Preliminary Cost Analysis for Floating Cover and Prefabricated Metal Building at HAWC Observatory

Feb 05, 2026

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This document presents a preliminary cost summary for a floating cover system designed for the HAWC Observatory. The floating cover is constructed from 60 mil/5 ply Hypalon fabric, capable of floating at a water depth of 2 meters. It includes curtains that are attached to buoyed tension cables, along with non-corrosive cables anchored to grade beams. The structure is designed for light-tight construction and features hatch ports for maintenance access. Additionally, it is robust enough to support personnel and includes an ROV for maintenance and servicing.

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Preliminary Cost Analysis for Floating Cover and Prefabricated Metal Building at HAWC Observatory

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HAWC OBSERVATORY • PRELIMINARY COST ANALYSIS • PRELIMINARY COST SUMMARY
PRE-FAB METAL BUILDING
FLOATING COVER
FLOATING COVER - BASIS • Quote from Layfield • Fabric is 60 mil/5 Ply Hypalon • Cover can be floated at 2m water depth • Curtains attached to the bouyed tension cables • Non-corrosive cables at 3m+/-attached to grade beams • Detailed to provide light-tight construction • Hatch ports for access & maintenance from topside • Rigid enough to support personnel • ROV available to support maintenance and servicing
LINED POND
COST SUMMARY