Cost and financial summary Cost of new work to June 30, 1945. Cost of maintenance to June 30, 1945. Total cost of permanent work to June 30, 1945. Net total expenditures- Total amount appropriated to June 30, 1945_. Amount (estimated) required to be appropriated for completion of existing project $14,000 7. DULUTH-SUPERIOR HARBOR, MINN. AND WIS. Location. This harbor is at the extreme western end of Lake Superior. The cities of Duluth, Minn., and Superior, Wis., are situated on the north and south sides, respectively. (See U. S. Lake Survey Chart No. 966.) Previous projects.-Superior and Duluth were separate improvements until consolidated by the River and Harbor Act of June 3, 1896. The original project for the harbor at Superior City was adopted by River and Harbor Act of March 2, 1867; for Duluth Harbor by River and Harbor Act of March 3, 1871. These projects were modified by River and Harbor Acts of March 3, 1873; March 3, 1881; July 5, 1884; August 5, 1886; August 11, 1888; and July 13, 1892. For further details, see page 1929 of Annual Report for 1915, and page 1400 of Annual Report for 1938. Existing project. This provides for the following work: (a) Rebuilding the canal piers at Duluth entry with stone-filled timber-crib substructure and concrete superstructure 1,734 feet long and 300 feet apart for 1,250 feet, then flaring to 540 feet apart at the harbor end. (b) Replacing the north and south piers at Superior entry with concrete piers, 2,096 and 1,584 feet long, respectively, 500 feet apart for 808 feet then flaring at the harbor end. (c) Constructing 4,205 feet of rubble-mound breakwaters, 900 feet of concrete pierheads on stone-filled cribs, and 896 feet of concrete shore revetments at Superior entry, the lake ends being 600 feet apart on the 30-foot contour in prolongation of the entrance channel and diverging to 2,100 feet apart at the shore line. (d) A flared lake approach to Duluth entry 32 feet deep, and a channel between the piers 32 feet deep at the pierheads, gradually decreasing to 26 feet at the harbor basin. (e) A depth of 26 feet in the northern part of the harbor basin inside Duluth entry consisting of 201 acres; a depth of 25 feet in the southern portion of the harbor basin and part of the East Gate Basin; and a depth of 22 feet in the remainder of East Gate Basin, and in Superior Front Channel, through Superior Bay, 600 feet in width, extending to Superior Harbor Basin, a distance of 13,200 feet. (f) A flared lake approach to Superior entry 32 feet deep; a channel between the breakwater entrance and the pierheads with a width varying from a minimum of 600 feet to a maximum of 1,100 feet, 32 feet deep at the breakwater entrance, gradually decreasing to 28 feet at the pierheads; a stilling basin of 20 acres, 24 feet deep, inside the breakwater; and a channel between the piers, 28 feet deep at the pierheads, gradually decreasing to 25 feet at the harbor basin. (g) A harbor basin of 290 acres, 25 feet deep, inside Superior entry; a channel in Allouez Bay 2,100 feet long, 400 feet wide, and 22 feet deep; a depth of 25 feet in the south channel of St. Louis Bay from the entrance (East Gate Basin) to the cross channel, inclusive, with widths varying from 500 to 900 feet. (h) A depth of 25 feet in a cross channel, with minimum width of 1,150 feet, and a depth of 25 feet in the north channel of St. Louis Bay opposite the cross channel; elsewhere in the north channel and the south channel and the St. Louis River to a point 9,600 feet above the Grassy Point Bridge, a depth of 21 feet, and, except at Arrowhead Bridge, a minimum width of 400 feet; and a channel thence up St. Louis River 20 feet deep and 200 feet wide to Spirit Lake (southerly end of Big Island) a distance of about 14,200 feet. (i) A channel in Howards Bay 6,000 feet long, narrowing in width from 300 to 125 feet, and 21 feet deep; and a channel 3,300 feet long, 100 feet wide, and 20 feet deep at Twenty-first Avenue West in Duluth. The project depths are referred to low-water datum for Lake Superior, which is 601.6 feet above mean tide at New York. Highest single gage reading, November 28, 1905, was 3.7 feet above lowwater datum; lowest single gage reading, January 23, 1926, was 1.95 feet below low-water datum; the annual fluctuation is about 1 foot. The estimate of cost for new work, revised in 1932, was $7,100,000, exclusive of amounts expended on previous projects. The latest (1932) approved estimate for annual cost of maintenance is $100,000. The existing project was authorized by the following river and harbor acts: Terminal facilities.-Except that the facilities for handling package freight, lumber, and general merchandise are susceptible of improvement, the terminal facilities, consisting of wharves, ore docks, and grain elevators, are believed to be adequate for existing commerce, and are being increased as necessity demands. Operations and results during fiscal year.