[1] With the fall of the Roman Empire a lack of facility maintenance followed, which, most probably after the effects of a serious earthquake occurring in 508 AD,[2] favoured the clogging of the underground canal, with the resulting natural reflood of the Fucine basin where the waters were soon back to the levels prior to the first drainage.

The Claudian plan was resumed in an effective way starting from 1856, 18 centuries later, by Alessandro Torlonia who had the sections of the main emissary enlarged and further vents and inclined shafts built which served the above tunnels.

[1] In 1876, having achieved the second drainage which was officially declared with a document of 1 October 1878,[4] the Roman architect of the House of Torlonia, Carlo Nicola Carnevali, built the head of the emissary, a monumental work made up of the bridge of the sluice gates and the statue of the Immaculate Conception, situated in Borgo Incile south of Avezzano.

From the area of the cleaning works of the Roman inlet and the nearby areas connected to the Fucine territory, several items emerged: four reliefs, depicting scenes from the Fucine Lake and a Marsian town, some inscriptions on marble plaques reporting distance measures in feet, graffiti, some work materials such as a large bucket and an oil-lamp, as well as several archaeological items such as busts, epigraphs and cappuccina tombs.

[5] The chief site engineer, French Alessandro Brisse, chose the materials for the construction of the work, while architect Carlo Nicola Carnevali supervised the architectural plan, also building in 1876 the adjoining garden in addition to the monument of the emissary head.

The Fucine Inlet is a Neo-Classical style work built by using local stone blocks for the main body of the building, carved out of the quarries that were located in the mountainous territory of Capistrello.