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Case study

Wawa Hydro Pump Storage

Greater Manila region, in the Philippines, is home to over 28 million people. Drinking water and electricity are major infrastructure constraints for the region. The Wawa pump storage scheme is a series of dams generating 500MW of hydro power as well as supplying drinking water to the wider region.

What did we deliver?

RDCL has worked on Geotechnical ground investigations at Wawa region from 2015-2020. The jungle and remote access meant our skilled team had to roll up their sleeves and fight their way through dense vegetation to reach sites to conduct the extensive testing programmes. We deployed staff from both Manila and New Zealand offices and completed world record pressuremeter testing (Probex Roctest Dilatometer to 392m) along with extensive geophysics delivering high quality datasets to aid in detailed engineering designs for tunnel shafts, pump houses and dams.


RDCL saw the project as a must do at all costs, deploying complex equipment from all over the world, including Hydro-fracture, rock pressuremeter through to seismic geophysics.
Reliable trusted data delivery was the key for our clients to understand geotechnical risk and provide high quality engineering parameters.

Our televiewer datasets re-disk geotechnical drillholes, which produced poor core recoveries, therefore removing the doubt in the geological integrity of the ground.

Services and tools


  • Rock Pressuremeter Testing
  • Hydro-Fracture Testing
  • Surface Seismic mapping; MASW and SRT seismic surveys
  • Wireline Geophysics; Acoustic and Optical Televiewers
  • Geological modelling, ground modelling, risk assessments, foundation recommendations
Hawke’s Bay
Te Matau-a-Māui
+64 6 877 1652
8/308 Queen Street East,
Hastings, Hawke’s Bay,
New Zealand
Te Whanganui-a-Tara
+64 4 282 1564
Unit 2, 2 Raiha St, Elsdon,
Porirua 5022, Wellington,
New Zealand.
Tāmaki Makaurau
+64 21 884 190
Unit A3, 269a Mount Smart Rd, Onehunga, Auckland 1061, New Zealand.
+63 916 276 3133 (Admin)+63 917 184 5147 (Technical)
Unit 2106, Prestige Tower,
F. Ortigas Jr. Road, Ortigas Center, Pasig City 1605, Metro Manila, Philippines.