Project Showcase

These are some of the current and recent projects undertaken by Donegan Civil Engineering throughout the UK.


Witton Park, BlackburnWitton Park, Blackburn

Donegan recently completed this project direct for United Utilities as part of the larger Blackburn UIDs scheme. The purpose of this project was to resolve the unsatisfactory intermittent discharge (UID) from the combined sewer network to the River Blakewater.

The  solution will ensure that spill flows up to and including a 1 in 5 year return period are screened to a 6mm standard in two dimensions and will contribute to the River Quality Objective (RQO) for the River Blakewater.

The Civils scope works included the design and construction of a 20m internal diameter detention tank (stored volume in tank 4,500m3) complete with vac-flush central column to be self cleansing, RC Discharge chamber, RC Static screen chamber, 300mm diameter Outfall Sewer, modifications to an existing CSO chamber in Preston Old Road, 110m of 700mm diameter auger-bore, 4.00m diameter drive shaft for the installation of the auger-bore, 750mm diameter pipework from detention tank to River Blakewater (via new CSO chamber) and a reinforced concrete outfall structure.


The M&E scope of works included the design and installation of 1 No Isolation Penstock, 1 No 750mm diameter Flap Valve, 2 No Submersible Storm Return Pumps, 1 No submersible Scavenger Pump and 1 No tank flushing system; complete with vacuum pump, actuated valves, pressure and vacuum pipe, flushing column diaphragm valve assembly.

Click here to see the project details

 


 

Aqueduct Road & Bolton Road, Blackburn

Aqueduct Road, Blackburn

Part of United Utilities larger Blackburn UID’s scheme Donegan were awarded this project which would resolve 2 separate unsatisfactory discharges into the River Darwen.

The resultant work would ensure that the new Combined Sewer Overflow (CSO) chambers would comply with the Environmental Agency requirement to reduce the number of spills per year and screen any spills.

The 2 working areas were situated near to the junction of Aqueduct Road and Bolton Road in Blackburn.

The works at Aqueduct Road included the construction of a 10.30m internal diameter detention tank with 650m3 storage, including backdrop pipework, storm pumps and rising mains. Modifications to an existing brick CSO chamber including extending the external walls and constructing internal reinforced weir walls, complete with powered screen. Opencut pipework ranging from 225-900mm diameter and manhole chambers ranging from 1200-3000mm diameter.

The scope of works on Bolton Road included construction of a reinforced CSO chamber, complete with powered screen opencut and trenchless pipework ranging from 375-1200mm diameter manhole chambers ranging from 1500-3000mm diameter.

Click here to see the project details

 


 

Mossway, Middleton

Mossway, Middleton

The purpose of the project was to remove five properties from the DG5 Flooding Register by providing protection from internal and external flooding of the properties by increasing the storage capacity of the local sewers.

The scope of work included upsizing of the existing combined sewer, construction of a weir chamber, construction of an offline storage tank box culvert adjacent to the existing combined sewer downstream of the weir chamber.

Downstream of the box culvert storage tank a backflow prevention manhole was constructed to house a Tideflex check valve and on completion of the works full width road re-construction was undertaken to reinstate the working area approx 1500m2.

Click here to see the project details

 


 

Dewar Place Cable Tunnel, EdinburghDewar Place Cable Tunnel, Edinburgh

Donegan Civil Engineering recently completed this project direct for Scottish Power in the centre of Edinburgh.

The purpose of the project was to bring a new high voltage cable in through the tunnel to feed the new electrical sub-station.

The works involved constructing a 6.00m diameter drive shaft approx 24m deep, as can be seen in this picture, a 6.00m diameter reception shaft approx 13m deep, followed by a 2.10m diameter segmental tunnel approx 200m in length with a 90m radius curve along the line.

The drive shaft was constructed within a communal garden in a residential area, with the reception shaft located within what will be a new electrical sub-station.

Donegan procured a specially designed ’Roadheader Tunnel Boring Machine’ for the project which involved tunnelling through dolerite sub-volcanic rock with strengths recorded of up to 190mpa.

Click here to see the project details

 


 

Featherstone Prison, Wolverhampton

Featherstone Prison, Wolverhampton

Donegan Civil Engineering were appointed by Kier Construction to undertake this specialist subcontract which included the design, build and installation of an underground pumping station on the extension works to HMP Featherstone.

A 9.00m internal diameter shaft was sank by caisson method to a depth of approx 10m in sands, gravels and founded in very weak sandstone.

