The accepted work of excavation since the beginning of the improvement has cost $35,718.29. The filling at League Island has cost $27,334.92. Repeated surveys have been made to determine the changes in progress. The contractors expect to excavate 250,000 cubic yards of material during July, 1892, and at least 300,000 cubic yards per month thereafter. July 1, 1892, amount covered by uncompleted contracts .... 616, 266.90 635, 791.44 Amount appropriated by act approved August 5, 1892.. (Amount (estimated) required for completion of existing project Amount that can be profitably expended in fiscal year ending June 30, 1894 Submitted in compliance with requirements of sections 2 of river and harbor acts of 1866 and 1867. (See Appendix G 2.) 41,000.00 2,759, 000.00 500,000.00 3. Schuylkill River, Pennsylvania.-When the work of improvement was commenced in 1870 there was a channel of entrance into the mouth of the river carrying a depth of only 10 feet at mean low water. The original project under which work was commenced in 1870 proposed the formation of a channel 100 feet wide, with a depth of 20 feet from the mouth of the river to Gibson Point, about 4 miles, and a depth of 18 feet from thence to Chestnut Street Bridge in Philadelphia, about 3 miles. In 1875 and 1883 this project was amended so as to increase the lowwater channel between the mouth and Girard Point, a distance of about 1 mile, to 400 feet wide and 24 feet deep, and from Girard Point to Gibson Point, about 3 miles, to 250 feet wide and 20 feet deep. The amount expended upon these projects to June 30, 1891, was $413,732.71. This work had resulted in the formation of a channel about 100 feet wide and from 18 to 20 feet deep at mean low water across the bar at the river's mouth; a channel about 250 feet wide and from 20 to 24 feet deep from inside the bar to Point Breeze, except at Yankee Point, where the width is 300 feet; and from Point Breeze to Gibson Point, a channel from 100 to 200 feet wide and from 18 to 20 feet deep; from thence to Chestnut Street Bridge a channel of navigable width and from 17 to 20 feet deep. During the fiscal year ending June 30, 1892, the sum of $1,299.07 was expended in dredging in the channel above Penrose Ferry Bridge to remove a dangerous obstruction, in surveys at the mouth, and in the preparation of a project for the improvement of the channel across the bar by means of dikes. During the month of June, 1892, contracts were entered into for the construction of dikes at the mouth of the river. All the work contemplated by the project under which the improvement has heretofore been carried on will be completed with the appropriation made by the river and harbor act approved July 13, 1832. A project for additional work at the mouth of the river (given in full with ENG 928 the annual report of the officer in charge) was approved April 26, He taughting the work under this modified project is estim belive expended.. i kutapended during fiscal year. AllII: artered by uncompleted contracts. ALVET INDE reused - ki approved July 13, 1892 san unr a maladie de tscal year ending June 30, 1893...... estuminei persized fz completion of existing project ..................... Som Tela rue A requirements of sections 2 of river and 44,9 I betur e Kors H. Pennsylvania.-This work, in its p eet glua. Vis summenced in 1906, the object being to provide a hai elvice Ever to protect vessels against moving ice. MUS the Conmen wealth of Pennsylvania built, for the convenie í s mreze, perrs at Marets Hk, extending from the shore line i It is assumed that at some subsequent time these sh viers vere mozled over to the United States, since in 1829 an approp made »2 $5,000 for repairing these piers, improving the hart and removing obstructions. No further appropriation was made u At this latter date the project was adopted for the construction detached piers in the harbor, consisting of stone superstructures up ero soundations filled with stone, together with the deepening of Barber by dredging. In 1881 it was proposed to increase the area of the harbor by the co strection of a bulkhead about 1,800 feet in length parallel to the sh e, and about 150 feet outside of high-water line and the deepening this added area by dredging. Nothing was done towards the carryi ito effect of the modification of 1881, on account of the objections sore of the abutting property owners, and in 1888 this hitherto p posed modification was abandoned and an increased depth propos for the areas protected by the detached piers outside of the natural sho e of the river. The amount expended from 1866 to June 30, 1891, was $208,963.6 and resulted in the construction of two shore or landing piers an seven detached ice piers, the deepening by dredging of the area pr tected by the piers, and the placing of mooring piles within the harbo By this expenditure a harbor was formed with an area of about 10 acre carrying a depth of from 12 to 25 feet at mean low water. During the fiscal year ending June 30, 1892, $36.36 was expended i examining the harbor with a view to making necessary repairs and i office expenses. A contract was made for the repair of landing pie and the replacement of mooring piles. The funds remaining after th execution of this work will be held for such incidental repairs as ma be required from time to time. July 1, 1892, amount covered by uncompleted contracts. 