The Leadville Sanitation District (District, Owner) is soliciting proposals for selection of a Construction Manager at Risk (CMAR) firm for the Wastewater Treatment Plant (WWTP) Improvements Project. All necessary labor, supervision, equipment, tools and materials to furnish, install and construct improvements associated with the headworks, aeration basins, clarifiers, return activated sludge (RAS)/waste activated sludge (WAS)/scum systems, solids handling and disinfection at the Leadville Sanitation District Wastewater Treatment Plant. The Leadville Sanitation District WWTP Improvements Project includes, but is not limited to: replacement of HVAC system, grit classifier, grit pumps and septage pump, and addition of new ultrasonic flow sensors in the headworks building; rehabilitation of existing concrete liner and replacement of aeration/mixing equipment, installation of a synthetic liner, and new blowers for the existing aeration basins; replacement of fiberglass enclosure at Clarifier No. 1 and replacement of Clarifier No. 2 mechanism and enclosure; replacement of RAS, WAS and scum pumps and associated piping and valves; replacement of existing aerobic digester air supply, aeration and mixing equipment, digester feed and transfer piping and pumps, and dewatering feed pump in the digester building; addition of a Rotary Drum Thickener (RDT) in a new RDT building, addition of new RDT feed/sludge transfer pumps, in-line grinder, and associated valves and piping in the digester building; replacement of belt filter press and conveyor with screw press and cake pump in the dewatering building; replacement of chlorine gas disinfection system with gravity flow, open channel ultraviolet (UV) disinfection system; construction of new blower building and UV building; and all ancillary equipment, site piping, process piping and appurtenances. Work to include all associated site work related to the project including but not limited to demolition, grading, paving and seeding. In addition, work shall include installation of electrical conduit and wiring, new electrical service, power/light panels, motor control centers, programmable logic controllers and controls and integration. The Owner reserves the right to reject any or all Proposals, to waive any informality or technicality, and to accept any Proposal which it deems advantageous. All Proposals shall remain subject to acceptance for 60 days after the Notice of Award(s).