Water Resources

Lilongwe Water Board Treatment Works | Nicholas O’Dwyer

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Project Title: 

Lilongwe Water Board Treatment Works | Nicholas O’Dwyer

Location:

Lilongwe, Malawi

Client: 

Lilongwe Water Board

Business Sectors: 

Water Resources

Services (Technical Disciplines):

  • Detailed Design
  • Tender Dossiers
  • Procurement
  • Construction Supervision
  • Construction Management

Project Objectives/ Outcomes:

The main objective of the project is to prepare detailed engineering design, cost estimates and tender documents for Treatment Works III (50,000m³/day Drinking Water Treatment Plant), provide assistance in the tendering process and to supervise construction of the works.

The project also included upgrade of existing water treatment plants (capacity of 125,000m³/d) to serve over 1.1 million people in the city of Lilongwe, Malawi. The scope of the works include: Analysing the suitability of locating Treatment Works III on an alternative site to one proposed in preliminary design report; Preparation of detailed engineering designs, drawings, specifications for the Water Treatment Works III (TW III) and tender documents; Financial Analysis – Preparing cost estimates, economic, and financial assessments including the following: Preparing detailed cost estimates for the technology, civil works, commissioning, and erection including environmental and social costs; Environmental and social scoping of the water supply facilities; Assessing and reviewing operational efficiency of the existing water treatment plants (TWI and TWII) and proposing measures for efficiency improvement, including detailed designs and cost estimates; Construction supervision of the Treatment Works III including efficiency improvement measures for TWI and TWII.

Our Role: 

  • Detailed engineering design
  • Review of Tender Documents including Drawings, Specifications, Modifications to Conditions of Contract (FIDIC Red Book)
  • Preparation of Contract Documents, Tender Evaluation and Recommendation of Preferred Bidder, Tender Adjudication
  • Construction Management including; Review of Contractors Proposals Management of Variation Orders Commissioning Certification Interim and Final Valuations Dispute Resolution
  • Construction Supervision (FIDIC Red Book)
  • Defects Liability Monitoring

Geoscience Ireland Contact:

Michel Davitt – mdavitt@nodwyer.com

Nacala Boreholes, Transmission Mains, and Distribution Centres | Nicholas O’Dwyer 

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Project Title: 

Nacala Boreholes, Transmission Mains, and Distribution Centres | Nicholas O’Dwyer

Location:

Nacala, Mozambique

Client: 

Fundo de Investimento e Património do Abastecimento de Água (FIPAG)

Business Sectors: 

Environment, Water Resources

Services (Technical Disciplines):

  • Preliminary Design
  • Detailed Design
  • Tender Dossiers
  • Procurement
  • Construction Supervision

Project Objectives/ Outcomes: 

The Nacala water supply distribution system is supplied by two sources. The first source is a dam on the Muecula River some 30 km south west of the city. The reservoir has a storage capacity of about 4.4 million m³. The dam was rehabilitated and raised to expand the capacity of the reservoir to facilitate a supply increase from 7,200 to 10,000 m³/day.

The second source for the distribution system is the Mpaco and Mutuzi (I and II) well fields. These well fields have a total of ten boreholes with flows between 1,080 and 2,400 m³/day each, resulting in a combined capacity of 13,920 m³/day. Further groundwater investigations indicated that the sustainable capacity of this second source was 23,000 m³/day. This project provided for the construction of the following works: Development of 22 No. Borehole sources together with collection systems; 2 No. 200m³ RC collection reservoir and 1 No. 100m³ RC collection reservoir; 4 No. High lift Pumping stations; Approximately 10km of 350mm and 17km of 200mm transmission mains; 2,000m³ service reservoir and 250m³ water tower; Extensive mechanical and Electrical works.

Our Role:

  • Preliminary and Detailed Design of Groundwater Abstraction Systems, pumping stations, Transmission Mains
  • Design review of Distribution Centre and Water Tower
  • Preparation of Tender Dossiers
  • Review the Environmental Management Plan (EMP) prepared by the Contractor
  • Supervision of the construction, commissioning and hand-over of the Schemes
  • Monitoring the Contractors design progress in accordance with the Contractual Programme
  • Instructing and monitoring the Contractor regarding compliance with health and safety precautions
  • Review of payment applications and approval of all eligible payments for the Employers action

Geoscience Ireland Contact:

Michel Davitt – mdavitt@nodwyer.com

Chetwynd Reservoir Internal Inspection | Murphy Geospatial

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Project Title:

Chetwynd Reservoir Internal Inspection | Murphy Geospatial

Location:

Cork, Ireland

Client: 

Malachy Walsh & Partners / Irish Water

Business Sectors: 

Civil Infrastructure / Water Resources

Services (Technical Disciplines):

Upon receipt of an initial enquiry regarding the ability to obtain UAV captured images of the internal concrete wall of the reservoir, we gained an understanding of what Malachy Walsh & Partners required. Due to difficulties in ensuring reliable communications with a UAV, Murphy Geospatial suggested an alternative approach which was accepted by our client.