1,014.34 1, 125.58 3,874.42 July 1, 1892, balance available (See Appendix G 4.) 5. Ice harbor at head of Delaware Bay, Delaware.-The act of August 2, 1882, appropriated $25,000 for the commencement of work on the ice harbor at the head of Delaware Bay, to include the removal of some sunken piers, the remains of an old ice harbor, in the channel east of Reedy Island, Delaware. The desirability of an ice harbor at the head of Delaware Bay has been long recognized, but until the improvement of the main ship channel shall have been materially advanced it is believed that appropriations can be applied, with better results to commerce, to the improvement of the channel rather than to the formation of an ice harbor suited to the requirements of the case. As to location, the prevailing judgment would place the ice harbor at or very near Liston Point, but since the works already planned for the improvement of the channel in this part of the river involve the construction of about 11 miles of dikes, the changes which may result from such extensive constructions render the prior location of an ice harbor hazardous. The amount expended to June 30, 1891, was $8,763.07, of which $3,700 was applied to the removal of the sunken piers back of Reedy Island, as provided in the act of August 2, 1882, making the appropriation of $25,000. The balance was expended in surveys, examinations, preliminary studies, and office expenses. During the fiscal year ending June 30, 1892, no expenditures were made. July 1, 1891, balance unexpended.. (See Appendix G 5.) $16, 236.93 16, 236, 93 6. Construction of iron pier in Delaware Bay, near Lewes, Delaware.— The original project for this work proposed the construction of a landing pier about 1,700 feet in length, extending from the shore south of the breakwater into Delaware Bay to a depth of 22 feet at mean low water, the pier to consist of a substructure of wrought iron screw piles surmounted with a timber superstructure. The work was commenced in 1871, and completed, except as to superstructure, in 1880. The amount expended to June 30, 1890, was $368,453.66, and resulted in the construction of 1,155 linear feet of pier 21 feet in width, and 546 linear feet 42 feet in width, or a total length of 1,701 feet. The depth of water at the outer end of the pier head was about 21 feet at mean low water. During the fiscal year ending June 30, 1891, $7,033 was expended in replacing about 200 linear feet of the pier destroyed by the collisions of wrecked vessels in 1889, and in placing fender piles along 1,200 linear feet of the shore arm of the pier. The total amount expended during the fiscal year ending June 30, 1891, including inspection and office expenses, was $9,623.89. During the fiscal year ending June 30, 1892, $422.45 was expended in office expenses. From the decayed condition of the timber superstructure of a large part of the pier it is not available for use by the railroad, to which right was given to use the pier uuder the provisions of the act of J 15, 1870. If the pier is to be rendered available for the general purposes railroad traffic, as contemplated in the act above referred to, it will necessary to replace the present decayed wooden superstructure by iron construction, which has been estimated at $93,000. The sundry civil act of March 3, 1891, contained the following I vision: And the Secretary of War is hereby directed to assign to the Secretary of Treasury so much space on the Lewes iron pier as may be necessary to enable Marine-Hospital Service to establish and conduct thereon such disinfection mael ery as may be required for the proper disinfection of the cargoes of vessels detai at the quarantine, and when the breakwater shall have been completed then said pier shall be permanently assigned to the Treasury Department: Provided, T such occupation and use of the pier by the Marine-Hospital Service does not in fere with the engineering operations of the War Department in the completion the breakwater improvement. It is understood that the use of the pier as above provided will times prohibit its use for any other purpose. The pier is of conside able value to vessels frequenting the breakwater harbor, being t only communication with the shore; it is necessary for the purpose the Light-House Service, and its free use at all times will probably indispensable for many years for the engineering operations of t War Department. It is not suitable for quarantine purposes, becau the maximum depth at the end of the pier head is only about 21 fe at mean low water. The depth is still less on the sides. Since t pier is much exposed to storms, it could not be safely used in roug weather by vessels of a greater draft than about 15 feet. The gre majority of vessels frequenting this harbor (including nearly all the arrive from foreign ports) could not generally be taken to this pier fi the purpose of disinfection. It is therefore suggested that other a rangements be made for the requirements of the quarantine service. July 1, 1891, balance unexpended..... June 30, 1892, amount expended during fiscal year. (See Appendix G 6.) $422. 