GWE Consulting Engineers

Key capabilities

• Onsite Wastewater treatment systems
• Stormwater
• Water Supply
• Commercial and Industrial Wastewater
• Geotechnical Engineering
• Project Management
   

Onsite Wastewater Treatment

• Due diligence/pre purchase inspections of existing wastewater systems
• Site investigations
• Design for septic tanks, aerated treatment, activated sludge, filtration systems
• Land disposal of treated effluent
• Specialist advice for renewing failed systems
• Preparation of specialist reports to support resource consent applications
   

Stormwater Management

• Catchment hydrology
• Option identification and evaluation
• Rainwater re-use
• Low impact design
• Permeable paving, infiltration and soakage design
• Stormwater detention and flow attenuation design
• Flood identification and mitigation
• Pipeline and culvert design
   

Municipal Water and Wastewater

• Master planning
• Concept and detailed design
• Pipelines
• Pump Stations
• Remedial works for leak and I/I reduction
• Tendering
• Contract Management
   

Commercial and Industrial Wastewater

• Process design and review
• Process improvements and optimisation
• Automation, control and monitoring systems
• Operator support and training
• Design for managing Farm dairy Effluent
• Preparation of Trade Waste Management Plans
• Preparation of specialist reports to support resource consent applications
   

Geotechnical

• Site investigations
• Engineering geology
• Construction monitoring and inspections
• Pre-purchase and due diligence reports
• Slope stability analysis
• Computational modelling
• Geotechnical design

 

GWE Consulting’s team of experienced geotechnical engineers specialise in the investigation, interpretation and analysis of geological processes, risks and ground conditions for land development projects. Our services include planning and overview site investigations, option studies for foundations, retaining walls and piles, slope stability analysis, pavement design and geotechnical hazard studies.

Site Investigations

GWE offers a full range of geotechnical site testing to inform thedesign and for construction monitoring. Services include:

• Borehole logs and subsoil conditions
• Scala penetrometer testing
• Machine drilling
• Excavated test pits
• Groundwater monitoring
   

Pre Purchase Inspections and Due Diligence

GWE provide a range of services for prospective land developments, from new residential dwellings through to multi-lot subdivisions. We help our clients understand geotechnical risks with land development and mitigation measures early in the development process

Slope Stability Analysis

GWE’s team of engineers are highly experienced in slope stability analysis of natural soil and rock slopes, embankments, excavations and cut surfaces. We use site observations, geological data and advanced modelling techniques to assess relative slope stability. Our services include:

• Site investigations
• Settlement and ground movement analysis
• Investigation of existing earth slips
• Computational modelling
• Identification of mitigation measures
   

Geotechnical Design

GWE has extensive experience with the design of geotechnical elements to support infrastructure and land development projects. Our design services include:

• Footings
• Piles
• Retaining walls
• Soil nails and mechanically stabilised earth walls
• Pavements
• On-site wastewater disposal

GWE’s services to municipal clients consist of technical advice and the planning, design and management of infrastructure projects. We have expertise in the whole project lifecycle from initial investigations and feasibility studies through to outline and detailed design, implementation and commissioning for treatment plants, pipelines and pump stations.

Master Planning and Options Identification

Our team undertake high-level master planning for municipal water infrastructure to assist with identifying long term infrastructure requirements. This includes:

• High-level option identification and business case development
• Cost Estimation (Capital and Operational)
• Identification of planning and resource consenting issues
• Risk assessments
• Multi-criteria analysis and other option evaluation techniques
   

Treatment Process Design

GWE’s team of engineers undertake the design of processing equipment for wastewater that require treatment prior to discharge to the environment. This includes:

• Review of existing treatment processes to identify bottlenecks and opportunities for improvement
• Process design for new wastewater plants
• Design and automation of chemical dosing and storage facilities
• Design and automation of process monitoring and telemetry
• Operational improvements, operational support and training
   

Pipeline and Pump Station Design

GWE assists our clients with the design of pipeline and pump stations for water, wastewater, and stormwater networks. Our team of engineers are highly experienced in hydraulic design, route selections, materials selection, water hammer analysis and construction techniques for pipelines and pump stations operated by Councils and large industrial operations. GWE are also able to assist with remedial works for existing water and wastewater networks to reduce leakage and inflow/infiltration.

