Tipner Lake

September 2018

The project is now in its 74th week and we are pleased to update you with our progress:

Construction of the sea wall continues, covering 100m of bases and 80m of encasement walls in the last month. Significant development has been made by Hilsea Lido with the Northern Slipway providing access to the harbour as well as the Southern Slipway by Spinnaker Drive.

Earthworks have progressed significantly by the Mountbatten Centre and Alexandra Park. Soil has been placed and compacted ready for the finished level tarmac to be installed.

Lamppost columns and textured floor slabs are key features which have been installed by Mountbatten car park.

Temporary sheet pilling up to the allotment have been removed and foreshore material has been gradually drawn back.  Restoring foreshore material to its original state.

Timber cladding has been installed on the terrace seating as seen in the photo below.

Knights Brown have created this wonderful YouTube video displaying all the work completed up until now.

August 2018

The project is now in its 68th week and we are pleased to update you with our progress.

As works progress more activity will be seen in the north by Hilsea Lido, with sheet pilling, excavation and instalment of stepped revetment taking place.  As school holidays have started and the great weather is set to continue we understand the leisure facilities in this area will be busy, therefore we intend to keep both noise and dust to a minimum to avoid any disturbance.

Reinforced Concrete work has continued to progress efficiently with work reaching as far as the Hilsea Lines.  This marks almost 400m of wall completed in the northern section since the start of the works in April.  Another key development is the construction of the replacement northern slipway.  This is moving along in conjunction with the three access steps in the southern section. 

 

Significant progress has been made in the south with car park alignment, raising of ground level and development of social areas.

 

Road Sweeping

The warmer weather has resulted in dry conditions which are being dealt with by constant dust suppression from multiple vehicles dampening down the haul routes.  The monitoring of the public roads will continue and cleaned as and when it is needed.

Site Working Hours

Although weekday working  hours are permissible 7am – 11pm, our current core working hours are between 7am and 7pm.  For the next few months works will also take place on Saturdays from 7am – 3pm. Occasional concrete finishing works will take place until early hours, but no noisy activities are permitted during this time. These works are being supervised accordingly to ensure disruption is kept to a minimum. 

Thank you for your continuing support. Should you have any further  questions about the progress of the scheme, please do not hesitate to contact the  Eastern Solent Coastal Partnership by  email: coastal.team@havant.gov.uk 

July 2018

The project is now in its 64th week and we are pleased to update you with our progress:

Site Works

Significant progress has been made with the wall construction, focused adjacent to the allotments, this includes 300m of bases and 80m of wall.  To the south, the predominant work taking place, is levelling and compacting the sub-bases to form the foundations for what will be the shared foot and cycle path.  Amongst this there are two key social spots, the tiered seating with a view of Porchester castle and the “Welcome to Tipner”, are well underway.  Large sections of wall construction have been finalised, marked by the foreshore material being returned to its natural state against the sea wall.

 

Nesting Swans

The signets hatched towards the end of May and have now vacated the nest, allowing works to recommence without the risk of disturbing a protected species.  The nesting period was later, than typical, due to the cold spells experienced in Spring.

Road Sweeping

The warmer weather has resulted in dry conditions which are being dealt with by constant dust suppression from multiple vehicles dampening down the haul routes.  The monitoring of the public roads will continue and cleaned as and when it is needed.

Site Working Hours

Although weekday working  hours are permissible 7am – 11pm, our current core working hours are between 7am and 7pm.  For the next few months works will also take place on Saturdays from 7am – 3pm.  These works are being supervised accordingly to ensure disruption is kept to a minimum. 

Thank you for your continuing support. Should you have any further  questions about the progress of the scheme, please do not hesitate to contact the  Eastern Solent Coastal Partnership by  email: coastal.team@havant.gov.uk


June 2018 

Site Works

The work on site has progressed very well in the last month. Concrete pouring has begun for the bases of the encasement wall between Spinnaker Drive and Hilsea Lido. This is a 3 step process – the first concrete pour is called ‘blinding’ and this levels the excavation; the second is the first structural concrete pour to form the base of the wall; the third is the wall section.

