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DPWH, JICA FORGE STRONGER PARTNERSHIP AT BUSINESS MATCHING EVENT WITH JAPANESE COMPANIES
Department of Public Works and Highways (DPWH) Secretary Manuel M. Bonoan, together with Senior Undersecretary Emil K. Sadain, led the Philippine government delegation at the Business Matching Event organized by the Japan International Cooperation Agency (JICA) Philippines Office.
The event, held on September 13, 2024 at Dusit Thani Hotel, Makati City, brought together key Philippine government and JICA officials and representatives from Japanese companies to explore collaboration opportunities.
In his message, Secretary Bonoan convey deepest gratitude to JICA Philippines Office Chief Representative Takema Sakamoto for inviting in the event and for the invaluable support extended to finance several infrastructure flagship projects of DPWH that are aligned with the “Build Better More” agenda of the President Ferdinand R. Marcos, Jr. administration..
JICA-financed projects not only transform the country’s infrastructure landscape but also foster stronger bilateral relations between the Philippines and Japan, said Secretary Bonoan.
JICA remains a major partner in the Philippines’ infrastructure development, acting as the principal financier of several Official Development Assistance (ODA) projects.
During a media interview at the event with JICA Philippines Chief Representative Sakamoto, Senior Undersecretary Sadain, who heads the DPWH Unified Project Management Office (UPMO) operations overseeing large-scale infrastructure projects funded through ODA, highlighted the significant progress of several ongoing and recently completed JICA-financed initiatives such as road networks, bridges, and flood control facilities aimed at enhancing national infrastructure.
These include the Arterial Road Bypass Project in Bulacan, Flood Risk Management Project for the Cagayan de Oro River, Central Luzon Link Expressway, Pasig-Marikina River Channel Improvement Project (Phase IV), Cavite Industrial Area Flood Management Program, and Davao City Bypass Construction Project, among others.
Pre-construction projects include the Metro Manila Priority Bridges for Seismic Improvement (Guadalupe and Lambingan Bridges) and the Dalton Pass East Alignment Road Project. Meanwhile, the Parañaque Spillway/Tunnel Project, EDSA Transport Road Network Rehabilitation Project, Second San Juanico Bridge Project, and Davao City Flood Control and Drainage Project are under proposal stages.
Senior Undersecretary Sadain also highlighted two (2) additional flagship projects under the “Build Better More” Program, which are considered priorities in the current administration’s mega-bridge initiative. These include the Bataan-Cavite Interlink Bridge, now in the civil works procurement stage, and the Panay-Guimaras-Negros Island Bridges, currently undergoing detailed engineering design.
The event fostered opportunities for Japanese businesses to introduce their solutions and technologies to Filipino companies, government agencies, and other stakeholders, further enhancing the cooperation between the two nations.
The event was initiated in response to a request from Rizal Commercial Banking Corporation (RCBC) and Sumitomo Mitsui Banking Corporation (SMBC) for JICA to assist Japanese companies in expanding their presence in the Philippines.
Several Japanese companies showcased their expertise, presenting innovative solutions aimed at boosting infrastructure development in the Philippines and creating a win-win situation for both countries.

A Tale of Two Cities: Navigating the Eco-Battlegrounds Rule Under the Writ of Kalikasan
By Noel B. Lazaro and Mary Louisse S. Inguillo
Elizabeth Fisher, a renowned legal scholar at the University of Oxford, reminds us that environmental law isn’t a “magic wand.” Laws alone do not guarantee “happy ever after” endings. On July 8 and 9, the Malcolm Theater at the UP College of Law became a hub for the BIICL Global Toolbox on Corporate Climate Litigation, stirring discussions on legal responses to environmental issues and the judiciary's vital role. However, the effectiveness of legal remedies, particularly the groundbreaking Writ of Kalikasan, received limited spotlight.
This article examines recent court actions on the territorial scope of ecological damage to justify the writ and its potential to redefine environmental justice.
Understanding the Writ of Kalikasan: Criteria and Implications
Introduced by the Supreme Court in 2010, the writ is a beacon in Philippine law, addressing major environmental concerns such as oil pipeline leaks, open dump sites, hazardous plastic use, and GMO experimentation. The foundational case of Paje v. Casiño (G.R. No. 207257, February 3, 2015) highlights its role in offering judicial relief where legislative and administrative actions have fallen short.
Under the Rules of Procedure on Environmental Cases, the writ can be sought by individuals, entities, or groups on behalf of those whose constitutional right to a balanced and healthful ecology is violated or threatened. It requires evidence of environmental harm to life, health, or property in "two or more cities or provinces."
Despite its significance, many remain perplexed about the writ's impact and why certain activities persist even after its issuance. This confusion stems from the two types of writ: The first is a preliminary or peremptory writ, issued immediately after filing a petition, which requires a respondent to answer under oath within ten days but does not halt perceived violations. To this category belong the successive writs issued by the Supreme Court in 2023 to mining companies in Romblon (Batan v. Mines and Geosciences Bureau, G.R. No. 265146) and Palawan (Indigenous Cultural Communities of BICAMM Ancestral Domain, Brooke’s Point, Palawan v. Office of the Secretary of the DENR, G.R. No. 268140) without stopping their operations. The second is a judgment on the privilege of writ, issued after pleadings or affidavits and a trial. If granted, this writ can mandate actions such as permanently stopping certain acts or directing government or private entities, or individuals, to preserve, rehabilitate, or restore the environment. Only the Supreme Court or the Court of Appeals issues the writs.
