 In 2014, a cannonball believed to be of Civil War origins was found in the creek.The Lincoln Memorial Shrine Museum in Redlands confirmed that it had been used by the Union army, but there are no records of Union troops ever passing through the area.A likely scenario is that the cannonball was lost by a contingent traveling to Riverside, and washed down the Santa Ana River (which during the 1860s still flowed into Newport Bay) by floods.