The　logarithmic　spiral　curved　arch　dam　(LSCAD)　is　a　new　type　of　dam.　Based　on　mathematic　equations　developed　for　the　arch　rings　of　the　LSCAD　and　automatic　mesh　generation　techniques,　a　mesh　generation　system　for　the　LSCAD　was　constructed.　Differnt　design　patterns,　including　strategy　pattern,　fac¸ade　pattern,　CAD-mesh　separation　pattern　and　embedded　element　pattern,　were　employed　in　this　system.　It　is　demonstrated　that,　by　using　these　patterns,　the　reliability,　reusability,　maintainability　and　scalability　of　the　system　can　be　greatly　improved.　At　last,　specific　examples　of　mesh　generation　using　the　developed　system　are　presented　graphically.　©　2011　IEEE.