Territorial Environmental Damage: An Iron-clad Requirement?
On May 14, 2024, the Court of Appeals addressed a petition for a writ of kalikasan in Batan v. Mines and Geosciences Bureau (CA-G.R. SP No. 00037-WK) after the Supreme Court referred the case to it to hear evidence and render a decision. Following a widely reported clash between police and protesters, the Bantay Kalikasan ng Sibuyan sought to stop Altai Philippines Mining Corporation (APMC) from operating in San Fernando, Sibuyan Island, Romblon because of APMC's lack of environmental compliance certificate and community acceptance. However, the Office of the Solicitor General and APMC questioned whether the allegations met the required scale of damage.
After proceedings, the court deemed the privilege of the writ inappropriate because the harm if true was limited to a single municipality within an island province. The conclusion reflects the Supreme Court’s tendency to deny this type of writ without proof of widespread ecological damage.
Consider LNL Archipelago Minerals, Inc. v. Agham Party List (G.R. No. 209165, April 12, 2016), where the evidence failed to show how constructing an access road on a low ridge impacts the communities of Zambales and Pangasinan; Braga v. Abaya (G.R. No. 223076, September 13, 2016), where the bidding process for expanding Sasa Wharf in Davao City was not considered a threat to residents of multiple cities; Dela Cruz v. Meralco (G.R. No. 197878, November 10, 2020), where the installation of transmission lines at NAIA III in Pasay City involved only a narrow strip across two barangays; and Citizens for a Green and Peaceful Camiguin, Sulog Inc. v. King Energy, Inc. (G.R. No. 213426, June 29, 2021), where concerns over a diesel plant were confined to Camiguin island comprising municipalities.
The Reluctant Protector
In contrast, the Court of Appeals recently granted the privilege of writ to halt the propagation and sale of Golden Rice and Bt Eggplant (Magsasaka at Siyentipiko Para Sa Pag-unlad ng Agrikultura v. Secretary of Department of Agriculture, CA-G.R. SP No. 00038-Kalikasan, April 17, 2024), and to order the listing of non-environmentally friendly plastic products (Oceana Philippines International v. National Solid Waste Management, CA-G.R. SP No. 00035-WK, July 9, 2024), citing potential “national impact” in both petitions.
And there lies the rub. What about “localized” damage following the Sibuyan template? Much like solutions for the Anthropocene, the answer can be elusive or inadequate. Fortunately, legal innovation thrives. The absence of a writ should encourage exploring alternative avenues, recognizing that appellate courts may lack the time and expertise to resolve technical disputes thoroughly and that administrative agencies or lower courts with specialized training are better suited for such assessments.
In other words, reliance on the role of appellate courts in environmental protection assumes what environmental law experts like Fisher, Lange, and Scotford describe as “an almost paradoxical” exercise of simultaneously seeking the “importance and limits” of judicial involvement in environmental law. Thus, it is imperative to develop “specialist environmental tribunals” (Environmental Law: Text, Cases and Materials, 2nd Ed. [2019]) or revitalize “green benches” created under SC Administrative Circular No. 23-2008 to customize the writ for lower courts and bring it closer to the communities.
For example, marginalized groups and witnesses traveling from Luzon’s isolated areas to Manila for watershed destruction hearings face high costs, logistical hurdles, or personal risks, often discouraging the pursuit of the writ. Another troubling illustration is seen in Abogado v. DENR (G.R. No. 246209, September 3, 2019), where fisherfolk of Kalayaan Islands and Zambales either withdrew their petition or became unreachable after filing it at the Supreme Court.
Revisiting the writ’s stringent requirements, establishing evidentiary presumptions, reconsidering the burden of proof, and limiting appeals could address critical gaps. None of this is easy. But the lesson of the tragedy of the commons also demands collective disruptions of the rules. As Justice Marvic M.V.F Leonen admits, “[W]e cannot presume that only the Supreme Court can conscientiously fulfill the ecological duties required of the entire state.”
Meanwhile, advocates will continue pushing for single political subdivisions, like the treasure islands of Bohol and Palawan, to be included within the writ’s ambit. After all, environmental issues transcend boundaries. But until the eco-battlegrounds change, petitioners must navigate the un-fairy tale requirement of two or more cities or provinces.
Noel B. Lazaro is a director and general counsel at Global Ferronickel Holdings, Inc. His extensive practice spans diverse fields, including environmental litigation. He was an associate at SyCip Salazar Hernandez & Gatmaitan and a partner at Siguion Reyna, Montecillo & Ongsiako. A UP College of Law graduate, he teaches evidence, special proceedings, and special writs at law schools.
Mary Louisse S. Inguillo is a senior legal officer at Platinum Group Metals Corporation, specializing in corporate law and litigation. She acts as corporate secretary for various companies. A DLSU-Tañada-Diokno School of Law graduate, she lectures on special proceedings and criminal procedure at law schools.

Regulating the Geology Profession
I applied for the position of Chairperson of the Professional Regulatory Board of Geology (the “Board”) in 2019. My ordeal started with the submission of my personal data sheets filed under oath, curriculum vitae outlining my academic and career history, and clearances from various government agencies to affirm the fact that I have had no past or existing criminal and administrative cases. I went through an interview process before two Members of the Professional Regulations Commission together with other aspirants for the position.