The concrete work is continuing along the Alexandra Park frontage with only a handful of gaps to be closed.

Site Working Hours

Although working  hours are permissible 7am – 11pm, current core working hours are between 7am and 7pm. These works are being supervised accordingly to ensure disruption is kept to a minimum.

Landscaping

The hard landscaping work has started. So far, we have raised land in some areas and poured the foundations for the tiered seating area.  When it is completed this will provide a lovely view across the lake, under the M275 bridge, to Portchester Castle.

Road Sweeping

The warmer weather has resulted in dry conditions which are being dealt with by constant dust suppression from multiple vehicles dampening down the haul routes.  The monitoring of the public roads will continue and cleaned as and when it is needed.

Thank you for your continuing support. Should you have any further questions about the progress of the scheme, please do not hesitate to contact the  Eastern Solent Coastal Partnership by  email: coastal.team@havant.gov.uk

Tipner Lake Progress Update – February 2018 Permanent Works update during the winter working period

The ongoing winter working period has yielded great success, with over 260m of wall, 400m of base and the new Lower Wade Way slipway being constructed. With the wall coming together, it can now be viewed while crossing the Western entrance to Portsmouth via the M275. In March, the work will extend to the Northern frontage, between Spinnaker Drive and the Lido, which will be closed off to the Public until the completion date in Autumn 2019.

Despite some heavy rainfalls we have been staying ahead of the mud through regular road sweeping and by laying down bark in the more desperate spots of Alexandra Park.

During the winter months, an ornithologist has been monitoring the over wintering birds to ensure that the works are not affecting their annual feeding habits. To date, only good news has been reported with regular sightings of over 300 Brent geese a day. As well as Black-tailed Godwits which have been tracked all the way from Iceland

 

 

Tipner Lake Progress Update – September 2017

Permanent Works

The piling work between the Mountbatten Centre and Spinaker Drive is now complete! The next stage of construction has begun, with steel reinforcement being assembled on site and placed using large cranes between the two rows of sheet piling. The bespoke steel formwork is then constructed around this allowing concrete to be poured in-situ.  The first concrete pours have been carried out and we are really pleased with the results as the wall is now beginning to take shape.

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Winter Working 

As work has progressed on site, the team have encountered unforeseen conditions which have hampered progress during the first year of construction.

To help keep the project on its original programme, approval has been given for continued working through the winter from Natural England, Marine Management Organisation (MMO) and PCC Planning.  

This will allow us to continue to work between October and March pouring the new concrete seawall at the northern and southernmost ends of the current site.   During the winter the work will be monitored to ensure there are no adverse effects on the bird population in the lake.

Cycle/Foot path Closure

The coastal footpath/cycleway between the Mountbatten Centre and the end of Spinnaker Drive has been closed for the duration of the coastal defence works and was originally due to be reopened on 1st October 2017.

For the works to continue throughout the winter we will require continuous access to the frontage, and therefore public access will remain suspended.

The existing diversion along Northern Parade (Twyford Avenue to Portsbridge Roundabout) will remain as the main access route for cyclists and pedestrians.  The informal access through Alexandra Park will still be in place between Alex Way/Mountbatten Centre and Spinnaker Drive.

Moving Forwards

The site will remain as it is now until March 2018, after which we will also be closing the cycle path between  Spinnaker Drive and Ports Bridge roundabout, allowing us to construct the remainder of the frontage.

Keep Up To Date

Regular updates will be available on information boards around the site and online at www.escp.org.uk throughout construction.

Should you have any questions or would like to find out more about the scheme, please do not hesitate to contact the Eastern Solent Coastal Partnership using the email address below.

Thank you for your patience during the construction phase of the works.


