Gold Mining & Mineral Processing Operations
Green Ngoria operates active gold mining concessions in Bondo, Oyugis, Lolgorian, and Taita Taveta in Kenya, alongside established mining assets in Tanzania.
At the centre of our Kenyan mineral processing operations is a small-scale gold processing plant at Nyangoma, Bondo Sub-County, fully approved by the National Environment Management Authority (NEMA/PR/SYA/002).
- Processing Facility
- Bondo CIP/CIL Gold Plant
- Operating Sites
- Bondo · Oyugis · Lolgorian · Taita
- Approval Reference
- NEMA/PR/SYA/002
- Statutory Status
- Stamp Duty Paid & County Permitted
Bondo gold processing plant
A small-scale gold processing plant approved by NEMA for the Bondo Sub-County site in Siaya County. The site is located on Plot L.R. No. Nyangoma/1352 in Bondo Sub-County, Siaya County.
Production at the plant is directed by qualified resident metallurgists and mining engineers. Work on the site is carried out under the Green Ngoria Environment, Health and Safety (EHS) policy, which gives environmental protection and workforce safety priority in every operation.
Environmental performance is an operational prerequisite: our processing philosophy incorporates lined containment bunds, strict cyanide detoxification circuits, and zero hazardous discharge into surrounding waterways.
Regulatory & Licensing Register
- Facility Name
- Bondo gold processing plant
- Concession Location
- Plot L.R. No. Nyangoma/1352, Bondo Sub-County, Siaya County
- NEMA Approval Ref
- NEMA/PR/SYA/002, dated 24 July 2019
- Approving Authority
- Office of the County Director of Environment, Siaya County
- Mining Licences
- Stamp duty on mining licences paid 29 October 2019
- County Operating Permit
- Single Business Permit issued by County Government of Siaya
Copies of statutory NEMA approvals, mining licences, and county permits are maintained on file for investor prequalification.
Gold Mining Sites & Processing Field Records
Authentic high-resolution photographic records from Bondo, Oyugis, and Lolgorian mining sites. Click any photograph to zoom up to 2.5x with full pixel clarity.
Bondo Processing Plant Facility
NEMA-approved small-scale gold processing plant (NEMA/PR/SYA/002) at Nyangoma, Bondo featuring ball mills and CIL tank farm.
Oyugis Gold Vein Extraction
Active gold quartz vein mining, excavator loading, and gravity concentration sluices in Oyugis, Homa Bay County.
Lolgorian Shaft Headframe
Underground quartz reef shaft headframe and ore cart haulage in the historic Lolgorian gold belt (Trans-Mara, Narok County).
Ball Mill Mechanical Mounting
Milling & grinding circuit installation on reinforced concrete plinth at Bondo processing facility.
CIL Leach Agitation Tanks
Cyanidation and Carbon-in-Leach tank farm construction with structural baffle frames.
Knelson Centrifugal Concentrators
Centrifugal gravity recovery concentrators staged for free gold separation ahead of cyanidation.
Poured Gold Doré Bullion Bar
Refined gold bullion bar smelted and poured directly on site from Bondo processing plant output.
Gravity Shaking Table Circuit
Shaking table and gravity sluicing circuit for continuous fine gold recovery testing.
Shaft Hoisting & Extraction
Underground shaft headframe, cable winches, and ore extraction hoisting infrastructure.
Active Mining Sites & Concessions
Bondo, Siaya County
Primary gold mining and CIP/CIL carbon-in-leach processing operations at Nyangoma, Bondo Sub-County, under NEMA approval Ref: NEMA/PR/SYA/002.
Oyugis, Homa Bay County
High-grade gold quartz vein extraction and gravity recovery operations across the productive Oyugis gold corridor in Homa Bay County.
Lolgorian, Narok County
Underground quartz reef shaft mining and mineral processing in the historic high-grade Lolgorian gold belt (Trans-Mara, Narok County).