—The following maintenance work was done by United States plant: 184,460 cubic yards of material were dredged from Superior Harbor Basin and Superior Front Channel; 703 tons of stone were placed in repairing the Superior Entry rubble mound breakwaters; and 1,053 tons of stone were placed in riprapping the Duluth Ship Canal Piers. The costs of the various items of work done during the year were as follows: $71,505.92 for dredging; $15,639.63 for breakwater repairs; $10,815.48 for pier repairs; $15,512.15 for safeguarding United States property; $3,579.34 for maintenance of parks and grounds; and $14,702.71 for inspections, surveys, harbor patrol, and contingencies. The total costs were $131,755.23, all for maintenance. The total expenditures were $130,112.10. Condition at end of fiscal year. The existing project was completed in 1935. The following work has been accomplished: Dredging of channels and basins under the existing project was completed in 1935; new piers, aggregating 3,468 feet in length, of concrete on stone-filled cribs founded on piles, completed in 1901 at Duluth Canal; new piers aggregating 3,680 feet in length, of concrete on piles, completed in 1909 at Superior entry; converging breakwaters comprising 4,205 linear feet of rubble mound, 900 linear feet of stone-filled cribs and concrete superstructure pierheads founded on piles, and 896 linear feet of concrete shore revetments on pile foundations, completed in 1912. All piers and revetments are riprapped. Project depths are available in the harbor as shown by surveys completed in March 1945, except scattered shoals in Superior Harbor Basin, East Gate Basin, Superior Front Channel, Cross Channel, and Howards Bay. The entrance piers and breakwaters are all in fair condition. The total cost was $9,257,801.65, of which $6,857,290.52 was for new work and $2,400,511.13 for maintenance. The total expenditures were $9,255,129.46. Proposed operations.-The balance unexpended at the end of the fiscal year, $81,722.82, plus an additional amount anticipated. to be allotted, will be applied to maintenance as follows: Accounts payable Dredging with U. S. dipper dredge Gaillard, September to Breakwater repairs to main portions, Superior Entry break- $2, 672. 19 85,000.00 17,000.00 11, 000. 00 18, 050. 63 Total 133, 722. 82 Annual maintenance dredging for removal of shoals, maintenance repairs to breakwaters and piers and protection of United 672607-46-pt. 1, vol. 2-29 States buildings and property will be necessary. The additional sum of $163,000 can be profitably expended during fiscal year 1947 as follows: Dredging with U. S. dipper dredge Gaillard during the fall of 1946 and spring of 1947 Piers: Riprapping with U. S. derrick boat Coleman during summer of 1946 Breakwaters: Repairs to main portions with U. S. derrick boat $90,000 20,000 15, 000 Piers: Repairs to superstructure Duluth Canal Piers with hired labor during summer of 1946 Protective measures, guarding United States buildings and property Total 20,000 18,000 163, 000 Amount that can be profitably expended in fiscal year ending 163, 000.00 1 Exclusive of available funds. 8. PORT WING HARBOR, WIS. Location. The harbor is situated on the south shore of Lake Superior, 34 miles easterly from Duluth. (See U. S. Lake Survey Chart No. 96, Lake Superior.) Existing project. This provides for the construction of two parallel piers at the entrance 200 feet apart and 800 and 825 feet long, respectively, the piers to consist of two rows of piling filled in with slabs and topped with large rock; for the construction of a return pile revetment at the inner end of the east pier to preserve the sand spit from erosion; a pile revetment along the east bank; and for dredging a channel 150 feet wide with 15-foot depth between the piers and 500 feet along the pile revetment parallel to the spit. The project depth is referred to low-water datum for Lake Superior, which is 601.6 feet above mean tide at New York. The ordinary seasonal variation of water level extends from 0 to +1 foot above low-water datum. The harbor is subject to extreme fluctuations of water level of a temporary nature, due to wind and barometric conditions, of about 1 foot above or below the mean lake level prevailing at the time. The estimated cost for new work, revised in 1945, is $67,850. The latest (1918) approved estimate for annual maintenance is $2,000. The existing project was adopted by the River and Harbor Act of June 13, 1902 (H. Doc. No. 114, 56th Cong., 1st sess.). For latest published map see Annual Report for 1903, page 1810. Local cooperation.-Fully complied with. Terminal facilities.-There is one public wharf and one private wharf, both in poor condition. The terminal facilities are considered adequate for existing commerce, consisting of a few small fish boats. Operations and results during fiscal year.--Maintenance dredging was done during the fall of 1944 by Government plant and hired labor and a total of 13,420 cubic yards was removed. The costs were $11,025.47, all for maintenance. The expenditures were $11,217.05. Condition at end of fiscal year.-The existing project, which is about 70 percent complete, consists of two entrance piers, 800 and 825 feet long, completed in 1917; a pile revetment 45 feet long at the inner end of the east pier and perpendicular to it, completed in 1903; an entrance channel 150 feet wide in the lake approach and 100 feet wide in the harbor, extending from deep water in the lake to a distance of 200 feet inside of the inner end of the east pier, and a portion of the turning slip 150 feet wide and extending 200 feet east of the face of the east pier, dredged to a depth of 15 feet below low-water datum in 1911. The piers and revetment are in very poor condition due to decay, wear of ice, and settlement of the stone and slab filling. At the close of the fiscal year the controlling depth was 9.4 feet in the channel, 150 feet wide in the lake approach and 100 feet wide between the piers. To complete the project it would be necessary to widen the channel 50 feet between the piers and to extend the turning slip 300 feet and the revetment about 450 feet. The total costs were $119,813.68, of which $48,355.23 was for new work and $71,458.45 for maintenance. The total expenditures were $120,005.26. |