Las Vegas-based Pinnacle Entertainment Inc. expects to open its L’Auberge Baton Rouge casino by Labor Day, according to Carlos Ruisanchez, executive vice president and chief financial officer of Pinnacle Entertainment.

The company spent $27.3 million during the fourth quarter on the casino — $96.9 million in 2011 — that lies off River Road. So far the company has spent $155.5 million of the $368 million budgeted for the casino.