The St. Lawrence Seaway concluded its 50th anniversary season on December 28 with the passage of the JW Shelley. The vessel transited the Iroquois Lock at 7:37 p.m. on route to Lake Ontario. The Seaway navigation season for 2009 spanned 274 days. The Welland Canal, which has been in operation since 1932, remained open to navigation until December 30, as the CSL Tadoussac transited Lock 1 at 3:04 p.m. and cleared Port Weller entering Lake Ontario at 3:22 p.m. Total Seaway cargo volume for 2009 is estimated to amount to 30.5 million tonnes, the lowest volume witnessed since the early 1960's. The 25% decrease in cargo volume compared to 2008 can be attributed to the depth of the recession, which sharply curtailed movements of iron ore and steel on the waterway.