Gas emissions and odour control is an increasing concern as swine commercialization expands, since odour continues to be a limiting factor for future growth. Present odour control technologies for lagoon slurry storage largely focus on dilution of emissions into the atmosphere. Air-supported pneumatic structures have the potential to be an efficient and economical alternative to conventional odour control technologies. A pneumatic structure developed in this project virtually eliminated gases from entering into the atmosphere and the total cost was $1/m2 (9.4c/ft2) per year based on an expected 10 year service life. The total operating cost was $12 per month. Technical aspects, such as critical internal pressures, proper perimeter attachment, and desirable operating conditions were determined. The study also included measuring and analysing the biological activity and biogas production within the cover, along with gas emission data.