work consists of protecting the public by placing temporary warning signs adjacent to and within the project area. Trails within the treatment area shall be signed on all access points to warn users of work in progress. Furnish and install warning signs before the start of maintenance work. Signs shall be black lettering on an orange background and shall be a minimum size of 24”x24”.

Protection of Personnel, Property and Landscape.

Perform all operations in a prudent, conscientious, safe, and professional manner. Ensure that all personnel involved in dam maintenance are trained for the level of expertise required for the proper performance of the task in the areas of chemical incompatibility, general first aid procedures, and spills.

Provide personal protective equipment appropriate to the task and to ensure safe handling of hazardous materials. Notify the Forest Service of all hazardous material that may be brought onto or found on the

National Forest.

The Contractor is solely responsible for all spills or leaks that occur during the performance of this contract. Spills or leaks shall be cleaned up to the satisfaction of the Forest Service and in a manner that complies with Federal, state, and local laws and regulations.

Protect existing facilities, features, signs, markers, structures, vegetation, and improvements. Damage to any or all shall be repaired at contractor’s expense.

Do not disturb the area(s) beyond the treatment area unless otherwise shown on the Drawings or directed by the Forest Service.

Do not excavate, remove, damage, alter, or deface any archeological or paleontological remains or specimens. Control the actions of employees and subcontractors on the project to ensure that protected sites are not disturbed or damaged. Should any of these items be encountered, suspend operations at the discovery site and notify the CO. Operations can continue in other areas of the project away from the discovery site. The CO will inform the Contractor when operations may resume at the discovery site.

Mobilization

Mobilization consists of moving personnel, equipment, material, and incidentals to the project and performing all work necessary before beginning work at the project site. Mobilization includes the obtaining of permits, insurance, and bonds.

All equipment and trailers shall be “washed” with all mud, debris, weeds, grasses, and seeds removed prior to being allowed on the project. The Forest Service shall inspect all equipment prior to being unloaded off the transport vehicle.

Mower decks and equipment shall be cleaned of grasses, weeds, and seeds prior to leaving each dam area and moving to another. This process can be completed by manual cleaning, using air form a compressor or leaf blowers.

The Contractor shall give the Forest Service a minimum of 48-hour notice prior to beginning any work.

Measurement

Measure the Dam Maintenance items listed in the bid schedule according to the following

Routine Dam Maintenance will be measured by the acre as shown in the Schedule of Items.

Non-routine Maintenance will be measured by the acre, each, or lump sum as shown in the Schedule of

Items.

Payment

The accepted quantities measured will be paid at the contract price per unit of measurement listed in the

Schedule of Items. Payment will be full compensation for the work completed that meets all specified requirements shown.

No payment or additional payment will be made for work not completed, that does not meet specified requirements, or for any rework.

Mobilization is considered an indirect cost of this contract and will not be compensated as a separate work item.