422. 7. Delaware Breakwater, Delaware.-Under the act of Congress, Ma 7, 1822, $22,700 was appropriated for a survey of Delaware Bay, nea Cape Henlopen, for the purpose of determining upon the site for a ha bor of shelter. In 1828 an appropriation of $250,000 was made for com mencing the work under a plan submitted by a board of commissioner appointed by Congress. The project of the board contemplated the construction in the con cavity of the bay, just inside Cape Henlopen, of two massive works on the pierres perdues or riprap system, separated by an interval or ga of 1,350 feet, the greater, called the breakwater, to afford safe anchorag during the gales from the north and east; the other, called the ice breaker, to protect shipping against northwesterly gales and the heavy drifting ice of the bay. This project was completed in 1869, under aggregate appropriations. including the first for survey, of $2,192,103.70. The stone used in the work amounted to 892,528 gross tons, and varied from one-quarter of a ton to 7 tons in weight, the smaller constituting the bulk of the mass, the larger used to cover the exterior slopes. As completed in 1869 the breakwater is 2,558 feet long, and the icebreaker 1,359 feet long on top. The average width on top is 22 feet, and at base 160 feet. The top is from 12 to 14 feet above mean low water. In 1882 a project was adopted for closing the gap between the breakwater and the ice-breaker by means of a random stone foundation with a concrete superstructure. The random stone foundation was to be brought to a height of 12 feet below low water, with a width on top of 48 feet; the concrete superstructure to have a width on bottom of 24 feet, rising to a height of 12 feet above mean low water, with a width on top of 12 feet. The estimated cost of this project was $675,000. In 1883 and 1884 the project was modified by providing a foundation of brush mattresses for the random stone superstructure and omitting the construction of a pile bridge across the gap, which formed part of the project of 1882 for closing the gap. In 1890 the concrete superstructure was further modified by establishing its base at 15 feet below mean low water by making it rectangular in section, with a width of 27 feet and height of 27 feet, and by constructing the work to above the plane of high water of large concrete blocks, above which concrete in mass is to be used. The estimated cost of the modified project, including the $356,250 appropriated from 1882 to 1888 was $856,250. In 1891 the random stone substructure having been practically completed, the project for the hitherto proposed concrete superstructure was modified by substitution of random stone for the remaining part of the work, so as to raise the structure to a height of 14 feet above mean low water, with a width on top of 20 feet, the width at low water to be 40 feet, and the slopes below this plane to be such as may be formed by the action of the sea, between low water and the top the slopes to be about 1 on 0.7 formed by heavy stones laid in position. The estimated cost of completing this part of the work is $320,000, or, including the $436,250 appropriated from 1882 to 1890, the cost of closing the gap is $756,250. From the beginning of the work in 1822 to June 30, 1891, the total amount expended was $2,549,155.79, of which $357,052.09 was expended on the project of 1882 for closing the gap. During the fiscal year ending June 30, 1892, the sum of $78,212.08 was expended in raising the structure in the gap to the level of mean low water over a distance of 1,006 feet. It is important that this work should be completed as soon as possible, since in its present condition it is a serious danger to commerce. The increase in the dimensions and draft of vessels since the present harbor was designed in 1822, together with the shoaling which has ensued behind the breakwater, renders the present harbor under these changed conditions inadequate for the requirements of commerce. Upon the completion of the present project of closing the gap, additional anchorage area will be added to the harbor and make it of great and continued value to coasting vessels. July 1, 1891, balance unexpended June 30, 1892, amount expended during fiscal year.. July 1, 1892, balance unexpended Amount appropriated by act approved July 13, 1892 Amommt available for fiscal year ending June 30, 1893. $79, 197.91 78, 212.08 985.83 50,000.00 50,985.83 Amount (estimated) required for completion of existing project 270,000.00 harbor acts of 1866 and 1867. (See Appendix G 7.) 8. Rancocas River, New Jersey.-In its natural condition Rancocas River carried a minimum low-water depth of about 44 feet between the |