Just a day after the Union victory at Gettysburg, a large celebration was held. Nearly 5,000 people gathered at the Arsenal parade grounds for a day of festivities. The Declaration of Independence was read by Cpt. Levan C. Rhines of the 1st Michigan Sharpshooters and Col. Charles V. DeLand, also of the Sharpshooters, made a short speech. Records show that the day of the celebration was so hot, thirty barrels of ice water was consumed within fifteen minutes.
Source : Arsenal at War