Feet. Cut on south side of black-oak stump, 200 feet northwest of the northwest cor- 31.943 Cut on south side of maple tree, 520 feet west of the main road, and 1,230 feet 34.055 23.344 65.840 Cut and spike on north side of northerly pine tree, about 60 feet northwest from town-house at Bissell's ferry 28.310 Cut on the south side of hickory tree, 210 feet northwest of the northwest corner of tobacco-shed in Charles Well's lot, East Windsor. Cut on the northwest side of a large hickory tree, about 900 feet northeast of Top of southwest corner of abutment of New York, New Haven and Hartford Top of southeast corner of abutment of New York, New Haven and Hartford Top of northeast corner of north end of capping to east wall of brick arch Southwest corner of stone in top course of west wall of the second culvert Apex of cap-stone to third post in wall north granite post marking bound- Southeast corner of top stone in upper course of east wall of culvert at the Northwest corner of stone underpinning of south side of south door in west end of passenger station in Springfield, Mass. Southeast corner of south end of top course of stone in culvert under railroad, first north of Hampden Park, and about 400 feet south of first mile-stone ou east side of Connecticut River Railroad.. Northeast corner of top stone of south wall of first culvert north of first crossroad, north of second mile-stone from Springfield, on east side of Connecticut River Railroad..... North corner of fourth mile-stone from Springfield, on Connecticut River Railroad 50.704 27.152 29.810 61.900 61.750 76.663 56.408 55.022 68. 104 63.231 61.786 71.337 60.617 67.130 67.639 North corner of sixth mile-stone from Springfield, on Connecticut River Railroad 70.287 Southwest corner of south abutment of Connecticut River Railroad bridge at 78.190 Point marked with white paint and "110" on southeast corner of foundation to south side of pump-house, near Holyoke dam, at the head of a flight of stone steps.... 107.975 Table of high-water marks. Low water at Hartford 1854-High-water mark, an iron pin in north side of maple tree about 600 feet west of main road, near S. B. Newburry's house, South Windsor.... 1854-High-water mark by Mrs. Craw, in house now owned by Mrs. Ellen Blodgett, near Bissell's ferry, South Windsor.. 1854-High-water mark by Mr. Seymour King, on sill of front door of his house, Windsor Locks. 1854-High-water mark at foot of canal, Windsor Locks.. 1854-High-water mark made by Mr. Levi Palmer in his barn, at Warehouse Point.... 00 29.83 21.00 32.56 32.82 33.31 32.73 Feet. 1857-High-water mark made by Mr. Levi Palmer in his barn, at Warehouse Point.... 33.18 1854-High-water mark made by Mr. Levi Palmer in his woodshed, at Ware house Point............. 32.82 1855-High-water mark made by Mr. Hayden at the silk-factory, Windsor Locks 32.71 31.42 1870-High-water mark on shed, by Mrs. Conroy, Windsor Locks. house Point.... 1854-High-water mark on outbuilding, by George Gleason, Warehouse Point. 1854-High-water mark in bar-room of American House, Warehouse Point. 1854-High-water mark on stone near Mr. Fowler's house, Windsor Locks. on south side of elm tree, on south bank of first brook south of Thomp- west side of brick culvert over brook from factories in Thompsonville, 1854-High-water mark on northeast corner of top brownstone post, corner of of top stone on the southwest corner of old east abutment of carriage 1862-High-water mark with red paint, on northwest corner of easterly abutment of railroad-bridge, Springfield.. 1869-High-water mark same place as above 32.38 32.06 32.88 30.55 32.92 31.12 30.84 32.12 2. 41. 45 49.41 54. 16 55.61 59.69 59.91 60.52 60.36 58.75 1854-High-water mark on merestone on west side of Main street, at northeast 61.29 Mrs. Beebe's house, on east side of Main street, West Springfield.... 1854-High-water mark on centre of front edge of top step of Dr. H. C. Bel 61.39 den's house, West Springfield 63.10 1854-High-water mark on stone at foot of Westfield street, West Springfield. 63.21 61.50 62.04 1854-High-water mark on south side of sycamore tree at south end of shed, north of Riverdale Mill, West Springfield 63.88 1862-High-water mark on nail in south side of brick foundation of R. A. Bagg's house, 1,000 feet south of cross-roads, on east side of Main street, West Springfield 62.96 1854-High-water mark on centre of white-paint mark on south side of first pier on east side of Cabot bridge, Chicopee... 62.99 1862-High-water mark same place as above.... 63.28 1862-High-water mark on northwest corner of brick foundation at Ames's Works, Chicopee..... 63.46 1854-High-water mark 14 inches above floor of room in house, formerly a 1868-High-water mark is the lower of the above-mentioned notches 1862-High-water mark inside of gate-house of Holyoke Dam, top of second List of maps, drawings, &c., accompanying the report. 1. Map of the Connecticut River from Hartford to Holyoke in six sheets. 2. Diagram of borings in the bed of the river. Feet. 67.21 66. 13 65. 21 70.55 110.60 3. Profile of the Connecticut River from Hartford to Holyoke, showing high and low water. 4. Diagram showing the cross-sections of the river at Thompsonville. 5. Three sheets of drawing of apparatus used in gauging. 6. Three sheets of plotted current-velocities taken at Thompsonville. 7. Diagram of mean vertical curves of current-velocities at Thompsonville. 8. Diagram showing the height of river at Hartford from February 1 to December 31, 1871. 