LETTER OF TRANSMITTAL.

ENGINEER OFFICE UNITED STATES ARMY,
Newport, R. I., March 7, 1878.

GENERAL: I have the honor to present herewith my final report upon the investigation of the question of bridging the Mississippi in such manner as to preserve the navigation, assigned to me under section 4 of the act for the improvement of rivers and harbors, &c., approved June 23, 1866.

Very respectfully,

G. K. WARREN,

Major of Engineers and Bvt. Maj. Gen., U. S. A.

Brig. Gen. A. A. HUMPHREYS,
Chief of Engineers, U. S. A.

REPORT

ON

BRIDGING THE MISSISSIPPI RIVER

BETWEEN

SAINT PAUL, MINN., AND SAINT LOUIS, MO.,

BY

GOUVERNEUR K. WARREN,

MAJOR OF ENGINEERS AND BREVET MAJOR-GENERAL, U. S. ARMY.

1878.

ERRATA.

Page 7, line 11 from top, for "of Mississippi" read of the Mississippi.
Page 8, line 12 from top, for "highway bridges" read highway bridge.
Page 15, line 12 from top, for cannot give, such as now constructed
such as now constructed cannot give.

Page 15, line 8 from bottom, for

"submergeable" read submergence.

read

Page 16, line 23 from top, after "land surveys," add (one on each side of the Mississippi.)

Page 16, line 13 from bottom, after "200 feet to an inch," add (reduced in publication.)

to might be.

Page 17, line 5 from top, after 'profiles," add and sections.
Page 17, line 20 from bottom, change might do,"
Page 19, line 18 from top, strike out the comma after

after "which."

"materials," and insert one

66

"This river'
Minnesota "
and below"

to

This view.

in the bed.
"The extremes " read The streams.

Page 20, line 7 from bottom, change
Page 21, line 1 from bottom, change
Page 22, line 14 from bottom, change
Page 23, line 28 from top, change "on the bed" to
Page 24, line 26 from top, for
Page 24, line 10 from botton, for "Where" read When.
Page 25, line 8 from top, for should have" read might have.
Page 27, line 9 from bottom, for "4 feet" read 40 feet.
Page 28, line 14 from top, No. 12 should begin a paragraph.
Page 28, line 2 from bottom, for "Suy Carte" read Sny Carte.
Page 29, line 7 from top, for "Upper and Lower" read Lower and Upper.
Page 30, line 10 from top, for drift loess" read drift and loess.
Page 30, line 15 from top, for

the river " read the rise.

Page 31, table, for "Zambro" read Zumbro for

"Big Monomonee" read

Big Menomonee for "Wapsipinican" read Wapsipinicon. Page 32, table, for 'Perague" read Perogue for Big Pisa" read Big

Piasa for "Lisle de Bois" read L'ile de Bois.

Page 34, line 19 from top, for "unable" read able.

Page 36, table, for "I. H. Johnston" read J. H. Johnston.

Page 38, line 12 from bottom, for

"low draws" read low draw.

Page 41, line 18 from bottom, for "as such" read as a zone diagram.

Page 41, line 16 from bottom, strike out
Page 41, line from bottom, insert
9

Page 47, 2d table, headings of columns should be o and 5 feet. o and 10 feet. o and 15 feet. &c., instead of o and 5 feet. 5 and 10 feet. feet. &c.

10 and 15

for "9.8" read 9.7

Page 51, under June, last column, for "2.7" read 2.8
for "0.3" read 0.8 for "0.8" read 0.3.
Page 54, line 17 from bottom, for "receive" read secure.
Page 57, May, last column, for "2.1" read 2.2.
Page 61, 1875, last column. for "29" read 21, for '31'
Page 64, line 25 from top, for "that river's" read that the river's.
Page 66, table, 5th column for "8.5" read 78.5.

read 39.