Surrounding structures included a Valve Chamber, Flow Control Chamber, Isolation Penstock Chamber and Macerator Chamber. Along with these structures there was also the interconnecting pipework, ductile iron backdrop pipework and rising main pipework.

The M&E works included 3 variable speed submersible pumps, rising main pipework, isolating penstock for maintenance purposes, a macerator channel grinder for breaking up solids and all electronic control equipment.

Click here to see the project details

 


 

Gorse Street & Wesley Street, Blackburn

Gorse Street CSO Chamber

Part of United Utilities larger Blackburn UID’s scheme Donegan were awarded this project which would resolve 2 separate unsatisfactory discharges into the River Darwen.

The resultant work would ensure that the new Combined Sewer Overflow (CSO) chambers would comply with the Environmental Agency requirement to reduce the number of spills per year and screen any spills.

Work at Gorse Street included construction of a large reinforced concrete CSO chamber around an existing 1200mm sewer, complete with powered screen, 150m of opencut pipework ranging from 600-1200mm diameter, manhole chambers ranging from 1800-2700mm diameter, 300mm diameter augerbore underneath Gorse Street approx 20m length and a new reinforced concrete outfall structure.

The scope of works at Wesley Street the smaller of the two sites involved the construction of a small reinforced CSO chamber around both an existing surface water and foul water sewer, complete with static screen, a reinforced concrete diversion manhole and interconnecting 225mm opencut pipework.

Click here to see the project details

 


 

Bedford Street, Darlington

Bedford Street, Darlington

This detention tank was constructed for Seymour Civil Engineering on a flood relief scheme for Northumbrian Water.

Donegan Civil Engineering were appointed to construct a 25.00m Internal diameter shaft which would provide an additional 2,500m3 / 2.5 million litres of foul water storage capacity.

The 25.00m internal diameter segmental shaft was underpinned to a depth of approx 7m in soft clays.

Once excavation had reached formation level and all the rings had been built grouted and caulked a mass concrete blinding was placed.

After steel reinforcement was installed for the structural concrete base slab, with starter bars protruding for the 4 no. concrete support columns for the precast concrete cover slab.

Click here to see the project details

 


 

Silecroft FTS, Millom, Cumbria ~ Rail Crossing

Silecroft Micro-Tunnel

Donegan Civil Engineering recently carried out this specialist tunnelling sub-contract for Daniel Contractors on a United Utilities scheme.

The scope of works included sinking by caisson a 5.50m internal diameter segmental drive shaft, as can be seen here, approx 8m deep through clays, sands and gravels with tidal water pressure.

Sinking by caisson a 4.00m internal diameter reception shaft, approx 5m deep in similar conditions to the drive shaft.

Carry out a 1000mm micro-tunnel drive approx 100m in length with a Herrenknecht TBM, which would act as a sleeve pipe through which a smaller gravity main could be installed.

As per Network Rails requirements the shafts were constructed outside the ‘zone of influence’ and during the pipejacking works operatives double shifted through the night until the TBM was recovered from the reception shaft.

Click here to see the project details

 


 

Tunstead Milton DG5, High PeakTunstead Milton

Donegan Civil Engineering were appointed as the main contractor on this United Utilities project.

United Utilities had a requirement within the AMP4 period to provide asset improvements that will remove properties from the DG5 Flooding Register.

During times of heavy rainfall the local combined sewer network would surcharge causing foul sewage to emanate from the gullies flooding local properties and closing Manchester Road.

The scope of works included 110m of 1050mm tank sewer with 85m3 (85,000 litres) storage capacity for combined water, 50m of 375mm and 35m of 225mm opencut pipework along with 9 manhole chambers ranging from 1200-3000mm diameter.

There was also 30m of 225mm augerbore underneath Manchester Road to minimise disruption along the busy rural route with no possible diversion route available.

Click here to see the project details

 


 

Clifton WwTW, Penrith, Cumbria ~ Rail Crossing

1500mm Tunnel

Donegan Civil Engineering undertook this specialist tunnelling sub-contract for Daniel Contractors on a United Utilities scheme.

The scope of the works included the construction of the new Hackthorpe pumping station which was a 6.00m diameter segmental shaft underpinned in hard sandstone to approx 10m depth.

After this a 6.00m diameter drive shaft and a 4.00m reception shaft, both approx 8m deep, were constructed on either side of one of the countries busiest railway lines the West Coast Mainline.

