Construction aggregates & industrial minerals
Solid ground for every build.
Construction aggregates and industrial minerals from General Santos City: quarried at our own permitted source on the Buayan Riverbed, sourced through vetted partners, and documented on every delivery.
Own permitted quarry · Buayan Riverbed, General Santos City
- Own permitted source on the Buayan Riverbed
- Vetted partner network
- Specification-led supply
- Compliance built in
Materials
Four core materials. One clear inquiry process.
Availability, source, specification, quantity, documentation, price, and delivery terms are confirmed for each request. Tell us the intended use and the requirement the material has to meet.
Trade partners
Limestone
Crushed and sized limestone for construction and industrial use, including coralline limestone from the Sarangani coast. Supplied for emission control in coal-fired plants, skim coat and tile adhesive production, and general construction.
Details to include
- Intended use
- Size or specification
- Quantity
- Delivery location
Own source + partners
Sand
Washed sand and washed vibrosand for concrete, masonry, plastering, and construction works within power facilities, where clean, consistent fines matter. State the intended use so the right grading is supplied.
Details to include
- Intended use
- Type or grading
- Volume
- Delivery schedule
Own source + partners
Gravel
Washed gravel and crushed aggregates in the sizes concrete, asphalt, road base, and structural foundations call for. Provide the aggregate size or gradation and the quantity your project needs.
Details to include
- Size or gradation
- Quantity
- Delivery location
- Target date
Power plant source
Fly ash
Coal fly ash from power plant operations in Sarangani Province, for cementitious and industrial use. Bulk pneumatic tanker loads or 40 kg bags; class and technical data are confirmed before quotation.
Details to include
- Intended use
- Required class or specification
- Quantity in tonnes or bags
- Bulk or bagged delivery
Where the material comes from. Sand and gravel are produced at the company's permitted extraction site on the Buayan Riverbed and supplemented from trade partner sources when a request calls for it. Limestone is sourced through established partners in the region. Fly ash comes from coal-fired power plant operations in Maasim, Sarangani Province, in bulk pneumatic tanker loads of about 40 metric tonnes (1,000 bags of 40 kg) or bagged. Source documentation and technical data are confirmed before quotation. Units are quoted per request: metric tonne, cubic metre, bag, or truckload.
Product lines
From riverbed to ready for the mix.
Six product lines, each matched to the application it is bought for. Quantities are supplied by the truckload, cubic metre, or metric tonne, and recurring supply can be scheduled against a project programme.
Coal power plantsSkim coatTile adhesive
Crushed limestone
Finely crushed limestone for emission control in coal-fired plants and as a key ingredient in smooth skim coats and strong tile adhesives.
BridgesRoadsBuildings
Washed sand and gravel
Clean, graded aggregates that give concrete mixes their strength, stability, and durability on infrastructure and building projects.
Asphalt layingFoundationsRoad base
Crushed aggregates
Crushed stone in the sizes asphalt production, structural foundations, and heavy-traffic pavements call for.
Coal power plantsPower supply infrastructure
Washed vibrosand
Fine, vibrated, thoroughly washed sand for construction works within power facilities, where clean and consistent fines are required.
Concrete plantsCementitious blends
Coal fly ash
Class-confirmed fly ash from power plant operations in Sarangani, delivered plant to plant in 40-tonne pneumatic tankers or in 40 kg bags.
Site preparationLand development
Earthfill and earthfilling services
Supply and placement of soil and fill materials to level land, backfill excavations, and prepare construction sites for development.
How buyers specify
By size and grading
Nominal aggregate size or gradation, sand fineness, or the limestone sizing the application needs, in the terms your engineer or mix design uses.
By class and chemistry
For fly ash and industrial limestone: the class, loss on ignition, fineness, or chemistry limit the receiving plant works to, confirmed with source data before quotation.
By volume and rhythm
Cubic metres, metric tonnes, or truckloads, one-time or recurring. Weekly and monthly call-offs are scheduled against the project programme.
