Statement of extent and net cost of dike work-Continued. DIKE NO. 2-Continued. Class and extent of work and quantities of material, etc. Cost per Cost of each item. Total. Attaching top braces to 24 linear feet 1-row, 58 feet 2-row, and 71 feet 3-row dike: unit. Attaching top braces to 32 linear feet 2 row and 20 linear feet 1-row dike: 840 feet B. M. yellow-pine lumber.. 19 screw bolts 1.545 + 46.38 18.06 64.44 Statement of extent and net cost of dike work-Continued. STATEMENT OF EXTENT AND NET COST OF STONE REVETMENT. ANNUAL REPORT OF MR. S. H. YONGE, DIVISION ENGINEER. MISSOURI RIVER COMMISSION, OFFICE OF DIVISION ENGINEER, COLONEL: I have the honor to submit my report of operations on improving the Missouri River on Osage division of first reach, for the part of current fiscal year terminating August 31, 1896, as follows: DIKE REPAIRS. On July 5, 97 feet of Dike 19 B, about 140 feet from its root, was breached. This was followed on July 7, by a breach about 90 feet long, through Dike 19 A, and 50 feet inside the dike head. The breaches gradually widened till July 31, when that at 19 B attained a width of 110 feet, and that at 19 A of 185 feet. During the latter part of the June rise, and almost the entire month of July, the Missouri was at a higher stage than the Osage, and there was, in consequence, a strong flow from the latter into the former over Osage Chute Dam. On account also of depressions in the accretions between Dikes 19 A and 19 B, referred to in the last annual report, the current through the outer part of the former and inner part of the latter was very swift. The apparent cause of the breaches was scour, resulting from the above-described current being deflected to and concentrated on the bottom by accumulations of floating driftwood above the dikes. The pressure of the current on the driftwood, being transmitted to the upper parts of the dikes, also contributed to breaching them. The stream end of Dike 19 A had been destroyed by scour in April, 1894, and was reconstructed in May, 1895, as 4-row dike, with heavy oak piles driven to 26 feet penetrations. The breached part of Dike 19 B was constructed of white cypress piles, with penetrations of 28 to 30 feet. I was directed by your letter of July 9 to renew the outer end of Dike 19 A. The high stage of the river, however, did not permit this being done until July 31. The new work was made 4-row dike with a 3-row "L," 95 feet long. Pine piles were used exclusively and were given penetrations of about 27 feet. Besides the usual top bracing the pile structure was reenforced at each bent by a double wire strand stay or inch diameter. They were attached to the piles of the front row at the ground and extended to those of the back row at their tops, where, after being tightened by means of tackle and the power capstan of a 64-foot barge, they were made fast. The work was completed August 12. Its cost was $1,942.99. GENERAL RESULTS OF IMPROVEMENT WORKS. Cross sections on the lines of one of the dikes of each group shown on Plates I, II, and III represent the building up of accretions around the dikes since their construction. The improvements in channel at the same sections, either by enlargement or changed position, are also shown up to the dates thereon indicated. There is also submitted a longitudinal section of the improved reach of river, showing the depths and slope of water surface for about a five-eighths stage. The deep hole at the stream end of Dike P resulted from an eddy formed by the meeting at right angles of two currents-that of the main channel normal to the dike and that from behind the towhead opposite and below Jefferson City, flowing parallel to and above the dike. The same feature at Dike No. 34 was produced by somewhat similar causes. Discharge measurements made about the middle of August with the river about a five-eighths stage, near Ewing boat yard, between the head of Dodds Island and Ferguson Island and in Ferguson Island Chute, showed a loss of about 25 per cent in volume over Osage Chute Dam, and of 11 per cent additional through openings in the accretions between the dam and the head of Ferguson Island. To these diversions of flow are to be attributed a noticeable shrinkage in channel areas and reduction in depth at the two lower localities. PLANT. During and after the June rise the floating plant was laid up at the bluffs, about 1 mile below the Ewing boat yard. The roofs of construction quarter-boats Nos. 3 and 6 were repaired, also the calking of three 100-foot barges, four 64-foot barges, hydraulic grader No. 8, carrrying a Cram steam hammer, and the division office boat. A burnt sheet of the steam tender Atalanta boiler was replaced by part of a new ring, and the boiler tested to 186 pounds hydrostatic pressure. One of her cranks, which had worked loose, was shimmed and secured by three steel pins. The boat was also painted. The old heater of the steam tender Melusina was replaced by a copper-coil heater from one of the pile sinkers and her furnace liners repaired. Some changes were also made in the roof of the boat, with a view to reducing the high temperature in the engine room. Slight repairs were also made to the Vulcan Nasmyth steam drivers, and the office boat launched. The total expenditures on account of plant amounted to $3,470.85, of which $500.37 were for repairs. The work of improving the Missouri River on Osage Division and such plant and property pertaining to it as were not required for carrying on construction works at up-river points were, by your direction, transferred to Mr. S. Waters Fox, Division Engineer, on September 6. Very respectfully, your obedient servant, Lieut. Col. AMOS STICKNEY, Corps of Engineers, U. S. A., SAM'L H. YONGE, Division