9. Diagram showing the height of river at Hartford from January 1 to December 31, 1872. 10. Diagram showing the height of river at Hartford from January 1 to December 31, 1873. 11. Diagram showing the height of river at Hartford from January 1 to December 31, 1874. 12. Tracing for the purpose of placing the lines of gauging at Thompsonville upon the map transmitted with the first part of this report. 13. Three field-books are also transmitted, containing the notes of the levels, soundings, current-observations, and heights of water, taken at Thompsonville in 1874. 14. Diagram showing curve formed by using the computed volumes at Thompsonville as abscissas and the height of the water as ordinates. 15. Diagram showing two curves, both having the dates as abscissas, with the volumes as the co-ordinates of one curve, and height of the river as the ordinate of the other. DESCRIPTION OF FIGURES IN DIAGRAM OF VERTICAL CURVES OF CURRENT-VELOCITIES AT THOMPSONVILLE, CONN. Means obtained by computation. Fig. 1. Mean of meter-observations below average velocity of 1.86. Fig. 8. Mean of all float-observations. Fig. 9. Mean of all meter and float observations. Means obtained by graphic methods. Fig. 19. Mean curve by meter No. 1 on section at F, mean velocity being 1. THEO. G. ELLIS, The maps and drawings submitted with the foregoing report are mostly upon a large scale, unsuitable for printing. They have been, therefore, somewhat modified and reduced in size, to enable them to be shown in the accompanying plates. Of the maps and diagrams named in the foregoing list— No. 1 is reduced to about one-third of the original scale, and the six sheets are shown in plates Nos. I, II, and III. No. 2, reduced in size, is shown in Plate IV. No. 3, reduced in scale, is shown in Plate V. No. 4, reduced in scale, is shown in Plate VI. No. 5 is shown in Plate VII. No. 6 is omitted from the plates, as the ordinates of the current velocities are given in the tables, and can be easily plotted if desired. No. 7 is shown in Plate VI. No. 8 is shown to a reduced scale in Plate VIII. No. 11 is shown to a reduced scale in Plate XI. No. 12 is placed upon the general map, Plates I, II, and III. No. 13. These books are too voluminous to be reproduced. No. 14 is shown in Plate XIII. No. 15 is shown in Plate XIII. The description given for the diagram of vertical curves of current velocities at Thompsonville applies to the figures in Plate VI. ADDITIONAL TABLES OF HEIGHT AND DISCHARGE. The observations of the height of the river have been continued during the year since the foregoing report was made, and the following supplementary tables have been prepared, bringing the record of the discharge of the river up to January 1, 1876. During the years 1871 to 1874, inclusive, the height of the water was taken daily by means of a gauge at the toll-bridge from Hartford to East Hartford. The bridge company's gauge was upon the toll-house, and extended from 11 to 30 feet in height. The zero of this gauge, or 12 feet below the 12-foot mark, was taken as low-water and the base for the levels. A gauge from 0 to 12 feet was placed upon the first pier, opposite the bridge-gauge, and all heights below 12 feet were read upon it. Sometimes in winter it would be incased in ice, and, being in an exposed position, it was several times carried away by floating ice, but was carefully replaced at the same level. At such times the readings below 11 feet were taken by a gauge upon a pile at the steamboat-dock near the foot of State street, which was compared by levels with the tollbridge gauge. These levels were as follows: Eleven-foot mark on gauge on pile at steamboat-dock— By Mr. Gelette, in April, 1871 By Mr. Burdett, in March, 1874 By Mr. Curtis, in December, 1874 The distance between the two gauges is about 1,750 feet. 11. 191 11.205 11. 194 At the beginning of the year 1875 the gauge upon the pier was covered with ice, and in the spring it was carried away, so that the readings below 11 feet were taken at the steamboat-dock gauge up to August 10. The gauge upon the toll-house belonging to the bridge company having been taken down, painted, cut in two, and replaced in a slightly different position, it was determined to set a new gauge at the steamboatdock corresponding to the exact zero of the previous observations. This was done on August 10, a new gauge, consisting of three 10-foot lengths, being set up in the following manner: The first 10 feet was placed upon a pile at the north end of the steamboat-wharf, in a sheltered position where the next wharf above projects, so that the gauge faces downstream. The second 10 feet was placed upon a tall clump of piles east of the steamboat store-house, and the upper 10 feet was spiked to the north side of the store-house itself. The height of these gauges and the former one at the bridge is referred to the following bench-marks, so that either could be readily replaced at the same height: Top of an iron eyebolt let into the masonry of the northeast corner pier of the steamboat store-house; height above zero, 14.150 feet. Southeast corner of stone door-sill on south side of soap-factory building, No. 82 Morgan street; height above zero, 26.555 feet. Since August 10 the readings have all been taken upon the new gauge at the steamboat-wharf. Table showing the daily discharge and height of the Connecticut River at Hartford from January 1 to December 31, 1875. |