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able_uk_-_dredging_the_tees [2024/07/04 09:27] – nefcadminable_uk_-_dredging_the_tees [2026/08/02 12:28] (current) – nefcadmin
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-====== Able Seaton Port ====== +[[Able UK - Seaton Port Dredging]]
- +
-===== MLA-2015-00334 ===== +
- +
-In 2015 Able submitted [[MLA-2015-00334]] to carry out dredging in support of the operations of Able Seaton Port.  After 12 variations the application now covers maintenance of the approach to Seaton Port, captial dredging to adapt the approach and capital dredging to alter the docks within the port. +
- +
-==== Project Background ==== +
-"Requesting new licence to replace previous one L/2012/00160/8. +
-Objective is to improve access into Able Seaton Port by deepening approach channel and maintaining access thereafter. +
-The facility is an emerging business and works will be undertaken on demand in accordance with commercial developments. +
- +
-==== Programme of works ==== +
-There is an immediate need (Q1/2017) to dredge the approach channel and holding to -6.5mCD in order to receive the Shell Brent Delta module. +
- +
-As discussed at a meeting with MMO (Adam Chumley/Matthew Kinmond) on 26/10/16, further dredging campaigns will be undertaken in response to commercial demand. +
-Volumes of material to be dredged and disposed of are given in the attached spreadsheet. +
- +
-Dredging to be undertaken on a 24/7 basis to maximise use of plant. +
- +
-Tees Bay A - Disposal of dredged silts and soft material. +
- +
-Tees Bay C - Disposal of dredged clay. +
- +
-Able Seaton Port Holding Basin and Channel - +
-  * Deepening of Seaton Channel, Seaton Channel Holding Basin and Quays 10 and 11 - Navigational dredging (capital) +
-  * Maintenance dredging of Seaton Channel, Holding Basin and Quays 10 and 11 - Navigational dredging (maintenance) +
-  * The use of Erosion Mats for mitigation purposes - Maintenance of existing works +
-  * TERRC Basin, Quays 7, 8 & 9 - Lowering of the TERRC Basin to -8.5mCD - Navigational dredging (capital) +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/MLA_2015_00334-APPLICATION-FORM.pdf|Application Form]] +
- +
-==== Variation 1 - 2017 March 15 ==== +
- +
-Removal of silt sediment on the grounding bed within the dry dock by divers using hand suction - maximum amount 700 dry tonnes. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/1/MLA_2015_00334_1-VARIATION-1-FORM.pdf|Variation Form]] +
- +
-==== Variation 2  - 2017 June 28 ==== +
- +
-MMO calculation of wet tonnes is a lower figure than applicant will remove, so request to revert to applicant requested higher wet tonnes figures. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/2/MLA_2015_00334_2-VARIATION-2-FORM.pdf|Variation Form]] +
- +
-==== Variation 3 - 2017 October 11 ==== +
- +
-Extension of the license to include to dredge the wet dock (previously dry dock) adjacent to berths 8 and 9, from present depth of 6.5 meters to 8.5 meters, to accommodate semi submersible rigs.  Request exemption from any seasonal limitations to dredging due to being with wet dock. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/3/MLA_2015_00334_3-VARIATION-3-FORM.pdf|Variation Form]] +
- +
-==== Variation 4 - 2018 February 9 ==== +
- +
-Extend license to include TERRC Basin, using a wide range of dredgers, this is necessary to allow access Quay 6 by a wider range of vessels. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/4/MLA_2015_00334_4-VARIATION-4-FORM.pdf|Variation Form]] +
- +
-==== Variation 5 - 2020 Septebmer 2 ==== +
- +
-Extension to allow the use of erosion control matting over the intertidal flats where the existing slopes will be steepened, this has also been requested of Able UK by the Power Station. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/5/MLA_2015_00334_5-VARIATION-5-FORM.pdf|Variation Form]] +
- +
-==== Variation 6 - 2020 September 4 ==== +
- +
-Correct coordinates on the license to align with real areas where work is being undertaken. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/6/MLA_2015_00334_6-VARIATION-6-FORM.pdf|Variation Form]] +
- +
-==== Variation 7 - 2020 September 14 ==== +
- +
