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  • #46
    PROJ/2017/0004 - Remedial and Upgrade Works to Spencer Jetty at Haulbowline Naval Base

    Repairs to concrete structure, strengthening works to steel piles, protective coatings to concrete structure and steel piles, fendering system and wharf fixtures ( Further details contained in the Works Requirements).

    Works Requirements for Remedial and Upgrade Works to Spencer Jetty
    MALONE O’REGAN Consulting Engineers 17
    SECTION 1 - GENERAL
    1.1 General
    Spencer Jetty at Haulbowline Naval Base comprises a 132m length of berthing
    and mooring facilities to the north west of the entrance to the Dockyard Basin.
    The jetty has fallen into disrepair and is currently not in use.
    The Jetty was constructed in two phases:
    Original Jetty, comprising reinforced concrete beams and slabs spanning to
    primary beams and supported on piles. It is probable that strengthening works
    were undertaken to this section of the jetty at approximately the same time as the
    jetty was extended.
    Jetty Extension, comprising reinforced concrete slabs and flat slabs spanning to
    beams and concrete filled steel piles.
    The existing structures are in a poor condition. Concrete discolouration, cracking
    and spalling has occurred on beam soffits, beam ends, and in places on slab
    soffits.
    Reinforcing bars have been exposed by spalling concrete and signs of corrosion
    are visible.
    The supporting steel piles are also corroded and in places quite severely
    corroded in particular in the low water and splash zones
    An investigation carried out by BHP Laboratories in April/May 2018 demonstrated
    that 3 out of 36 individual tests carried out on samples taken from 15 locations
    record chloride content in excess of the maximum allowable percentage of 0.4%.
    The investigation also found that the steel piles had suffered from corrosion and
    that remaining pile wall thicknesses measured varied considerably. Average wall
    thicknesses recorded at low water showed an estimated 52% reduction in pile
    wall thickness.
    1.2 Description of the Works
    The Department of Defence intends to carry out remedial works to prevent further
    deterioration of Spencer Jetty and also basic upgrading works to allow the Jetty to
    be used as a lay-off and short-term berth for navy vessels.
    The scope of works will include:
    - Repairs to the reinforced concrete structures
    - Repairs to the steel piles
    - Application of protective coatings
    - Installation of piling for the new fender system
    - Provision of bollards, ladders, rails and temporary services
    - Provision of cathodic protection

    ...etc

    For now, everything hangs on implementation of the CoDF report.

    Comment


    • #47
      [QUOTE=na grohmiti;481332]PROJ/2017/0004 - Remedial and Upgrade Works to Spencer Jetty at Haulbowline Naval Base

      Repairs to concrete structure, strengthening works to steel piles, protective coatings to concrete structure and steel piles, fendering system and wharf fixtures ( Further details contained in the Works Requirements).

      A few things to note about Spencer Jetty as was. For a Naval Ship to ENTER the Basin the preferred option was that the Jetty be clear AND only enter on a Flood Tide. The danger was, on an ebb you could be set down on a concrete dolphin on the eastern entrance, whereas on the flood the set would be onto the Jetty. Experienced captains did squeeze in past small vessels but it wasn't SOP. A Naval jetty will need a strong jetty deck able to take loads up to mobile crane and road tanker sized weights. I note the security clearances and 12 day notification of names of workers to the site, while a few yards away there will be open house for visitors to the Park.

