527.4 528.0

528.1

528. 2

529. 3

530.0

524.4

525.1

525. 1 525.8

526.0

COTTONWOOD ISLAND (foot) (partly inundated).

CHICAGO, BURLINGTON & QUINCY RAILROAD BRIDGE (see p. 223).
Clearances: Horizontal 153.0 feet; available 153.0 feet. Vertical (to aerial
wires) 69.9 feet above pool; 57.6 feet above computed high water.
GAUGE, QUINCY (see p. 276)-

QUINCY BAY (mouth) Quincy Bay provides a winter harbor for Govern-
ment and private craft.
QUINCY, COUNTY SEAT OF ADAMS CO., ILL. (39,221). Principal
industries are foundry products, fiber products, general merchandising, and
banking. Railroads: Chicago, Burlington & Quincy; Quincy, Omaha &
Kansas City; Wabash_.

526.0 QUINCY MEMORIAL HIGHWAY BRIDGE (see p. 222).

Clearances: Horizontal 617.0 feet; available 617.0 feet. Vertical 63.7 feet
above pool, 51.5 feet above computed high water.

CURTIS CREEK.

GAUGE, LOCK AND DAM NO. 21 (upper) (see p. 276).

LOCK AND DAM NO. 21 (see p. 180) (for regulations see p. 16). Lock on
left bank, 110' x 600'.

GAUGE, LOCK AND DAM NO. 21 (lower) (see p. 276).

WARD ISLAND (head).

MARK STATION, MÁRION CO., MO. Railroad: Chicago, Burlington &
Quincy.

530.0

FABIUS RIVER (mouth).

530. 2

ORTON ISLAND (foot)

322.8

530.2

FABIUS ISLAND (head).

322.8

531.3

WARD ISLAND (foot).

321.7

MARION CITY, MARION CO., MO. Destroyed by flood of 1851. Brass
tablet marks old site.

318.5

516.4

LA GRANGE ISLAND (head).

517.0

LA GRANGE, LEWIS CO., MO. (1,114). Railroad: Chicago, Burlington

341.9

341.9

340.8

340.3

340.3

339.5

338.8

338.5

338.4

337.5

337.2

337.2

337. 1

336.8

336.6

336.0

336.0

335.0

334.7

334.3

334.3

332.4

332. 4

332. 1

331.6

331.6

331.5

331.3

330.7