What to send us
A better quotation starts with complete requirements.
- Material and intended use
- Grade, size, or technical specification
- Quantity and unit
- Delivery location
- Required date and order frequency
Also name any reports or tests your specification requires, such as a sieve analysis, a certificate of analysis, or weighbridge tickets for bulk fly ash, so the documentation is confirmed before you order. Not sure about a field? Share what you know and mark the rest for discussion.
How it works
From requirement to coordinated supply.
The process is the same whether the material comes from the company's own quarry or a partner source, for a single truckload or a recurring plant-to-plant contract.
Send the requirement
Material, specification, quantity, site, and schedule, through the website form, email, phone, or Viber.
Source matching
The request is checked against the company's own quarry output and the partner source that meets the specification.
Quotation and terms
Material details, documentation, price, and logistics terms are confirmed in writing.
Delivery and receipting
Supply and delivery are coordinated with the parties involved; every load is receipted and every billing invoiced.
What a quotation confirms
- Availability and the source of the material
- Specification, grading, class, or chemistry met
- Documentation available from the source
- Price for the quantity; delivery or pick-up terms
- Schedule and, for recurring supply, the rhythm
Documentation that can be requested with an order
Delivery receipt and sales invoice
BIR-registered forms issued per delivery; weighbridge tickets for bulk fly ash.
Technical data
Material description, grading, class, or chemistry from the source for the quoted lot.
Test documents
Where the source can provide them; confirmed per material and source before acceptance.
Who we serve
Built for project and procurement teams.
From coal-fired power plants to family homes, the service is designed for buyers who specify materials by grade, quantity, and schedule, and who need the supply side to answer in the same terms.
Contractors and infrastructure teams
Aggregate requirements for site, road, and structural works.
Concrete, cement, and materials businesses
Bulk limestone, sand, gravel, and fly ash inputs for production.
Industrial and processing facilities
Process and plant material requirements, including documentation needs.
Property and project procurement teams
Multi-material inquiries coordinated against project schedules.
Industries served
Coal-fired power plants
Limestone for emission control, vibrosand for plant works, fly ash offtake.
Major infrastructure
Roads, bridges, and public works: aggregates, base, and fill by programme.
Commercial developments
Concrete aggregates and site fill for complexes and facilities.
Residential construction
Washed sand, gravel, and earthfill for subdivisions and homes.
Where we operate. The company is based in General Santos City, South Cotabato, with its extraction site on the Buayan Riverbed in Barangay Batomelong. Deliveries cover General Santos City, Sarangani, South Cotabato, and the wider SOCCSKSARGEN region. Bulk fly ash moves from Maasim, Sarangani Province, to concrete plants in the Davao region; other destinations are assessed per inquiry.
What we stand for
Quality you can specify. Reliability you can schedule around.
We do more than deliver material. Every load is sourced, checked, and documented to the requirement it has to meet, because the projects we serve, from power plants to family homes, are built to last.
Vision
To be the leading and most trusted supplier of construction aggregates, industrial minerals, and earthfilling services in Southern Mindanao, supporting large- and small-scale construction and infrastructure with excellence, reliability, and integrity.
Mission
To deliver top-tier construction materials and sustainable services that support the growth of private and government infrastructure: strong, durable foundations for coal-fired power plants, roads and bridges, commercial complexes, and residential communities, with quality, reliability, and environmental responsibility at the centre of every order.
Quality objectives
Consistent product quality
Strict quality control at the source and on dispatch, so every material and aggregate meets or exceeds the specification it is sold against.
Timely delivery
Smooth transactions, prompt updates, and deliveries that keep client project timelines intact and reduce the risk of delay.
Customer satisfaction
Reliable service, responsiveness, and fair value, monitored through client feedback and improved on continuously.
Safety and compliance
Full compliance with safety standards and regulations in every aspect of operations, reducing workplace incidents and environmental risk.
