The principal features of the work to be performed under this contract consist of pond dredging, weir repairs, plantings and shoreline stabilization. The Project goal is to restore the existing ponds at the Bailey Arboretum to their historic
condition. A considerable amount of fine grained organic sediments have accumulated over
time in the two (2) ponds. This sediment accumulation has reduced the pond's ability to: 1) act
as stormwater buffers; 2) provide suitable habitat for aquatic wildlife; and 3) provide high
aesthetic quality integral to the Arboretum.
C. A maximum of 5,000 cubic yards will be removed from the ponds. The removal of sediments
shall be conducted via hydraulic dredging and dewatering on site using geotubes (to be located
adjacent to the ponds in the Bailey Arboretum parking area) and disposal of the dredged
materials offsite at an approved disposal facility. Dewatering from the geotubes shall be
directed back into the ponds. The existing pond weirs can be utilized to provide flow control in
the ponds and to allow suspended solids to settle in the ponds and to not discharge downstream
and to the receiving waters. Project consists of Pond Dredging and Structural Repairs at the Bailey Arboretum Pond Dredging (Pond Material Removal)
a. Contractor shall provide for the re-grading and removal and proper off-site
transportation and disposal of pond material at the locations as indicated in the
Contract Documents, as specified herein and as directed by the Owner's
Representative. Off-site transportation and disposal of pond material shall be
outside the limits of the Project site and in accordance with local, state and federal
regulations. Contractor shall submit their proposed schedule and means and
methods to conduct same, including their proposed method(s) for removal of pond
material and any dewatering and bypassing activities, etc., if required. Contractor
may have the option to dispose of excavated material at Town of Brookhaven
Landfill in accordance with Section 02325.
2. Sediment and Erosion Control
a. Contractor shall provide for soil erosion and sediment control (i.e., temporary
gravel construction entrance/exit, energy dissipater, straw hay bales, silt fencing,
erosion control blankets, etc.), as necessary, as specified herein and as directed by
the Owner's Representative and prior to any site disturbances.
3. Structural Repairs
a. Provide for repairs to existing concrete spillways as indicated in the Contract
Documents, as specified herein.
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