(Francisco Kjolseth | The Salt Lake Tribune) The Division of Wildlife Resources introduce around 40,000 splake, a sterile cross between lake trout and brook trout, into the Jordanelle Reservoir on Thursday, June 21, 2018. Measuring four to five inches long, splake will quickly grow and could reach adult lengths of more than two feet long as part of ongoing management plans at the reservoir that currently holds numerous other fish species.