Continuous improvement
Regular evaluation of products, equipment, processes, and staff capability to raise service quality across operations.
Long-term client relationships
Trust built through integrity, dependable after-sales support, and transparent communication.
Environmental responsibility
Responsible extraction and waste management under the ECC, reducing environmental impact and keeping operations sustainable.
Build a solid foundation of your future with us.
Our founding promise, and still the standard every delivery is measured against: the right material, at the right specification, on the schedule your project runs on.
Who we are
Aggregates and industrial minerals, supplied the right way.
Stone Depot Trading supplies limestone, sand, gravel, crushed aggregates, coal fly ash, and earthfill to coal-fired power plants, infrastructure contractors, concrete and cement producers, and commercial and residential builders across SOCCSKSARGEN and the Davao region.
Behind the trading name is StoneDepot Sand and Gravel Supplies, a BIR-registered sole proprietorship based in General Santos City that operates its own permitted industrial sand and gravel source on the Buayan Riverbed in Barangay Batomelong. The Buayan Riverbed project has held a DENR-EMB Environmental Compliance Certificate since 2018, and today runs under a five-year City quarry permit and a current Mayor's Business Permit.
Own quarry output is combined with a vetted network of trade partner sources for limestone, fly ash, and additional volume, so a single inquiry can cover several materials and every order is matched to the source that actually meets its specification. Each requirement is checked at the source, quoted in writing, and delivered with BIR-registered receipts, so buyers can plan, accredit, and audit with confidence.
- Registered business name
- StoneDepot Sand and Gravel Supplies (sole proprietorship)
- Owner and proprietor
- Christopher Joy Dela Serna Andulana
- Registered address
- Purok 1, Barangay Batomelong, General Santos City 9500, South Cotabato
- Extraction site
- Buayan Riverbed, Barangay Batomelong · City Quarry Permit No. 025 · 4,190 cu. m per year
- Environmental compliance
- ECC-OL-R12-2025-0192, DENR-EMB Region XII, amending the project's 2018 ECC
- Line of business
- Sand and gravel quarrying (PSIC 08105), processor, with B2B supply of limestone, sand, gravel, crushed aggregates, fly ash, and earthfill
Extraction and loading
4,190 m³ / year
Permitted extraction volume on the Buayan Riverbed under City Quarry Permit No. 025, with a backhoe, payloader, and dump truck declared for the site.
Batomelong · General Santos City
- 2018Buayan Riverbed project under DENR-EMB environmental compliance since
- 4,190 m³/yrPermitted extraction on the Buayan Riverbed
- 6Product lines: limestone, sand, gravel, crushed aggregates, fly ash, earthfill
- 40 MTStandard bulk fly ash tanker load, about 1,000 bags of 40 kg
What the company stands on
Own permitted source
Industrial Sand and Gravel Quarry Permit No. 025 covers up to 4,190 cu. m per year from the Buayan Riverbed, loaded and hauled with the company's own backhoe, payloader, and dump truck.
Vetted partner network
Limestone, fly ash, and additional sand and gravel volume are drawn from established sources in the region, so one inquiry can cover several materials from the right origin each.
Specification-led
Availability, source, specification, quantity, documentation, price, and delivery terms are confirmed in writing for every request. Buyers get a quotation they can hold us to.
Compliance built in
The quarry operates under ECC-OL-R12-2025-0192 from DENR-EMB Region XII and a current Mayor's Business Permit, is registered for excise tax on mineral products, and issues BIR-registered receipts and invoices.
Christopher Joy Dela Serna Andulana
Owner and proprietor
Before establishing Stone Depot, Mr. Andulana served as Environmental Management Specialist II at the EIA Section of DENR-EMB Region XII, evaluating ECC and CNC applications as a case handler. He continues as an EIA preparer and consultant with EnviSoul Environmental Consultancy Services. That regulatory background is why the quarry is permitted, documented, and run the way it is.
