and delivered on Government barges about 23 miles above Memphis, Tenn. The stone was also furnished by contract from quarries at Williford, Ark., about 118 miles from West Memphis, on the line of the Kansas City, Fort Scott and Memphis Railroad, and delivered, one half along the bank over a railroad track paralleling it and built by the contractor, and the other half on Government barges at West Memphis, Ark.

Grading. As the caving had not displaced all the old revetment, this had to be removed preparatory to grading. The bank also was covered with heavy timber, which was felled and cleared back for a distance of about 100 feet. Hydraulic grading was begun on September 15, 1891, and finished on November 19, and as the stage of the river was very favorable, being near low water during the entire time, a very satisfactory grade was obtained, in no case being greater than 33 per cent, the average being about 30 per cent.

The total length of graded bank was 3,475 feet; quantity of material removed, 82,584. This cost $0.045 per cubic yard for pump work, but, adding to this the cost of clearing and trimming the bank, the cost reaches $0.067 per cubic yard.

Three grading machines were used; on one the pumps were duplex condensing, with 20-inch steam cylinders, 10-inch plungers, and 12-inch stroke. These delivered two streams, removed an average of 67.4 cubic yards per hour, at a cost of 0.043 per cubic yard. They were worked at high pressure as the condenser was out of order, otherwise the cost would have been less. The other machines had compound, noncondensing duplex pumps, with 163 and 10 inch steam cylinders, 64-inch plungers, and 10-inch stroke: they delivered but one stream and graded each 48.5 cubic yards per hour, at a cost of $0.047 per cubic yard:

All the pumps worked under a pump pressure of 160 pounds per inch and used 3inch hose and 3-inch nozzles.

Subaqueous or river mattresses.-These were of the usual type of woven mattresses, strongly built and cabled. They were sunk after the bank was graded, the shore edge being in all cases at or below the extreme low-water line.. The length of bank covered was 2,588 feet.

Four mattresses were sunk of the following dimensions: No. 1, 613 by 120 feet; No. 2, 715 by 200 feet; No. 3, 440 by 220 feet, and 320 feet by 200 feet; No. 4, 550 by 220 feet. The cost per square foot in place was $0.0351.

Connecting mattresses.-These well overlapped the river maîtresses and extended up the graded slope until a good foundation was reached whereon to begin the paving. They therefore have their shore edges at different levels, some near low water and others at mid-stage, and vary in width from 30 to 80 feet.

They were all built on ways and similar to the river mattresses, but after being launched received one or more layers of small brush, and where steep places occurred in the slopes below the water line they were cribbed to bring their tops to a uniform grade when sunk. They vary in thickness from 14 to 4 feet. They were sunk along the entire graded bank, along 1,735 feet of the old work of 1887-88 and 420 feet of the work of 1885, the total length of bank they covered being 5,725 feet; average width, 66.3 feet; area, 379,965 square feet, and cost $0.0559 per square foot. The quantity of brush and poles used in the river mats was 0.77 cords per square of 100 feet, and in the connecting mats 1.40 cords per square: the stone used in ballasting was for the river mats 0.71 tons per square, and for the connecting mats 1.27 tons per square.

Paring. Preparatory to paving the grade was neatly dressed, and when the materials were hard clays or buckshot soil, the stone was placed directly on them, but when soft materials or sand were encountered they were covered either by extending the connecting mattresses or with detached layers of small brush as a foundation. The stone used was in pieces weighing from 10 to 40 pounds, laid as close as practicable, the interstices filled with small stones, and the top covered with a layer of small broken stone or spalls. Care was thus taken to stop all large holes, for it was discovered that large openings permitted the wave wash to pass in and undermine the paving, whilst when the openings were small the interstices were quickly filled with sediment. When the paving was placed on a brush foundation no spalls were used.

The total pavement laid was 500,843 square feet. Of this 275,118 square feet was laid along the graded bank, 210,118 square feet being directly on the earth, and having no subfoundation. This portion reaches to the 22-foot stage, the average width above low water being 76 feet.

Two hundred and seventeen thousand three hundred and twenty-five square feet was laid on the old work of 1887-88, covering the bank froin low-water to near the mid-stage; 8,400 square feet was also laid in the pocket of the 1885 work.

The average thickness was 8 inches, being about 6 inches on the brush foundation, and upwards of 10 inches when placed directly on the earth. The cost, exclusive of grading and mattress foundation, was $0.0612 per square foot.

The approximate cost of completed revetment, 200 feet wide below the zero contour, with bank paved to the two-third stage, as deduced from the season's work, would be per lineal foot:

Accompanying this report is a tabulated statement showing expenditures in detail, with quantity of work done and cost per unit. Also a plan showing the location and dimensions of the work and the soundings. Respectfully submitted.

Capt. S. W. ROESSLER,

Corps of Engineers, U. S. A.

W. M. REES,

Assistant Engineer.

APPENDIX 5 C.

REPORT OF ASSISTANT ENGINEER C. W. STURTEVANT ON REPAIRS TO PLANT.

UNITED STATES ENGINEER OFFICE,
Memphis, Tenn., May 26, 1892.

CAPTAIN: I have the honor to submit the following report upon the repairs to plant at Amelia, Ark., for the year ending May 31, 1892:

District barges.-Five unserviceable barges, Nos. 55, 74, 76, 94, and 134, had new gunwales and rakes built; the bottoms were found to be in a good state of preservation and only required calking. Barge No. 135 had deck calked and pitched. Other barges in fleet have been calked and patched just enough to keep them afloat.

