Inside the water facilities compound.

A rectangular black marker with a raised border and embossed white-painted text topped by the institutes seal, commemorating the joint efforts of American and Filipino troops with guerrilla fighters in seizing the dam from Japanese forces. The inscription, written in Filipino, was placed by the National Historical Institute on May 19, 2005.

Source of photo: commons.wikimedia.org

LABANAN SA IPO DAM

ANG IPO DAM AT ANG MGA DAAN PATUNGO RITO AY KONTROLADO NG PWERSANG HAPON SA ILALIM NI MEDYOR HENERAL OSAMU KAWASHIMA NA KABILANG SA PANGKAT NG SHIMBU NI TENYENTE HENERAL SHIZUO YOKOYAMA NOONG MGA UNANG BAHAGI NG TAONG 1945. IPINADALA ANG PINAGSAMANG PWERSA NG MGA PILIPINO AT MGA AMERIKANO NA KINABIBILANGAN NG IKA-169, 103, 133 AT IKA-172 REHIMYENTONG IMPANTERIYA NG HUKBONG AMERIKANO KASAMA ANG PANGKAT NG MGA GERILYANG MARKING, RAMSEY AT HUNTERS ROTC, UPANG BAWIIN ANG IPO, 6 MAYO 1945. TUMAGAL NG MAY LIMANG ARAW ANG MADUGONG LABANAN NA TINAMPUKAN NG MATINDING PAMBOBOMBA. NABAWI NG MGA GERILYANG MARKING NA NAGWAGAYWAY NG BANDILANG AMERIKANO SA TUKTOK NG PLANTA NG KURYENTE SA BAHAGING TIMOG, IKA-10:30 NG UMAGA, 17 MAYO 1945.

In English translation:

 BATTLE OF IPO DAM

THE IPO DAM AND THE ROADS LEADING TO IT WERE CONTROLLED BY JAPANESE FORCES UNDER MAJOR GENERAL OSAMU KAWASHIMA, PART OF THE SHIMBU GROUP LED BY LIEUTENANT GENERAL SHIZUO YOKOYAMA IN EARLY 1945. A COMBINED FORCE OF FILIPINOS AND AMERICANS, INCLUDING THE 169TH, 103RD, 133RD, AND 172ND INFANTRY REGIMENTS OF THE U.S. ARMY, TOGETHER WITH GUERRILLA UNITS MARKING, RAMSEY, AND HUNTERS ROTC, WAS SENT TO RECAPTURE IPO ON MAY 6, 1945.

THE BLOODY BATTLE LASTED ABOUT FIVE DAYS, MARKED BY HEAVY BOMBING. ON MAY 17, 1945, AT 10:30 IN THE MORNING, THE MARKING GUERRILLAS SUCCEEDED IN RETAKING THE DAM AND RAISED THE AMERICAN FLAG ATOP THE POWER PLANT ON ITS SOUTHERN SIDE.