CASE HISTORY Rev: 02, Issue Date : May 2015 AMBUKLAO DAM WALL EROSION PROTECTION (I) Bokod, Benguet, Philippines ENVIRONMENTAL / HYDRAULIC / EROSION CONTROL Products: Maccaferri Geotextile Former Mattress, MacTex Nonwoven Geotextile Problem Ambuklao Hydroelectric Plant is located in the moun- tains of Bokod, Benguet and is about 36 kilometers Northeast of Baguio City. The plant was designed to pro- vide 75MW of energy to the Luzon Grid. When SN Aboitiz Power—Benguet, Inc. took over the operation, they began major rehabilitation and upgrade of the facil- ity. This includes works on upstream face of dam wall which suffered major erosion problem since 1999 when the power plant stopped its operation. As a result, their Consultant and the Contractor re- quested Maccaferri Philippines to come up with the best solution. Solution After considering the actual site condition, the methodol- ogy of construction and the type of material to be used, the Consultant came up with a solution. The upstream face remediation was composed of the concrete filled geotextile (Phase 1) and Galfan-coated gabions (Phase 2). For the concrete filled geotextile, Maccaferri recom- mended former mattress (MFM III Type). It is made from a high-strength woven geotextile. The former mattress’ main function is to provide protec- Before Construction November 2009 tion against rainfall washouts, high speed scour and compensate the uneven settlement of the underlying soil by covering and sealing the outer face of the slope. Project Owner SN-Aboitiz Power — Benguet, Inc. General Contractor McConnell Dowell Philippines Inc. (MCD) Consultant Tonkin & Taylor International Maccaferri Products 6,000 sq.m. MFM III Geotextile Grout Mattress 6,000 sq.m. MacTex Nonwoven Geotextile Construction Info Start of Construction : December 2009 Completion Date : March 2010 Before Construction November 2009 Engineering a Better Solution AMBUKLAO DAM WALL EROSION PROTECTION (I) Bokod, Benguet, Philippines During Construction February 2010 During Construction February 2010 MACCAFERRI (PHILIPPINES), INC. th Unit 30-C, 30 Floor , Rufino Pacific Tower, 6784 Ayala Avenue, Makati City 1226, Philippines Tel. and Fax. (+63-2) 813-0211 E-mail: [email protected] Web site: www.maccaferri.com.ph Engineering a Better Solution AMBUKLAO DAM WALL EROSION PROTECTION (I) Bokod, Benguet, Philippines Project Completed March 2010 Project Completed March 2010 MACCAFERRI (PHILIPPINES), INC. th Unit 30-C, 30 Floor , Rufino Pacific Tower, 6784 Ayala Avenue, Makati City 1226, Philippines Tel. and Fax. (+63-2) 813-0211 E-mail: [email protected] Web site: www.maccaferri.com.ph Engineering a Better Solution .