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The Large Synoptic Survey Telescope (LSST) is a wide-field, ground-based telescope, designed to  image a substantial fraction of the sky in six optical bands every few nights. It is planned to operate  for a decade, starting in 2021, allowing the stacked images to detect galaxies to redshifts well beyond unity.   The LSST is designed to achieve a very broad science roadmap, that can be articulated around four major science themes :  \begin{itemize}  \item Probing Dark Energy and Dark Matter  \item Taking an inventory of the Solar system  \item Exploring the transient optical sky  \item Mapping the Milky Way  \end{itemize}  This document outlines the current work plan that the LSST team at LUPM is putting forward to officially join the LSST project and efficiently start their scientific and technical activities. It is intended to serve as a support to the Scientific Council of LUPM, in preparation to the review on October 2-3 2014.   In the first part of the document, we summarize the LSST project, the dark energy science collaboration, and the LSST-France activities. The second part shortly introduces the LUPM team, and we devote the third section to a presentation of the LSST project and activities at LUPM.