A ditch is being excavated 11-feet deep, 3-feet wide, 1250-feet long sloped at a 1:1 ratio, how many cubic yards is needed if there is a 35% compaction rate?

A ditch is being excavated 11-feet deep, 3-feet wide, 1250-feet long sloped at a 1:1 ratio, how many cubic yards is needed if there is a 35% compaction rate?