Coastal defence improvements at Tipner Lake

New coastal defences are being built as part of the North Portsea Island Coastal Flood Defence Scheme which have been designed to reduce the risk of coastal flooding and erosion to the area over the next 100 years.

To increase the flood risk management in this area, the seawall height will need to be increased by approximately 1.4m from the current levels. Increasing this wall height will afford the properties in the area greater protection against coastal flooding, reducing the probability of flooding, by increasing the Standard of Protection to a 1 in 500 years, one of the highest in the country outside London.

This phase of the works will be from the Mountbatten Centre, Twyford Avenue to the Ports Creek Roundabout and will form Phase 3 of the North Portsea Island works. Construction is due to start in April 2017, with completion planned for Autumn 2019. The start of the works for this scheme was at Anchorage Park and completed in August 2016, then the Milton Common works took place and were completed in October 2016.  The remaining works will be under construction until 2022.

The existing sea wall along this stretch of frontage is in varying condition, in some places poor, and is too low to provide adequate flood protection to the area behind. In 2014, we engaged with the local community as to the preferred structural option in the area. Following feedback from this, the works will include concrete encasement of the existing wall, and in some sections, rebuilding of the existing sea wall with a new wall to provide improved defence over the next 100 years.  

There is extensive landscaping and planting designed for the land behind the wall which includes new footpaths, attractive planting designs and several social spots with seating where visitors can pause to enjoy the views of Portsmouth Harbour and the revived parkland. The coastal path will be replaced by a new 4 metre wide shared use path which will run the full length of the new wall and a network of gravel paths behind the defences will further add to the enjoyment of the area.

What is happening on site?

In April 2017 we arrived on site and began the set up works.  These included building a new temporary haul road between Alex Way and the main compound located at the north-western corner of Alexandra Park.  This road and the compound will remain in place until autumn 2018 when they will be removed and the area returned to use as playing fields.

Once the site was established we began construction of the final sea defences. This has included driving several hundred steel sheet piles that will form the foundation of the new walls. When the concrete wall is in place, these piles will be cut down and buried under the foreshore.

Over the coming weeks we shall be continuing to drive piles and starting work on the concrete elements of the wall. The reinforced concrete wall will be built in-situ using concrete brought in by road so there will be a number of concrete wagons delivering to site. However, due to the tidal conditions and the physical restrictions of the site there is a limited volume of concrete we can pour in one day, so the number of delivery wagons will be similarly limited.

When will it happen?

How will it affect me?

NPI Phase 3 Phasing Map

The construction site will be set up to ensure public safety and allow the work to progress in a safe, efficient and controlled environment.

As the site set up began in April 2017, one of the first tasks being to set up fencing along the site boundary. During the work there will be no access to the areas within the site boundary, however alternative informal routes will be available throughout construction and these are clearly signposted around the site.  Please note that these informal routes are not on surfaced paths so will not be suitable for all users.

Temporary Cycle Path Diversion

A formal diversion will follow Northern Parade for the three years of works. Local access and diversion routes will be available around working areas where possible. 

Please click here to see the cycle diversion map if you are unsure of the cycle diversion path.

The coastal footpath between Mountbatten Centre (Twyford Avenue) and the Ports Creek Roundabout will need to be closed while work is taking place. This means that the public cycleway and footpath along Tipner Lake will be out of use during construction, with diversion routes provided.

We are working closely with local groups and the Portsmouth City Council Highways team to establish a suitable alternative route during this period.


Lower Wade Way

The Lower Wade Way causeway has now been removed and its footprint will return to intertidal mudflat.  

The old causeway structure was approximately 285m in length, old and in poor condition. Maintaining this length of slipway can be costly and often encourages unwanted fly tipping in the area. 

Upon completion of the new seawall a new slipway will be constructed in the same location to maintain access to the foreshore and it will be much shorter than before and still allowing tidal foreshore access. For further information on this, please follow this link.

For additional information, please see our posters.

If you would like any further information, please email info@escp.org.uk.

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