      Comment


      • #48
        The park hasn't opened, and won't open for some time by the sound of it. Hopefully it will end up like the Camp Field in Collins barracks and remain available for members of the NS only.
        Click the link I provided and have a look at some of the drawings.
        The Plan seems to have Spencer as a lay-by jetty for ships either about to leave or about to enter the basin. I.e the ship on Sailing Order goes to Spencer, instead of taking up space on either the Oil wharf or within the basin, or as is currently the case, On the Deepwater in Cobh. Also gives some comfort perhaps to larger ships in future, arriving at the wrong tide can wait at Spencer to cross the Basin sill safely.
        It seems to be phase 2 of the Regeneration plan for the Island. Phase 1 was reopening the West wall to ships, providing proper lighting, shore power, water, pedestrian and vehicular access, secure parking.
        i. To provide suitable vehicular and pedestrian access for embarkation and disembarkation of stores, necessary logistic and maintenance support and safe transit of personnel.
        ii. The introduction of bollards, fendering, ladders and steps certified to meet current and future ship needs.
        iii. The establishment of required shore power, CIS connection and quay wall lighting.
        iv. The development of a sludge discharge and fresh water intake facility.
        v. The introduction of a new crash barrier and ancillary life buoys.
        vi. Investigate and undertake dredging of the berth if required.
        vii. Surface dressing of the jetty.
        Phase 3 is very exciting, and hopefully even part of what is proposed comes to fruition.
        (1). Phase 3 is to provide for the development of a secure compound for controlled stores to include ordnance, ammunition, weapons, clothing and CIS requirements. The secure compound will require fencing, CCTV, security personnel and a guardroom.
        (2). Phase 3 will also deliver an area for strategic storage. Works to include a storage and staging platform to meet National requirements such as storage of equipment and transport prior to overseas deployment.
        (3). Phase 3 will also provide a ceremonial ground, between Block 9 and the West Wall, forming the heart of Haulbowline Island centrally positioned between the Naval Base and Naval Dockyard, opening up views of Cobh and Spike Island.
        (4). A ceremonial jack staff (flagpole) will require to be introduced at the northern end of the ceremonial parade-ground.
        A lot of phase 3 ties in with proposed use for the P31 replacement, notwithstanding the frequent transport of vehicles and stores to and from nearby Ringaskiddy.
        For now, everything hangs on implementation of the CoDF report.

        Comment


        • #49
          Originally posted by na grohmiti View Post
          The park hasn't opened, and won't open for some time by the sound of it. Hopefully it will end up like the Camp Field in Collins barracks and remain available for members of the NS only.
          Click the link I provided and have a look at some of the drawings.
          The Plan seems to have Spencer as a lay-by jetty for ships either about to leave or about to enter the basin. I.e the ship on Sailing Order goes to Spencer, instead of taking up space on either the Oil wharf or within the basin, or as is currently the case, On the Deepwater in Cobh. Also gives some comfort perhaps to larger ships in future, arriving at the wrong tide can wait at Spencer to cross the Basin sill safely.
          It seems to be phase 2 of the Regeneration plan for the Island. Phase 1 was reopening the West wall to ships, providing proper lighting, shore power, water, pedestrian and vehicular access, secure parking.


          Phase 3 is very exciting, and hopefully even part of what is proposed comes to fruition.

          A lot of phase 3 ties in with proposed use for the P31 replacement, notwithstanding the frequent transport of vehicles and stores to and from nearby Ringaskiddy.
          I had looked at the DWGS including the existing and proposed layout. The extended jetty is a bonus and should suit the MRV and others but we may have to accept that berthing and unberthing will be constrained by tidal direction. For all of our ships , so far, tidal height is not a big factor entering or leaving the basin after the first hour of rising tide in Springs or anytime during Neap tides. The only requirement for entry is the Flood tide.

          Comment


          • #50
            Originally posted by na grohmiti View Post
            The park hasn't opened, and won't open for some time by the sound of it. Hopefully it will end up like the Camp Field in Collins barracks and remain available for members of the NS only.
            Click the link I provided and have a look at some of the drawings.
            The Plan seems to have Spencer as a lay-by jetty for ships either about to leave or about to enter the basin. I.e the ship on Sailing Order goes to Spencer, instead of taking up space on either the Oil wharf or within the basin, or as is currently the case, On the Deepwater in Cobh. Also gives some comfort perhaps to larger ships in future, arriving at the wrong tide can wait at Spencer to cross the Basin sill safely.
            It seems to be phase 2 of the Regeneration plan for the Island. Phase 1 was reopening the West wall to ships, providing proper lighting, shore power, water, pedestrian and vehicular access, secure parking.


