[3] The Angat Dam and Reservoir is also a major source of hydroelectricity for Metro Manila and surrounding provinces, contributing some 200 megawatts to the Luzon grid.

[8] On April 30, 1968, 6,600 hectares (16,000 acres) of land surrounding the Ipo Dam was declared as a separate forest range and watershed management pilot project reserve through Proclamation No.

[9] The Angat Watershed Forest Reserve is located approximately 35 kilometres (22 mi) northeast of Metro Manila largely in the mountainous eastern region of Bulacan.

It stretches downstream from the watershed into several municipalities and irrigates more than 30,000 hectares (74,000 acres) of prime agricultural lands before draining into the Pampanga River in Calumpit and eventually exiting into Manila Bay.

[4][13] Additional water supply is fed into the Angat reservoir through the Angat–Umiray trans-basin tunnel which runs for 13 kilometres (8.1 mi) from Umiray River on the eastern side of Sierra Madre in General Nakar.

[1] In December 2014, the National Power Corporation inaugurated the Angat Rainforest and Ecological Park within the reserve in Sitio Bitbit, San Lorenzo, Norzagaray.

[16] It offers many different opportunities for nature and outdoors enthusiasts including the hilltop view deck, ecological center, and the Tarictic fun trail.

A museum of natural history is also planned for the park, as well as a Dumagat cultural heritage site, seedling propagation, rattan gene bank and a bambusetum.

[1][2] It is home to 290 endemic species of woody and non-woody plants, including the white lauan (known locally as bagtikan), tanguile, yakal, acacia and narra.