Scheme  Data  Sheet    Scheme  Name:   A483  Machynys  West,  Llanelli    Form  of  Contract:   ECC  Option  B    Value:   £2.3  Million    Programme:   2008  to  2010  (12  Months)      __________________________________________________________________________________  

      jbhl.co.uk    

Page  1    

 

Principal  Contractor:   Jones  Brothers  (Henllan)  Ltd    Design  Responsibility:   Client    Client:   Welsh  Government  /  Carmarthenshire  CC    Description  /  Key  Delivery  Features:   JBHL   were   engaged   by   the  

Welsh  Government  and  CCC  for  the   construction   of   a   new  roundabout   and   adjoining  access   roads   on   the   A483  coastal   link   road,   Llanelli.   The  contract   also   included   utility  service   diversions,   major  surface  water   drainage,   sewage   rising  main   diversion   and   pumping  station  construction.  

 Relevance:   The   contract   highlights   our   capability   to   effectively   apply   a   robust  

traffic  and  pedestrian  management  plan  to  facilitate  the  undertaking  of   construction   related   activities   alongside   a   fully   operational  highway  and  coastal  footpath.    

 Other  significant  elements  of  the  contract  included:  •     Installation   of   surface   water   drainage   involving   deep  

excavations  (up  to  4.5m)  and  tidal  working.    •     Sewage  pumping  main  diversions  (150mm  dia).  However,  

a   section   across   several   high   voltage   cables   was  directionally  drilled.    

•     Construction   of   a   7m   deep   foul   sewage   pumping   station  including  M&E  and  Pump  Installations.    

•     Continuous   dewatering   owing   to   ground   conditions   and  location  adjacent  to  the  sea.    

 Challenges  Met  /  Solutions  Provided:   Risk  was  minimised  during  the  project  by:  

• Early  site  investigation  to  define  works  in  detail.  • Detailed  planning  and  programming  of  project.  • Undertaking  a  full  site  investigation  of  statutory  undertaker  

infrastructure.  • Coordination  of  our  programme  to  include  all  support  

activities  and  associated  diversionary  works.    The  following  challenges  were  encountered  during  the  project:  • Maintaining  traffic  flows  and  minimising  disruption  to  road  

Scheme  Data  Sheet    Scheme  Name:   A483  Machynys  West,  Llanelli    Form  of  Contract:   ECC  Option  B    Value:   £2.3  Million    Programme:   2008  to  2010  (12  Months)      __________________________________________________________________________________  

      jbhl.co.uk    

Page  2    

users  and  inconvenience  to  pedestrian  and  cycle  traffic.  • Working  safely  in  deep  excavations  and  in  tidal  conditions.  • Surface  drainage  obstructions  caused  by  132KV  cable.  • Contaminated  land  issues  as  a  former  steel  works  was  

located  on  part  of  the  site.    • The  site  was  located  near  a  gypsy  encampment  and  needed  

24/7  security.          

Surplus  earthworks  were  recycled  and  used  as  fill  over  landscaped  areas.  This  sustainable  approach  was  in  compliance  with  our  Site  Waste  Management  Plan  and  was  fully  endorsed  by  the  EA.        

 Extensive  use  was  made  of  temporary  traffic  barriers  to  protect  the  workforce  and  pedestrians.  Outputs  were  also  improved  within  well  defined  and  properly  protected  safe  working  areas.      The  efficiencies  and  improvements  implemented  included:  • Effective  planning  and  systematic  programming  of  the  work  

including  collaborative  meetings  with  stakeholders.    • The  importance  of  allocating  adequate  and  appropriate  

resources  in  order  to  effectively  mobilise  the  contract.  • Early  appreciation  of  the  HS&E  implications  of  the  site  area  

and  the  impact  on  work  activities.  • The  importance  of  creating  a  culture  of  working  together  in  

order  to  achieve  the  project  objectives.          Principal  Supply  Chain  Partners:   JBHL   delivered   substantive   elements   of   the   contract   using   our  

directly   employed   workforce   which   helped   ensure   there   was   no  duplication   of   supervision   or   ‘fee   on   fee’.   However,   the   following  specialist  subcontractors  were  employed:  

 • Directional  drilling  • Traffic  management  • Street  lighting  • Surfacing  works.  • Mechanical  and  electrical  installation  works.  

   All  subcontractors  are  included  on  JBHL  Approved  Supply  Chain  List.    

 References:   Mr  John  Payne,  Director  of  Waterman  Consulting  Engineers:    ‘We  were  pleased  with  the  way  you  managed  the  construction  phase  of   this  project  and  applied  your  knowledge  and  experience  to  many  of  the  unforeseen  and  challenging  activities  encountered.  Well  done  to  everyone  involved.’