-Include additional areas within the holding basin where an additional 30,000 tonnes of clay will be removed.  This will result in a deepening of the area within the holding basin from -9.5mCD to -13.5mCD, making this part of Quay 10. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/7/MLA_2015_00334_7-VARIATION-7-FORM.pdf|Variation Form]] +
- +
-==== Variation 8 - 2020 November 3 - accepted ==== +
- +
-Permit the use of erosion control matting, correct error in existing coordinates on the main licence for 'Able Seaton Port, Quays 10 and 11', all areas were assessed in the HRA. +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/8/MLA_2015_00334_8-VARIATION-8-FORM.pdf|Variation Form]] +
- +
-==== Variation 9 - 2022 May 6 - accepted ==== +
- +
-Widen Seaton Port Approach Channel from 85m to 100m by capital dredging around 75,000m3 of clay and silt material. So update the coordinates for the site "Seaton Port Approach Channel", to include the widened channel, amend Activity 1.2 to include an additional 145,000m3 of material and to include an -0.5m over-dredge allowance for each dredging activity (the total volumes will not change). +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/9/MLA_2015_00334_9-VARIATION-9-FORM.pdf|Variation Form]] +
- +
-==== Variation 10 - 2022 September 28 - accepted ==== +
- +
-1) Incorrect Coordinates +
-Upon review, 6no coordinates on Licence Schedules (Able Seaton Port +
-Holding basin and Channel) are to be amended correctly. +
-Historically Seaton Channel has been dredged to a depth of up to - +
-5.8mCD and a width of up to 164m. Seaton Channel joins the River Tees +
-at a location that is maintained by PD Ports at -11.7mCD (refer to +
-Admiralty Chart for Tees and Hartlepool Bays). The intersection between +
-Seaton Channel and the River Tees is formed by a slope falling (at around +
-1:3) from Seaton Channel to the River Tees. See attached drawing ASC002-00003 where the slope has been annotated. One of the original +
-objectives of the MLA was to obtain consent for lowering Seaton Channel +
-to -9.5mCD over a width of 85m up to its intersection with the River Tees. +
-The coordinates for Seaton Channel in the original MLA were specified at +
-the top of the slope connecting Seaton Channel to the River Tees. The +
-substitute coordinates submitted in Variation 10 amends the coordinates +
-so that they are located at the bottom of the slope. +
-See attached of PDF table +
-2) Incorrect Quantities +
-Following a review of the Marine licence we request the following nonmaterial corrections in addition to the coordinate corrections: +
-1.Due to historic errors, the disposal tonnages are not consistent with +
-the dredge volumes. In particular: +
-a.V3 of the Licence permitted 1,212,000 wet tonnes of clay to be +
-deposited but this have been 1.221,000T (555,000m3*2.2); +
-b.V6 of the Licence increased the permitted capital dredge volume of clay +
-in Activity 1.1 from 545,000m3 to 575,000m3 but there was no +
-commensurate increase in the permitted disposal tonnage as there +
-should have been; +
-c.V8 of the Licence increased the permitted total capital dredge volume in +
-Activity 1.1 by 145,000m3, but again there was no commensurate +
-increase in the permitted disposal tonnage as there should have been. +
-We request changes to the disposal tonnages so that they are consistent +
-with the dredge volumes. A spreadsheet is attached to evidence the +
-working. No new dredging is being requested. These are simply +
-corrections to the disposal tonnages that have occurred due to historic +
-drafting errors. +
-2.We request a change to the volumes provided in Activity 1.2 as the +
-volumes of silt and clay have been wrongly transposed from V6 of the +
-Licence and both were incorrectly identified as silt in V7. +
-3.We request that where annual volumes are specifically stated for Site 2, +
-these volumes can be carried over to subsequent years as dredging may +
-not occur every year but silt will still accumulate. +
-4.V8 allowed for Seaton Channel to be widened and a consequential +
-additional capital dredge of 145,000m3 . We advised that this would be +
-MLA/2015/00334/12 +
-Page 2 of 3 +
-silts and clays. All of the material is expected to be dredged by BHD and +
-will comprise silts/soft clays and stiff clay. We propose amending Activity +
