In designing the system it has been divided into three districts, designated on the plans as A, B and C.

District A, on the north bank of the Grasse river, has a popu lation of approximately 500, and the main sewers are designed for an estimated population of 10,000. The outlet for this district is through a 12-inch pipe, and it discharges into the Grasse river below the upper dam.

District B, on the south bank of the Grasse river, has a popu lation of approximately 1000, and the main sewers are designed for an estimated population of 12,000, for in this district, on account of the large population and more rapid growth, the outlet has been carried to a point below the lower dam, where it discharges into the Grasse river through an 18-inch pipe.

District C, on the north bank of the Raquette river, has a population of approximately 300, and the main sewers are designed for an estimated population of 8000. The outlet for this district is into the Raquette river through a 15-inch pipe.

No system has been designed for that section of the village situated south of the Raquette river, as there seems to be no immediate demand for sewers, it having a comparatively small population; and as it would call for a separate outlet, it did not seem necessary to include it in this plan.

Sewers have not been shown on certain proposed streets in Districts B and C, as there is some uncertainty regarding their final location.

All lateral sewers are designed for an estimated population of 30 to an acre, and all sewers to dispose of 30 cubic feet per person in 24 hours.

The sewers are intended for house sewage only, all roof and ground water being excluded.

Very truly yours

W. F. BATES

SAG HARBOR, N. Y.

Amended plans

Plans providing for a change of location of the outlet of the system from that shown on the plans originally approved by this Board were approved February 14, 1900, with the understanding that in case disposal works are later deemed necessary, the original plan or another equally satisfactory to the State Board of Health will be demanded.

MOUNT VERNON, N. Y.

Change of plans

On February 14, 1900, plans were approved for a temporary change of the outlet sewer of the Vernon Park district so as to discharge the sewage into Eastchester creek, temporarily, by a shorter route than was originally planned and approved.

CANAJOHARIE, N. Y.

Separate sewer system

Plans for a separate sewer system and disposal works were approved by this Board February 14, 1900.

The plans provide for the purification of the sewage during the dry months by means of a septic tank. At other times, or when the flow of water in the Mohawk river is of sufficient volume

to accommodate the sewage without becoming dangerously polluted, the sewage is to be discharged through two separate outlets directly into the river.

The report of F. E. Crane, C. E., which accompanied the plans, is hereto appended, together with the report of Wm. B. Landreth, C. E., concerning the disposal works.

REPORT

AMSTERDAM, N. Y., July 21, 1899

To the Trustees of the village of Canajoharie, N. Y.:

The village of Canajoharie lies on the south bank of the Mohawk river, contains about 2500 inhabitants and covers an area of about one and one-half square miles. It is about equally divided by Bowmans creek. With the exception of the river flats, the slope of the ground is generally steep towards the river and towards the creek, rising to an elevation of 250 feet above the river within. the village limits. The alluvial soil of the river flats terminates abruptly in slate and limestone rock on the slope of the hills.

The present drainage of the village is partially provided for by a state drain from Church street to the creek and a few other drains, whose discharges and all surface run-off reach the river through the creek or two state culverts under the canal, located one easterly about three-eighths of a mile and one westerly about one-half of a mile from the creek.

Owing to the generally steep grades causing a ready discharge of surface water to these three outlets and the large amount of rock to be encountered in the excavation, a modified separate system of sewers was at once proposed and is recommended. As separate sewers I have assumed 100 gallons of sewage per capita' discharged in 12 hours, and six persons per lot of 50 feet frontage. The sewers are also designed to carry off a part at least of the roof water. Along all the outlying streets I have allowed for one house 50 feet by 20 on each lot of 50 feet frontage and onehalf inch rain per hour. In the center of the village I have allowed for one such building on each 25-foot lot and one inch

of rain per hour. I consider this increase in the centrally located streets necessary, because in recent years business and other blocks are designed with roofs sloping towards the central portion of the building in such a manner as to force all the rain water into the conductors. The introduction of rain-water from the roofs into the sewers having such steep grades as many of yours will have will serve, I believe, to keep such sewers in good condition without flush tanks. An inspection pipe has been placed at each dead end so that when your village has been supplied with hydrant water the sewers may be washed out, if desired, by the use of hose. In other places flush tanks are shown as a part of the plan, but no provision for water need be considered at present, as the demand for water will probably cause a system to be built before these outlying sewers are constructed. At a few points, as at the ends of the Front street and Cliff street lines, special means of supplying the flush tanks should be considered as soon as these lines are constructed. The tanks are designed to have a capacity of 200 gallons.

The drawings show a Miller automatic siphon in place, this being the modern pattern of the flush tank that has given the best satisfaction among those with which I have had experience, although there are several other makes that operate on the same principle and differ only in the form of the pipe releasing the air or discharging the water.

The two portions of the village on each side of the creek can be sewered respectively to two points marked "Outlet No. 1" and "Outlet No. 2." Whenever it may become necessary to bring the sewage to one point for treatment before discharging into the river, a 10-inch iron pipe may be laid as an inverted siphon across the creek just above the Main street bridge, which pipe will be sufficient to carry all the sewage from the east side of the creek over to West Main street, thence along West Main street to Outlet No. 1, Outlet No. 2 remaining a rain-water overflow for that district.

For the sewerage of Pearl street and the few adjacent streets between the river and the canal I have shown a separate outlet,

although these streets can be connected with Outlet No. 1 by a long line across the flats from Market street, there being three feet fall.

Following the instructions of your Board, I have made an estimate of the cost of the entire sewer system for all the streets within the village limits, and find that for the 41,000 lineal feet required the cost would be $39,000. But this includes some long expensive lines that would not be considered for several years to come. To construct Outlet No. 1 and about 15,000 feet of sewers on your principal streets would cost about $19,000, and would probably meet your present need. To do this it would be necessary to put in the 10-inch iron pipe across the creek and to make a temporary overflow into the creek for heavy storms. This overflow would come into use so seldom and at times when the creek is high that I believe it would cause no annoyance.

With this report I submit:

(1) Map of the village, showing the sizes and location of sewers and the location of structures.

(2) A sheet of the profiles of the streets, showing the present surface of the ground in black; the grade of the sewer in red lines; the elevation of points of change of grade in red figures, and the fall per 100 feet in red figures followed by the symbol . (3) Drawings of a manhole, flush tank inspection pipe and outlet manhole.

(4) Tracings, which are copies of all the above plans.

(5) Specifications in duplicate, including blank forms of proposals, contract and bonds.

F. E. CRANE, C. E.

CORTLAND, N. Y., November 1, 1899

F. E. CRANE, Civil Engineer, Amsterdam, N. Y.:

Dear Sir-In accordance with your request of a recent date, I have examined the plans for the sewerage of the village of Canajoharie, N. Y., made by you. I have visited that village and walked over the line of the proposed outlet sewer known as "Outlet A," and I submit the following report regarding a suit