General-service barges.-Twenty-one barges, Nos. 40, 42, 44, 45, 49, 84, 141, 148, 169, 171, 181, 183, 189, 191, 206, 209, 212, 216, 221, 222, and 253, have been calked and repaired, ready for towing stone.

Mooring barges.-Four first and second district mooring barges were repaired and strengthened for last season's work. Two new mooring barges were built, using old bottoms from other barges, with new gunwales and rakes.

Mattress barges.-Four mattress barges were built, using old bottoms of district barges with new gunwales and rakes.

Quarter boats.-Quarter boat No. 27. Hull calked and patched, cabin and roof repaired and painted.

Quarter boat 11. Hull calked and patched, new rakes, new guards, and roof painted.

Quarter boat 30. Not docked; just patched and whitewashed.

Quarter boat 25. Thoroughly repaired and a set of hog chains placed fore and aft. Quarter boat No. 6. Thoroughly overhauled while on dock.

Quarter boat No. 39. Cabin repaired and painted, new guards, hull repaired above water line; not docked.

Quarter boat No. 28. Deck and cabin repaired.

Amelia No. 2. Ceiled, put in ventilators and screens.

Calking flats. Two calking flats were built and two old ones repaired.

Derrick boat No. 2. Hull and machinery received minor repairs and two cars built to unload stone on bank.

Machine boat No. 1. Painted and received only necessary repairs.

Machine boat No. 2. Painted and received only necessary repairs; also a new smoke. stack.

Pile-drivers have received only necessary repairs to hulls to keep them afloat.
No. 39 received a new water chamber for its Worthington pump.

Hydraulic grader No. 2 has been docked and received new 6-inch yellow pine gunwales and new rakes. This grader has been carefully overhauled both in hull and machinery. Two new water chambers have been placed instead of the old ones that were cracked. Two more openings were made for the flow of water into the wells in which the receiving pipes are placed.

Hydraulic grader No. 4 is now on the dock. A new water chamber was purchased during the season and has been used; one side only of the pump will be repaired, as the other side would require a new high-pressure cylinder and a new water chamber.

Second district grader No. 40 was repaired, calked, and painted; deck shored up under pump, and a fore-and-aft 5-inch yellow-pine bulkhead placed in center of hull under pump; also two sets of rods were placed from top of outside gunwales to bottom of middle bulkhead to assist in holding up the weight of the pump. The cabin and machinery have been overhauled and painted. The heater was found to be very leaky and likely caused the trouble with the vacuum. The main shaft was also found to be in wrong and was changed end for end. A new condenser was purchased during the year.

Steamboats.-Steamer Titan has three new boilers, with new boiler beams and breeching, also the system of feeding water into boiler has been changed from the pan in top of shell to a spray in mud drum. Two new and larger hog chain posts aft, two additional center and two additional forward hog chain posts and a second set of main hog chains, two knuckle chains under cylinders and a short chain under boilers fore and aft. Fantail been braced out and held up by a traverse system of chains. Iron straps attached to foot log on forward end of main chains was taken off and rewelded. Shore up main and boiler decks under pilot house. The wheel was rebuilt and painted. Pitman straps enlarged, machinery reset and lined. Steamer Graham has two new boilers in place of old ones worn out, also various other minor repairs to boat and machinery.

Steamer Kirns has received only such general repairs to boat and machinery as have been necessary to keep the boat in commission.

Steamer Itasca has had a new boiler, the hull, cabin, and wheel thoroughly overhauled and painted.

Steamer Abbot had three partially decayed strakes in the hull which were repaired, nineteen new wheel arms were replaced, also a set of buckets complete. Twelve iron straps were placed on each side to tie the deck beams down to the hull. The hull was calked and painted. A second feed pump was placed on the boat in the engine room for use in case of accident to the first one. The machinery reset and lined up, one new sheet placed in boiler, a rigging for raising and lowering meter at stern of boat was also arranged.

Sand pump boat.-The boilers were exchanged for better ones not in use on the fleet; a larger pulley for pump was purchased so that the engine might be speeded up to develop the proper amount of horse power, arrangements were made so as to take steam from boilers on steamer Graham.

Warehouse A.-A warehouse for storing boilers and machinery has been built 125 long and 30 feet wide and is raised up 6 inches above high water. It has oak and ash foundation timbers, cypress siding, cottonwood frame, and tin-shingle roof, and tin gutters.

General repairs.-There are many minor repairs to various pieces of plant that are classed under the head of general repairs, they were small amounts and at various times, and were necessary only to care for the plant or in construction of tools which could not be charged to a piece of plant as increasing its value.

There is inclosed herewith table of repairs giving cost of each piece during the

year.

Respectfully submitted.

Capt. S. W. ROESSLER,

Corps of Engineers, U. S. A.

C. W. STURTEVANT,
Assistant Engineer.

Table of cost of repairs to various pieces of plant at Amelia, Ark., from June 1, 1891, to

May 1, 1892.

Abstract of proposals for furnishing stone for use at Hopefield Bend, Arkansas, received in response to advertisement dated June 30, 1891, and opened July 14, 1891, by Capt. S. W. Roessler, Corps of Engineers.

Abstract of proposals for furnishing wire, wire strands, rope, etc., received in response to advertisement dated June 30, 1891, and opened July 14, 1891, by Capt. S. W. Roessler,

Corps of Engineers.

Abstract of proposals for levec work on Helena Front, Arkansas, received in response to advertisement dated July 30, 1891, and opened August 15, 1891, by Capt. S. W. Roessler, Corps of Engineers.

Abstract of proposals for levee work on Helena Front, Arkansas, received in response to advertisement dated September 9, 1891, and opened September 19, 1891, by Capt. S. W. Roessler, Corps of Engineers.