Engineer. President Missouri River Commission. APPENDIX I. ANNUAL REPORT OF MR. S. WATERS FOX, DIVISION ENGINEER-OSAGE DIVISION. MISSOURI RIVER COMMISSION, COLONEL: I have the honor to transmit herewith a report of the operations under my charge on the Osage Division during the period from September 6 to the end of the fiscal year of 1897. On the 24th of August you notified me of the assignment to my charge of the work continuing the improvement in Osage Division of first reach. The transfer was completed September 6, and thereafter operations were conducted under my supervision. The following illustrations accompany the report: A map (PI. I) of the river from a point about 1 mile below Claysville, Mo., to Isbell Station, Mo., as developed from the regular annual fall survey of October, 1896, showing proposed lines of rectification, the location and character of improve ment works completed, in progress of construction, and proposed; also cross sections of the river at intervals of about 1,000 feet, and steamboat channels. One map (Pl. II) of the river between Dikes 17 and 36, showing proposed change of plan for junction of Osage and Missouri rivers. One drawing (Pl. III) showing in cross section the proposed cut through Osage Point as approved. One drawing (Pl. IV) showing in cross section the arrangement of Dike 19 A as first planned and approved. Four photographic views (Pls. V to VIII) showing dikes in process of construction and completed. One hydrographic chart (Pl. IX) showing the position of a sheer dike above Dike 29 A and the local changes in conditions of flow produced by it. The operations comprised the construction of new dike; the extension, repairs, alteration, and removal of old dikes; revetment repairs; procuring construction materials; surveying; care and repair of plant, and the usual miscellaneous, incidental, and office work. The work was done under an allotment of $164,000 from the appropriation of June 3, 1896, for continuing the systematic improvement in first reach, and in accordance with a project dated September 30 and approved by you under date of October 2. This project was based upon yours of August 18, which was approved by the Chief of Engineers, United States Army. In brief it provided in detail for the prosecution of the new plan for a junction of the Osage and Missouri rivers in the vicinity of Cote Sans Dessein, and conditionally for the following work: The degrading of the outer end of Dike 19 A; the protection of the shore end of Dike 23; the construction of a.sheer dike above Dike 29 A and the reenforcement of the bracing on the latter structure; the restoration of the outer ends of Dikes 34, 35, and 36 to the proposed line of rectification, and the construction of a new dike, 37 B, across Bear Island Chute at the head of the island. The total expenditure during the year was $58,939.46, as shown in Appendix, Exhibit H. NEW JUNCTION OF OSAGE AND MISSOURI RIVERS. Scheme. The accompanying map (Pl. II), with its explanatory notes, shows so clearly the general scheme, that I beg leave to refer to it and the following extract from a resolution of the Missouri River Commission passed July 17, 1896, for a full presentation of the matter: "The effect of the work done in the vicinity of Dodds Island has been to produce a difference in level of water surface in the Missouri River and the Osage at the head of this island, when the Osage is not in flood, of about 3 feet. In consequence of this difference of level the dikes above the head and at the foot of this island have been breached a number of times, and the low dam extending out from the head of the island has required frequent repairs and extensions. It is believed that this difference in water level on the opposite sides of the island would always be a source of danger to the works, and by their breaching cause a filling up of the channel of the Missouri River. These effects have become more and more apparent as the dike work has progressed toward and below the foot of Dodds Island. Moreover, the low-water flow of the Osage, being extremely small in volume, it is believed could not maintain a navigable channel through the chute behind the island without extensive construction works for reducing the cross-sectional area. For these reasons provision should be made at an early date for bringing the Osage into the Missouri at its natural mouth at the head of Dodds Island and for closing the chute behind that island." The order in which it was proposed to carry on the work was as follows: The degrading of Dikes 25 and 26 and the closing of the breach at the shore end of Dike 19 B to be commenced on receipt of authority; the two-row pile work in Dike 19 A was next in order, but as the foot mattress did not extend above the upper row of piles its construction was to be deferred until the purchase of the land had been made; the cut through Osage Point having been made and Dike 19 A completed, that portion of 19 B lying within the limits of the proposed low-water way was to be removed; then the in-shore portion of that dike, the Osage Dam, and Osage Point revetment were to be degraded; then, if necessary, to cause a flow through the new cut, a ditch 15 feet wide was to be cut through the accretions below 19 B on the proposed line; the construction of Dikes 32, 33, and 33 B was to await the development of the proposed low-water channel way through Osage Point to a junction on the proposed line with the Missouri River. Degrading Dike 25.