For a detailed account of the operations at this harbor attention is respectfully invited to the report of Assistant Engineer William T. Blunt, which is transmitted herewith. Mr. Blunt includes in his report, in a very concise form, some valuable results of triangulation in Sandusky Harbor, and it is respectfully recommended that these be published, as they have more than a local interest. An appropriation of $185,000 is recommended for this harbor, of which $175.000 is from the authorization of the river and harbor act of March 3, 1905, and will be used for continuing the improvement in accordance with the approved project, and $10,000 is for the maintenance of improvement and will be used for repairing and maintaining the permanent works and also for maintaining depths in the channel. Money statement. July 1, 1904, balance unexpended. 148, 659. 88 11, 458. 08 137, 201. 80 137, 001.80 10, 653. 58 480,000.00 June 30, 1905, amount expended during fiscal year, for maintenance of improvement July 1, 1905, balance unexpended.. July 1, 1905, balance available July 1, 1905, amount covered by uncompleted contracts.... Amount (estimated) required for completion of existing project Amount that can be profitably expended in fiscal year ending June 30, For maintenance of improvement Submitted in compliance with requirements of sundry civil act of June 11, 1844. August 30, 1852 June 28, 1864 (allotment) June 23, 1866 June 11, 1870 June 10, 1872 June 18, 1878 AMOUNT AND DATE OF ALL APPROPRIATIONS. $15,000.00 August 5, 1886 $175,000.00 25,000.00 25,000.00 June 13, 1902 25,000.00 25,000.00 12,500.00 September 19, 1890. 185,000.00 $5,000.00 40,000.00 45,000.00 41, 712.00 Unexpended July 1, 30,000.00 40,000.00 80,000.00 125,000.00 April 28, 1904 (allotment) .. 10,000.00 125,000.00 Total.... Name of contractor: John J. Stang, Lorain, Ohio. Date of contract: September 27, 1902. Date of approval: October 18, 1902. Date of commencement: November 14, 1902. CONTRACT IN FORCE DURING THE FISCAL YEAR ENDING JUNE 30, 1905. Contract for dredging at Sandusky Harbor, Ohio. Date of completion: November 20, 1903. (Extended to include working season of 1904; extended to include working season of 1905.) Sand. Stone The following statistics for the year 1904, relative to the commerce of the harbor of Sandusky, Ohio, were compiled from information furnished by the collector of customs and others: Fish.. Grain Iron ore. Iron, pig Merchandise, miscellaneous. Plaster. Pulp wood Salt Total. Receipts. COMMERCIAL STATISTICS. Total registered tonnage: 1904. 1903. Increase..... Draft of largest vessels using harbor, 20 feet. REPORT OF MR. WILLIAM T. BLUNT, ASSISTANT ENGINEER. Number. Tonnage. 1,436, 615 37, 125 1,164,924 1, 165, 179 2, 330, 103 740, 203 TOLEDO, OHIO, July 1, 1905. COLONEL: I have the honor to submit the following report upon Sandusky Harbor, All depths mentioned are given at mean level of Lake Erie, 1860-1875, the surface Dredging. The rock dredging under contract of John J. Stang, dated September 27, 1902, had not been begun at the end of the fiscal year, but it seems now certain that it will be entered upon within a few days. Under an emergency appropriation of $10,000 the U. S. dredge Maumee worked in the Straight channel and East Dock channel August 5 to October 4, removing 42,609 cubic yards from the Straight channel and 8,320 cubic yards from the East Dock channel; and the Detroit Dredging Company dredge No. 2 worked on the West Dock channel October 6 to November 12, removing 27,217 cubic yards. Under provisions of the river and harbor act of March 3, 1905, a contract was entered into with the Great Lakes Dredge and Dock Company, of Chicago, Ill., for the completion of the dredging necessary to obtain a channel 21 feet deep, 400 feet wide from Cedar Point to the Baltimore and Ohio wharves (Straight channel) and 300 feet wide, thence up to the "Short Line" wharves now operated by the Pennsylvania Company (Dock channel). Under special permission the contractor was allowed to begin work before the contract was signed. Its dredge No. 3 began work at outer end of Straight channel June 20, and while it is a very large and effective machine, it has been working with small scow capacity and not attempting rapid work. Up to June 30 this dredge had removed 31,301 cubic yards. Summary of work under 21-foot project of 1900. Cubic yards. Total removed from all channels under 21-foot project previous to contract of the Great Lakes Dredge and Dock Company. Of which there came from the West Dock channel. 489,879 42, 723 TRIANGULATION OF SANDUSKY HARBOR. Total from channels to be finally improved ..... 447, 156 It should be explained that the West Dock channel will now be made on the straight continuation of the Main or East Dock channel. Heretofore funds have been insufficient to do any conclusive work upon the new line, and such work as was done was on the old cut bending southerly from the main channel. Condition of channels.-There has been no opportunity to carefully examine the channels this spring, but such casual knowledge as can be gained indicates that the 21-foot channel is holding well, both in depth and width. Vessels of the deepest draft which can pass the rivers have no difficulty in reaching the Baltimore and Ohio wharves, while up to the Pennsylvania wharves the depth is still limited by the ridge of rock to be partially removed under the Stang contract. Condition of permanent work.--All the jetties, bank protections, etc., are in excellent condition, except that the submerged dam extending westward 1,000 feet from the Straight Channel front light has been badly torn apart and spread. At various times since 1892 the work of triangulating this harbor has been accomplished as time allowed or necessity called for. The results have now been computed and tabulated, and are believed to be of such accuracy as to justify their publication for reference and preservation. All work was done with Buff & Berger transit No. 743, reading to 30 seconds, and by estimation easily to 15 seconds, on a 6-inch circle, by 2 verniers. The repetition method was used, as being best adapted to the existing conditions, great care being taken to eliminate constant errors, but owing to the work being spread over so many years and carried on in such a desultory manner, the results are not up to the standard of 3-second work, which was intended. Average closure of triangles was about 4 seconds. A base line was measured on Johnson Island with a Chesterman steel tape, whose length had been determined by comparison with the Mississippi River Commission standard. After correction for temperature, inclination, and sea level, the two measurements were 3,274.304 and 3,274.292 feet; mean, 3,274.298 feet. The old value of meter has been used in reduction, viz, 3.28087; logarithm, 0.5159889. The light-houses at Cedar Point, Straight Channel front, and rear outer were occupied in eccentric positions and used in the net, while the two rear lights of the ranges were not occupied. The azimuth, east base to west base, as given in United States Lake Survey Report, 1902, was used in the reduction. As west base could not be seen from east base, the angle, steeple to west base, as given in Professional Papers, No. 24, was used, and angles were read at east base and bowlder to connect with the work. The only points in this work which are given in the Lake Survey Report, 1902, are Sandusky court-house (clock tower) and Cedar Point light-house, whose positions are named to hundredths of seconds. From these two, and lengths computed from Johnson Island base, the position of crib was computed, with close agreement. Taking the mean value of crib L. and M. to third decimal, and applying the corrections backward, values of L. and M. for clock tower and Cedar Point light-house were obtained to third place, and these were used in the computation, as they agree in second place with the published record. For check on the work, it is found that inverse computation of azimuth-clock tower to Straight Channel front agrees within 1 second with the azimuth at Straight Channel front as computed from direct observation; also that the distance, clock tower to Cedar Point light-house, as computed from Johnson Island base, fulfills the adopted positions in third decimal. A sketch on tracing cloth accompanies this report, upon which are shown the relative positions of triangulation points herein described. The results of the work are given in the following table, and the computations in detail are on file, bound together for preservation: ENG 1905 M -146 a Not printed. |