Upon award of the contract, Murphy Geospatial coordinated with multiple stakeholders to ensure all necessary preparations were made. The reservoir was emptied for the purposes of the inspection and any necessary repair, so the inspection needed to be carried out within a certain window of opportunity.

A two-man team was used to carry out the survey. With all appropriate PPE, including rope access harness and confined space kits, our inspectors used a 10 m telescopic pole in 3 radial bands around the internal wall of the reservoir at increasing heights. The pole had high-intensity LED lights to illuminate the wall and a high-definition HDR camera which could be remotely operated from the ground. A preview of the image was visible to the inspectors to ensure high quality results and avoid blurred images etc. before moving to the next section.

Project Objectives/ Outcomes: 

Murphy Geospatial delivered a set of high-quality photographs enabling an appropriate engineering assessment to be carried out.

Our client was able to proceed with their engineering assessment with confidence. Our combined efforts, along with other project stakeholders, partly ensures that residents of Cork City will have a secure water supply for years to come.

Our Role:

Murphy Geospatial was approached by Malachy Walsh & Partners to assist with the structural inspection of a key part of the water supply infrastructure in Cork City. High-quality visual inspection data was required to identify any defects in the post-tensioned concrete Chetwynd water reservoir structure, south of the city. The internal space was classified as confined space working, perfectly suited to our specialist inspection skills. Murphy Geospatial proposed a bespoke solution to capture the data required, fixing remotely operated high-definition cameras and LED lights to a telescopic pole.

Geoscience Ireland Contact:

David Graham (dgraham@murphysurveys.ie)

Monrovia Raw Water Pipeline Project | Nicholas O’Dwyer

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Project Title:

Monrovia Raw Water Pipeline Project | Nicholas O’Dwyer

Location:

Monrovia, Liberia

Client: 

MCA-Liberia

Business Sectors: 

Water Resources

Services (Technical Disciplines):

  • Detailed Design
  • Procurement
  • Construction Supervision
  • Capacity Building

Project Objectives/ Outcomes: 

The objective of the Project was to replace the raw water pipeline from the dam at the Mount Coffee Hydro Power Plant (MCHPP) to the Water Treatment Plant (WTP) serving Monrovia. During the pre-civil war period, there were two raw water supply sources feeding the WTP: a) A 42-inch intake pipe and lift pumps on the St. Paul River where the WTP is located. b) A 36-inch ductile iron pipe (DIP) that transmitted water by gravity from the dam at the MCHPP to the WTP. In the 1970s, the gravity pipeline was installed to replace the 42-inch intake at the WTP due to saltwater intrusion at the river intake.

The proposed pipeline route was approximately 5 km long and generally followed the original alignment of the pipeline with small deviations. Replacement of the river intake pumps with gravity flow through the new pipeline will reduce energy use at the WTP. In addition, the improved reliability of the raw water supply to the WTP will result in more consistent water supply to the LWSC service area. MCA-Liberia procured a Works Contractor for executing a design-build contract following FIDIC Conditions of Contract for Plant and Design-Build 1999 (“Yellow Book”), MCC’s Environmental Guidelines and the IFC Performance Standards.

The Scope of Works comprise all Works (detailed design, manufacture, supply, erection, construction, installation, testing, commissioning and training) necessary for the Works Contractor to design and construct fixtures, fittings, and equipment for the Works to be fit for conveying water from the MCHPP reservoir to the WTP.

Our Role:

  • Review of Tender Documents including Drawings, Specifications, Modifications to Conditions of Contract (FIDIC Yellow Book)
  • Preparation of Contract Documents, Tender Evaluation and Recommendation of Preferred Bidder
  • Construction Management including; Review of Contractors Proposals Management of Variation Orders Commissioning Certification Interim and Final Valuations Dispute Resolution
  • Construction Supervision (FIDIC Yellow Book)
  • Defects Liability Monitoring
  • Capacity Building / Training (with emphasis on FIDIC Yellow Conditions of Contract)

Geoscience Ireland Contact:

Michel Davitt – mdavitt@nodwyer.com

Adaptive Management of Barriers in European Rivers -EU | Compass Informatics

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Project Title:

Adaptive Management of Barriers in European Rivers -EU | Compass Informatics

Date:

05/2020 – 07/2020

Location:

European Union

Client: 

Marine Institute

Business Sectors: 

Water Resources/ Environment

Services (Technical Disciplines):

Our team provided geospatial analysis services to provide insights on a variety of themes impacting the conservation of Atlantic Salmon in the EU. Using Python programming and ArcGIS, the team merged 21 river networks from estuary to sub basin level to assess European river connectivity. An SQL database was developed to consolidate data regarding the extant and historical salmon population using rod catch reports from 2000-2019.