In 2022, I was asked to resubmit all the documents and I thought that since the pandemic was still ongoing, the documents just got misplaced along the bureaucratic lane. One fateful day, I received a call from the Office of the President and I was told to go to Malacanan Palace and was instructed to wear a Barong Tagalog for the occasion. Other than that, the person on the other end of the phone was curt and offered no further information when asked for the reason. So off I went to the Palace on a Sunday afternoon. My entry to the palace, however, met some hitch because security officers required a current COVID-19 swab test before I was allowed access. The person who I spoke to over the phone made no mention that I should get a test beforehand. Fortunately, the Palace has a testing facility. So after the swab sample taken from the far back of my nasal cavity turned out negative, I was finally allowed ingress. I was seated with other people wearing their finest Filipinianas when suddenly, out of the chamber came out two high-ranking government officials. Lo and behold, we were informed that our appointments for the government posts we applied for have been signed by then President Duterte. After the usual congratulatory speeches, pep talks, handshakes, and fist bumps, we were then instructed to go to our respective agencies for the mandatory oaths of office so we can commence our engagements.
Thus began my second career in government as I worked as a geologist before at the then Ministry of Energy before I became a lawyer. It has been more than two years now since I headed the Board that supervise and regulate the practice of the geology profession. There is no denying the importance of Geology, the science that deals with the earth, its structure, composition and history. Few fields of study can play such a profound role in protecting people's lives. Geology is so central to the lives of many Filipinos who are often threatened by natural hazards associated with earthquakes, volcanic eruptions, as well as landslides. Geology is also essential to the understanding, conservation and management of our environment. Moreover, geologists are essential in the search for and development of energy and mineral resources whose products are important to all aspects of modern life. Thus, Republic Act No. 10166, also known as the “Geology Profession Act of 2012”, describes the practice of geology as “vital to national development”.

Professional regulation is particularly essential for the practice of geology. A geologist who meets the regulatory requirements is given a certification by the Professional Regulations Commission (PRC) to earn the title “Registered Geologist”. Once a geologist is registered and certified, only then can the individual legally provide professional geological services. Data from the PRC indicate that as of July 2024, there are 3,669 registered geologists and 2,082 with valid PRC Identification Cards.
The regulation of the geology profession is necessary to protect the public and maintain confidence in the profession. The Professional Regulatory Board of Geology, mandated by legislation as the regulatory authority, is tasked to ensure that all registered geologists are effectively regulated to strict professional standards. As part of most professional regulatory requirements, individuals applying to be professional geologists must be able to meet the educational, experience, and fitness required by law and administrative regulations. Violations of the provisions of the Geology Profession Law entail the imposition of penalties.
There are numerous levels of regulating the geology profession: licensure examinations; registration and certification; continuing professional development; and career progression and specialization. The Board also provides a defined roadmap for the practice of geology.
In addition to these responsibilities, the Board must also establish and maintain professional and occupational standards, enforce rules and regulations relative thereto, investigate violations of ethical standards, and adjudicate administrative cases against erring professionals. Professional regulation protects the public by providing assurance that regulated professionals are competent and by providing means for imposing discipline and sanctions when necessary. In 2014, the Board adopted and promulgated the Code of Ethics for Geologists for the enhancement and maintenance of high professional, ethical, and technical standards for registered geologists. Through this code, the Board shall ensure that it recognizes its responsibility to the public that actions of registered geologists promote safety, integrity, and fairness, thereby encouraging public confidence in the profession.
Computer-based Licensure Examinations
A critical component of professional regulation involves the development, administration, and maintenance of the licensure examinations. The Board has the responsibility of ensuring the quality of the examinations, which cover the knowledge and skills necessary for competence in the profession. Test questions must meet established standards and are meticulously prepared in accordance with an approved Table of Specifications covering vital geoscience subjects. Questions are also peer reviewed and vetted by professional test consultants.
The Board was one of the first to implement the computer-based licensure examinations (CBLE) in the PRC-regulated professions having successfully conducted the first pilot testing of the CBLE for Geologists in December 2021. This was followed by a second and third CBLE in November 2022 and 2023.
The number of examinees has been increasing since the COVID-19 pandemic (Figure 1). In 2020, there were no licensure examinations but two examinations were given in 2021. The number of examinees since 2021 has been consistently increasing but it has not yet reached the over 400 examinees taking the exam during the three-year period before the pandemic.
The 47% passing rate for the 2023 CBLE is close to the middle of the band of passing rates, which has been between 40% and 60% in the last few years (Figure 2). Also, first timers have had a passing rate of between 54% and 82%. Repeaters have a passing rate of less than 40%.
Continuing Professional Development and Career Progression and Specialization Program
In addition to responsibilities related to the licensure examinations, the Board’s additional mandate includes assuring continued professional competence. Registered geologists need to undertake continuing training and development to ensure that they remain qualified, competent, and updated with the latest technological, environmental, and social responsibility developments.
Republic Act No. 10912 or the “Continuing Professional Development (CPD) Act of 2016” states that CPD Programs shall be formulated and implemented in the geology profession in order to enhance and upgrade the competencies and qualifications of registered geologists pursuant to the Philippine Qualifications Framework, the ASEAN Qualifications Reference Framework and the ASEAN Mutual Recognition Arrangements. The renewal of PRC professional license requires the registered geologist to earn CPD units or points through learning activities like training or learning seminars to develop and enhance their abilities, personal skills, and proficiency. The CPD points should be validated by the CPD Accreditation System.
