WHITESBORO, N. Y.

Separate sewer system

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

The plans provide for the collection of the sewage by gravity at one point on the southerly side of the N. Y. C. & H. R. R. R. tracks near the center of the village from whence it will flow through a 20-inch pipe 1340 feet to its final outlet in the Mohawk river. The disposal works are located about midway of the lastnamed distance, but as in the case of numerous other places in the Mohawk valley, it is not deemed necessary to do more than plan for such works at present, leaving their construction until such times as they may be rendered more imperatively necessary. The system is designed to carry part of the roof or storm drainage of Main street. The engineer's report follows:

ROME, N. Y., October 20, 1900

The President and Board of Trustees, Whitesboro, N. Y.:

Gentlemen-We herewith submit plans and specifications for a complete system of sewerage for the village of Whitesboro.

The plans consist of a general map of the entire village on a scale of 200 feet to the inch, profiles of all the streets, and a sheet of details. The general map shows all the streets of the village with contour lines referred to tide-water, all sewers with their sizes, direction of flow of sewage, grades, manholes, lampholes, flush tanks and catch-basins. The elevation of the sewer invert is shown at all important points and changes of grade. The profiles show all the streets of the village with the ground line and depth of the sewer invert, and all sewers with their sizes, rates of grade and the location of manholes, lampholes, flush tanks, etc. The elevation of the sewer invert is shown at least at every point of change of grade. The detail plans show all the

constructions required to be detailed, such as manholes, lampholes, etc., not clearly described by the specifications. The specifications describe and detail the requirements, condition and method of construction of the entire system.

A quantity sheet also accompanies the plans, giving the estimated quantities of work and material required on the construction of the entire system in accordance with the specifications. The following report gives the data upon which the system was designed and the reasons therefor:

REPORT

The village of Whitesboro is situated south of the Mohawk river and on both sides of the Erie canal. Its boundary on the east is Sauquoit creek. The village as incorporated covers about one square mile, and has an estimated population of nearly 2000 people. The national census of 1880 gives a population of 1370, and that of 1890, 1663. The principal industries are knitting, furniture and lumber. As a suburb of Utica the village is likely to have a continued growth and prosperity.

The village has a water-works system completed about a year ago.

The northerly line of the village corporation lies along the north side of the right of way of the N. Y. C. & H. R. R. R. The Mohawk river bends in south close to the western end of the village, and on its course to the east flows by a winding course but generally away from the northerly corporation line, so that opposite a point near the center of the village the river at its nearest point is about one-quarter of a mile north of the corporation.

An inspection of profiles of Main street, which extends east and west the entire length of the corporation, taken in connection with the elevation of the water surface of the Mohawk river, will show the impracticability of carrying the sewage by gravity from either end of Main street to the other. We have hence designed the system with a single outlet in the Mohawk river at the point mentioned above about one-quarter of a mile from the northerly line of the village corporation. The desirability of uniting the flow of

sewage into one outlet for the purpose of increasing the flow in the sewer mains, and also for the future collection of sewage at one point for the possible treatment is self-evident. We have hence planned the system so that by means of an intercepting sewer along the southerly line of the N. Y. C. & H. R. R. R. all the sewage is brought to a point about midway between Pleasant street and Dewey avenue and there emptied into the main sewer, 20 inches in diameter, and carried through it to the Mohawk river past the proposed location for future treatment works should treatment of the sewage be later required by the state. The system as planned is not intended for the carriage of surface water except upon portions of Main street. That part of the village lying to the south of the Erie canal is readily cared for by the topography of the land for direct or nearly direct carriage into the Erie canal. This portion of the village has already a nearly complete system of surface drainage by means of the street gutters and some storm sewers. These sewers, together with those that exist in other portions of the village, are shown upon the general map as closely as their localities could be obtained. That part of Main street, between Dewey avenue and Gardner street, is at present largely uncared for by storm sewers or good street drainage, and at seasons of the year much inconvenience is suffered by reason of no means of ridding the street of the water formed by rains and melting snow; consequently we have considered it best to so design the system as to carry away a reasonable amount of this surface water and have planned the system for the construction and use of 17 catch-basins along Main street. Main street for the major portion of the distance covered by these catch-basins is a summit street and hence the amount of water coming to these catch-basins would not be much and should be kept to a minimum as much as possible by proper drainage of the streets running north and south from Main street. It is recommended and expected that this be done, and also that the existing storm sewers be put and kept in a proper working condition.

A considerable quantity of 6-inch pipe is contemplated in the system. It is only used where extensions are hardly possible and the amount of sewage is and always will be small. Experience has convinced us that when laid with care stoppages occur with very little more, if any, frequency in 6-inch than in 8-inch pipe. The table below gives the minimum capacities in gallons for 24 hours and grades in per cent for the various sizes of pipe contemplated, and also states where the minimum capacity occurs. For intermediate grades it may be stated that doubling the grade increases the carrying capacity approximately 50 per

For the minimum rates of grade as designed the velocity of the sewage when the sewers are running one-third full will be over two feet per second.

The use of 24 flush tanks is contemplated for the system. They empty automatically and are for, the special purpose of flushing the smaller sizes of pipe. The admission of roof water into the sewers is not contemplated, but might be allowed in a few places for flushing the upper ends of the system until such times as the use of those sewers would render unnecessary the admission of the roof water. Any permit to connect the roof with the system should contain a clause giving the village the right at any future time to require the connection to be severed. The admission of roof water might be especially desirable for a time at the upper ends of the system.

The system as designed contemplates sewers on all streets of the village. The streets called Davis avenue and Jones avenue are private streets and not yet tendered to the village or opened to the public. The system as designed will, however, care for