526.0 527.4 528.0 COTTONWOOD ISLAND (foot) (partly inundated) 524.4 525. 1 525.1 525.8 QUINCY BAY (mouth) Quincy Bay provides a winter harbor for Govern- 526.0 QUINCY, COUNTY SEAT OF ADAMS CO., ILL. (39,221). Principal QUINCY MEMORIAL HIGHWAY BRIDGE (see p. 222). Clearances: Horizontal 617.0 feet; available 617.0 feet. Vertical 63.7 feet CURTIS CREEK. GAUGE, LOCK AND DAM NO. 21 (upper) (see p. 276). 528.1 LOCK AND DAM NO. 21 (see p. 180) (for regulations see p. 16). Lock on 324.9 528.2 GAUGE, LOCK AND DAM NO. 21 (lower) (see p. 276) L 324.8 529.3 WARD ISLAND (head). L 323.7 530.0 MARK STATION, MÁRION CO., MO. Railroad: Chicago, Burlington & MARION CITY, MARION CO., MO. Destroyed by flood of 1851. Brass 319. 2 318.6 318.5 318.3 316.4 316.0 239740-40-7 |