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Miles below Minne

apolis

424. 2

424. 2 425. 0 425.0

Chart No. 28

BLACKHAWK CHUTE (upper end) (closing dam at upper end).
BLACKHAWK ISLAND (ISLAND NO. 355) (head).
GAGE, KEITHSBURG (see p. 289).

MINNEAPOLIS & ST. LOUIS RAILROAD BRIDGE (see p. 240).
Clearances: Horizontal 224.0 feet; available 224.0 feet. Vertical 19.2
feet (lowered), 65.7 feet (raised) above pool 9.3 feet (lowered), 55.8
feet (raised) above 1929 high water.
POPE CREEK

WAYNE BROTHERS GRAIN CO. ELEVATOR (see p. 17).
KEITHSBURG, MERCER CO., ILL. (1,130) Railroads: Chicago,
Burlington & Quincy; Minneapolis & St. Louis..

KEITHSBURG CHUTE (upper end) (closing dam near upper end)..
KEITHSBURG ISLAND (MAPES ISLAND) (ISLAND NO. 357)
(head)..

BLACKHAWK ISLAND (ISLAND NO. 355) (foot).

425. 1

425.4

425.5

425.8

425.8

426. 6

426.7

427.0

(foot).

427.0

427.5

427.7

427.7

428.7 429.0

429.7

BLACKHAWK CHUTE (lower end).

KEITHSBURG ISLAND (MAPES ISLAND) (ISLAND NO. 357)

KEITHSBURG CHUTE (lower end).

WILLOW BAR ISLAND (foot).

HURON SLOUGH (upper end) (closing dam near upper end)

HURON ISLAND (ISLAND NO. 358) (head) (partly inundated).
SPRING SLOUGH (upper end).

ISLAND NO. 359 (foot).

CAMPBELL SLOUGH (upper end).

CAMPBELL ISLAND (head) (partly inundated).

SPRING SLOUGH (lower end) (empties into Campbell Slough) (behind
Campbell Island.).

431.0 HAWKEYE-DOLBEE DIVERSION CHANNEL (empties into
Huron Slough behind Huron Island).

431.0

431.2

431. 2

ISLAND NO. 362 (head) (partly inundated).

BIG CODY ISLAND (foot) (partly inundated)

LITTLE CODY ISLAND (ÏSLAND NO. 361) (foot) (partly inun-
dated)

JOHNSON ISLAND (ISLAND NO. 363) (head) (partly inundated).
HURON ISLAND (ISLAND NO. 358) (foot) (partly inundated).
ISLAND NO. 362 (foot) (partly inundated).

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429, 7

423.3

429.7

430.0

BIG CODY ISLAND (head) (partly inundated) (behind island No. 360) -
ISLAND NO. 360 (foot) (partly inundated)..

423.3

423.0

430.2

422.8

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431.4

431.7

432. 2

433.0

433.0

433.2

433.2

433.4

433. 4

433.5

433.5

434.0

434.0

435. 1

435. 1

JOHNSON ISLAND (ISLAND NO. 363) (foot) (partly inundated).
CAMPBELL SLOUGH (lower end) (empties into Benton Bay behind
Campbell Island).

BENTON SLOUGH (upper end) (closing dam near upper end).
BENTON ISLAND (ISLAND NO. 364) (head) (partly inundated).
CAMP ISLAND (foot) (partly inundated)

BENTON BAY (lower end) (empties into Benton Slough) (behind
Benton Island).

LITTLE NIGGER ISLAND (foot) (partly inundated).
CAMPBELL ISLAND (foot) (partly inundated).

NIGGER ISLAND (foot) (partly inundated).

HURON SLOUGH (lower end).

BENTON ISLAND (ISLAND NO. 364) (foot) (partly inundated)
BENTON SLOUGH (lower end).

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411.3 411.8

ISLAND NO. 349 (foot) (partly inundated).

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MICHAEL CREEK.

PORT LOUISA, LOUISA CO., IOWA.

BOGUS ISLAND (ISLAND NO. 348) (foot) (partly inundated).
ILLINOIS SLOUGH (lower end).

ISLAND NO. 350 (foot) (partly inundated).

TURKEY ISLAND (ISLAND NO. 351) (head) (partly inundated).
TURKEY ISLAND (ISLAND NO. 351) (foot) (partly inundated).
GAGE, LOCK AND DAM NO. 17 (upper) (see p. 289).