Further, the CPD Law also mandates the PRC and the Board to formulate and implement a Career Progression and Specialization Program (CPSP) for the geology profession. The Board is mandated to issue guidelines for the formulation of the CPSP for inclusion in the Philippine Qualifications Register (PQR). The PQR is the national database of quality assured qualifications authorized under the Philippine Qualifications Framework (PQF). It provides information to employers, education and training providers and students. The information includes the Qualification Title, Qualification Descriptors, the PQF Level, the Authority-granting Agency, the Qualification Code, the Instrument and Date of Authorization.
The Board shall also formulate the CPSP for the profession to address the Pathways and Equivalencies of the PQF. Republic Act No. 10968 or the “Philippine Qualifications Framework Act” states that it is the policy of the State to institutionalize the PQF to encourage lifelong learning of individuals, provide employee specific training standards, and qualifications aligned with industry standards. A PQF shall be established which shall describe the levels of educational qualifications and set the standards for qualification outcomes. It is a quality-assured national system for development, recognition and award of qualifications based on standards of knowledge, skills and values acquired in different ways and methods by learners and workers of the country.
The Implementing Rules and Regulations (IRR) of the PQF Act provides for the aligning of domestic qualification standards with international qualifications framework. The IRRs aims to enhance recognition of the value and comparability of Philippine qualifications with global standards and support the mobility of Filipino students, workers and professionals. The PQF describes the levels of educational qualifications and official recognition of a person's learning achievements. It also sets the standards for the knowledge or skills gained by individuals after undergoing a certain learning or educational program.
Inspection and Monitoring
The Board is tasked under the Geology Profession Law to upgrade geology education and the quality of geologists whose standards of professional practice shall be excellent, world-class and globally competitive. Among the tasks in the Board’s regulatory and development functions are:
- Visit/inspect facilities, faculty, and equipment of schools offering geology courses and establishments employing professional geologists; and
- Recommend measures necessary for advancement of the geology profession through the preparation and implementation of professional competitiveness roadmap.
The inspection and monitoring of educational institutions and establishments are aimed to determine the compliance of educational institutions and establishments with the professional, ethical, and technical standards of practice set by the Board. Mandatory ocular inspection and monitoring activities are also conducted to keep track of the conditions affecting the practice of the geology profession. The Board conducts face-to-face and on-site inspection and monitoring to visit and observe the different physical facilities, laboratory, and equipment of educational institutions, government agencies, and private establishments employing geologists.
In the Board’s inspection and monitoring activities, it was noted that a substantial number of geologists employed in government agencies are engaged under contracts of services because of the lack of permanent plantilla positions. This has been attributed to difficulties in getting approval of proposed positions at the agency and Department of Budget and Management levels. Thus training of employees under contracts of service often times doesn't benefit the agency since these geologists ultimately leave government service to look for jobs with permanent tenures.
The Board also observed the lack of training and foreign scholarship opportunities for geologists employed in government regional offices due to the perceived unequal distribution and allocation of scholarships and trainings between the Central Office and the Regional Offices. In some instances, geologists from regional government offices lament the high costs associated with the renewal of PRC licenses, maintenance of active membership in the Geological Society of the Philippines (GSP), and participation in the Geological Convention (GeoCon), which is usually held in Manila especially if such activities are not subsidized by their agencies. The GSP is mandated under the Geology Profession Law to integrate all registered geologists into one national organization and where membership therein is automatic and mandatory.
Problems faced by geologists from regional government agencies also include working in limited office spaces, non-working geological equipment, and limited storage for rocks and minerals samples. However, government offices cannot request for assistance directly from private companies in procuring equipment and training programs because it may be violative of existing laws unless expressly allowed as assistance stipulated in government contracts like mining agreements and energy service contracts.
On the private sector side, the Board needs to strictly monitor expatriate geologists working in Philippine operations of foreign companies to make sure that they have all the mandatory requirements before being employed by their companies. Under the Geology Profession Law, only Filipino citizens can practice the geology profession in the Philippines. Foreigners are however, allowed if their country has official parity agreements with the Philippines. Under the “PRC Modernization Act of 2000”, the PRC shall upon recommendation of the Board, approve the registration of and authorize the issuance of a certificate of registration and license to a foreigner who is registered under the laws of his state or country. The foreign geologist shall secure a temporary/special permit from the Board prior to arrival in the country before he is allowed to practice in the Philippines.
Geologists employed in private companies have notably less foreign scholarship opportunities unlike those working in government. The Board recommends that private companies must provide scholarship opportunities to their employees similar to those offered in government agencies. This companies were also advised to subsidize their employees’ membership in the GSP and participation in the GeoCon where they can earn CPD points. Private companies should also apply as accredited CPD Providers since they often provide in-house trainings and seminars to their employees and the participants can then earn CPD points.

The Board also conducted inspection and monitoring of educational institutions offering geology courses to evaluate their compliance with regulations and standards. The inspection and monitoring usually cover a review of school facilities, curriculum, practicum programs, licensure passing rates as well as faculty qualifications. In most instances, the Board observed the alarming lack of instructors and limited number of full-time faculty in regional educational institutions. Some of the faculty members were not licensed geologists but were teaching geology subjects. In one particular institution, even the Department Head is not a degree holder of Geology. Some faculty members were not updated with their PRC licenses despite the fact that teaching geology courses falls under the definition of the “practice of geology”.
