Environmental Water Supply February 5, 2019 – Londonderry Project Photos. Compost Shed Compost Shed Compost Shed Compost Shed Compost Shed Compost Shed Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank Ferro Cement Tank St. Vincent