On completion of the shafts a 1500mm internal diameter pipejack approx 40m length was carried out beneath the railway line using an open-face backacter through boulder clay.

During the crossing Donegan operatives double shifted the drive and track level monitoring was carried out by Network Rail.

Click here to see the project details

 


 

Tewkesbury Drive, Lytham St Annes

Tewkesbury Drive - 15m Diameter Shaft.JPG

Donegan Civil Engineering were appointed as the main contractor on this United Utilities project.

The scope of works included the construction of a 15.00m diameter shaft which was sunk by caisson approx 15m deep.

The shaft was then converted into a detention tank which would store storm water during times of heavy rainfall to prevent flooding of the local area and take a total of 11 local homes off the flood register.

Work also included constructing an insitu reinforced concrete discharge chamber and weir chamber. And upsizing approx 250m of the local sewer network with pipes ranging from 300mm to 750mm diameter complete with 9 manhole chambers followed by the abandonment of the existing sewers.

Finally a permanent grass paving system for HGV access was laid across the entrance and around the new underground detention tank.

Click here to see the project details


Arnold Close, Dukinfield

Arnold Close - 10.30m Diameter Shaft

This project was undertaken direct for United Utilities to take 4 local properties off the flood register.

Donegan constructed a 10.30m shaft approx 6m deep to act as a surface water detention tank within the local golf course.

There was also approx 550m of both surface and foul water sewers to be upsized, ranging from 225mm upto 1200mm diameter, constructed online down small residential roads.

There was also a 450mm diameter augerbore approx 30m length under the entrance to the golf course club house to reduce any disruption.

To prevent disruption to the local residents and primary school during construction the working area was kept to a minimum as it progressed up Tennyson Avenue.

Click here to see the project details


Cookesmere Lane, Sandbach

Cookesmere Lane, Sandbach

Donegan Civil Engineering were appointed as the main contractor on this United Utilities project.

When completed the scheme would take a total of 18 houses in the local area off the flood register.

The works included the construction of a new 6.00m diameter shaft which would act as a foul sewage detention tank / pumping station and a 4.00m diameter CSO chamber incorporating a powered screen.

There was also approx 165m of 525mm and 450mm on-line sewer replacement both in the residential roads and from the new CSO through an adjacent field to an outfall into a local water course.

After the main construction works were completed and the new system was operational the existing pumping station and CSO were demolished, then a permanent grass paving system for HGV access was laid across the entrance and around the new underground detention tank.

Click here to see the project details


Newlands Court, South Shields

25m diameter detention tank at Newlands Court

This project was carried out for Seymour Civil Engineering Contractors, on a Northumbrian Water project.

A 25.00m diameter shaft was underpinned to a depth of approx 12m in good firm clays and would provide over 4,000m3 / 4 million litres of foul water storage capacity.

Once excavation had reached formation level and all the rings had been built grouted and caulked a mass concrete plug was poured.

Once the concrete in the plug had cured the steel reinforcement was installed for the concrete base slab, with starter bars protruding for the 4 no. concrete support columns, as shown in the picture on the right, for the pcc cover slab.

Click here to see the project details


Blackpool Coastal Protection Scheme

Blackpool

Donegan were awarded 2 sub-contracts on the works along Blackpool seafront by Birse Coastal.

The first involved constructing an 8.00m diameter shaft within a sheet piled cofferdam approx 9m deep. This method was utilised due to the ground being made up of granular fill and the tidal water pressure.

Other work in this package included open-cut drainage, with pipes of various sizes and a number of manhole chambers, again in sheet piled pits up to 7m deep. And finally the construction of an insitu reinforced concrete valve chamber.

The second package of work involved constructing a new outfall for the existing pumping station. This entailed lifting in 14 precast culvert units, approx 3.4m height x 5.4m length x 1.4m width and each weighing 32 tonne.

Insitu work was then required to finish off the outfall onto the seafront and to tie into the existing structure. Finally 2 RC support beams, each weighing approx 40 tonne, were lifted into place and precast slabs placed on top to support the finished pavement surface.

Work on the outfall was dictated by the tide and so Donegan operatives worked alternating shifts through the day and night to finish the works.

Click here to see the project details


Darwen WwTW & Clarence Street UID`s, Lancashire

Darwen UID

This project was carried out by Donegan Civil Engineering direct for United Utilities.