-1.1 so that the whole of the additional dredging is classed as clay and +
-that Activity 4.1 is amended to permit the anticipated 50,000m3 of +
-silts/soft clays to be deposited in Tees Bay A. +
-5.A number of dredging methods are consented within the Licence but +
-Activity 1.1 only describes backhoe dredging, we request that the +
-methodology is extended to include TSHD which is consented for other +
-Activities. +
-6.We request a change to the text describing the methodology of Activity +
-2.1 to remove reference to 30,000T of clay which is not in any event listed +
-in the quantities for that Activity. +
-7.We request that Activity 2.3 is split into two Activities, one covering the +
-capital works and the other the maintenance works. +
-8.We request changes to the description and methodology of Activities +
-3.1 and 4.1 to remove inconsistencies in the current wording. +
-9.We request corrections to the description of the source of material +
-specified in Activity 3.1 and 4.1 +
-All of our proposed textual changes to the Licence are included in the +
-attached WORD document with the changes tracked for transparency. +
- +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/10/MLA_2015_00334_10-VARIATION-10-FORM.pdf|Variation Form]] +
- +
-==== Variation 11 ==== +
- +
- +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/11/MLA_2015_00334_11-VARIATION-11-FORM.pdf|Variation Form]] +
- +
-==== Variation 12 ==== +
- +
- +
-[[this>Teesworks/Planning/MLA_2015_00334/12/MLA_2015_00334_12-VARIATION-12-FORM.pdf|Variation Form]] +
- +
-===== Sediment Sampling ===== +
- +
-2005 sampling - only supplied as poorly scanned pdf - [[this>Teesworks/Planning/MLA_2015_00334/Additional Documents/Appendix 20.4 - CEFAS results data sheets etc.pdf|pdf]]. +
- +
-2016 sampling - surface channel - only trace metal data - [[this>Teesworks/Planning/MLA_2015_00334/Additional Documents/Sample Results 20.04.2016.xlsm|MMO Template Spreadsheet - Sample Results 20.04.2016.xlsm]] - sediment data explorer. +
-{{url>https://steps39.github.io/SedDataExp/SedimentDataExplorer.html?urls=https://www.northeastfc.uk/Teesworks/Planning/MLA_2015_00334/Additional%20Documents/Sample%20Results%2020.04.2016.xlsm&noninter=noninter}} +
- +
-2017 sample - surface berth 8 and 9 - only trace metal, PAH, tin data - [[this>Teesworks/Planning/MLA_2015_00334/3/Additional Documents/20171110 SAM201700066A Able Seaton Port Berth 8  9 MMO Results Template(4).xlsm|MMO Template Spreadsheet - 20171110 SAM201700066A Able Seaton Port Berth 8  9 MMO Results Template(4).xlsm]] - sediment data explorer. +
-{{url>https://steps39.github.io/SedDataExp/SedimentDataExplorer.html?urls=https://www.northeastfc.uk/Teesworks/Planning/MLA_2015_00334/3/Additional%20Documents/20171110%20SAM201700066A%20Able%20Seaton%20Port%20Berth%208%20%209%20MMO%20Results%20Template(4).xlsm&noninter=noninter}} +
- +
-2020 sample - surface port and channel - more complete sample set - [[https://www.northeastfc.uk/Teesworks/Planning/MLA_2015_00334/8/Additional Documents/MMO_Results_Template  +
- - MAR00562.xlsm|MMO Template Spreadsheet - MAR00562.xlsm]] - sediment data explorer. +
-{{url>https://steps39.github.io/SedDataExp/SedimentDataExplorer.html?urls=https://www.northeastfc.uk/Teesworks/Planning/MLA_2015_00334/Returns/MMO_Results_Template%20%20-%20MAR00562.xlsm&noninter=noninter}} +
- +
-2022 sample - surface port and channel - [[https://www.northeastfc.uk/Teesworks/Planning/MLA_2015_00334/Returns/CorrectedMAR01671 MMO_Results_Template Rev 1.xlsm|MMO Template Spreadsheet - CorrectedMAR01671 MMO_Results_Template Rev 1.xlsm]] - sediment data explorer. +
-{{url>https://steps39.github.io/SedDataExp/SedimentDataExplorer.html?urls=https://www.northeastfc.uk/Teesworks/Planning/MLA_2015_00334/Returns/CorrectedMAR01671%20MMO_Results_Template%20Rev%201.xlsm&noninter=noninter}} +
- +
-===== May 2024 ===== +
- +
-Drone video of the Causeway dredger in Seaton Channel: +
-{{youtube>4iTnjh5rvys}} +
-Drone video of the dredgers Causeway and Magnor in Seaton Channel: +
-{{youtube>nBBuZalbbmc}} +
-Film of dredger Magnor operating on the south side of the Seaton Channel, filmed from the mudflats of North Gare. +
-{{youtube>AjcaNnUkbZw}} +
  
 +[[Able UK - Port of Middlesbrough Dredging]]
  
  
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