Tendering and Construction Management

• Preparation of tender documents
• Tender evaluation
• Construction management
• Operator Training
• Commissioning

GWE Consulting Ltd offers a range of solutions to help manage the effects of stormwater runoff within individual residential properties, subdivisions and commercial and industrial areas. Our team of engineers are experienced with the design of stormwater management devices to meet regulatory standards for water quality and flows

Integrated Approach

GWE’s approach to stormwater management incorporates the assessment of environmental resources and sensitivities, identifying client and community needs, evaluating flood and stormwater discharge effects and developing solutions to manage these effects to achieve sustainable environmental outcomes.

Stormwater Re-use, Detention and Infiltration

GWE provide innovative and sustainable site specific solutions for the management of stormwater within our client’s sites. Our capabilities include stormwater hydrology and hydraulic modelling, stormwater treatment design including:

• Rainwater tanks and stormwater re-use
• Detention tanks and ponds
• Permeable paving, soak pits and infiltration
• Wetlands
• Sand filters, rain gardens and other stormwater filtration
   

Site Layout and Design

GWE has extensive experience with the hydraulic modelling and design of stormwater pipelines to effectively collect and convey stormwater runoff away from hard standing areas and into existing public drains or other disposal areas. Our design services include:

• Pipeline design
• Open channel, swale design
• Low impact design
• Pump station design
   

Flood Assessment and Mitigation

Flooding is a common hazard for many developments in urban, peri-urban and rural environments. The extent of flooding is numerous factors including site topography, rainfall intensity and soil conditions. GWE undertakes hydrologic and hydraulic modelling for sites that are prone to flooding. We identify the extent of flood and overland flow paths and advise our clients on how to mitigate the effects of flooding with developments.

GWE’s experience providing design and consulting services related to potable water source selection, treatment and supply range from preliminary engineering through to construction and incorporates a wide range of technologies and processes.

In many communities across NZ, public water safety has been catapulted to the forefront of concern.
With awareness of treated water quality at an all-time high, and regulations becoming more and more stringent, the task of providing new or upgrading existing infrastructure becomes ever more challenging.

We offer comprehensive consulting services to public and private clients facing the challenges of providing new or upgrading existing infrastructure. Our integrated approach to the development of project solutions matches contemporary standards and builds value for clients.

Water utility infrastructure

We provide advice and deliver engineering solutions—from planning, feasibility, design, and procurement to construction supervision—to optimize water and wastewater networks.

Master Planning

We can develop master plans that provide logical and cost-effective solutions that incorporate flexibility for growth. Using a multidisciplinary approach, our professionals coordinate and address all relevant technical areas, such as population and development trend projections, regulator requirements and cost estimates.

Water Source Selection

GWE’s hydrogeology services offer clients cost-effective and efficient options to locate, develop and manage water supplies.

Treatment Plants

With experience involving more than 100 water and wastewater treatment plants, GWE has the experience to support the challenges of treating surface and groundwater sources. Processes include conventional filtration, membrane processes, softening and disinfection

Pump Stations

GWE’s comprehensive services for pumping stations include engineering studies, reports, and design; resource consenting; cost estimating; tendering assistance; construction phase services; and start-up and operations assistance.

Pipelines

GWE is experienced in the planning and design of the collection, distribution, and transmissions pipelines for water and wastewater systems. We work with our clients to establish owner preferences, operating parameters, installation requirements, and external conditions along the pipeline route, for all its designs.

 

Land Development is a key part of our service, combining our experience in site investigations, feasibility studies, resource management planning, engineering design and project management. 

GWE has successfully provided engineering services on a range of residential, commercial and industrial greenfield and brownfield sub-divisions.

Our Land Development Services Include:

• Project Feasibility and Due Diligence Advice
• Site Investigation and Geotechnical and Contaminated Land Assessments
• Earthworks, Roading and Infrastructure Design
• Specialist Stormwater Design including stormwater management devices
• Water and Wastewater Design including pumping stations and treatment plants
• Project Management
• Construction Observation and Contract Administration
• Facility and Asset Management on behalf of Local Government and Land Owners