Aggregate Mining.
Established low development potential
Overview.
Marine-based aggregate mining plays a critical enabling role in national development across Southeast Asia, supplying essential materials for construction, housing, transport, land reclamation, and coastal protection. As a high-volume, low-value sector, it supports infrastructure growth and local livelihoods but simultaneously generates significant environmental pressures, community conflicts, and regulatory challenges. The accelerating demand for sand, gravel, and other marine aggregates intensifies pressures on coastal ecosystems, heightens risks of erosion and habitat loss, and exposes governance gaps as competing uses of ocean space become more complex.
Across the region, extraction practices and regulatory systems vary widely, with some countries grappling with ecological harm, policy uncertainty, and difficulties in monitoring offshore activities. Indonesia’s shifting regulatory position on sea sand exports, Malaysia’s stringent approval processes, and Viet Nam’s tightening controls in response to erosion and subsidence illustrate the diversity of national approaches and the underlying tensions between economic development and environmental protection. Transparency remains a persistent challenge as vessel tracking gaps limit effective oversight, while scholars and regional assessments highlight the need for institutional strengthening, comprehensive policies, stakeholder participation, and improved monitoring to align extraction with sustainability goals and community wellbeing. Emerging pathways such as substitution with manufactured or recycled materials signal growing recognition of the need to reduce pressure on natural systems.
Within this wider sustainability and governance landscape, aggregate mining intersects with coastal protection, construction, logistics, environmental management, and marine biodiversity because sediment systems, coastal infrastructure, and supply chains are tightly interconnected. These cross-sector dynamics shape erosion patterns, habitat conditions, and community resilience, while advancing circular economy opportunities through material substitution, recycling, and improved monitoring systems that safeguard long term coastal stability and minimise the ecological footprint of marine-based extraction across ASEAN.
Explore how Aggregate Mining is positioned for each of the
Blue Economy Capitals.
Financial Capital.
Financial Capital.
Marine based aggregates, especially sea sand and near shore seabed materials, have become a conduit for infrastructure finance in Southeast Asia because persistent demand for dredged fill supports multiyear capital programs for ports, reclamation, and coastal defences. Globally, best available estimates indicate that about six billion tons of sediments are dredged from marine environments each year and Southeast Asia is identified as a hotspot for this activity, a scale signal that underpins investment in dredging fleets and marine logistics while heightening environmental and governance risks (UNEP, 2023; UN News, 2023).
Capital typically enters this chain through project and offtake finance tied to multi-phase reclamation and terminal works, and through trade linked receivables anchored by steady importer demand. One durable demand anchor is Singapore, which in 2023 imported on the order of one hundred eighty four to two hundred twenty six million US dollars of natural sands corresponding to roughly twenty seven to thirty billion kilograms depending on HS sub code, volumes that directly support receivables and working capital programs for regional suppliers (WITS, 2023; Observatory of Economic Complexity, 2025). The same demand is linked in policy and industry reporting to long-running reclamation and port expansion cycles such as the Tuas program, creating multiyear offtake visibility for financiers and contractors (MPA Singapore, n.d.; Begum, 2023). Singapore imported USD 42.043 million of silica and quartz sands in 2023 (about 2.87 billion kg) and USD 242.645 million of pebbles, gravel, shingle, and flint (about 20.28 billion kg), underscoring the scale of cashflows tied to construction supply security (WITS, 2023). On the export side, Cambodia shipped USD 97.09 million of natural sand in 2023 (around 13.87 billion kg), while academic estimates suggest extraction reached 59 million tonnes in 2020, highlighting significant economic rents and governance challenges (WITS, 2023; Hackney et al., 2021).
Indonesia offers a clear case of how regulation reprices risk and shapes capital access. In May 2023 it reopened sea sand exports via Government Regulation No. 26/2023 and the Ministry of Trade subsequently operationalised the regime with Permendag 20/2024 and Permendag 21/2024 (Muthiariny, 2023; Global Trade Alert, 2024; Idris, 2024). The government set a benchmark export price of about USD 11.49 per cubic meter and by September to October 2024 around 66 firms had applied for sea sand utilisation or export permits, parameters that directly feed into sponsors’ revenue models and lenders’ bid security design (Yunus, 2025; Ayuningrum, 2024; Ferdianto, 2024).
