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September 18, 2018
Jenkins Marine have been working for Weymouth Harbour commissioners and the RNLI to undertake maintenance dredging within Weymouth harbour. Dredging has been requested for various areas including under the all-weather lifeboat berth where the existing mooring pontoon is currently removed for maintenance works.
The Self-propelled Spud Leg Pontoon Utility Vessel Doreen Dorward led operations with the assistance of split hopper barges NAB and Needles which were used to transport the spoil to the Swanage disposal site.
The dredging vessels attracted quite a crowd whilst filling the main navigational channel and dredging in close proximity to the historic lifting bridge. Close co-operation was required with the local harbour authority and other harbour users.
Keith Howorth, Weymouth Harbour Master said:
Many thanks to you and your team for a great job here in Weymouth this week. It was a pleasure to work with your team who were professional, cooperative and understanding of our harbour and it’s users.
July 6, 2018
Jenkins Marine’s Dredging equipment has been kept busy this summer working near Fleetwood. 30m x 9m Backhoe Dredger ‘Doreen Dorward’ fitted with our 48t long reach excavator, and self propelled 300m3 capacity split hopper barge ‘NAB’ have been working for Specialist Marine Civil Engineering Firm ‘J. Murphy’ to provide dredging assistance for the installation of a large wastewater outfall in Anchorsholm.
Both vessels have been working 24/7 from May through to Early August to get the project completed on schedule. The project has had some problems prior to Jenkins’ arrival. Last summer when the final section of outfall had been installed severe weather came in and caused extensive damage, and moving the position of the newly installed outfall. Due to the nearshore working environment, the work vessels are very sensitive to weather, and the decision was made to postpone repair work until after the winter.
After a winter’s weather washing over the outfall the first task this year was to use the Doreen Dorward to uncover the 620m long damaged inshore section of outfall where buried. The outfall was some 2m diameter and weighed down with 26t saddle weights at regular 5.5m spacings. A submersible ‘Bell pump’ was fitted to our excavator and used to dredge around the weights, without the risk of damage from the excavator bucket, to enable use of divers to unbolt the 24 saddle weights from this section of pipe. This technique was also used to uncover the flange joint s on the outfall where connections had to be released and re-made. To enable the precise positioning of the dredger on the job a 3D RTK GPS Prolec dig system was installed to the excavator. Other works included the re-dredging of the trench once the damaged section of outfall had been removed to restore the original design profile of the trench, which was 5m below seabed level, and the re-burring the outfall following installation.
Spit barge ‘NAB’ was used to take spoil away from the outfall during dredging operations, and place spoil back on top of the outfall during backfill operations. To facilitate backfill operations a precision GPS survey spread was installed on the NAB to ensure the barge was exactly over the outfall prior to discharging the hopper over the outfall.
June 5, 2018
May 3, 2018
Jenkins Marine’s Multi-Cat AVON is currently back assisting in the recovery of the historic HMS Invincible. Bournemouth University are working in partnership with MAST (Marine Archaeology Sea Trust), with funding from central government, to recover artefacts from the historic ship. The operation is vital as the wreck is becoming exposed by the natural migration of the sand bank which had until now protected the site. Avon was on hand last year to help with the start of this historic salvage operation.
Jenkins Marine have previously worked with Bournemouth university on the historic ‘Swash Channel Wreck’ in the entrance to Poole harbour and AVON was selected for this latest delicate work due to her large working deck area, deck crane, maneuverability and accommodation facilities.
Jenkins Marine Director Dan Jenkins said:
“Offering shallow draft, deck crane, spud legs, and substantial deck space and load capacity, Avon is ideally suited to carry out this kind of diving and salvage support work“.
Built by the French in 1744 and captured by the British on the 3rd May 1747, HMS Invincible remains are highly significant both historically and archaeologically.
Works commenced end of April and are due to run for two months, to complete around the end of June/early July.
You can read more about this unique salvage operation at: www.thisismast.org/projects/hms-invincible.html
April 2, 2018
From Georgia With Love… CM2007…Jenkins Marine are delighted to announce the addition to its fleet of a 50m x 14m flat top spud leg pontoon, ‘CM2007’ following its purchase and recent arrival from Georgia.
Following inspection and purchase of the pontoon in Georgia this February, CM2007 has been in transit under tow back to Jenkins Marine UK headquarters in Poole. This has taken a remarkable 50 days following significant delays due to bad weather conditions. The pontoon arrived in Poole in early April, and the team at Poole have worked non-stop to install fendering and handrails to the vessel ready for it’s first charter with Jenkins Marine as new owners.