-Because a favorable stage of river did not sooner occur the work of lowering this dike, and also No. 26, was deferred until early in December. To have lowered them to the extent proposed in the project would have involved a very large expense in the removal and excavation of extensive rack heaps and accretions which had formed, and accordingly the dikes were lowered as far as possible without excavation. Between the 3d and the 6th of December the outer 42 feet of Dike 25 and 50 feet of its trail were cut down to an elevation of 2.2 feet above standard low water, and rebraced, and a large drift pile 60 feet from the outer end of the dike was fired. Degrading Dike 26.-The lowering of the grade of this dike was accomplished as far as practicable between the 4th and 8th of December. The braces on the outer 200 feet of the main dike and the trail were removed. The outer 32 feet of the dike and 48 feet of the trail were cut down to grade and rebraced. Dike 19 B.-The construction of 208 linear feet of two-row work to close the gap at the shore end of Dike 19 B was commenced October 13 and completed on the 23d of the same month. A photographic view of this work is shown on the accompanying Pl. V. The work of removal of that portion of this dike and its accumulated drift which lies within the proposed low-water channel way of the Osage River was begun on December 3 and continued throughout that month, and at times during January and February as the weather and stage of river permitted. The degrading of the same structure beyond the limits of the low water and within those of the high-water lines was also begun at the same time. The dike is a three-row structure built in 1895; the original penetration of the piles was 25 feet, which had subse quently been increased by the accretions to an average of about 30 feet. Of the 1,550 linear feet of the dike which lies within the proposed Osage River channel, 682 linear feet were within the limits of the low-water way and were to be entirely removed, and the remaining length to be degraded to a slope from standard low water to 3 or 4 feet above it, between the limits of the right-bank low-water way and the line of high-water flow. The pulling of the piles was undertaken with two pairs of shears, each rigged for pull with a horse capstan of six 6-inch manila lines. Some of the piles were extremely difficult to pull, and several broke in two under practically a straight strain. The total number of piles got out was 82. The wales and braces were removed from the entire 1,550 feet of the dike and the piles within the limits of the proposed high and low water way cut down as close to the required grade as possible. The drift within the lines of low-water flow, which covered an area of about 2 acres from 2 to 10 feet deep, was fired and about three-fourths of it reduced to ashes. Coal oil was liberally used to assist in the firing, but some of the larger pieces were so water-soaked that their burning was difficult. Dynamite was used to loosen large pieces of the drift, so that it might be piled up in heaps to facilitate burning. Cut through Osage Point.-The proposed cut through Osage Point as approved is shown in cross section on the accompanying Pl. III. In accordance with instructions contained in your letter of September 10, negotiations were at once begun with the owner for the purchase by the United States of all the land on Osage Point lying to the eastward of the left bank of the proposed waterway, and as it was thought that that could be quickly consummated, arrangements were made, by your direction, for hiring and promptly assembling on the ground the necessary excavating plant and operating crews. But as it was not until the latter part of May-some eight months later that the purchase was finally completed, and as ownership by the United States was an essential preliminary, no work was done on the cut. Dike 19 A.-This structure as originally designed and approved is shown in accompanying Pl. IV. It is intended to constitute the left bank of the proposed waterway of the Osage River from its intersection with the main right bank of the Missouri River on Osage Point to a point a short distance beyond its intersection with Dike 19 B. It was to consist of an embankment of earth built to an elevation of 5 feet above standard high water and reinforced on the lower or Osage River side by a 2-row pile structure, the latter to extend from Dike 19 B to the right bank of Osage Dam Chute, at an elevation of 7 feet above standard low water. On October 16, by your direction, work on the pile structure was commenced, it having been decided to change the arrangement so that that part of the dike would lie on the upper or Missouri River side of the embankment. It was completed on the 28th of November. The accompanying photographic views, Pls. V and VI, show the dike as it then was. Two hundred and sixty-six piles were driven in the dike in bents of 2, spaced 10 feet each way, to an average penetration of 26.8 feet, and 9 for temporary anchorage. One thousand three hundred and ninety-three linear feet, or 59,380 square feet, of foot mattress was woven. The mat was 60 feet wide within the limits of the waterway of Osage Dam Chute and 30 feet wide on the dry bar; the lower edge of it was flush with the lower row of piles. A pole curtain was put on that portion of the dike in the waterway. The system of bracing shown in cross section on Pl. IV was followed. The wales were 6 by 8 inch lumber on the upper row and 5 by 8 inch on the lower row, and were bolted to the piles with 4-inch screw bolts. The direct bracestwo pieces of 4 by 8 inch-embraced the piles and were bolted to them with 4-inch screw bolts. They rested on the top wales (upper and lower row) and were gained on them 1 inch to take a thrust. The drop braces were made of two pieces of 4 by 6 inch stuff, separated at the lower end by a 3-foot block so as to embrace the pile at the river bottom. A sling of four parts of §-inch wire strand passed around the |