Whether it's heavy rains or times of drought, attention is given to the level of water in a number of water reservoirs in the country, which are mostly located in the island of Luzon. One of these reservoirs, which are massive engineering feats of the 20th century, is the Angat Dam in the province of Bulacan, which supplies water for irrigation in the Central Luzon province and adjacent Pampanga and for domestic use in Metro Manila.

A common misconception is that this dam is in the town of Angat as its name suggests, but it is geographically and politically located within the town of Norzagaray. The dam was built in the 1960s at the upper portion of the Angat River, hence the name.

Apart from the Angat Dam, Norzagaray has another dam called Ipo, located downstream from the former. The present Ipo Dam was completed in 1984 but the old one which was replaced by the current one was completed in 1938 and was the site of the Battle of Ipo Dam in 1945.

Historic battles

In that battle, the dam was taken by the Filipino and American forces from members of the Shimbu group of the Japanese army commanded by General Shizuo Yokohama, which had control of the important water supply installations for Manila and its environs.

Half a century prior, the town also had its share of history during the battles for Philippine independence. In the Philippine Revolution against Spain, a local unit of the Filipino revolutionaries was organized by Sinfroso de la Cruz and made the Pinagrealan Cave in the village of Minuyan as their hideout and secret meeting place. His group was involved in battles against the Spanish forces in Norzagaray, Angat and San Jose in 1896 to 1897.

Now, the said cave is a tourist destination in the town together with other natural and cultural sites.

These pieces in Norzagaray's history are discussed in the recently released book, Casaysayan ng Norzagaray Año 1860, by Bulacan historian and cultural advocate Jaime Salvador Corpuz.