In the Philippines, Manila Bay seabed quarry projects disclose technical scope and capital costs through government Environmental Impact Statement filings, providing bankability benchmarks for reclamation supply, with offshore marine aggregates operations reporting project costs ranging from hundreds of millions to around one billion Philippine pesos (DENR‑EMB, 2021). A separate Manila Bay seabed quarry proposal by Silverquest Mining Resources, Inc. indicates a multiyear dredging, transport, and material supply operations supporting large-scale reclamation works (DENR‑EMB, 2021). Social license and community risk are material considerations, as fisherfolk and environmental groups have brought Manila Bay seabed quarrying to international attention and documented impacts on livelihoods and marine ecosystems, pressures that can limit access to international capital and increase regulatory and compliance costs (Gutoman, 2025).
Other ASEAN markets provide regulatory and liquidity signals that shape financing terms, with Thailand’s mining framework offering clear indicators on project scale and revenue structure through publicly available licensing and fiscal rules. Official guidance under Thailand’s Minerals Act and its implementing ministerial regulations indicates that mining and sea concessions can be issued at a scale sufficient to support long‑life operations, while royalty rate baselines are defined through ministerial regulation and applied in state take and revenue‑sharing models used by lenders and investors (Department of Primary Industries and Mines, 2017; Chandler Mori Hamada, 2024).
Viet Nam’s Decree No. 23 of 2020 establishes the regulatory framework for riverbed and estuarine sand and gravel extraction, including auction‑based licensing and operational controls that shape costs at the river‑to‑marine interface (Government of Viet Nam, 2020). In parallel, monitoring initiatives led from Singapore have demonstrated satellite‑enabled methods to quantify sand mining intensity across major river systems, strengthening portfolio oversight, compliance verification, and risk management for lenders (Park, 2024; Tan, 2024).
For smaller ASEAN economies, financial signals are clearest through trade. Lao PDR exported about USD 10.8 million of gravel and crushed stone in 2023 (OEC, 2023), while Brunei Darussalam imported roughly USD 4.12 million of similar materials, reflecting construction-linked market financing where royalty data are less consolidated (OEC, 2023). In Myanmar, publicly consistent finance statistics remain limited, but trade data still capture activity, reinforcing the importance of transparent mineral information systems for effective financial governance (WITS, 2023).
Overall, ASEAN sand and aggregates finance is driven by long‑term reclamation demand anchored by Singapore and shaped by regulatory clarity. Where pricing, licensing, and monitoring are clear, capital flows more predictably; where governance and social‑license risks persist, financing costs rise despite strong trade demand.
Physical Capital.
Physical Capital.
Marine and riverine aggregate extraction in Southeast Asia is anchored in a substantial capital stock of dredgers, pumps, conveyors, and barges that operate continuously on large rivers and in coastal waters. In the Lower Mekong, researchers warn the impact of massive sand removal activities, a scale reflected in the density of dredging fleets and barge traffic and in observable changes to channel morphology (University of Southampton, 2025). Recent peer reviewed hydrometric work shows that sand mining has lowered the Mekong main stem bed and reduced Tonle Sap Lake’s monsoon reverse flow by about forty to fifty percent since 1998, with further declines projected if extraction continues, directly affecting navigation windows and reliability of fluvial transport that supports regional trade (Park, 2024; Liliansa, 2024).
In the ASEAN marine and river aggregate sector, shore side operations typically depend on river landings, floating transshipment pontoons, stockpile yards, and washing or screening plants to condition raw materials for concrete and reclamation fill (Buana Intertrans, n.d.; Habco Indonesia, n.d.; EPD Sabah, 2022). On inland waterways, an Indonesian industrial case study describes barges moving bulk material from a riverside stockpile to a transshipment facility where floating cranes load mother vessels, which mirrors aggregate logistics (Pramudita & Masruroh, 2024). In parallel, Indonesian logistics providers openly market river tug barge services, transshipment, and stockpile management for bulk commodities including sand, demonstrating available landings and intermediate stockpiles along key rivers (Buana Intertrans, n.d.).
When shoreside berths are limited or drafts are shallow, operators deploy floating transshipment pontoons and floating cranes offshore. In South Kalimantan, a Floating Loading Facility integrates screening, size filtering, and weighing during ship to ship transfers, functioning as a floating processing and transshipment platform (Habco Indonesia, n.d.). Regional providers advertise integrated offshore transshipment with floating cranes and loading facilities across Indonesia and Southeast Asia, while established barging firms combine barging with floating crane transshipment, which is the same logistics stack used for aggregates (ARK Transshipment, n.d.; MBSS, n.d.).