Taita Taveta
Precious gemstone concessions and gold mining operations in the Mozambique Metamorphic Belt in Taita Taveta (Tsavorite, Ruby, Sapphire, Gold).
Tanzania
Foundation mining concessions in Tanzania where the company began, including an active company-owned Tanzanite gemstone mine.
Carbon-in-Pulp (CIP) & Carbon-in-Leach (CIL) Process Flow
Adsorption — CIP / CIL
0608Activated carbon adsorbs dissolved gold from the pregnant leach solution.
- Function
- Gold recovery onto carbon
- Typical equipment
- CIP/CIL tanks
- Carbon screens
- Carbon transfer pump
CIL adds carbon to the leach tanks. CIP adds carbon after leaching. The two configurations lead to different tankage and screening arrangements.
Indicative unit operations only. A circuit configuration, its sizing and its reagent regime cannot be fixed without ore characterisation and metallurgical test work.
Plant Design Criteria & Operating Tolerances
| Circuit Stage / Parameter | Standard Design Criteria | Operational & Engineering Notes |
|---|---|---|
| NEMA Environmental Permit | Ref: NEMA/PR/SYA/002 | Issued by County Director of Environment, Siaya |
| Primary Milling Circuit | Continuous Wet Ball Mill on reinforced plinth | Closed-circuit with hydrocyclone classification |
| Target Grind Particle Size (P80) | 74 µm (80% passing 200 mesh) | Ensures maximum gold liberation from quartz host rock |
| Leaching & Adsorption System | Carbon-in-Leach (CIL) / CIP Agitation Tanks | Multi-stage continuous counter-current carbon movement |
| Gravity Concentration Efficiency | Single-pass Knelson / Sluice recovery | Captures coarse free gold prior to cyanidation |
| Doré Smelting Induction Furnace | High-frequency electric induction smelt | Produces 90%–96% pure gold doré bullion bars |
| Tailings & Environmental Management | Zero untreated effluent discharge | HDPE-lined tailings storage with cyanide neutralization |
In-House Mechanical & Electrical Engineering Support
Green Ngoria maintains permanent in-house mechanical and electrical engineering departments to design, erect, and maintain heavy mining equipment.
Our engineering teams manage heavy crane rigging, precision shaft laser alignment, motor control centers (MCC), and emergency spare parts replacement to guarantee high plant availability and minimum downtime.
Environment, Health and Safety Standards
- Environment, Health and Safety is given priority in all projects the company undertakes.
- EHS is treated as a competitive strength that benefits clients, shareholders and employees alike — not as an administrative overhead.
- Management commits to continual EHS improvement through defined objectives and targets.
- Training and active employee participation are used to keep EHS practice current on site.
- New ideas from the workforce are sought and adopted where they improve EHS performance.
- EHS is coordinated with clients and suppliers rather than managed in isolation.
- Performance is reviewed by management annually.
Gold Processing & Mining Operations FAQs
Where are Green Ngoria’s primary gold mining and extraction sites located?
Our primary gold mining operations are situated in Bondo (Siaya County), Oyugis (Homa Bay County), Lolgorian (Narok County / Trans-Mara), and Taita Taveta in Kenya, alongside mineral concessions in Tanzania.
What is the processing capacity of the Bondo gold plant?
The Bondo plant is configured for modular expansion, featuring closed-circuit ball milling, Knelson gravity separation, and continuous CIL agitation leaching with automated gold room electrowinning and bullion smelting.
Does Green Ngoria accept custom ore feed or contract milling for third-party mining operators?
Yes. We offer toll-milling and contract mineral processing arrangements for qualified artisanal and small-scale miners with verified head grades and licensing provenance.
Partner with Green Ngoria in Gold Mining & Processing
For joint-venture mining opportunities, concession development, equipment supply, or toll milling enquiries, contact our managing director's office in Nairobi.
Customer care & enquiries
Director lines & emails: Leadership Profiles →
Tatu City, Kijani Ridge, Nairobi, Kenya