Areas of the network were attributed to identify areas with geographically proximate qualities, ecological quality scores, dendritic connectivity indices and the location of main river barriers.

Water temperature was attributed using previous Global monthly levels (1981-2014) and modelled projections for 2020-2080, these large raster datasets where processed and amalgamated with the closest river sections, creating Climate Change forecasts for individual river networks.

Project Objectives/ Outcomes: 

Much of Europe depends on water from rivers for drinking, food production, and the generation of hydropower, which is essential for meeting the EU renewable energy target. Infrastructure for agriculture and energy production such as barriers and weirs can fragment habitats and block migratory species. Only half the EU surface waters have met the WFD’s 2015 target of good ecological status. Some barriers are old and out of use, but may hold historical value. European rivers need to take the complexity and trade-offs imposed by barriers into account to inform future decisions. From 2016 to 2020 AMBERs set out to apply adaptive management to the operation of barriers in European rivers. To achieve a more effective and efficient restoration of stream connectivity.

Our Role:

Our role involved providing expert geospatial analysis services through the analysis, amalgamation and aggregation of complex EU hydrological data. With the data consolidated and visualized cartographically, ecologists can effectively and efficiently identify opportunities to restore stream connectivity, improve water quality and promote biodiversity.

Geoscience Ireland Contact:

Gearóid O’Riain/ goriain@compassinformatics.com

Mbarara Water and Sanitation Project (Design) | Nicholas O’Dwyer

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Project Title:

Mbarara Water and Sanitation Project (Design) | Nicholas O’Dwyer

Location:

Uganda

Client: 

National Water and Sewerage Corporation

Business Sectors: 

Water Resources/ Environment

Services (Technical Disciplines):

  • Feasibility
  • Preliminary Design
  • Detailed Design
  • Tender Dosiers

Project Objectives/ Outcomes: 

The project involves the detailed design, preparation of tender documents, procurement and construction supervision for works to the existing water and sanitation infrastructure in Mbarara in western Uganda. The project is being delivered in two stages; Stage 1 is Detailed Design and Stage 2 is construction supervision.

In terms of Stage 1 the scope of the Detailed Design includes the following works;

  • Rehabilitation of the existing Water Treatment Plants at Kabale road in Mbarara (capacity of about 5,000 m³/day),
  • Rehabilitation of Ruharo intake and WTP (existing capacity of about 8,000 m³/day) and extension with a new line of 8,000 m³/day,
  • Rehabilitation (including NRW reduction through implementation of DMA), intensification and extension of the distribution system in Mbarara service area,
  • Detailed design of approximately 20km of trunk and distribution mains ranging in size from DN150 to DN300.
  • Upgrade and rehabilitation of approximately 10km of sewer networks within 3 catchments including 1 Nr. Pumping station.
  • Detailed design for upgrades and rehabilitation to existing waste stabilisation ponds in the catchments of Katete, Kakoba and Kizungu.
  • Detailed design for new faecal sludge treatment centre and associated effluent treatment.

Nicholas O’Dwyer carried out all civil, structural, process, mechanical and electrical designs for the water and sanitation infrastructure. An ESIA and RAP study was also carried out for the project. Procurement of the works contracts will be through FIDIC Red conditions of Contract. Nicholas O’Dwyer will provide the key experts for the management and supervision of the works which have an estimated value of $35m.

Our Role:

  • Review and update of Preliminary Designs
  • Detailed Design of Water and Wastewater Improvement Works
  • Preparation of Tender Documents (FIDIC)
  • Assistance during the Procurement Stage
  • Assistance in preparation of ESIA and RAP

Geoscience Ireland Contact:

Michel Davitt – mdavitt@nodwyer.com

Detailed Design and Construction Supervision of Water and Sewerage Networks in the towns of Chingola, Chililabombwe and Mufulira | Nicholas O’Dwyer

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Project Title

Detailed Design and Construction Supervision of Water and Sewerage Networks in the towns of Chingola, Chililabombwe and Mufulira | Nicholas O’Dwyer

Location

Zambia

Client

Mulonga Water and Sewerage Company Ltd.