Downstream, stockpile yards buffer and condition supply ahead of end use. Malaysian operators highlight strategic sand stockpiling for construction, reclamation, and export operations, and integrated groups couple sand mining with building materials distribution and logistics, which evidences yard and inventory infrastructure (TGS Mining, n.d.; SRH Group, n.d.). To meet concrete specifications, producers run washing and screening plants; for example, INSEE Aggregates describes advanced crushing and sand washing that align with ASTM C33, and Sabah’s environmental SOPs codify processing and compliance for river sand and stone mining sites (Siam City Cement, 2023; EPD Sabah, 2022). This conditioning also supports reclamation fill workflows, as the Philippines Limay seabed quarry filing explicitly links marine mined aggregates to large reclamation demand, and some routes even perform on vessel screening during transshipment via the Floating Loading Facility (Environmental Management Bureau Philippines, 2021; Habco Indonesia, n.d.).
Across ASEAN, physical-capital development in the aggregates sector shows distinct national patterns. On the demand node, Singapore underpins regional flows with strategic stockpiles and dedicated receiving points that act as buffers during supply shocks, context for sand intensive port expansions such as Tuas Mega Port which rely on phased delivery and handling capacity (World Port Sustainability Program, n.d.). These facilities integrate with ground improvement equipment such as hydraulic fill placement systems and densification rigs that must be scheduled to the cadence of barge arrivals and stockpile turnover, linking marine logistics to onsite civil works capacity. Indonesia is expanding offshore extraction under a 2024 decree designating seven sea-dredging zones covering about 590,000 hectares, potentially allowing up to 17 billion m³ of sea sand extraction and requiring major dredging, logistics, and monitoring capacity (Ambari & Sahputra, 2025; Bioantika & Octaviano, 2025). Viet Nam is shifting from river mining toward manufactured and recycled sand, targeting a 40% substitution of natural sand by 2030 (Viet Nam News, 2023; ASEM Connect, 2023). Mekong Delta assessments showing extraction of 35–55 million m³ annually against inflows of only 2–4 million m³ highlight the urgency of developing alternative aggregates (Pedroletti & Surprenant, 2025). Cambodia extracted an estimated 59 million tonnes of sand in 2020, indicating strong dependence on dredging fleets, river transport, and enforcement systems across the Lower Mekong (Cowan, 2025; Quan et al., 2025). The Philippines maintains a sizable extraction and processing base, with 242 industrial sand-and-gravel and 115 plant permits as of 2022, and 2024 regional output of nearly 5 million m³ of sand and gravel plus 2.56 million tonnes of limestone (Moon, 2024; Willet, 2024). Lao PDR exported 132.7 million kg of aggregates to Thailand in 2023, showing efficient quarry-to-border logistics (WITS, 2023). Brunei Darussalam imported 625 million kg of aggregates in 2019, largely from Malaysia, while Myanmar imported 36.6 million kg from China in 2023, reflecting continued regional trade despite limited domestic data (WITS, 2019; 2023).
Human Capital.
Human Capital.
Across ASEAN, human-capital capacity in aggregate mining is reflected in national mining and quarrying employment data. Indonesia hosts the largest labour base, with about 1.66 million workers employed in 2023 (1.2% of total employment), forming the core workforce for quarrying, haulage, crushing, and supervision (Chung, 2025). Viet Nam’s mineral sector employed 196,000 people in 2022, up from 175,100 in 2021, indicating a growing pool supporting construction-mineral supply chains (Moon, 2024). Malaysia reported 65.6 thousand persons engaged in mining and quarrying in 2022, including 35.6 thousand in the mineral-mining sub-sector. Semi-skilled workers made up 53.1% of the workforce, reflecting both capability depth and retention potential (Department of Statistics Malaysia, 2024).
In Thailand, 12,266 workers were employed in mining in 2023, mainly across 4,682 active limestone-construction mines, showing a highly distributed base of small-to-medium operations reliant on routine quarrying skills (Department Primary Industries and Mines, 2024). The Philippines employed 206,000 people in mining and quarrying in 2022, supported by 242 industrial sand-and-gravel permits and 115 processing-plant permits, explaining the broad dispersion of quarry employment (Moon, 2024). Cambodia’s mining and quarrying workforce was around 6,500 (2019), with 260 licenses issued for sand, gravel, and crushed stone extraction (Moon, 2022). Among the remaining ASEAN Member States, consistent data are limited: Myanmar had an estimated 118,000 mining workers (2019), Lao PDR about 15,381 (2014), while Singapore and Brunei Darussalam report primarily on regulation and infrastructure rather than workforce counts (Moon, 2024; Fong-Sam, 2018).
