This R code is intended to evaluate the sinking rate of Bayluscide® 3.2% Granular Sea Lamprey Larvicide (GB) and determine its implications. GBsinkingrate.R determines the average sinking rate of GB, prediction intervals on GB sinking rate, average time to Bayluscide release from GB, prediction intervals on Bayluscide release time, maximum application depth with GB based on GB sinking rate and Bayluscide release time prediction intervals, and necessary buffer regions/plot adjustment for lotic environment treatments with GB Downstreamvelocity.R displays a plot that shows the downstream velocity of GB over time.