Business Sectors

Water Resources/Environment

Services (Technical Disciplines)
  • Preliminary Design
  • Detailed Design
  • Tender Dossiers
  • Procurement
  • Construction Supervision
  • Construction Management

Project Outcomes/Objectives

Detailed Design and Construction Supervision of Water and Sewerage Networks in the towns of Chingola, Chililabombwe and Mufulira within Zambia’s Copperbelt Province. The project will ultimately serve an estimated population of about 1.1m inhabitants. The services were executed in two phases:

Phase 1: updating existing outline designs; carry out detailed designs for the agreed technical options and obtaining necessary permits; providing detailed cost estimates; preparing the technical content of the Bidding Documents for the selection of a 3 no. works Contractors for the Rehabilitation and Expansion of the Water and Sewer Networks; preparing 3 no. FIDIC Red Book Contract Documents and supporting the evaluation of the technical aspects of bids. The detailed design includes 67km of bulk water pipelines, 133km of water reticulation network, 87km of sewerage network, 6 no. pump stations and 22 no. reservoirs.

Phase 2: Construction supervision of the above.

Our Role
  • Environment Impact Assessment (EIA)
  • Surveys (Topographic and Geotechnical)
  • Detailed designs of water networks and sewer networks
  • Preparation of Tender Dossiers (to EIB Standards)
  • Procurement of Works Contractors
  • Contracts Management and Site Supervision
  • Implementation of Safeguards
Geoscience Ireland Contact

Michel Davitt (mdavitt@nodwyer.com)

Lusaka Sanitation | Nicholas O’Dwyer

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Project Title

Lusaka Sanitation | Nicholas O’Dwyer

Location

Lusaka, Zambia

Client

Lusaka Water and Sewerage Company Limited

Business Sectors

Water & Environment

Services (Technical Disciplines)

  • Construction Supervision
  • Construction Management

Project Objectives/Outcomes

The Lusaka Sanitation Program aimed to increase access to sustainable sanitation services to Lusaka’s residents especially the urban poor and strengthen Lusaka Water and Sewerage Company’s (LWSC) capacity to manage sanitation services.

The program aims to address one of Zambia’s most binding constraints to economic growth through infrastructure investment in Lusaka, the rapidly urbanizing capital.

There were 3 components to this project:

1) CSE-08: Collection System Expansion Emmasdale and Chaisa, Ngwerere Sewershed – Construction of 18 km of gravity sewers of diameter 160 to 500mm.

2) CSE-23: Collection System Expansion Kafue Road, Manchinchi Sewershed – Construction of 10 km of sewers of diameter 160 to 500 mm and 3 No. pump stations and provision of access to sanitation to 132 No. commercial enterprises.

3) CSU-05: Upgrade of Ngwerere West Interceptor, Ngwerere Sewershed – Construction of 4 km of sewer interceptor of varying diameter.

Our Role

  • Design Review
  • Redesign of sewer system
  • Contract Management
  • Construction Supervision
  • Finanical Management and Claims Management
  • Quality Control
  • Environmental and Social Monitoring
  • Defects Liability Monitoring
  • Review of Operation and Maintenance Manuals
  • Review of As-built Drawings

Geoscience Ireland Contact

Michel Davitt – mdavitt@nodwyer.com

Addis Ababa City Eastern Sewerage Catchment | Nicholas O’Dwyer

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Project Title

Addis Ababa City Eastern Sewerage Catchment | Nicholas O’Dwyer

Location

Addis Ababa, Ethiopia

Client

Addis Ababa Water and Sanitation Development & Rehabilitation Project Office (AAWSA-PO)

Business Sectors

Water Resources

Services (Technical Disciplines)

  • Feasibility
  • Preliminary Design
  • Detailed Design
  • Tender Dossiers
  • Construction Supervision

Project Objectives/Outcomes

Feasibility Study, Tender Document Preparation for Design-Build-Operate (DBO) of the Waste Water Treatment Plant, and Supervision for the DBO; Feasibility Study, Design, Tender Document Preparation, and Supervision for the Construction of the -Sewer System (Design-Bid-Build=DBB) Tendering and Evaluation of Tenders of the DBO and the DBB project Work Supervision of construction, and Operation and Maintenance service of WWTP for five years.

Our Role

  • Feasibility Study for sewering 150km² of city catchment serving 33% of Addis Ababa
  • Detailed Design of the sewer network and WWTP
  • Preparation of Bidding Documents and Evaluation Assistance (FIDIC Gold and FIDIC Red)
  • Construction Supervision
  • Supervision of Operation & Maintenance of WwTP

Geoscience Ireland Contact

Michel Davitt (mdavitt@nodwyer.com)

River Dodder Weir Survey | Murphy Surveys

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Project Title

River Dodder Weir Survey

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