The Irfon Special Area of Conservation (ISAC) Project The ISAC project was an EU Life+ funded initiative to restore water quality and habitat to this major upper Wye tributary, as well as protect its Annex II species. Although the project finished in 2013, it has received more publicity recently with the news that the captive breeding programme for white clawed crayfish started within ISAC has been successful. Read more about the ISAC project here. Read more about the results of ISAC's white clawed crayfish captive breeding programme.