## 3 Results
### New Values and New Uses  
Water supply systems often maintain the utilitarian function for which they were created, subject to ongoing transformations and extensions in order to cover the growing demand for water by the urban population. However, as [PERSON] claimed, changes for multiple uses over time are a typical feature of large public works that often far exceed the expectations of their creators [57] (p. 27). In this way, some of the components of Canal de Isabel II are no longer used as originally intended and yet, at the same time, have acquired new uses and values, remaining part of the overall system (Table 3). Figure 9: Canal de Isabel II as a whole system. Source: Created by the authors. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Type** & **Number** & **Name** & **Year** & **In Service** & **New Use** \\ \hline \hline \multirow{2}{*}{Aqueducts} & 1 & Cuevas & 1852 & Yes & \\  & 2 & La Aldehuela & 1852 & Yes & \\  & 3 & Espralt & 1852 & Yes & \\  & 4 & Bajda & 1852 & Yes & \\  & & Morenillo & 1852 & Yes & \\  & 5 & Regachuelo & 1855 & Yes & \\  & 6 & de la Cerca & 1855 & Yes & \\  & & de Gavino & & \\  & 7 & Fuente del & 1855 & Yes & \\  & 7 & Palo & 1855 & Yes & \\  & 8 & Valmayor & 1855 & Yes & \\  & 9 & Barbotoso & 1855 & Yes & \\  & 10 & Navalperal & 1855 & Yes & \\  & 11 & Retuerta & 1855 & Yes & \\  & 12 & Sima & 1855 & Yes & \\  & 13 & Valaliente & 1855 & Yes & \\  & 14 & Colmenarejo & 1855 & Yes & \\  & 15 & Cabeza-Cana & 1855 & Yes & \\  & 16 & Mojapán & 1855 & Yes & \\  & 17 & El Cerrillo & 1855 & Yes & \\  & 18 & La Parrilla & 1855 & Yes & \\  & 19 & Valdealeas & 1858 & Yes & \\  & 20 & Fuente & 1858 & Yes & \\  & 21 & Vallegrande & & & \\  & 22 & O Valdelatas & 1858 & Yes & \\  & 23 & Valdeperales & 1858 & Disappeared & \\  & 24 & Los Pinos & 1858 & Yes & Yes \\  & 25 & La Traviesa & 1858 & Yes & \\  & 26 & Valdeacederas & 1858 & Yes & \\  & 27 & Los & 1858 & Yes & \\  & 28 & La Huerta & 1858 & Yes & \\  & & del Obispo & & & \\  & 29 & Amaniel & 1858 & Yes & \\  & & s1 & La Malacuera & 1858 & Yes & \\  & & s2 & Los Yesos & 1858 & Yes & \\  & & s3 & El Morenillo & 1858 & Yes & \\  & & s4 & Guadalix & 1858 & Yes & \\  & & El Bodonal, & & & \\  & & & Viruelas & 1858 & Yes & \\ \multirow{2}{*}{Tanks} & 1 & First buried & 1858– & & \\  & & tank & 1894 & No & Archive, exhibitions \\  & 2 & Second & 1879 & Yes & Park \\  & & buried tank & & & \\  & & 3 & Third buried & & \\  & & tank & 1915 & Yes & Park \\  & & 4 & First elevated & 1912– & No & Exhibitions \\  & & tank & 1952 & & \\ \multirow{2}{*}{Dams} & 1 & Ponton de la & & & \\  & 2 & Oliva & 1858 & No & Landmark \\  & & 2 & Navarejos & 1859 & Yes & \\  & 3 & El Villar & 1882 & Yes & \\  & 4 & La Parra & 1904 & Yes & \\  & 5 & Puentes & 1929 & Yes & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Heritage elements of the canal, types and original and current uses. Note the correspondence with Figure 9.  
* Ponton de la Oliva dam. Although it no longer performs the function for which it was built, the dam remains standing and is part of the historic heritage of the Ayllon mountain range. The mountain wall on the left bank of the dam is used by climbing enthusiasts. The dam is also part of a popular trekking route. * Recreational area at Risoequillo. Located on the right bank of the Risoequillo reservoir is one of the largest swimming pools in the Madrid region, with a capacity of more than 2000 people. It is operated by the town hall of Buitrago de Lozoya. * Cervera Marina. Located on the El Atazar reservoir, this recreational area is the only nautical base in the region of Madrid. It is home to an adapted sailing school, and people can practice windsurfing and rowing, as well as rent berths. * First underground tank at Campo de Guardias (1858). It was converted into an archive (1990) and then provisionally into an exhibition hall (2001). * Second tank, or the first water tower in Santa Engracia (1907) with a capacity of 1500 m\({}^{3}\).