Registrations and compliance
Registered, permitted, and on record.
The instruments below establish the company's identity, its licence to operate, its right to extract, and its environmental compliance. Copies are provided on request and with every accreditation submission.
| Instrument | Reference and scope | Issuing office | Date and validity |
|---|---|---|---|
| Certificate of Business Name Registration | StoneDepot Sand and Gravel Supplies · Business Name No. 7138306 · regional scope, Region XII (SOCCSKSARGEN) | Department of Trade and Industry | Issued 10 May 2025 · valid to 10 May 2030 |
| Certificate of Registration (BIR Form 2303) | Head office · single proprietorship · sand and gravel quarrying (PSIC 08105) · non-VAT · income tax, percentage tax, excise tax on mineral products | Bureau of Internal Revenue, RDO No. 110, General Santos City | Registered 10 June 2025 |
| Mayor's Business Permit | Mayor's Permit No. 12619-0 · permit year 2026, renewal · sand and gravel quarrying (B08105), processor; delivery vehicle, more than 6 wheels | Office of the City Mayor, General Santos City | Issued 31 March 2026 · expires 31 December 2026 |
| Authority to Print: Delivery Receipt and Sales Invoice | ATP No. 110AU20250000003590 · Delivery Receipts and Sales Invoices, non-VAT · Notice to Issue Receipt/Invoice posted at the establishment | Bureau of Internal Revenue, RDO No. 110 | Issued 10 June 2025 |
| Industrial Sand and Gravel Quarry Permit | Permit No. 025 · Quarry Identification Number 118 · Purok 1, Barangay Batomelong · 4,190.00 cu. m per year · backhoe, dump truck, payloader | Office of the City Mayor, City of General Santos | Issued 25 September 2025 · expires 25 September 2030 |
| Environmental Compliance Certificate | ECC-OL-R12-2025-0192, amending ECC-OL-R12-2018-0011 · Industrial Sand and Gravel Project, Buayan Riverbed, Barangay Batomelong · Presidential Decree No. 1586 | DENR Environmental Management Bureau, Region XII | Issued 29 July 2025 · original ECC 2018 |
Source and operations
A permitted sand and gravel source on the Buayan Riverbed.
The company's extraction site lies on the Buayan Riverbed in Barangay Batomelong, General Santos City, under a City Government Industrial Sand and Gravel Quarry Permit and a DENR-EMB Region XII Environmental Compliance Certificate the project has carried since 2018.
How the site is run
- Extraction stays within the 4,190 cu. m per year volume allowed by the City quarry permit.
- The IEEC mitigation measures are implemented across all phases of the project, as the ECC requires, with periodic DENR-EMB monitoring.
- Mayor's Business Permit No. 12619-0 (2026) is current to 31 December 2026; every employee on site holds a working permit, a condition of both permits.
- Quarry output is covered by BIR registration for excise tax on mineral products; every sale is issued a BIR-registered delivery receipt and sales invoice.
Equipment declared under the 2025 quarry permit
Backhoe
Extraction and loading at the permitted riverbed source.
Payloader
Stockpile handling and truck loading by product line.
Dump truck
Hauling and delivery, more than 6 wheels; every load receipted.
Bulk fly ash, plant to plant
- Source
- Coal-fired power plant operations in Maasim, Sarangani Province; tankers load directly from the ash silos.
- Haulage
- Bulk pneumatic tankers through our haulage partner. A standard load is 40 metric tonnes, about 1,000 bags of 40 kg.
- Weighing
- Weighbridge tickets in triplicate per trip; the receiving net weight is the basis of billing.
- Freight
- Haulage is quoted from a freight matrix indexed to the prevailing diesel pump price, so delivered pricing follows fuel cost transparently.
