Specifications include, but are not limited to: Remove and stockpile downstream embankment rock facing Excavate and stockpile a portion of the downstream Nichols Dam embankment Demolish an approximately 120-linear foot section of the existing 5-foot diameter concrete conduit Install a sand filter, drain gravel, toe drain system and measurement weir structure Reconstruct the dam embankment Replace dam embankment rock facing Remove the piping, valves and exhaust system from the inside of the inclined intake Concrete core 2 openings in the inclined intake, install 2 long flange spools and grout in place Demolish existing Stop Log and Bulkhead Structure at the base of the inclined intake Abandon 2 existing openings in the inclined intake Install 1-24-in on the inside of the inclined intake and 2-30-in hydraulically controlled knife gates on the outside of the inclined intake Reline the existing 5-foot inside diameter outlet conduit with a 28-inch outside diameter Standard Dimension Ratio (SDR) 15.5 high density polyethylene (HDPE) pipe and grout in place Construct a new section of concrete encased 28-inch SDR 15.5 .HDPE pipe from the relined portion downstream to the new valve vault Construct a concrete bulkhead at the base of the inclined intake Construct a concrete cast-in-place valve vault near the toe of the dam Install piping, valves with measuring devises and energy dissipation downstream from the relined conduit for Living River Flows, acequias flow requirements and emergency releases Connect the 28-in HDPE pipe to the existing 24-in Ductile Iron Pipe (DIP) in the access road Construct a concrete cast-in-place vault at the Canyon Road Water Treatment Plant (CRWTP) At the CRWTP, connect a new 24-in DIP to the existing 24-in DIP in the access road near the fence line to the vault Install plug valve, measuring device and bypass valving in the vault Connect the vault to the CRWTP with a 24-in DIP Provide a VSA pre-cast concrete building near the downstream crest of the dam Install Vacuum Swing Adsorption (VSA) equipment in the VSA pre-cast building Design, furnish and install hydraulic power unit (HPU) to operate the 24-in and 30-in knife gates in the VSA pre-cast vault Procure and install intake screens on inclined intake Install air compressor and accumulator and piping in VSA building for aeration and air sparge system Installation of six open standpipe piezometers Coordinate with City of Santa Fe delegated contractor for SCADA system integration, programing and supplying panels Coordinate with City of Santa Fe delegated contractor for Dam Monitoring instrumentation and programming. Install 3 Phase Power from left abutment of the dam to Nichols Valve Vault and VSA Building
