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Health Law " as amended by chapter 553 of the Laws of 1911, constituting chapter 45 of the Consolidated Laws, permission is hereby given to the Board of Trustees of the village of Altamont to discharge effluent from the sewage disposal works of the village amended plans for which have this day been approved, into the waters of the Bozen Kill at the point of discharge shown by the plans within the town of Guilderland in accordance with the plans accompanying the petition, uilder the foilowing conditions: 1. That this permit shall be revocable at any time or subject to modification or change when in the judgment of the State Commissioner of Health such revocation, modification or change shall become necessary. 2. That the issuance of this permit shall not be deemed to affect in any way action by this Department on any future application that may be made for permission to discharge additional sewage or effluent into the waters of this State. 3. That both the sewers and sewage disposal works shown by plans approved this day shall be fully constructed in complete conformity with such plans and approved amendments thereof except as hereinafter provided. 4. That only sanitary sewage and no storm or surface water from streets, roofs or other areas shall be admitted to the proposed sewers and sewage disposal works. 5. That no sewage scum or sludge from any part of the disposal works shall be discharged into the Bozen Kill or any other watercourse. 6. That if at any time in the future the spring near the proposed sewage disposal plant is used as a source of water supply for the village, the tile sewer for 100 feet each side of such spring shall first be replaced by a sewer of cast-iron pipe laid with lead joints. 7. That whenever found necessary by the State Commissioner of Health an adequate drain provided with flap valves shall be constructed through the embankment surrounding the disposal works. 8. That whenever required by the State Commissioner of Health the sewers on Main street shall be reconstructed in such a manner as to provide straight alignments between manholes. 9. That aprons shall be provided on the sludge bed at the point of discharge of the sludge drain. 10. That the size of the siphon in the dosing chamber shall be increased to not less than 6 inches. 11. That the chlorinating apparatus installed shall have sufficient capacity to allow the application of chlorine at the rate of 15 pounds per day and that chlorine shall be at all times properly applied to the effluent from the plant at the rate of not less than 10 parts of available chlorine per million parts of sewage effluent. 12. That the sewage disposal works shall be so constructed that the floor of the filter shall be above extreme high water level. 13. That additional units of the sewage disposal works comprised by settling tank, sprinkling filters, final settling tanks and chlorination apparatus shall be constructed in accordance with plans satisfactory to this Department and put in operation each time the flow of sewage reaching the plant is increased materially above that contributed by 600 persons. M. NICOLL, JR., Deputy State Commissioner of Health October 5, 1917

HERMANN M. BIGGs, M.D., State Commissioner of Health:

I beg to submit the following report on our examination of amended plans for sewage disposal for the village of Altamont, Albany County, N. Y., submitted to this Department for approval by the Village Engineer on behalf of the Trustees of the Village on October 29, 1917.

The original plans for this sewage disposal plant were approved by this Department on October 5, 1917, and a report covering the matter was submitted to you under date of September 5, 1917.

A permit for the discharge of sewage from the disposal plant into the waters of the Bozen Kill was issued to the Village Trustees under date of October 5, 1917, and contained in addition to the usual revocation and modification clauses the following conditions:

1. That both the sewers and sewage disposal works shown by plans approved this day shall be fully constructed in complete conformity with such plans and approved amendments thereof except as hereinafter provided. 2. That only sanitary sewage and no storm or surface water from streets, roofs or other areas shall be admitted to the proposed sewers and sewage disposal works. 3. That no sewage scum or sludge from any part of the disposal works shall be discharged into the Bozen Kill or any other watercourse. 4. That if at any time in the future the spring near the proposed sewage disposal plant is used as a source of water supply for the village, the tile sewer for 100 feet each side of such spring shall first be replaced by a sewer of cast-iron pipe laid with lead joints. 5. That whenever found necessary by the State Commissioner of Health an adequate drain provided with flap valves shall be constructed through the embankment surrounding the disposal works. 6. That whenever required by the State Commissioner of Health the sewers on Main street shall be reconstructed in such a manner as to provide straight alignments between manholes. 7. That aprons shall be provided on the sludge bed at the point of discharge of the sludge drain. 8. That the size of the siphon in the dosing chamber shall be increased to not less than 6 inches. 9. That the chlorinating apparatus installed shall have sufficient capacity to allow the application of chlorine at the rate of 15 pounds per day and that chlorine shall be at all times properly applied to the effluent from the plant at the rate of not less than 10 parts of available chlorine per million parts of sewage effluent. 10. That the sewage disposal works shall be so constructed that the floor of the filter shall be above extreme high water level. 11. That additional units of the sewage disposal works comprised by settling tank, sprinkling filters, final settling tanks and chlorination apparatus shall be constructed in accordance with plans satisfactory to this Department and put in operation each time the flow of sewage reaching the plant is increased materially above that contributed by 600 persons.