The scope of works involved the construction of a 15.00m diameter shaft, sank by caisson, approx 15m deep which will act as a detention tank / pumping station with over 1,000m3 capacity for foul water.

The detention tank was then fitted out with 2 storm pumps and a scavenger pump that would feed into a set of twin 200mm diameter rising mains approx 200m in length.

Also a 12.50m diameter shaft was underpinned, to a depth of approx 10m, around an existing 4.00m diameter tunnel to act as an CSO chamber within which a powered screen was installed.

There was also approx 500m of opencut gravity sewers ranging from 450mm to 750mm diameter upto a depth of 4m, along with a number of manholes, insitu RC chambers and finally an outfall structure that was built within the embankment of the river.

Click here to see the project details


Croes Atti, Flint, Wales

TBM for Croes Atti ~ Rail Crossing

This project was carried out for Costain, on behalf of Welsh Water.

Shown in the picture on the right is the 1200mm internal diameter Iseki ’Super-Unclemole’  TBM prior to undertaking a 40m drive underneath the Chester-Holyhead Railway Line.

Other works required to carry out the crossing included sinking a 6.00m diameter drive shaft, approx 8m deep, and a 4.00m diameter reception shaft, approx 7m deep, constructed on either side of the Chester-Holyhead railway line in difficult ground conditions comprising very wet clays with large boulders.

Click here to see the project details


Courtaulds Sewer, Preston

Courtaulds Sewer Requisition Scheme, Preston

This project was carried out on behalf of Balfour Beatty, for United Utilities.

The aim of the works were to fix part of the damaged existing foul sewer which was flowing into the River Ribble after the bank had collapsed.

It involved the stabilisation of a bank on one side of the River Ribble with over 400m of pre-driven permanent steel sheet piling, re-construction of over 400m of the sewer system and new cycle track / pedestrian walkway.

Click here to see the project details


Paradise Street, Liverpool

Paradise Street, Liverpool

This project was carried out  for Laing O’Rourke on the major development works in Liverpool city centre.

Donegan Civil Engineering installed over 400 linear metres of 8m long Larsen steel sheet piles to form a 200m long, 6m wide, 6m deep trench.

Inside the trench a concrete slab was poured to act as a working platform during the steel fixing, formwork erection and casting of a 3m by 3m insitu reinforced concrete culvert.

Other works on the scheme included over 600m of foul water open-cut drainage, a 4.50m internal diameter CSO chamber and a 1500mm internal diameter pipejack.

Click here to see the project details


Upperpassmonds Road, Rochdale

Upperpassmonds Road

This project was carried out on behalf of Balfour Beatty, for United Utilities.

It involved the caisson sinking of a 10.30m internal diameter segmental shaft approx 15m deep through wet sandy clays.

A 762mm diameter steel pipe installed by augerbore approx 30m length was used to connect the shaft to the existing sewer network.

A timber heading approx 20m length was then undertaken to install a section of the rising main with the remaining 30m completed in opencut.

There was also 170m of 600mm diameter concrete pipes installed along the adjacent road as on-line replacement of the existing combined sewer, which also involved constructing 8 new manhole chambers.

Finally the compound area was reinstated and converted back into a car park, which involved reconstructing a stone wall, kerbing and macadam surfacing.

Click here to see the project details


Brunswick Road, Altrincham

Brunswick Road, Altrincham

This project was carried out on behalf of Balfour Beatty, for United Utilities.

The project was a flood alleviation scheme, and the photographs show the construction of a 20.00m diameter shaft which will act as a storage tank in times of heavy rainfall.

You will note that the upper part of the shaft is supported by pre-driven steel sheet piles. This method was employed due to the anticipated unstable ground conditions within the top 9.00m depth of the shaft.

On completion the shaft was approx 20m deep and provided over 5,000m3 / 5million litres of storage capacity for storm water.

Click here to see the project details


Crow Lane, Chesterfield

Crow Lane, Chesterfield

This project was carried out in partnership with E.T.M. for Yorkshire Water.

The Contract included the sinking and construction of a 15.00m diameter shaft to a depth of approx 25 meters, giving over 3,500m3 / 3.5million litres of storage capacity for storm water.


Langdale Way, Frodsham

Langdale Way, Frodsham

This project was carried out on behalf of Balfour Beatty, for United Utilities.

The Contract included the sinking and construction of a 20.00m diameter shaft approx 17m deep, and a 9.00m diameter shaft approx 10m deep, within the playing field of a primary school.