CM2007 was built in 2007 by Dutch shipyard ‘Neptune’, and is a sister vessel to Jenkins Marine’s other 50m x 14m pontoon ‘JML 50’. She has an impressive 1,300t deck capacity together with pockets for 2no. 610mm diameter spud legs.
Jenkins Marine Director Dan Jenkins said:
“I am very pleased to report that following inspection and delivery the pontoon is in excellent condition and has current BV loadline certification, and is ready to go to work!.“
The pontoon is already booked on a 6 month bareboat charter to work for joint venture company ‘FLO’ on the Thames Tideway project, on the River Thames.
March 5, 2018
Jenkins Marine Smaller Dredge team have been busy dredging local back in Poole with maintenance dredging over three different marinas and boat parks.
Dredge pontoon JML60 (18m x 6m) has been fitted with a 22t excavator, which has been loading 150m3 capacity split hopper barge ‘HURST’. Workboat ‘Buffalo’ has been used to push the Hurst to the sea disposal site within Poole Harbour, benefitting from its recently upgraded higher horsepower engines. These dredging works, like many of our dredge projects, have required careful planning. To access dredge areas with the relatively large dredging vessels requires parts of a marina to be taken apart, with finger pontoons removed, and in this case pontoon piles extracted as well.
Working in several different areas of marinas also means completing one area, only to be faced with a period of standing time waiting for it to be put back together, boats to be moved back, and then the next area to the cleared of pontoons. As a result we have been back and forth between these dredge sites, with a total dredge estimated in the region of 10,000m3. Works started in January, and are due to complete before Easter 2018. In addition to the dredging works, Pontoon removals and repairs have been required, together with piling works for approximately 15no tubular piles; either new, replaced or extracted and re-driven. Capable workboat STOUR has been used for the piling works, utilising its powerful 68t/m deck crane, and a combination of percussive and vibratory piling equipment.
February 12, 2018
Its time for our Winter Dredging Roundup. It’s been a busy winter for the Jenkins Dredge team…
Since the Nab and Needles returned from Scotland in September 2017 they haven’t stopped! The Doreen Dorward, Nab and Needles started a maintenance dredge in September for Dean and Reddyhoff Marinas at Haslar Marina (just inside Portsmouth Harbour entrance, and opposite the iconic Spinnaker tower), of over 30,000m3. Spoil had to be loaded and transported to sea near the Nab Tower disposal ground off the Isle of Wight. This was completed in November, and followed by some vessel maintenance works back in Poole.
Early December saw us start work in Plymouth for the Yacht Haven’s group using our new 48t long reach excavator. Dredging was required to bring sea bed levels back to original depths at Plymouth Yacht haven, Yacht Haven Quay and Turnchapel Wharf, with an estimated total dredge of 75,000m3. Disposal of dredged spoil is to the newly opened Plymouth Deep sea disposal site outside the approach to Plymouth Sound, which has been closely monitored by the MMO (facilitated by AIS tracking devices on all Jenkins Vessels).
Works here are still ongoing in Plymouth, and due to completed just before Easter 2018, ready for the start of the boating season!
January 14, 2018
We are delighted to report Specialist Barge Hire Booming at Jenkins Marine.
Pontoons JML50 (50m x 14m x 3m) and JML36 (36m x 10m x 3m) have been on bareboat charter to Marine Civil Engineering Contractors BAM Nuttall. BAM are renovating the Oikos Jetty near Canvey Island, a bulk liquid storage facility constructed in the 1930’s, and requested the charter of both barges for a total period of 40 weeks to cover the duration of the main works on site. Both Barges have been supplied with 20m long spud legs.
JML36 is being used as a berthing pontoon for the support vessels on site, while JML50’s larger 1300t capacity is more suitable for transport of construction materials and equipment. Works are anticipated to continue until summer 2018.
December 12, 2017
Jenkins Marine apprentice Jon and his mentor Chief Engineer Andy are shown above “passing the spanner” whilst working on main engine replacement for 14m multirole vessel ‘Buffalo’
Buffalo previously had 2 x 160hp L136 naturally aspirated Doosan engines, and is currently being upgraded to 2 x 200hp L136T Doosan engines, to give the vessel increased power, speed and bollard pull. The first new engine has been installed, and the second new has just been delivered and Jon is pleased to be involved in the replacement of this unit, from removal of the old engine, transfer of the gearbox and other components, and installation and commissioning of the new engine.
Jon joined the company in late November 2017 as our new Apprentice Marine engineer is able to combine his ‘on the job training’ in the workplace with block release at college where he is studying a 4 year advanced level NVQ in Marine engineering.
Jon’s placement demonstrates our continued commitment to training young people and bringing them into the commercial marine industry.