The extraction of materials in the quarry "Áridos Sanz" generates new aquatic habitats, which create opportunities for colonization of different species, such as otters and water voles. Enhance the connectivity of water bodies between the gravel quarry and its surroundings could: 1) Increase the biodiversity at the local and regional scale and 2) help developing conservation strategies for these species in the medium and long term. Taking advantage of the benefits of the scenario, firstly the project addresses a georeferenced population study of aquatic mammals, such as otter and water vole. This study will be carried out using camera traps and droppings´ surveys in the quarry lagoon system, and in the irrigation canal and Duero River at different distances from the quarry. The population study also includes a genetic analysis of otter droppings. Then, in order to determine the connectivity of the territory and to develop habitat suitability models for the desired species, different spatial analysis of the populations and their interactions with environment features will be developed. The results of all these studies will be published in a scientific report and in a technical handbook on ecological restoration actions for improving the aquatic mammal’s habitat in gravel quarries and their surroundings. Finally, dissemination materials will be designed and disseminations events will be implemented.