The Board also noticed the absence of laboratory courses for earth resources subjects. Mineralogy, Petrology, Paleontology and Economic Geology/Metalliferous & Non-metalliferous Deposits lectures need laboratory counterparts to deepen the understanding of these subjects by the students. urther, the rock and mineral collections need to be upgraded adequately to support these laboratory courses. One institution has no laboratory and inadequate rock and mineral samples. A substantial number of regional educational institutions need to upgrade microscopy, mineral, rock & fossil collections, science journals, and library facilities. Their graduates are only able to have exposures to a wide variety of mineral, rock, and fossil samples in Manila when they are already reviewing for the licensure examinations.
Regional institutions need to exert more effort to request assistance from mining and energy companies to augment their laboratory equipment and samples. Because of inadequate or limited graduate studies opportunities of their faculty, these institutions must formulate a comprehensive development plan for their department. They should encourage and support student and faculty participation in local and international trainings, internships, and conventions, through collaborations with foreign universities, government agencies, private companies, and development agencies. Also, they need to exert more effort to request assistance from government agencies such as the Department of Energy and Department of Environment and Natural Resources to augment their libraries and equipment. These agencies can channel training funds from petroleum service contracts and mining agreements to fund faculty development and scholarship programs. Geologists employed by government agencies and resources companies should also be encouraged and incentivized to serve as part-time lecturers for educational institutions to augment the need for qualified faculty members.
Based on the performance of the regional universities in the recent years’ licensure examinations, there is an urgent need to review and revise the geology curriculum and course descriptions. The Board in its inspection and monitoring realized that these institutions still adhere to the old curriculum thus leaving out important subjects covered in the licensure examinations. This puts their graduates at a disadvantage as shown by their low passing rates in the geology licensure exams. The Commission on Higher Education Technical Panel for Geology is tasked to revise the existing geology curriculum and address the lack of qualifications of some faculty members in these institutions.
Conclusion
The management of natural resources, protection of the environment, and mitigation of geohazard risks require skilled and experienced geologists. Population growth, energy and raw materials policy, de-carbonization, technological advances, and climate change have created more challenging responsibilities for geologists for the protection of the public. The regulation of geologists facilitate the codification of ethical practice, international mobility and comparisons of qualifications, and interchange of ideas and knowledge. The responsibility of the Professional Regulatory Board of Geology is to make certain of competent practice within the geology profession which starts at ensuring that educational institutions are able to produce world class and globally-competitive graduates. At the same time, licensure examinations remain critical as an entry to the profession and undoubtedly important for the Board since they must be maintained under high professional standards and transparency. The Board knows and understands its responsibilities and is well aware that it may suffer public censure and criticism if problems arise from the wrongful, negligent, and lax administration of its regulatory functions.
Fernando “Ronnie” S. Penarroyo specializes in Energy and Resources Law, Project Finance and Business Development. He is also currently the Chair of the Professional Regulatory Board of Geology, the government agency mandated under law to regulate and develop the geology profession. He may be contacted at fspenarroyo@penpalaw.com for any matters or inquiries in relation to the Philippine resources industry and suggested topics for commentaries. Atty. Penarroyo’s commentaries are also archived at his professional blogsite at www.penarroyo.com

A Technical Overview of a Water Access Tunnel Constructed by Filipino Mining Engineers - Part 2
Part 2
A group of all-Filipino mining engineers under the support of project subcontractor Paramina Earth Technologies, Inc. (PARAMINA) were greatly involved in the success of the Upper Wawa Pumping Station Water Access Tunnel project. These mining engineers developed and excavated an 8m wide x 7m high x 1,011m long tunnel with the highest considerations for safety, without a single lost time accident (LTA) accident and or rockfall incident. The project applied the New Austrian Tunneling Method following international tunnel design, plans and was remarkably ahead of the adjusted timeline upon its completion.
Part 1 of this article introduced the technical aspects and purpose of the project. In Part 2, we discuss the people involved, the challenges encountered, the innovations applied, and milestones achieved. Part 1 can be viewed here: https://www.philippine-resources.com/articles/2024/8/a-technical-overview-of-a-water-access-tunnel-construction-built-by-filipino-mining-engineers
Project Owner and Consultant
The mega-infrastructure “Wawa Bulk Water Project” (herein referred in our article simply as the Wawa Dam Project) is owned by WAWAJvCo Inc, a joint venture initiative between Prime Infrastructure Capital Inc and the San Lorenzo Ruiz Builders and Developers Group, the owner of the water rights in the area. WAWAJvCO engaged the services of AFRY as its advisor, an international leader in engineering and design.
Project Main Contractor/Consultant
A crucial component of the Wawa Dam project namely, the “Upper Wawa Pumping Station (UWPS)” Project was awarded to Prime Metro BMD Corporation (PrimeBMD), a subsidiary of Prime Infra in joint venture with BMD, one of the biggest privately owned contractors based in Australia. To ensure its successful execution, Lombardi Engineering, a Swiss multidisciplinary engineering firm specializing in underground and water infrastructure was engaged as the project’s designer and advisor by the contractor.
