BCHODConsulting Engineers (Zimbabwe)
BCHOD
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DAMS & RELATED PROJECTS
The Firm has fully qualified civil, structural, electrical and mechanical engineers and support staff who are employed on major engineering and building projects as separate disciplines or brought together as a multidisciplinary unit.
Engineers are incorporated into design teams involved in civil engineering projects which, in addition to their basic civil engineering nature, require the involvement of engineers from disciplines such as sewage treatment and water treatment facilities.
The firm has undertaken many assignments over a wide range of engineering application. This has required the structuring of project teams comprising differing skills to cover the project requirements of:
In the Building Sector we have extensive experience in providing services in the Electrical, Mechanical, Structural and Civil Engineering fields to mining, industrial and commercial buildings and developments of all kinds. These services include basic planning, master planning, layout design, layout, design of buildings reinforced concrete and steel frame construction, air-conditioning, plumbing, electrical power supply etc.
A few mining related projects are listed below, together with examples of industrial and commercial projects.
Detail designs for new infrastructure requirements and implementation of construction phase for roads, all buildings, power supply, water and sewerage, airstrip, landfill and associated works including foundations and other civil works for the DMS plant and various installations related to high security areas.
Civil and Structural Engineering designs for Ore handling options, roads, airstrip and related infrastructure. Included were overland conveyor options and full documentation for three crushing stations, two silos, offloading stations and associated conveyors, roadworks, etc. with EPCM firms Sandvik Materials Handling and DRA.
Detail designs and projects supervision for civil and electrical engineering for approximately 1407 housing and associated community services = Value $31 million – 2010-2012
Detailed Design for 578 houses including up to 14 house types and including architectural services. Value estimated at US$35 million.
Design and supervision of construction of water and sewerage reticulation as well as package water treatment plants and sewage treatment plants for Unki Mine to service initially 1409 stands and construct houses 900 stands. Water treatment plant and waste water treatment plants provided being pre-fabricated plants. Design and Construction supervision of double storey housing unit for the development. Design and construction supervision of a modern Double storey Primary School. Prefeasibility and feasibility studies, Preliminary designs, detailed designs, Preparation of tender documents, Tender adjudication and Construction supervision
- ANGLO –ASHANTI GOLD –
Freda Rebecca Mine Maintenance and rehabilitation related works including concrete bases and other minor civil engineering.
- BINDURA NICKEL MINE – Trojan Mine
Designs for retaining walls, mill foundations and other related civil works.
Cluff Minerals – (and Anglo – Ashanti Gold)
Investigations of foundation difficulties during construction of Freda Rebecca Mine for Nedpak, Australia relating to structural design due to variance with local soils conditions. Instant decisions had to be reconciled whilst civil contractor was carrying out base excavations. The project was designed to give access to a primary crusher station by means of high level retaining wall and dump truck feeder road.
Conveyors and pipework support system to tailings pump station.
Structural steel work and reinforced concrete retaining walls to support increased capacity crushers and screens. Checking of existing installed steel work to support 20 tonne maintenance overhead crane gantry.
Elvington Gold Mine
Preparation of proposal with Bateman Group for Gold Processing Project etc., providing local engineering services.
Design of underground conveyor tunnels, retaining walls, structural steelwork and roads systems and localizing overseas process designs to suit availability of local obtainable materials, in particular, structural steelwork sections for civil engineering contractor.
Commoner Mine (gold extraction from old workings)
Design of foundations, machine plinths, structural steelwork for a revitalized gold mine working, utilizing rehabilitated machinery.
ZISCO
Ore handling plant- Ore Crushing plant
Major transportation study concerning movement of 2m tonne/annum of ore from new mine at Buchwa which is 215km from the ZISCO Plant
ZIMBOARD III MILL
Heavy-duty mill press foundations to support hydraulic press and finishing mill machinery and effluent treatment plant.
Large white water chests containing highly aggressive liquid post-process which later is transferred to an effluent plant prior to discharge to municipal sewer.
NYANGA TIMBERS SAWMILL
All engineering design and project management for a new state of the art sawmill with particular reference to frame saw, chipper and log de-barker foundations.
Large clear span dry mill building for finished products and three compartment and progressive kilns.
Mhangura Copper Mine
Report and recommendation for the rehabilitation of reinforced concrete wall sections due to excessive ore dumping methods being used within the soils at Mhangura.
Renco
Complete surface development of the new Renco Gold Mine. This included all of the infrastructure services including Town Planning to the mine, plant and residential areas including bulk water supplies, main access roads and sewage treatment. This followed the preparation of a report on Planning of New Mine villages.
