 Some other materials consist of 450,000 cubic yards of backfill is required along with 35,000 cubic yards of concrete lining material, 500,000 linear feet of aqualastic sealant and 85,000 cubic yards of riprap.To minimize any possible negative affects to biological resources, construction will occur when canal flows are low enough to avoid in-water work.Construction will also have an effect on air quality but only in the short term.