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Rating Table for Sacandaga River at Wells, New York, from August 25, 1907, to December 31, 1907.

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The above table is applicable for open channel conditions. It is based upon nine discharge measurements made during 1907. It is well defined between gage heights 3.7 feet and 5.5 feet. The table has been extended beyond these limits. Above gage height 7.5 feet the rating curve is a tangent, the difference being 170 per tenth.

SACANDAGA RIVER AT NORTHVILLE, NEW YORK.

This station was established August 26, 1907, by H. K. Barrows. The gage is located about three-fourths of a mile upstream from the steel highway bridge at Northville. The drainage area at this point is 740 square miles.

The channel is straight for about 1,500 feet above the gage and for about 1,000 feet downstream. The right bank is fairly high and does not overflow except during extreme high water. The left bank is high and rocky and never overflows. Both banks are skirted with bushes and a few trees. The bed is of gravel, rocky and permanent. The current is good for medium and high stages, but becomes very sluggish during low water.

Discharge measurements are made from the upstream side of the highway bridge at Northville during medium and high stages, the initial point for soundings being vertically over the left abutment, upstream side. Velocity conditions here are similar to those at the gage. During low water, gagings are made by wading, about one-eighth of a mile above the staff gage.

A vertical staff gage read once daily by E. E. Parkes is bolted to the ledge on the left bank about three-quarters of a mile above Northville bridge. This gage is referred to a bench mark as follows: horizontal chisel draft marked "B. M." about 0.5 feet upstream from the gage, elevation 3.00 feet above gage datum.

A standard chain gage was established on November 6, 1907, fastened to a tree and post on the left bank, about 300 feet downstream from the staff gage. Length of chain 22.23 feet. This gage is referred to temporary bench marks not as yet connected with the gage datum of the staff gage, and was set to read the same as the staff gage.

SACANDAGA RIVER AT NORTHVILLE, NEW YORK.

Daily Discharge in Sec. Ft. of Sacandaga River at Northville, New York.

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(Drainage Area, 740 square miles.)

DAY.

Aug., 1907. Sept., 1907. Oct., 1907. Nov., 1907. Dec., 1907. Jan., 1908.

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a Gage height as observed at 9 a. m.-10 a. m. water over top of gage (i. e.) gage height 5.0, discharge approximated as corresponding to gage height 6.0.

b Water over top of gage-discharge approximated as corresponding to gage height 5.5.

c Water over top of gage- -gage height Oct. 28 taken as 6.0; Oct. 29 as 5.5.

d Water over top of gage-gage height Nov. 3 taken as 6.0; Nov. 4 as 5.5.

e Anchor ice accumulations downstream caused backwater on gage,-discharge assumed

Discharge Measurements of Sacandaga River at Northville, New York, in 1907.

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a Gaging made by wading, about mile above staff gage.

b River rose 1.02 feet during gaging-results approximate only.

c Gaging by surface floats near Northville bridge.

d River frozen and gorged with anchor ice from a point about mile upstream from gage to dam about 2 miles downstream. Gage height is to water surface but is not a true index of flow, gage height to top of ice-7.33, about; ice about 0.2 feet thick. Gaging made from highway bridge at Northville-considerable needle and anchor ice-results a pproximate only

Rating Table for Sacandaga River at Northville, New York. 24, 1907, to December 31, 1907.

From August

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The preceding table is applicable only for open channel conditions. It is based upon eleven discharge measurements made during 1907. It is well defined between gage heights 0.8 feet and 3.0 feet and fairly well defined from 3.0 feet to 6.0 feet. The table has been extended beyond these limits. Above gage height 7.20 feet the rating curve is a tangent, the difference being 340 per tenth.

SACANDAGA RIVER NEAR HADLEY, NEW YORK.

This station was established September 13, 1907, by H. K. Barrows. It is located on the steel highway bridge about two and one-half miles west of Hadley (where the Sacandaga river enters the Hudson), between the towns of Corinth and Hadley. The drainage area at this point is 1,050 square miles.

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The channel is straight for about 500 feet upstream from the bridge and for perhaps 100 feet downstream, where it curves gently to the left. The banks are high, rocky and permanent and do not overflow. The bed is rocky and very rough. The current is good at very low stages, and very strong at medium and high stages.

Discharge measurements are made by the use of a boat at a section about one mile downstream, where a good gravel section is found and smooth flow. At high stages measurements are made from the highway bridge at Hadley, just below the railroad bridge at that point. Measurements are not made at the bridge to which the gage is attached.

A standard chain gage which is read twice daily by W. W. Jeffers, is attached to the hand rail of the bridge in the left span near the center pier, downstream side. Length of chain 25.35 feet. The gage is referred to bench marks as follows; (1) circular chisel draft on highest point of boulder 3x5 feet, about fifty feet from down stream side of bridge hear right abutment, elevation 6.50 feet; (2) chisel draft on downstream corner of right abutment at top, elevation 19.36 feet. All elevations refer to gage datum.

SACANDAGA RIVER AT HADLEY, NEW YORK.

Daily Discharge in sec. ft. of Sacandaga River at Hadley, New York. (Drainage area, 1,050 square miles.)

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a River frozen over-anchor ice and back water-discharge assumed as 1,000.

SACANDAGA RIVER AT HADLEY, NEW YORK.

Discharge Measurements of Sacandaga River at Hadley, New York in 1907.

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a Gaging by wading about 3,000 feet upstream from gage.

b Gagings made from bridge at gage-very rough-approximate only.

c Gagings Oct. 5 to Nov. 19 inclusive, made about one mile down stream from gage from a boat.

d Gaging made from highway bridge, just down stream from railroad bridge at Hadley.

Rating Table for Sacandaga River at Hadley, New York. 13, 1907, to December 31, 1907.

From September

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The above table is applicable only for open channel conditions. It is based upon ten discharge measurements made during 1907. It is fairly well defined between gage heights 1.0 feet and 3.0 feet and is only approximate above gate height 3.0. Above gage height 4.5 feet the rating curve is a tangent, the difference being 950 per tenth.

HUDSON RIVER AT NORTH CREEK, NEW YORK.

This station was established September 21, 1907, by W. G. Hoyt, at the steel highway bridge at North creek. The drainage area at this point is 804 square miles. North creek, a small tributary of the Hudson, enters from

the right a short distance below this point.

The channel is straight for about 500 feet upstream and some 300 feet downstream curving to the left below here. The banks are high and rocky, clear up to the high water line and not liable to overflow. The bed is rocky

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