The amended plans contemplate only the relocation of the plant on higher ground about 400 feet southeast of the original location. No change is made in the size or form of the tanks or beds, nor in the relative position or elevation of any tank, bed or appurtenance connected with the disposal works. The elevation of the plant as relocated will be approximately 30 feet higher than originally planned. This will place all parts of the plant well above extreme high water, and do away with all danger of water backing into any part of the works and interfering with the operation of the plant. At the new location the plant will be surrounded by a high bank as at the old site, and some means of draining this enclosure should be provided. The raising of the elevation of the plant of course decreases the grade of the trunk sewer connecting the street sewers at Indian Ladder Road and Main street to the inlet of the sedimentation tank. The new grade to this 12-inch line will be 0.25 per cent. which is sufficient, if the line is properly laid, to provide a satisfactory self-cleansing velocity and sufficient capacity to care for the needs of the village for a reasonable future period. In view of the results of our examination of these amended plans and after careful consideration of the essential features of the design and local requirements, I beg to recommend that the plans be approved. No permit for the discharge of effluent from this plant into the waters of the State is necessary as the changes contemplated by the amendments affect only the location of the plant, and not the method of treatment or the quantity of sewage discharged. The permit issued to the Trustees of the Village of Altamont under date of October 5, 1917, for the discharge of the effluent from the sewage disposal works of the village into the waters of the Bozen Kill in the town of Guilderland applies to the discharge of effluent from this plant.

Respectfully submitted,

THEODORE HORTON, ALBANY, N. Y., October 31, 1917 Chief Engineer

The revised plans were approved November 1, 1917.

AMHERST (Sewer District No. 1)

LINSLY R. WILLIAMS, M.D., Acting State Commissioner of Health :

I beg to submit the following report on our examination of revised plans for sewerage and sewage disposal for Sewer District No. 1, town of Amherst, Erie county, resubmitted to this Department for approval by the engineer for the district on February 3, 1917. Application from the Town Board asking for the approval of plans was submitted under date of May 9, 1916.

The records of the Department show that original plans for sewerage and sewage disposal for a portion of this district including an area of about 2 square miles situated in the southwestern portion of the Town of Amherst adjacent to the city of Buffalo were first submitted for approval on May 27, 1916. These plans provided for a comprehensive sanitary sewer system and for a sewage disposal plant comprising a pumping station, Imhoff tank, sprinkling filter and sludge drying bed to be located near Black creek, a small tributary of Ellicott creek.

After a careful examination of these plans by the Engineering Division a report was submitted to Commissioner Biggs under date of July 19, 1916, setting forth the results of the examination and making recommendations for certain modifications and additions to the plans before their final acceptance. The plans were accordingly returned to the designing engineer on July 19, 1916, with the recommendation that they be revised in the following respects:

1. That the slopes of the 8-inch sewers be not less than .35 per cent and that the slope of the 10-inch sewers be not less than .25 per cent. 2. That the design of the settling tank be so changed as to provide for a slope of the bottom of the sludge compartment of not less than 1 on 2, and that the location of the sludge pipe be shown on the cross sections. 3. That the effluent pipe be extended to Ellicott creek. 4. That the disposal plant be so designed as to permit of installing final settling tanks in the future if necessary. 5. The pumping station and equipment be shown in detail and that duplicate power and pumping equipment of sufficient capacity to care for the maximum flow of sewage with one unit in reserve be provided. 6. That the walls and partitions of the tank be carried up to an elevation of 2 and preferably 3 feet above the flow line of the tank. 7. That full details and dimensions of settling tank be shown. 8. That the size of the dosing siphon in the dosing tank be shown. 9. That a valve be placed at the upper end of each main distributor of the sprinkling filter. 10. That the set of plans for filing in this office be on print cloth.

On December 26, 1916, revised plans for sewerage and sewage disposal for sewer district No. 1 of the town of Amherst covering not only the area provided for by the original plans but so extended on the north and west as to include a total area of about 7 square miles were submitted. Although these plans had been designed in general accordance with the requirements referred to above they were lacking in details and were returned for revision on January 15, 1917, after a conference with the designing engineer in this office. As noted above revised plans were resubmitted for approval on February 3, 1917. According to the report of the designing engineer submitted with the plans the present population of the sewer district is about 750. The ultimate future population is estimated by the engineer at from 25,000 to 30,000. Based on an average population of 10 persons per acre, which is possibly somewhat high owing to the large size lots in a large portion of the sewer district, the probably ultimate population that will be tributary to the sewer system within the sewer district will be about 40,000.

Sewer system

The proposed sewer system which has been designed on the separate plan covers practically all the present streets and highways in the sewer district. The sewers vary in size from 8 to 36 inches in diameter and are designed with slopes sufficiently steep to provide self-cleansing velocities in them when flowing full and half full. Manholes are to be provided at the upper ends of all sewers, at the intersection of sewers, at all points of change of slope and alignment and at intermediate points on straight alignments not more than about 400 feet apart on small size sewers. On the large 36-inch outfall sewer the spacing between adjacent manholes in one or two cases exceeds 800 feet.