Zinca Mine Chegutu Area
Town planning and Infrastructure requirements for the Zinca Mine which include the Town Planning for 75 low density houses, 100 medium density houses and 2000 high density houses, bulk water supply for industrial and domestic purposes 10 500 cubic metre/day
Water treatment, storage and reticulation, sewage system and disposal, electrical supplies for ultimate load for domestic and industrial purposes, internal roads and Stormwater, materials location for concrete work and house blockwork. The analysis and upgrading of some 65 kilometres of access gravel roads to the mine from the main national road and Cam & Motor Mine.
Rio Tinto and Falgold
Joint Water Supply Scheme for Golden Valley/Patchway Mines northwest of Kadoma including reservoirs, associated works and 17 kms of 250 and 200mm diameter asbestos cement pipeline.
Sengwa
Major feasibility study concerned with the production of methanol from coal at Sengwa. The process specialists were Messrs Badger and our role was the total infrastructure.
The alternatives considered were to place the methanol plant either at the coal deposit or in Kwe Kwe and the comparisons required a transportation study related to road, rail and pipeline transportation of coal and the locating, siting and costing of the industrial and mine complex with associated domestic accommodation. In the option of producing methanol at Sengwe a dam of major size and an airport were required.
Investigation into provision of bulk water supplied for Tiger Reef, Arcturus and How Mines. Design and Supervision of Dams at Mazowe, How and Athens Mines.
Presently engaged on further dam design for How Mine.
Investigations and report into augmentation of water supply scheme for Mvuma/Athens Mine including study of associated dam.
Structural, civil works including surveys, earthworks, Stormwater drainage, roads, control buildings, transformer and all ancillary equipment foundation designs to major substations in Midlands.
Design and Construction of New Zvishavane Airport.
Raw water intake, treatment works, pumping mains, reservoirs and 16km of gravity mains for bulk water supplies to Zvishavane Mining Complex.
Sewage treatment facilities for King Village, Gatt’s Mine, Mashava, including reclamation of effluent for use in the Mill area
Planning, design and supervision of Development construction for the development of 600 stands in a new main township at Mutoroshanga. Works included 580 low cost houses, roads, stormwater drainage, water reticulation, sewage and a new sewage disposal works to cater for800 properties.
Design and supervision of construction of infrastructure for up to 450 stands in Sebanga Park Township for Shurgwi Town Council and Union Carbide, and augmentation of water supply for both town and mine. Works included new water treatment works, pumping mains, reservoirs and a new sewage treatment works. Phase I works now completed including 250 stands and150 houses for mining employees.
Transportation study in the mine area of alternative transport modes, as part of plant location studies and infrastructure services in the mine area, 225 km of access road from Francistown to the mine.
A highly detailed transportation study. This entailed an advanced feasibility study with economic studies set at levels acceptable to the World Bank. Recommended rail route from Francistown to Sua and preliminary routing of rail link to Namibia.
Project airfield design.
We were responsible for developing a housing strategy for works on a proposed coal mine. The investigations covered housing policy in general, home ownership and the like.
Feasibility study for water supply at Kgaswe. Comprised a combination of surface water storage, ground water resource development and underground storage in the mine after two years of development.
The design and detailing of buildings, which included workshops and stores, change house complex, administration buildings, treatment plant, hostel area for 12 000 miners plus other ancillary buildings. Substantial railways, railway sidings, sewer, sewage treatment, reclamation and reuse of sewage effluent, roads, Stormwater drainage etc. The value of work undertaken by ourselves was approximately R40 m.
All the mine infrastructure services including water supply, sewers and sewage
Treatment, electrical reticulations, haul roads, access roads, residential areas, hostel areas.
We were responsible for the entire surface infrastructure, including services for a town to house population of approximately 35 000. In addition, we also undertook a regional transportation study of Shaba province, annual rehabilitation of the national roads serving the mine area, location of airport, etc.
Provision of infrastructure services to hostel areas, also rail links and access roads and report on sewage treatment.
Provision of engineering infrastructure services.
In joint venture concerning a proposed mine development covering staff modeling, development including home ownership and housing strategy. Differing options were examined in the fields of location, planning, engineering and housing design and the most cost effective alternatives were identified.
Design and supervision of new covered fine ores storage facility to replace collapsed structural frame caused by failure of foundations due to underground workings.
Report on present company railway infrastructure and operations with recommendations for a 5 year development programme.
Fifteen years housing development programme in five phases for Mpatamatu Township (30 000 houses).
30 km haulage road for Nampundwe Mine for transport of ore to Sulphuric Acid Plant.
Report on major differential settlement of foundations of new process plant in Zambia Copper Belt.
Refuse Transfer Stations and pre engineering to refuse disposal sites including studies on refuse projection and waste movement, pollution control and surface and leachate runoff control. Study for refuse disposal over the next 20 years for the East Rand Region.
New Saw mill. Project Management and design of all materials handling systems, buildings, associated roads and fire protection system.
Heavy duty crane bays for hoisting earthmoving equipment.
