This Saturday, March 28 River North Dance Chicago (RNDC) will be presenting two world premiere performances as part of the closing performance of the company’s 25th anniversary season. On the bill is Adam Barruch’s “the frost that binds,” and if Barruch’s name sounds familiar, don’t be alarmed. RNDC has employed Barruch on two previous occasions: once for a world premiere called “I Close My Eyes Until the…