            Phase 3 is very exciting, and hopefully even part of what is proposed comes to fruition.

            A lot of phase 3 ties in with proposed use for the P31 replacement, notwithstanding the frequent transport of vehicles and stores to and from nearby Ringaskiddy.

            Spencer Jetty wih a length of 132m + overhang and the proposal of Phase 3 is a good indicator of the berth being used for not only loading/unloading the MRV but all ships for present and future containerised systems (diving, MCM, UAS etc).

            Comment


            • #51
              Is there still proposals to use Block 4 for accommodation? (With some imaginative engineering it would be achievable).
              For now, everything hangs on implementation of the CoDF report.

              Comment


              • #52
                Originally posted by na grohmiti View Post
                Is there still proposals to use Block 4 for accommodation? (With some imaginative engineering it would be achievable).
                Block 8 is due to be upgraded shortly for accommodation for SLI personnel afloat.

                Block 9 is to follow after that is completed subject to funding, not planned for accommodation however.

                No plans for Block 4 in the medium term. Its structural condition has deteriorated further since the bracing went up. If i was betting man i could see if being knocked due to H&S concerns.

                Comment


                • #53
                  That would be a shame. Because you know like block 10 it would be left idle for evermore if demolished.
                  For now, everything hangs on implementation of the CoDF report.

                  Comment


                  • #54
                    Originally posted by na grohmiti View Post
                    That would be a shame. Because you know like block 10 it would be left idle for evermore if demolished.
                    Large iconic building, photographed and recorded in all dimensions and views by Heritage Buildings Ireland. It is sitting in the Oil Base and maybe unsuitable as an accommodation unit. Ok as Admin Offices and workshops with no continued o/night occupancy. Google Block 4 Haulbowline Island. The fire escapes show the difficulty with old buildings.I would think H&S would be sceptical of all those cars and portacabins that have sprung up in the Oil base.

                    Comment


                    • #55
                      Originally posted by ancientmariner View Post
                      Large iconic building, photographed and recorded in all dimensions and views by Heritage Buildings Ireland. It is sitting in the Oil Base and maybe unsuitable as an accommodation unit. Ok as Admin Offices and workshops with no continued o/night occupancy. Google Block 4 Haulbowline Island. The fire escapes show the difficulty with old buildings.I would think H&S would be sceptical of all those cars and portacabins that have sprung up in the Oil base.
                      Best option so perhaps is to rebuild it on the old footprint using modern methods, because the current situation, with what is still a protected structure, held in place by steel bracing, serves neither heritage nor practicality.
                      AGS/OPW managed it in Templemore in the late 80s, building new single occupancy accommodation within the footprint of the standard military barrack block, using little of the old (derelict through non use rather than fire) structure apart from some key stones over doorways. The Character, aspect and heritage is preserved, though the building is not. At present of the 6 Georgian storehouses, only 2 are in use, with the rest in varying stages of dilapidation.
                      For now, everything hangs on implementation of the CoDF report.

                      Comment


                      • #56
                        Interesting report on future use of Haulbowline 2011

                        Comment


                        • #57
                          Originally posted by DeV View Post
                          Interesting report on future use of Haulbowline 2011
                          https://www.yumpu.com/en/document/re...bowline-island
                          It is amazing that such a small piece of real estate should have been treated so shabbily and allowed to be infected and contaminated in the interests of progress. Despite declaring the island East as reclaimed land, it was done in our prehistory by the Brits almost 170 years ago, and is as much part of the Base as the West end. The Navy cannot function without it, and going forward there should not be any external inputs or choices on its future. Unfortunately politicians are prone to pre-emptive strikes and obtaining good media coverage. We need the island, berthage, and a good drydock.

                          Comment


                          • #58
                            Originally posted by Goldie fish View Post
                            Request for Proposals

                            for the Supply to the Irish Naval Service of

                            Tactical Radar Systems




                            JN/260/2012 - TACTICAL RADAR SYSTEMS


                            Issued by the Naval Service, Ireland

                            Ref No: JN/260/2012


                            The following is a Request for Proposals (RFP) for the provision of an S-Band Tactical Radar system for Irish Naval Ships in 2012. The Naval Service may also, but is not obligated to, avail of this tendering process to procure additional S-Band and X-Band Tactical Radar system(s) for Irish Naval Ships in 2013 and 2014 respectively. The contracting authority is the Minister for Defence, Ireland.