The lower portion of the main outfall sewer, consisting of 33-inch and 36-inch pipe appears to have been somewhat over designed with respect to necessary capacities. If desired a reduction of the size of this sewer to 30-inch and 33-inch respectively would still provide for sewage contribution from 40,000 persons in the district on the basis of 250 gallons per capita daily with the sewer flowing full, which is a permissible basis of design for a main trunk sewer under the conditions obtaining with respect to probable development of the district.

The proposed sewers have been designed to care for the probable ultimate future population within the sewer district and are, therefore, much larger than necessary to care for the flow that will obtain in the immediate future. There will be a tendency, therefore, for the large size sewers to silt up after they are first constructed due to the small contribution of sewage and the consequent low depth of flow and the sewers will have to be cleaned at regular intervals until sufficient sewage is tributary to them to provide for selfcleansing velocities in the sewers. This, however, is not a serious objection and one that cannot well be avoided.

Pumping

The plans provided for two pumping stations, one near the intersection of Albion avenue and Eggert road marked Pumping Station No. 1, and the other at the disposal plant marked Pumping Station No. 2. According to the plans practically all of the sewage of the sewer district west of Eggert road including approximately 14 of the entire sewer district is to be conveyed by gravity flow to Pumping Station No. 1 at which it will be pumped against a head of about 22 feet into the manhole on the main outfall sewer. It would appear from the plans that the pumping of the sewage from the greater portion of this area could be avoided by the construction of a high level intercepting sewer extending from the westerly line of the sewer district through private property approximately on line with Fremont street. This, however, would require the securing of additional rights of way through private property. At Pumping Station No. 2 it is proposed to pump the entire sewage of the sewer district against a head of about 40 feet into the settling tank of the disposal plant. Here again it would appear that the sewer system could be so modified or the disposal plant so located as to permit of conveying the sewage from the greater portion of the sewer district by gravity flow to and through the disposal plant by the construction of a high level intercepting Sewer, and possibly an inverted siphon. The design, therefore, does not appear to be economical in this respect inasmuch as it provides for the pumping of the entire sewage once and the sewage from about 14 the area twice but it is realized that there may be other factors than first cost which have Influenced the design such as, possibly, difficulty in securing rights of way.

Pumping station no. I

This pumping station which is to be located near the intersection of Albion avenue and Eggert road is to be provided with a pumping equipment consisting of two 3-1nch centrifugal pumps located in separate pump wells and having a capacity of 200 gallons per minute each. One of the pumps is to be driven by means of a 5 horsepower electric motor which is presum:ably to be operated automatically and the other pump to be operated by a gasoline engine. The pumps are to be protected by an inclined bar screen composed of 2 foot by %-inch bars spaced 1 inch in the clear. The combined capacity of the 2 pumps will be about 576,000 gallons per day and should, therefore, be of adequate capacity to care for the sewage from this area for a considerable period in the future. It will, however, ultimately be necessary to increase the capacity of the pumping equipment at this pumping station unless the sewage from the high level portion of this district is intercepted and conveyed to the disposal plant by gravity inasmuch as the probable maximum future rate of flow tributary to this portion of the sewer district may exceed 1,500,000 gallons per day.

Pumping station no. 2

This pumping station is of similar design to pumping station No. 1, except that it is to be equipped with 2 4-inch centrifugal pumps having a capacity of 400 gallons per minute each or twice the capacity of the pumps at pumping station No. 1. The capacity of the pumping equipment of this pumping station will also have to be increased before the sewer district is fully developed unless the design be so modified as to provide for the conveyance of the sewage of a portion of the district to the settling tank by gravity flow.

Sewage disposal

It is proposed to treat the sewage from this sewer district in a sewage disposal plant consisting of an Imhoff tank, sprinkling filter and sludge drying bed to be located on the westerly side of Ellicott creek in the northeastern section of the district. The disposal plant to be constructed at first is designed to care for a population of 1,000 persons and the plans provide for a duplication of the proposed plant or for a total of 2,000 persons. Ellicott creek at this point has a drainage area of approximately 80 square miles. It discharges into Tonawanda creek, a few hundred feet above the point where Tonawanda creek empties into the Niagara river. Ellicott creek below this point is not used as a source of public water supply.

An inspection of the disposal plant site was made by a representative of this Department on June 13, 1917. This inspection showed that the disposal plant site appeared to be well selected. It was found that one house is located about 500 feet southerly from the plant but that there are no houses within 34 of a mile in the direction of the prevailing wind which is southwesterly in this locality.

Settling tank

The proposed settling tank is of the two-story Imhoff type and is to be divided by means of concrete partitions into one upper settling compartment and two lower hopper shaped sludge compartments. It is to be 26 feet long and 14 feet wide and 25% feet deep inside dimensions with a maximum depth below the flow line of 2314 feet. Provisions are made for the reversal of flow through the tank. The settling compartment has a capacity of about 17,500

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