Supplier accreditation kit
For buyers with an accreditation process, the company provides its completed supplier accreditation form together with the DTI Certificate of Business Name Registration, the BIR Certificate of Registration (Form 2303), the Mayor's Business Permit for the current year, the BIR Notice to Issue Receipt/Invoice with specimen Delivery Receipt and Sales Invoice, the City of General Santos Industrial Sand and Gravel Quarry Permit, the DENR-EMB Environmental Compliance Certificate, and the company profile. Additional documents on a buyer's checklist are discussed per request.
Tax identification and other personal identifiers are provided separately to accredited buyers, not published here.
Tax and invoicing status
- Non-VAT registered sole proprietorship: percentage tax and individual income tax.
- Excise tax on mineral products on quarry output.
- Delivery Receipts and Sales Invoices from BIR-registered booklets; invoices are marked "not valid for claim of input tax".
FAQ
Frequently asked questions
Do you publish a fixed price list?
Pricing depends on the material, specification, quantity, source availability, delivery location, and schedule. Submit the requirement for a project-specific quotation.
Can you source a particular size, grade, or specification?
Yes. Include the required specification in the inquiry. Availability and applicable documentation are checked with the source before quotation.
Can technical or test documents be requested?
Yes. Document requirements can be included in the inquiry. The specific documents available depend on the material and source and are confirmed before an order is accepted.
Where can deliveries be arranged?
Stone Depot is based in General Santos City and delivers across SOCCSKSARGEN. Bulk fly ash is set up for plant-to-plant delivery from Sarangani Province to the Davao region. Other destinations are confirmed per inquiry.
Can I inquire even if some specifications are not final?
Yes. Provide the known requirements and identify which items still need discussion.
Is the company accredited as a supplier?
Registration and permit copies (DTI, BIR, Mayor's business permit, City quarry permit, DENR-EMB ECC) and specimen receipt and invoice forms accompany supplier accreditation submissions. See the Registrations and compliance section.
Request a Quote
Tell us what the project needs.
Share the material, specification, volume, delivery location, and schedule. Stone Depot Trading will match the inquiry against its own quarry output and the appropriate partner source, and come back with a written quotation.
Preparing the requirement? See what to send us — and if a detail is not final yet, note it for discussion.
Why buyers work this way with us
One inquiry, several materials
Limestone, sand, gravel, fly ash, and earthfill can be raised in a single request and matched to the right source each.
Documents confirmed, not assumed
Delivery receipts, technical data, and test documents are confirmed per source before an order is accepted.
Schedule-aware
Target dates and recurring rhythms are part of the requirement from the first message, not an afterthought.
Privacy
Privacy Notice
This notice explains how inquiry details submitted through this website are handled. It is written to support review under Republic Act No. 10173, the Data Privacy Act of 2012, and its implementing rules. Last updated 10 September 2026.
What the quote form collects
Company or organization name, contact person, business email, phone number, delivery location, schedule, and the requirement details you choose to provide.
Why it is collected
Solely to evaluate and respond to your supply or quotation inquiry and to coordinate any follow-up you request. The details are not used for marketing, newsletters, or profiling, and they are not sold.
Who handles it
Stone Depot Trading (registered business name: StoneDepot Sand and Gravel Supplies), of Purok 1, Barangay Batomelong, General Santos City 9500, South Cotabato, Philippines, controls inquiry data. Requirement details may be shared with the relevant trade-partner source only as needed to check availability and prepare a quotation. Form submissions are delivered by FormSubmit (formsubmit.co), a form-relay service that processes them only to send the inquiry email.
How it is protected and kept
The production site is intended to be served over an encrypted (HTTPS) connection, and access to inquiries is limited to the people handling them. Inquiry records are kept while needed to evaluate, respond to, and follow up on the request, and for up to 12 months after the inquiry is closed for business records; they are then deleted.
Your rights
Under the Data Privacy Act you may request access to, correction of, or deletion of your personal data, object to its processing, and raise concerns with the National Privacy Commission. To exercise these rights, contact Stone Depot Trading through the channels published on this website (email: cjandulana@stonedepotph.com).
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