GAGE, LOCK AND DAM NO. 17 (lower) (see p. 289).
OTTER ISLAND (foot) (partly inundated).

KEG ISLAND (ISLAND NO. 352) (head)
ISLAND NO. 353 (head)

KEG ISLAND (ISLAND NO. 352) (foot).
ISLAND NO. 353 (foot).

BRASS ISLAND (ISLAND NO. 354) (foot).
IOWA RIVER (mouth).

BOSTON BAY (mouth).

420.0 OGLE GRAIN CO. ELEVATOR (see p. 17).

420.1

421.7

NEW BOSTON, MERCER CO., ILL. (801). Ferry to Iowa side.
Railroad: Chicago, Burlington & Quincy..

EDWARDS RIVER (mouth)..

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LOCK AND DAM NO. 17 (see p. 194) (for regulations see p. 21). Lock
on left bank, 110′ x 600′.

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392. 4

392.9

393.1

393.1

395.0

395.0

395.0

395. 1

395. 2 395.7

395.8

395.9

396. 2

396.3

396.8

397.2 397.5

397.6

ISLAND NO. 330 (foot) (now inundated).

HERSHEY ISLAND (ISLAND NO. 333) (head) (partly inundated)..
SWEETLAND CREEK.

ISLAND NO. 331 (foot) (partly inundated) (behind Hershey Island)
HERSHEY ISLAND (ISLAND NO. 333) (foot) (partly inundated).
DRURY SLOUGH (lower end).

HOG ISLAND (head) (partly inundated).

HERSHEY SLOUGH (lower end) (present main channel).
GENEVA ISLAND (foot) (partly inundated)

GAGE, LOCK AND DAM NO. 16 (upper) (see p. 289).

LOCK AND DAM NO. 16 (see p. 195) (for regulations see p. 21). Lock
on left bank, 110' x 600'.

GAGE, LOCK AND DAM NO. 16 (lower) (see p. 289).
HOG ISLAND (foot) (partly inundated).
WYOMING SLOUGH (lower end)..

ISLAND NO. 334 (foot).

MAD CREEK.

MUSCATINE HIGHWAY BRIDGE (see p. 241)

Clearances: Horizontal 427.6 feet; available 427.6 feet. Vertical (mid 300 feet) 66.6 feet above pool; 52.6 feet above 1922 high water. MUSCATINE, COUNTY SEAT OF MUSCATINE CO., IOWA (18,286). Principal industry is the manufacture of pearl buttons. Railroads: Chicago, Milwaukee, St. Paul & Pacific; and Chicago, Rock Island & Pacific.

MCKEE FEED & GRAIN CO. ELEVATOR (see p. 17).

GAGE, MUSCATINE (see p. 289).

MISSISSIPPI VALLEY GRAIN & FEED CO. ELEVATORS (see

ISLAND NO. 335 (head).

ISLAND NO. 335 (foot).

SUBMARINE PIPE CROSSING.

BLANCHARD ISLAND (ISLAND NO. 337) (head) (behind Bass
Island)

397.8

397.8

397.8

p. 17)

398.4

399.7

400.4

ISLAND NO. 336 (head).

400.5

400.8

ISLAND NO. 336 (foot).

400.9

401.6 402.1

402.9

403.6

404.6

404.9

405.0

405. 5 406.7

406.9 408.3

408. 6 408.6 408.7

STANDARD INVESTMENT CO. TERMINAL (see p. 17),

COPPERAS CREEK DIVERSION CHANNEL (enters slough be-
hind Blanchard Island).

WILLOW ISLAND (ISLAND NO. 338) (head).

WILLOW ISLAND (ISLAND NO. 338) (foot).

GAGE, BASS ISLAND (see p. 289)

BLANCHARD ISLAND (ISLAND NO. 337) (foot) (behind Bass
Island)

BASS ISLAND (ISLAND NO. 339) (foot) (partly inundated).
ISLAND NO. 343 (head) (partly inundated).

BARKIS ISLAND (ISLAND NO. 346) (head) (partly inundated).
ISLAND NO. 343 (foot) (partly inundated)

BARKIS ISLAND (ISLAND NO. 346) (foot) (partly inundated).
ILLINOIS SLOUGH (upper end) (closing dam near upper end).
BOGUS ISLAND (ISLAND NO. 348) (head) (partly inundated).
ISLAND NO. 347 (foot) (partly inundated) (behind Bogus Island).
409.7 ISLAND NO. 349 (head) (partly inundated)..

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