                            Statement of Requirement

                            The requirement exists for the provision of a Tactical Marine Radar System to replace and interface with existing Irish Naval Service Marine Radar systems.

                            Specifically, the requirement is that all installs must be capable of taking control of, and be controlled by, the ship’s existing tactical displays. The S-Band system must fully utilise solid state technology and must NOT to be based on magnetron technology. The X-Band system must be a conventional down-mast magnetron based system. The existing systems fitted on NS ships are Kelvin Hughes Tactical Manta Display and Kelvin Hughes Mark 7 X-Band Down-mast transceiver.

                            There is also a requirement for five days technical training to be provided for six technicians. The procured equipment will not be available for technical training. The supplier will be required to provide a complete operating system for instruction, fault finding and diagnostic work. Technical training must qualify the students to install and carry out maintenance on the system to at least board level.

                            Procurement timeline:
                            • In 2012
                            Solid State S-Band Transceivers and scanner/array: Qty Required 2
                            Associated remote controlled switching equipment: Qty Required 2
                            Tactical Displays: Qty Required 1



                            With the option of:
                            • In 2013
                            Solid State S-Band Transceivers and scanner/array: Qty Required 1
                            X-Band Conventional Magnetron Transceiver: Qty Required 1
                            Associated remote controlled switching equipment: Qty Required 1
                            Tactical Displays: Qty Required 2
                            • In 2014
                            X-Band Conventional Magnetron Transceiver: Qty Required 2
                            Tactical Displays: Qty Required 2
                            In today's Navy News, using standard RN installed surface radar, coupled with a new Bathymetric software, HMS Magpie was able to do a complete underwater survey of Portsmouth Harbour approaches in about two hours. In old sounder type survey it would have taken more than two weeks. Using radar ranges coupled with differences in wave heights generated by wind, the system can see the depths and shallows without having to sail directly over them. Ideal for areas effected by earthquakes, weather disasters, beach landings, or uncertain chart data. HMS Magpie is a small vessel for the type of SuRadar required , so they fitted one on a roof rack for the interim. I'm a bit shocked that we are using Conventional Magnetrons as they are very jammable. When I was in Phillips Signaal Henglo in 1984 the radars for the RN Frigates were using Travelling Wave Tubes ( TWT) and the associated computers were made in Galway.

                            Comment


                            • #59
                              Worth noting that HMS Magpie was built in Cork, and a similar vessel is in use by INFOMAR here.
                              For now, everything hangs on implementation of the CoDF report.

                              Comment


                              • #60
                                Originally posted by ancientmariner View Post
                                In today's Navy News, using standard RN installed surface radar, coupled with a new Bathymetric software, HMS Magpie was able to do a complete underwater survey of Portsmouth Harbour approaches in about two hours. In old sounder type survey it would have taken more than two weeks. Using radar ranges coupled with differences in wave heights generated by wind, the system can see the depths and shallows without having to sail directly over them. Ideal for areas effected by earthquakes, weather disasters, beach landings, or uncertain chart data. HMS Magpie is a small vessel for the type of SuRadar required , so they fitted one on a roof rack for the interim. I'm a bit shocked that we are using Conventional Magnetrons as they are very jammable. When I was in Phillips Signaal Henglo in 1984 the radars for the RN Frigates were using Travelling Wave Tubes ( TWT) and the associated computers were made in Galway.
                                Didn't the RN do something similar with Beiruit port after the explosion last year?
                                'He died who loved to live,' they'll say,
                                'Unselfishly so we might have today!'
                                Like hell! He fought because he had to fight;
                                He died that's all. It was his unlucky night.
                                http://www.salamanderoasis.org/poems...nnis/luck.html

                                Comment

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