Corporate Social Responsibility › Environmental Stewardship

Championing marine diversity

THE GIANT CLAM (Tridacna gigas) is one of the most endangered marine species in the world. It survives only in a safe and unpolluted marine environment.

Giant clams promote biodiversity where they live because they attract corals, fishes and smaller marine biota. These species also clean their immediate environment when they siphon in seawater for food and then release clean, clear water back to the sea.

Semirara Mining and Power Corporation spawns and reseeds giant clams through its Semirara Marine Hatchery Laboratory (SMHL).

A marine resource development technology facility, SMHL has been successfully spawning seven (7) endangered species of giant clams since 2010.

It applies the technology developed by Dr. Edgardo Gomez, a national scientist and professor emeritus at the University of the Philippines-Marine Science Institute (MSI).

“The work being done in Semirara is very significant in marine resource conservation and biodiversity enhancement, not only in the Philippines but also in Southeast Asia,” Gomez says.

By the end of 2015, the facility has increased the giant clam population to 112,378, while reseeding over 38,000 of the species in the shallow waters of Semirara Island.

In November 2015, the Semirara Marine facility also turned over one hundred giant clam juveniles to the Department of Environment and Natural Resources (DENR) – Batangas Province, for reseeding along the Verde Island Passage, which is dubbed as the world’s “center of the center of marine shore fish biodiversity.”

• Participated in ‘Adopt-An-Estero,’ a joint project of the Department of Environment and Natural Resources (DENR) and the Rotary Club of Diliman Silangan (RCDS)

More than 100 volunteers from DMCI Homes, DENR, RCDS, Metropolitan Manila Development Authority (MMDA), and Boys Scouts of the Philippines (BSP) participated in cleaning-up the 1.3-kilometer creek in Barangays Bahay Toro and Culiat in Quezon City.


The company also adopted and agreed to the annual clean-up of the Pasong Tamo creek, which passes through Stellar Place, a two-tower DMCI Homes community on Visayas Avenue, Quezon City.


• Hosted the second leg of ‘Greeniosity’, a tree planting activity. Together with the local government of Marikina City, employees of DMCI Homes and other DMCI companies joined in planting fruit trees in an area of the Marikina watershed in Pintong Bocaue, San Mateo, Rizal.



• Planted 873,070 mangroves along the coastal areas of Semirara Island from 2000 to 2015. Of the total mangroves planted, around 529,800 survive.


• Conducts progressive rehabilitation of Panian Mine through the reforestation of its surrounding areas, roughly covering more than 624 hectares


For its reforestation program, the company mainly uses beach aguho (Casuarina equisetifolia), a fast-growing and nitrogen-fixing species of the she-oak. This is to prepare the reforested areas for the final phases of rehabilitation.


• Members of the Semirara Marine Hatchery Laboratory regularly gather broken-off fragments of various species of corals in the reefs of Semirara Island and reseed these in the Tabunan marine sanctuary


In 2015, the facility reseeded 309 pieces of transplanted corals.



• Planted 15,000 mangrove propagules in selected locations in Mobo and Masbate City in the Province of Masbate

• Procured 8,000 mangrove propagules for distribution to the host communities and other stakeholders, in line with the Mobo local government unit’s efforts to prevent sea shore erosion


• Maintains and monitors two rehabilitation projects with a total land area of 6.8 hectares. Some of the plants used to rehabilitate the area are the Vetiver grass, (Chrysopogon zizanioides), Kudzu (Pueraria montana), Wild Daisy (Acmella grandiflora) and Australian Peanut. These species are groundcover plants, which prevent topsoil erosion and surface run-off.

• Aside from these two rehabilitation projects, the company also rehabilitated another 12 hectares of land in Barangay Berong as part of the National Greening Program (NGP) of the DENR. With the additional 12 hectares, BNC’s total rehabilitated area under NGP since 2008 is 133.42 hectares.

The company also donated 12,176 assorted seedlings to NGP partners in 2015.

• Maintains a two-hectare seedling nursery facility with around 241,480 seedlings available at the end of 2015. The nursery has various forest, fruit, pioneering and native trees, as well as an assortment of groundcover, ornamental and herbal plants.

• Constructed water management structures and reinforcements along gullies and creeks to mitigate any potential negative impact of the company’s mining operation on the bodies of water in Berong. Almost 8,000 meters of geotextile cloth and over 1,100 meters of check dams were installed during the year to act as a filter system for silt-laden runoff water.

• Operated a 3.5-hectare rice paddy field and maintains a tilapia fish pond to serve as bio-indicators of mining impacts on water and soil quality in the community. In 2015, the company harvested 386 sacks of rice from the paddy field, proving that the company’s operations have no negative effect on local farming. Tilapia fish are also regularly harvested from the company-maintained fish pond.

• Actively participates in different environmental activities in partnership with concerned government agencies and stakeholders

One of which is the continuous care, maintenance and improvement of all environmental structures inside and outside of the mining tenement and port area to meet the company’s main goal of “Zero Discharge” to lowland and nearby environment.

• Contributed in the conduct of biodiversity and mangrove assessment, in partnership with DENR Regional Office and LGUs, as part of the protection and conservation efforts in Uacon lake located at Brgy. Uacon in Candelaria, Zambales through the Uacon Lake Management Project


• Spearheads regular tree-planting activities at the Ipo watershed during rainy season (from June to December). The company aims to plant 50,000 trees every year to protect the watershed from further degradation.

Around 65,100 trees were planted in 2015 alone, surpassing the target by 30%. Participating in the tree planting activities were 1,046 volunteers from Maynilad, DENR, NCIP, Norzagaray LGU, Ateneo de Manila - Graduate School, DOLE, BJMP, APO-NCR, Brgy. Batasan Hills, Mabuhay Vinyl, PSBA-Rotaract, UP Interschool Business Association, and Miss Earth Philippines Foundation.

• Planted more than 30,000 mangrove propagules from February to May in two activities to celebrate the 2015 World Water Day. Over 350 volunteers from Maynilad, DENR-PENRO Cavite, JCI Manilena/Manila, PNP Maritime Group, Miss Earth Philippines Foundation and the local communities in Kawit, Noveleta, Rosario and Bacoor City worked together to achieve the milestone.