Project Tunneling Subcontractor
Following a comprehensive review of several bid submissions and site visits to assess the various bidders’ facilities, shop, equipment and technical expertise, the contractor selected PARAMINA as the subcontractor for the tunnel excavation of the UWPS project. Additionally, Paramina was entrusted with the Slope Stabilization Works, done prior to the actual tunnel excavation, that established a durable, all weather slope protection for the East and West Portal and the main access road, designed to last for a century.
Project Management Team
The senior project management, headed by a team of dedicated mining engineers with previous experience in tunneling, was instrumental to the success and punctual completion of the UWPS Main Access Water Tunnel Project without any Lost Time Accident. [2G1] Their leadership and expertise were key to the project’s remarkable safety record.
Backing the senior management was another team of junior mining engineers who played a pivotal role in project initiation and completion. Additionally, mechanical and electrical engineers and technicians were integral to the equipment maintenance and operational support. They were at the heart of the tunnel operations, working round the clock to oversee shift activities. Work was 24/7, regardless of holidays and weekends. Their leadership ensured safe and efficient supervision of the skilled miners, mechanics, and electricians, and operations of a wide array of underground mining machinery and equipment.
First things First- UWPS East Slope Stabilization
Prior to the actual tunnel portal excavation, a team was formed to stabilize the slope above the east portal on March 14, 2022. Another team was formed to erect the temporary facilities, offices, equipment workshop and the construction of explosives magazines in preparation for the blasting works in the Tunnel. The Notice of Award and Notice to Proceed on the Slope Protection Works at the East Slope was received the following day on March 15, 2022 with a target completion date of May 30, 2022. There was also a slight setback due to contractor’s delay in excavating original natural ground profile down to its designed slope batter and benching, thus resulting in late handover of the East Portal’s designed floor elevation of 144masl, to the Subcontractor for it to start the installation of the tunnel umbrella using SDAs.
Start of Portal Excavation
On September 27, 2022, the project reached a significant milestone with the commencement of drilling and setting up the portal umbrella. This involved the installation of Self Drilling Anchors (SDAs) measuring R38mm x 6m in length, arranged in two rows, each spaced 200 mm from the outer edge of the Tunnel Portal’s designed crown. The installation process entailed alternate drilling and grouting of the SDAs until all 131 units were securely in place. These SDAs were drilled directly into their positions and grouted to serve as forepole support, enhancing the stability of the rock mass at the tunnel’s crown during portal construction. Following the geologists’ assessment that the rock mass rating at the portal ranged from 0-20 RMR, Lombardi’s recommendation was to proceed with excavation but using the breaker tool of an excavator, advancing in increments of 0.6m prohibiting the use of drilling and blasting. This approach allowed for the installation of SRS completion of the full-face excavation; the application of 400-mm thick shotcrete on the crown and sides of the tunnel portal, along with a 50-mm thick layer of shotcrete on the tunnel face, providing a temporary protective layer of support for miners while working in proximity to the unsupported face.[2G2]
Innovations to the design introduced by Paramina
The initial design for the east portal “umbrella” tunnel crown support by Lombardi included the driving of 150mm diameter micro piles and up to lengths of up to 12m, intended to be drilled around the tunnel crown’s perimeter. While this system was accessible in other regional markets, including the Philippines, the local micropiling contractors were only equipped for vertical micro pile equipment installations therefore lacking the capability for horizontal applications.
Consequently, PARAMINA proposed to the Main Contractor’s Project Manager, Technical Director and to Lombardi the substitution of the micro piles to self-drilling anchor rock bolts. This switch to SDAs expedited the process and proved to be more cost-effective than the original micropile design. The SDAs were likewise recommended as the preferred rock bolts for support types 2, 3, and 4, more especially because of its simple and easy installation. The process of “drilling, pulling out the drill rod, and inserting a rock bolt” was eliminated and streamlined into a single step, thereby improving overall tunneling cycle time. In addition, the original plan included the installation of “Fiberglass Bolts” for temporary face support which was both costly and time consuming. PARAMINA suggested the application of quick-setting shotcrete to reinforce the tunnel face.
Tunneling Challenges
One significant hurdle in the project was the insufficient geological data along the entire length of the proposed tunnel, attributed to the limited diamond drilling done by the project owners. Only five drill holes were done throughout the whole 1,011m tunnel length which was conducted during the project’s pre-feasibility study. Consequently, Lombardi deemed had a low confidence in the quality of geological information. To manage this risk, PARAMINA adopted a timely approach of ordering tunnel supplies, particularly imported rock bolts, to avoid any surplus at the completion of the project.
Additional challenges included frequent hiccups in shotcrete mix deliveries by the contractor, impacting the shotcreting cycle. PARAMINA responded by deploying its own transit mixer trucks to expedite timely delivery and availability of the shotcrete mix. Another issue was the scarcity of clean drilling water leading to complications such as fouling of the jumbo drill’s rock drill, delays in drilling and shotcreting, and blockages of shotcrete machine slicklines which were addressed by sourcing water from nearby natural springs and groundwater inflow from drain pipes installed along the tunnel’s walls and crown.
The most daunting obstacle was the low availability of the Normet robotic shotcrete machine and the Sandvik Axera T08 Twin Boom Jumbo drill rig, which frequently paralyzed the tunnel work cycle. Faced with little alternatives, PARAMINA procured new machinery: a state-of-the-art XCMG Robotic Shotcrete Machine with a capacity of 30-50 cubic meters of shotcrete per hour and two units of the Furukawa FDR Twin Boom Jumbo Drill rig with man boom basket.
