Not yet in existence fifty years ago, the Port Marianne neighborhood is today experiencing rapid growth and expansion. The task of the landscape master plan begun in 1991 is to strengthen the neighborhood's diffuse and fragile plant structure.

The previous property holdings divided up the landscape into scattered segments of alignments, which were the remains of agricultural farming, and into groves. The project seeks to conserve and highlight this specific vocabulary of masses and lines, avoiding the introduction of an interconnecting spatial network from nowhere, with no relation to the actual situation, resembling that present in the development of many new cities.

The landscape of the neighborhood is as of now marked out in two directions. Separated alignments of broadleaved trees highlight the lines running east to west. Pine groves in the more undefined territories of the small valleys and rivers form vast outlines from north to south, and allow for the assimilation of the existing flora into the overall landscape. Meanwhile, avenues of plane, linden, and hackberry trees bring their own more specifically urban connotation.

Three large areas were taken into consideration during the design phase. Pierre Mendès-France Avenue, which corresponds to the main entranceway to the city; the park along the Lenz river in the Richter ZAC (urban development zone); and the C10 central roadway. The planning of Charpak Park allowed for the rapid completion of a retention basin to help better control and contain the rises in the water of the two rivers, the Lironde and the Lez, crossing the area.

This plan was the subject of an international consultation, and was appended to the official land use guidelines (plan d'occupation des sols or POS in France).