La presa de Muel (Zaragoza) es una gran obra de ingeniería hidráulica realizada sobre el río Huerva, pequeño afluente del Ebro por su margen derecha. Situada a 30 km de la antigua Caesaraugusta (Zaragoza), su construcción se vincula con el abastecimiento de la colonia y el regadío de su territorio. Conocido desde antiguo, el gran dique de Muel ha sido redescubierto para el mundo de la Arqueología gracias a los trabajos que un equipo multidisciplinar de la Universidad de Zaragoza vienen realizando en el mismo desde 2009. Estos estudios han permitido conocer mejor las características del monumento, la cantera de la que surgió la piedra necesaria para su construcción y una serie de marcas epigráficas de gran interés. En este trabajo se presentan 31 marcas lapidarias descubiertas en el paramento aguas abajo de la presa hasta el mes de septiembre del año 2016.

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The Monforte de Moyuela dam, also known as Ermita de la Virgen del Pilar dam, is a Roman reservoir built on a tributary of the Aguasvivas River (Ebro basin, Spain).A multidisciplinary study has been carried out to investigate this kind of Roman water infrastructure. It is the fifth-highest dam (16.8 m) in the Iberian Peninsula and the seventh in the Roman Empire. The initial dam was built ca. 100 B.C.-10 A.D., probably in the period of Augustus, like other nearby Roman dams. It was quickly filled due to the extreme and generalized anthropic degradation in the basin during the Roman period. During the mid-2nd century, the wall was increased in height and its final silting was dated to the early 7th century. The study of the opus caementicium mortars shows constructive differences between the initial and subsequent phases of the wall. These mortars provided charcoal for dating the two phases. In addition, the stratigraphic and edaphological study of the reservoir's sedimentary fill, together with the 14 C ages, allowed us to reconstruct the two main activity cycles and the final siltation of the dam.Subsequently, the dam broke in two phases, which created the two stepped sections located on the current valley bottom. The data obtained allowed the creation of a geomorphological map and an evolutionary model of the valley showing the main differentiated stages, from the initial construction of the dam to its final opening. Although some remains of canals downstream of the dam have been identified, the use of this dam, which remained active for several centuries, still needs to be investigated in greater detail.

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