Thorne Moors Internal Drainage Board Partnership Thorne, Crowle
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Thorne Moors Internal Drainage Board Partnership Thorne, Crowle and Goole Moors Site of Special Scientific Interest Water Level Management Plan March 2010 Final Report JBA Consulting Thorne Moors IDB Partnership Denison House Tween Bridge Internal Drainage Board Hexthorpe Road Denison House DONCASTER Hexthorpe Road DN4 0BF DONCASTER UK DN4 0BF t: +44 (0)1302 342 055 f: +44 (0)1302 329 887 www.jbaconsulting.co.uk AUTH O RISED SIG N ATURES The under m entioned, being representatives of the appropriate organisations and duly authorised, have ratified this Water Level Managem ent Plan as prepared by JBA Consulting for the Tween Bridge Internal Drainage Board. The signatories confirm by their signature below that they agree with the findings and recom m endations of this Water Level Managem ent Plan. The actions set out in this Plan would achieve the water level m anagem ent appropriate for securing the target condition of the SSSI The Tween Bridge Internal Drainage Board is com m itted to enacting this plan im m ediately following ratification by the signatories below and receipt of grant aid from Defra. TW EEN BRID G E IN TERN AL DRAIN AG E BO ARD … … … … … … … … … … … … … … … … … … … … … … … … Position: Chairm an Nam e: Mr J Burtwistle Date:..2 March 2010.............................................. N ATURAL EN G LAN D … … … … … … … … … … … … … … … … … … … … … … … … Position: Conservation O fficer Nam e: Mr T Kohler Date:.28 February 2010........................................ Thorne M oors Internal Drainage Board Partnership Thorne, Crow le and G oole M oors Site of Special Scientific Interest W ater Level M anagem ent Plan 2008 REVISIO N H ISTO RY Revision Ref./ Am endm ents Issued to Date Issued Water Level Management Plan Tim Kohler Natural England Consultation Draft Helen Kirk – THM Conservation September 2008 Forum (electronic copy) Water Level Management Plan Tim Kohler Natural England Consultation Draft April 2009 CO N TRACT This docum ent has been produced by JBA Consulting for the Tween Bridge IDB which is representing the Thorne Moors Internal Drainage Board Partnership. It has been prepared solely as a Water Level Managem ent Plan for Thorne, Crowle and G oole SSSI. It should be noted that no site investigation can guarantee com plete assessm ent or predication of the natural environm ent. David Patrick and Steve Judge of JBA Consulting carried out the work. Prepared by: ................................................ .............................. David Patrick HND, MELA, MFBA Principal Environm ental Scientist Reviewed by: ............................................................................... Kieran Sheehan BSc MSc PG CE MIEEM MIfL Senior Environm ental Scientist Approved by: ................................................................................ Ian Benn HNC, HND, MIQ A Technical Director Date: Septem ber 2009 © Jerem y Benn Associates Ltd D ISCLAIM ER This docum ent has been prepared by JBA Consulting for the Internal Drainage Boards form ing the Thorne Moors Internal Drainage Board Partnership solely as a Water Level Managem ent Plan for Thorne, Crowle and G oole Moors SSSI. JBA Consulting accepts no responsibility or liability for any use that is m ade of this docum ent other than by the Client for the purposes for which it was originally com m issioned and prepared. JBA Consulting www.jbaconsulting.co.uk N:\2004\Projects\2004s8426 - Tween Bridge Internal Drainage Board - Thorne Moors WLMP\Reports\Thorne Moors SSSI WLMP Final March 2010.doc: i Thorne M oors Internal Drainage Board Partnership Thorne, Crow le and G oole M oors Site of Special Scientific Interest W ater Level M anagem ent Plan 2008 CO N TEN TS Page REVISIO N HISTO RY i C O N TRAC T i D ISC LAIM ER i C O N TEN TS ii 1 IN TRO DUCTIO N ----------------------------------------------------------------------------------------------------- 1 1.1 Sum m ary ........................................................................................................................................ 1 1.2 Thorne Moors IDB Partnership ...................................................................................................... 1 2 PURPO SE O F TH E PLAN ----------------------------------------------------------------------------------------- 3 2.1 Purpose of the Plan ........................................................................................................................ 3 2.2 Policy .............................................................................................................................................. 3 2.3 Water Level Managem ent Plan Review .......................................................................................... 3 2.4 O bjectives....................................................................................................................................... 4 3 SITE D ETAILS -------------------------------------------------------------------------------------------------------- 6 3.1 Site Details ..................................................................................................................................... 6 4 N ATURE CO N SERVATIO N --------------------------------------------------------------------------------------- 8 4.1 Nature Conservation Interest ......................................................................................................... 8 4.2 Conservation Aim s ......................................................................................................................... 8 4.3 Conservation Managem ent .......................................................................................................... 10 5 O TH ER LAN D USES ---------------------------------------------------------------------------------------------- 11 5.1 Within the SSSI ............................................................................................................................ 11 5.2 Land Adjacent to the SSSI ........................................................................................................... 11 6 PH YSICAL FEATURES ------------------------------------------------------------------------------------------- 12 6.1 Background .................................................................................................................................. 12 6.2 Topography .................................................................................................................................. 12 6.3 G eology ........................................................................................................................................ 12 6.4 Soils .............................................................................................................................................. 12 6.5 Clim ate ......................................................................................................................................... 13 6.6 Hydrology of Thorne Moors ......................................................................................................... 13 6.7 Internal Drainage Boards Surrounding Thorne Moors ................................................................ 15 6.8 Uncertainties ................................................................................................................................ 17 6.9 Current Site Condition .................................................................................................................. 17 7 W ATER Q UALITY -------------------------------------------------------------------------------------------------- 20 7.1 Introduction .................................................................................................................................. 20 7.2 Water Q uality ................................................................................................................................ 20 8 W ATER LEVEL M AN AG EM EN T O BJECTIVES ----------------------------------------------------------- 21 8.1 Water Level Managem ent O bjectives .......................................................................................... 21 9 SITE CO N STRAIN TS AN D IM PACT O N ADJACEN T G RO UN D ------------------------------------- 23 9.1 Introduction .................................................................................................................................. 23 9.2 Practical and financial constraints ............................................................................................... 23 9.3 Environm ental constraints and opportunities .............................................................................. 24 10 ALTERATIO N S TO IN FRASTRUCTURE AN D PRO CED URES --------------------------------------- 25 10.1 Introduction .................................................................................................................................. 25 11 PRO PO SED ACTIO N --------------------------------------------------------------------------------------------- 26 JBA Consulting www.jbaconsulting.co.uk N:\2004\Projects\2004s8426 - Tween Bridge Internal Drainage Board - Thorne Moors WLMP\Reports\Thorne Moors SSSI WLMP Final March 2010.doc: ii Thorne M oors Internal Drainage Board Partnership Thorne, Crow le and G oole M oors Site of Special Scientific Interest W ater Level M anagem ent Plan 2008 CO N TEN TS Page 11.1 Proposed Data collection and Research ..................................................................................... 26