Tunnel Development, Milestone Break Through, and Handover
With the East Portal stabilized and fully installed with SRS, rock bolts and shotcrete, the real tunneling work began with drilling and full face blasting on the 22nd of December 2022. This marked the first day of the 290-day development timeline set for the tunnel to hole out the 1,011 meters with an average of 3.5m of tunnel advance per day. The anticipated breakthrough date was October 7, 2023, with an additional eleven days allocated for post-tunnel remediation works.
The much-awaited milestone, the tunnel breakthrough, occurred a month ahead of schedule on September 5, 2023. Finishing touches were applied, and the extended 1.011-km tunnel was officially handed over to the contractor on October 15, 2023, for final joint inspection.
Safety, Health, and Environment
PARAMINA recognized the importance of safety, health and the well-being of its employees and the protection of the environment, adhered to the strictest standards of Safety, Health, and Environment in the project. Different degrees of job hazards were identified in the project’s scopes, such as slope stabilization works at the newly excavated road cuts to make way to the tunnel and excavation of the Upper Wawa Main Access Tunnel.
In recognition of the impressive feat that was the project completion with no loss time accident (LTA), the President of WawaJVCo acknowledged the contribution of PARAMINA and its dedication to safety and environmental stewardship last July 27, 2023 during the milestone celebration of the project’s “One Million Safe Manhours with incidents as attested by DOLE Regional Officials on the same occasion.
Some of the environmental initiatives contributed by PARAMINA to the project included the provision of complete Personnel Protective Equipment (PPE), daily toolbox meetings and the construction of settling ponds outside of the portal of the main access tunnel to ensure that solid or liquid pollutants are effectively separated and disposed of properly, to name a few. PARAMINA also championed the recycling of scrap metal, hoses, lumber, and the like and ensured that garbage was always properly disposed of at the designated disposal sites.
Moreover, to control noise and vibration from blasting works, the use of Long Period delay detonators ensured that the maximum instantaneous charge (MIC) firing at any one time were controlled below the industry accepted vibration and decibel limits.
Remediation and Hand Over of Tunnel Project
Guided by the main contractor, PARAMINA’s emphasis was on three key remediation tasks: addressing the “drummy” sections in the shotcrete lining, performing rock bolt “pull-out” tests and the execution of “in-fill” grouting within the Support Type P section of the tunnel. The first one was done by breaking open the shotcrete lining identified by the Contractor’s QA/QC team, with an Excavator fitted with a moil point and then reapplying shotcrete to the designed thickness. The second remediation task involved performing pull-out tests on 10% of all the installed Rockbolt anchor supports along the tunnel’s full length. It is worth mentioning that each rock bolt tested passed the required standards successfully. Lastly, to address the inevitable voids left in-between the rock face and the SRS, in-fill grouting was carried out by the ChemGrout CG-542 Electro-Hydraulic grout pump, particularly along the section of the tunnel supported by Steel Rib Supports (SRS).
With the remediation tasks fully addressed and following another exhaustive and detailed joint inspection and review of the Subcontractor’s workmanship quality, the milestone final approval was formally acknowledged by the Contractor with the issuance of the Certificate of Project Completion.
Acknowledgments
The project’s success depended on the valuable cooperation among key stakeholders, especially the project owner, WawaJvCo and its project representative, Mr. Rey Bodano, the contractor’s project team, Prime Metro BMD, the Project Consultants and Designers, Lombardi and Afry, the Local Government Unit of Calawis and Sitio Apia, Antipolo, the Firearms and Explosives Office, Provincial and Regional Police Offices of Region 4A, Key Suppliers of Machinery, Equipment, Consumables, Explosives and the locals of Sitio Apia and affected Indigenous People of Antipolo City and finally the Paramina Management, Project Management Team, Supervisors and the men and women of the Paramina Project Team.

Break through Geotechnical Complexity through Failure Mode Analyses
The early design stages are the best time to fully explore ground risks and focus teams on mitigation and intervention, before a project gets too far down the track. Doing this formally and methodically through the Potential Failure Mode Analysis (PFMA) framework offers best-case potential for project success.
How PFMA works in Geotechnical Engineering
Potential Failure Mode Analyses (PFMA) offer a rigorous, transparent and defensible process to get quickly to the core of complex geotechnical problems, track mitigations and effectivity outcomes.
Geotechnical problems are routinely complex due to the range of unseen unknowns in the ground. The problem and potential consequences can be multiple and confusing and very difficult to resolve through informal process.
The most common result following that path is loss; either through time or cost due to poorly conceived investigation, improper or poorly conceived design, and contract over-runs due to unforeseen conditions. In the worst case, failure of critical infrastructure or components can lead to project closure.
For Project Managers, it is critically important to not get lost in the confusion and to identify and resolve the crux issue as quickly as possible. The PFMA is the way to save time and money in the most efficient and transparent manner possible.
RDCL’s Application / Using PFMA with RDCL
RDCL is skilled in the use of Failure Mode Analyses. In particular, for the assessment of dam structures where the consequence of failure can be very high, and for all significant ground investigation for infrastructure where unforeseen ground presents the greatest risk in terms of cost and time.
Projects (https://www.rdcl.co.nz/projects/) where we have applied PFMA include our work on the Harapaki Windfarm for foundation assessment including use of appropriate investigation techniques, regional flood stopbank (levee) upgrades and emergency works and design and construction of the Kereuru Water Storage structure, all in New Zealand.