Social Capital.
Social Capital.
Aggregate mining is increasingly treated as a regional sustainability and governance issue for rivers, estuaries, and offshore systems rather than a purely domestic quarrying matter (ASEAN, 2025). The ASEAN Minerals Development Vision to 2045 and AMCAP IV 2026–2030 stress governance, investment‑quality data, workforce skills, and digital oversight across the minerals value chain including high‑volume construction materials (ASEAN, 2025a, 2025b). Ministers adopted the Vision and AMCAP IV at the Tenth ASEAN Ministerial Meeting on Minerals, reinforcing links to the ASEAN Community Vision and the AEC Strategic Plan (ASEAN, 2025c; ADB SEADS, 2025). Regional engagement has also deepened via the ASEAN Mining Conference 2024 in Bali which convened 18 sessions with 50 speakers to advance responsible sourcing, including for marine and riverine aggregates (ASEAN, 2024; ASEAN Mining Conference, 2024).
Transparency and multi stakeholder oversight are being applied to subsectors with major river and coastal footprints. Indonesia achieved 67 points in its 2024 EITI Validation, reflecting progress in routine disclosure on licences and revenues that underpins trust across government, industry, and civil society (EITI, 2024a, 2024b). The EITI International Secretariat also highlights Indonesia’s systematic disclosures and areas for improvement relevant to environmental and contract transparency that intersect with aggregate governance (EITI, 2024, 2026). The Philippines has one of the region’s most institutionalised mechanisms through PH EITI, chaired by the Department of Finance; documentation shows the 100th MSG meeting on June 19, 2025, marking a decade of structured, multi‑sector dialogue supporting accountability for quarry and aggregate oversight (Department of Finance, 2025; PH‑EITI, 2025; n.d.).
Members are strengthening regulatory tools and environmental assessment for water-based aggregates. Cambodia’s National Policy on Mineral Resources 2018–2028 embeds transparency and licensing principles for construction materials, while USGS country reporting details sector context requiring coordination among regulators, operators, and communities (Royal Government of Cambodia, 2018; Moon, 2024). Malaysia’s Sabah Environmental Impact Assessment Guideline for River Sand and Stone Mining standardises licensing, mitigation, and monitoring to reduce erosion and downstream impacts in sensitive river systems (EPD Sabah, 2012, 2023).
At the regional scale, trade interdependence heightens the need for aligned environmental standards in river and marine sand supply chains. Singapore imported about 30.3 billion kilograms of natural sands in 2023, overwhelmingly from Malaysia, and also drew very large stone aggregate volumes from Indonesia and Malaysia, illustrating how downstream markets depend on upstream extraction practices and governance in neighbouring water systems (WITS, 2023a, 2023b, 2023c). Lao PDR exported roughly 944 million kilograms of HS 2517 aggregates to Thailand in 2023, while Myanmar imported about 19.9 million kilograms of natural sands mainly from Thailand with smaller volumes from China, underscoring cross border connectivity and shared environmental risk in river basins (WITS, 2023a, 2023b). Against this backdrop, the ASEAN Mining Conference 2024 has begun to provide the bridging governance needed to connect national regulators, industry, and communities on responsible sourcing of marine and riverine aggregates as a collective ASEAN priority (ASEAN, 2024; Indonesian Mining Association, 2024).
Natural Capital.
Natural Capital.
In the early stages of natural capital management, aggregate mining from rivers and nearshore seas across the ASEAN region operates within fragmented frameworks with limited oversight and coordination among mining, water, fisheries, and coastal authorities. This exposes ecosystems to unmanaged cumulative impacts, leading to unquantified or unmitigated environmental effects like riverbed incision, altered sediment transport, turbidity increases, shoreline erosion, and habitat loss (UNEP, 2022). These consequences affect biodiversity and ecosystem services in Asian river basins and deltas (Koehnken & Rintoul, 2018; Hussain et al., 2022). Informal and illegal extraction further elevates risks to mangroves, coral systems, groundwater linked wetlands, and livelihoods, especially in coastal cities and growth corridors with low enforcement capacity and high demand (UNEP, 2022; Ali et al., 2024).
