Inside the water facilities compound.

A stone monument topped with a large stone cross, standing on a rectangular pedestal. At its base are three plaques written in English, Filipino, and Japanese, each carrying the same dedication to honor the Filipino, American, and Japanese soldiers who perished in the Battle of Ipo Dam in 1945.

In the final months of World War II, one of the most vital battles in the Philippines was not for a city, but for water. Manila had been liberated in early 1945, but the capitals survival depended on the reservoirs upstream in Bulacan. Among these, Ipo Dam was the last stronghold still in Japanese hands. 

In May 1945, the U.S. 43rd Infantry Division and Filipino guerrillas launched a fierce assault on Japanese positions in the Sierra Madre to capture Ipo Dam, Manilas vital water source. After days of heavy fighting, they seized Four-Corner Hill on May 12, and by May 17 raised the American flag over the powerhouse, forcing the Japanese to surrender and securing the capitals water supply.

Source of information: en.wikipedia.org, warfarehistorynetwork.com

Source of photo: philippine-sailor.net

WITH HONOR AND RESPECT
THIS MONUMENT IS DEDICATED
TO ALL FILIPINOS AMERICANS
AND JAPANESE SOLDIERS WHO
GAVE THEIR LIVES IN THE BATTLE
OF IPO DAM IN THE YEAR 1945