In the Philippines we have assessed geotechnical implications for the Wawa Water Storage project investigations and for tailings dams on leading mine sites.
Identify Sources of Failure Before they Happen
Developed in the 1940’s, Failure Mode Analyses seeks to document the potential sources of failure, what the consequence of the failure may be and how to mitigate the consequence or remove the potential source of failure.
The method is used by leading design and design critical companies throughout the world as a powerful method to capture and communicate risk. An example of a part snapshot of a hypothetical Tailings storage facility is shown.

Failure mode analyses can therefore benefit all stakeholders in a significant (or even simple) project by developing a better understanding of design, construction or operational weaknesses.
This ties into our philosophy and drive at RDCL to help promote better decision-making and costing through proper and appropriate ground investigation as we discussed in our previous article (Philippine Resources Journal, March 2024).
Our approach of considering the geotechnical aspects of the project or piece of infrastructure over the whole life-cycle is explained here in our video: https://www.youtube.com/watch?v=1Mtoz0B-LYk&ab
Standard Risk Assessment
Standard Risk Assessment methodologies such as is ISO 31000, the international standard that sets out the principles and guidelines for effective risk management, guide the development of the PFMA.
This standardised approach ensures a commonality of language and consistency of approach allowing organisations to communicate their risk and risk mitigation strategies effectively and move quickly on resolution.
Guidelines for the use of Failure Mode Analyses are freely available from the World Bank (2021) and other leading jurisdictions and organisations.
How to make it work / Where the rubber hits the road
In all cases, the PFMA process includes collaborative, workshop based efforts by stakeholders, led by skilled practitioners in risk assessment backed by expert advisors. To move quickly and accurately, it is important to bring everyone along for the ride from early in the process, keep the document alive and regularly return to check on assumptions and the effectivity of mitigations and solutions applied.
Without closing the loop on the action-checking process, much of the group’s efforts are wasted. By engaging an external party to help guide the process, you achieve an impartial, best for project approach and are supported in keeping critical actions on track.
Partner with us and take action at the time when it is most impactful to your project.
Cam Wylie, Director, RDCL
Cam Wylie is the Managing Director, CEO & Principal Engineer at RDCL Limited. With 30 years in the industry, Cam is a Chartered Professional Engineer with extensive overseas experience, working on major projects in the Philippines, Indonesia, Africa, Australia, and New Zealand. His expertise includes Project Management, Geotechnical/Dam Engineering, Mining, Roading, Infrastructure, large subdivisions, and Residential Dwellings, and he is a contributor to the Hawke’s Bay Cyclone Gabrielle Engineering Leadership Group.

Digital workflows are Accelerating Mining Operations Excellence
Integrating new digital workflows
New innovative technology used in mining is generating more detailed data than ever before. LiDAR scans of underground excavations create 3D, high resolution, georeferenced images of rockface. This information can be utilised to provide better grade control, cut costs, and increase productivity. However, mining organisations can extract even more value from this data if they manage it with the help of digital workflows.
A major challenge for the sector is the integration of new digital workflows across an organisation. Currently, companies are having to purchase technology from several vendors. Often, the different technologies are not compatible with each other, creating silos and disjointed time-consuming workflows.
The challenge is compounded by a lack of standardisation across the industry, making it difficult for mining companies to find and adopt a common digital workflow solution. Matt Blattman, Director of Technical Services, Hecla Mining, explains, “We’d like to standardise, but within our own company, with four different mines, four different types of deposits and four different mining methods, it’s hard to find something that fits every situation.”
Encouraging teams to use a new workflow can be a challenge too. There is frequently a degree of resistance to change, and people will look for a reason to revert to their old ways of working. Dr. Grant Kopec, VP of Global Field Operations for Intellisense.io, comments, “One of the things that kicks people out of a new workflow and back into the old one is a data quality or a data outage issue where they say, see it’s not working or it’s inaccurate.”
Mining executives need to ensure a high degree of personal interaction and comprehensive support to teams to ensure the new systems are smoothly integrated into the operations and used consistently.
Bringing together data, services and applications in real-time.
In many mining operations, the geologists are stuck with the workflows dictated by the systems they use. According to Seequent’s recently published Geoprofessionals Data Management Report, geoprofessionals in mining said they spend 27% of their time on data, and while this is a marked improvement from previous years, adoption of digital workflows will lead to better operational performance.
Alex Boucher, Technical Solutions Director, Seequent, explains, “Within an open cloud-based environment of solutions connected through seamless integrations, mining companies will be able to bring together data, services and applications in real time.” Adoption of these digital workflows will put the right information, from raw data capture to mine modelling, into the right hands at the right time.
Towards digital transformation
Industry thought leaders are advocating the integration of digital workflows as an essential step to improving performance. Mining needs to use new technology to work smarter and optimise operations.
“High-performing operations are enabled through partnerships – like-minded innovators working together to solve real-world mining challenges,” says Pieter Neethling, Segment Director, Mining Operations at Seequent.
Work with local knowledge and expertise in the Philippines
Infrasys is an authorised Seequent Channel Partner, bringing mining and geotechnical solutions to professionals across the Philippines. To learn more about Seequent solutions for mining operations, go to infrasys-mining


