As awareness of environmental risk grows, initial measures to monitor and mitigate impacts are introduced, including licensing conditions, extraction limits, environmental impact assessments, and basic site-level monitoring requirements that link operations with ecosystem considerations (Hussain et al., 2022). Pilot efforts to assess sediment budgets, water quality, and habitat status inform decisions and respond to degradation hotspots in riverine and nearshore systems (Koehnken & Rintoul, 2018). However, implementation remains reactive and uneven, often triggered by visible ecosystem damage or social conflict rather than proactive basin or seascape planning (Ali et al., 2024; UNEP, 2022).
As maturity increases, the sector adopts structured resource management practices and environmental safeguards, guided by spatial planning that considers river morphology, sediment replenishment, connectivity to deltas and coasts, and sensitive habitats (UNEP, 2022). Monitoring systems track hydrological change, biodiversity, and cumulative effects to support adaptive management, while operations are conditioned on sediment and ecological baselines (Koehnken & Rintoul, 2018; Hussain et al., 2022). Restoration actions, including recontouring, bank stabilisation, and mangrove and seagrass recovery, are incorporated into management plans, supported by better coordination among agencies (Ali et al., 2024).
In the mature scenario, comprehensive systems for managing natural resources and environmental impacts are operational, reinforced by regional collaboration and shared accountability (UNEP, 2022). Extraction aligns with basin-wide sediment management and marine spatial planning, maintaining sediment continuity, protecting habitats, and sustaining fisheries and flood regulation (Koehnken & Rintoul, 2018). Data sharing, harmonised standards, and joint monitoring support adaptive management, while governance frameworks integrate community participation and scientific evidence to reduce risk and improve compliance (Ali et al., 2024). Regenerative and nature-positive principles, such as eco-engineering, habitat restoration, and responsible alternatives to natural sand, aim to achieve net environmental benefits and enhanced climate resilience for coasts and deltas (UNEP, 2022; Danish et al., 2025).
Assessment of Capacity for Growth
Assessment of Capacity for Growth
CONSTRAINED
Low or no growth in production
ASEAN’s aggregate mining sector, covering sand, gravel, crushed stone, limestone, and construction materials, faces constraints on further growth due to ecological pressure, regulatory tightening, and finite natural replenishment rates (ASEAN, 2023; UNEP, 2019). Riverine and coastal sand systems are heavily exploited, with major basins like the Mekong exceeding natural sediment inflows. Recent studies show significant sediment deficits driven by riverbed extraction and upstream regulation (Jordan et al., 2019; WWF, 2018; Park, 2024). Expanding output through higher extraction volumes is unsustainable and politically unviable, leading to moratoria, export restrictions, court challenges, and stricter licensing and environmental controls in parts of Southeast Asia (Szabó, 2023; Haq et al., 2023).
To address these constraints, ASEAN governments are focusing on governance reform, substitution, and efficiency gains. Policy responses include shifting away from river sand to manufactured and recycled aggregates, strengthening environmental impact assessment requirements, improving mineral information systems, and tightening enforcement against illegal mining (ASEAN, 2021; Makul et al., 2021; DOE Malaysia, 2024; EPD Sabah, 2022). Import‑dependent economies are reinforcing logistics and monitoring (and, where applicable, stockpiling) rather than pursuing domestic extraction; Singapore’s reliance on regional imports and the rise of monitoring technologies illustrate this shift (Szabó, 2023; Tan, 2024).
Future growth in the aggregate sector will come from better management of existing resources, improved material efficiency, recycling, and regional coordination rather than higher extraction volumes (ASEAN, 2023; UNEP, 2019). ASEAN’s aggregate mining sector is best characterised as production constrained but development active, with growth potential in sustainability, substitution, digital monitoring, and supply‑chain optimisation rather than higher extraction volumes (ASEAN, 2023; UNEP, 2019).
These dynamics shape ASEAN’s emerging Blue Economy. As terrestrial and riverine systems face ecological limits and governance scrutiny, interest shifts to ocean-based resources, including aggregate mining and other ocean-based mining such as DSM (ASEAN, 2023). The pressures, governance gaps, and sustainability debates in aggregate mining offer lessons for ASEAN’s approach to future deep sea mining, emphasising precaution, transparency, strong environmental baselines, and long-term ecosystem stewardship (UNITAR, 2024; March et al., 2025).
