, ▁S lu ice ▁and ▁Rol ler ▁G ates ▁sets . ▁Its ▁clear ▁sp ans ▁are ▁ 4 . 6 % ▁ 1 . 5 3 ▁meters . ▁Its ▁gate ▁( open ing ) ▁height s ▁are ▁ 4 . 5 ▁and ▁ 1 . 0 ▁meters . ▁The ▁weights ▁of ▁the ▁leaves ▁are ▁ 5 . 4 ▁and ▁ 1 . 0 ▁tons . ▁The ▁operating ▁speed ▁is ▁ 0 . 3 ▁m ./ ▁min . ▁ ▁In ▁ 2 0 0 1 , ▁The ▁Japan ▁International ▁Co operation ▁Agency ▁( J IC A ) ▁has ▁approved ▁a ▁P 5 0 0 - mill ion ▁grant - in ▁aid ▁to ▁the ▁government ▁for ▁the ▁repair ▁and ▁improvement ▁of ▁the ▁Ang at ▁After bay ▁Reg ul atory ▁Dam ▁( A ARD ) ▁in ▁B ust os , ▁Bul ac an , ▁the ▁National ▁Ir rig ation ▁Administration ▁( N IA ) ▁said ▁here ▁over ▁the ▁week end . ▁ ▁By ▁the ▁ 3 rd ▁Qu arter ▁of ▁ 2 0 1 4 , ▁The ▁National ▁Ir rig ation ▁Administration ▁( N IA ) ▁is ▁b idd ing ▁out ▁the ▁P 1 - b ill ion ▁contract ▁for ▁the ▁re h abil itation ▁of ▁the ▁B ust os ▁rub ber ▁dam ▁in ▁Bul ac an . ▁ ▁Gallery ▁ ▁References ▁ ▁Category : D ams ▁in ▁the ▁Philippines ▁Category : H ydro elect ric ▁power ▁plants ▁in ▁the ▁Philippines ▁Category : D ams ▁completed ▁in ▁ 1 9 2 6 ▁Category : Build ings