compartments. The settling compartments have a combined capacity of about 30,000 gallons and will therefore provide for an average detention of the sewage of about 3.5 hours when serving a population of 2,000, assuming a contribution of sewage of 100 gallons per capita per day.

The sludge compartments have a combined capacity of approximately 3,500 cubic feet, equal to 1.7 cubic feet per person, for the estimated future population to be served. Each of the 4 sludge-storage hoppers is to be provided with an 8-inch cast iron sludge pipe, by means of which the sludge may be removed by gravity flow to the proposed sludge-drying areas to be located in the two corners of the proposed sand filters adjacent to the settling tanks. Each hopper is to be provided with 2 rings of perforated water pipe 11⁄2 inches in diameter in order to facilitate the removal of sludge.

Dosing chamber

The clarified sewage from the settling tank will flow by gravity into the dosing chamber located adjacent to the settling tank. This dosing chamber is to be equipped with six 12-inch alternating discharge siphons, by means of which the sewage may be discharged intermittently into the various sand filters. Only 4 of the siphons will be put in operation at first. The dosing chamber has sufficient capacity to flood each of the 4 filters to a depth of about 1 inch, assuming that no sewage would seep through the sand during the time of discharge. The rate of application of the sewage to the sand filter will be equal to approximately 1 cubic foot per second for 500 square feet of sand filter area served.

Sand filters

The plans provide for the construction of 4 sand filters at first and provide for the construction of two additional filters when required in the future. These 4 filters, which have a combined area of 2.6 acres, have been designed to care for a population of approximately 1,300 persons. Additional filters should therefore be added whenever this population is exceeded. Each filter is to be filled to a depth of 3 feet with sand having an effective size of from .20 to 35 mm. and a uniformity coefficient not greater than 3. The distribuing systems are to consist of systems of troughs by means of which the sewage may be distributed over the entire area of the beds. The underdrain system of each bed is to consist of lines of 5-inch bell and spigot vitrified tile pipe spaced 20 feet apart center to center and discharging into a main 8-inch collecting drain laid through the center of the bed. Inspection manholes are to be installed at the upper ends of the main drains and manholes provided with sumps for the interception of sand are provided on the line of the main collecting drain leading to the chlorination plant.

Chlorination plant

The chlorination plant, which is to be covered by a small building, is to be situated on the line of the effluent pipe from the sand filters. This plant is to be equipped with duplicate chlorination apparatus for the application of liquid chlorine. According to specifications, each chlorine apparatus will be capable of applying from .05 to .5 of a pound of chlorine per hour or from 1.2 to 12 pounds per day. No statement is made, however, as to the number of parts per million of chlorine to be applied to the effluent from the sand filters. Not less than 5 parts of chlorine per million parts of sewage treated should be applied to the effluent from the sand filters at all times.

The chlorine is to be applied at the inlet of the chlorination tank. This tank has a capacity of about 5,000 gallons and will therefore give a time of detention of about 2 hour. The chlorination tank is to be baffled and should provide a proper mixing of the treated effluent.

From our careful examination of the plans, I am of the opinion that if the plans are properly carried out they should satisfactorily meet local and general requirements for sewage disposal, and I would therefore recommend that they be approved.

ALBANY, N. Y., March 14, 1917

Respectfully submitted,

THEODORE HORTON,

Chief Engineer

The plans were approved March 14, 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 at the Wingdale Prison, Wingdale, N. Y., submitted to this Department for approval by the State Architect on June 14, 1917.

Original plans and specifications for sewage disposal for this institution were approved on March 14, 1917, and reference is made to our report on these plans dated March 14, 1917, for a description of the institution and of the sewage disposal plant. The original plans were designed to care for an ultimate future population of 2,000 and provided for a sewage disposal plant consisting of a screen chamber, 2 settling tanks of the Imhoff type, a dosing tank with 6 12-inch alternating siphons, 6 intermittent sand filters, a chlorination plant and two sludge-drying beds for the disposal of sludge. This disposal plant was to have been constructed by the institution with convict labor.

According to the data submitted with the present plans, the ultimate capacity to be provided for at the prison will be 600, and the work of constructing the disposal plant is, with the exception of furnishing and placing of the sand-filtering material for the intermittent sand filters, to be done under contract. The plans now submitted comprise drawings Nos. 2008, 2009, 2010, 2011, 2012 and specification No. 2782.

The present plans show that the disposal plant is to be located at the same site as provided for by the original plans and that the plant is to be similar to the original plant, except that it will have a smaller capacity.

Sewage disposal

The disposal plant is to consist of a screen chamber, two settling tanks of the Imhoff type, a dosing tank provided with four 8-inch alternating discharge siphons, 4 intermittent sand filters, a chlorination plant and two sludge-drying areas.

Settling tanks

The proposed settling tanks will have a combined capacity of about 11,600 gallons and will therefore provide for an average detention of the sewage of about 4 hours when serving 600 persons, assuming a per capita rate of sewage contribution of 100 gallons per day. Each tank is to be provided with 4 8-inch sludge pipes controlled by 8-inch valves so arranged that the sludge may be withdrawn to the sludge-drying bed by gravity flow from either of the 4 sludge hoppers of the settling tank. Each of the sludge pipes have a number of sharp turns which might interfere somewhat with the flow of sludge through the sludge pipes and may cause residual sludge, which may remain in the pipe after the sludge is blown out, to become desposited and caked in the pipe unless means are provided for flushing out the sludge pipe after each discharge of the sludge. This could readily be obviated by connecting a water-pressure pipe with the sludge pipe at a point just back of and on the tank side of the valve on the sludge pipe or to extend a smaller riser pipe from this point to the ground surface, with hose connection arranged for.

Dosing tank

The dosing tank, which is to be provided with 4 8-inch alternating siphons, will have sufficient capacity to flood one of the sand filters to a depth of about 1 inch at each discharge of a siphon. The siphons will have an average rate of discharge of approximately 3 cubic feet per second, equal to about 1 cubic foot per second for 5,000 square feet of sand filter area dosed, and should therefore provide for a satisfactory distribution of the sewage over the surface of the sand filter.

Intermittent sand filters

The proposed sand filters are to be of the same design as originally planned and will have a combined area of 1.2 acres, thus providing for a rate of operation of not more than 50,000 gallons per acre per day. The filtering material is to consist of sand 3 feet deep. The specifications, however, do not specify the effective size nor the uniformity coefficient of the sand but state that the sand will be furnished and installed by the institution. According to the letter submitted by the State Architect with the plans, the sand will conform with the specifications for sand contained in the original specifications approved by this Department. This sand, as specified by the original specifications approved on March 14, 1917, was to have an effective size of not less than 0.20 mm. and not greater than 0.35 mm. and a uniformity coefficient not greater than 3.0.

Chlorination

The chlorination plant is to be provided with duplicate liquid chlorine sterilizing devices of the manually operated direct feed type. Each device is to be capable of applying chlorine at rates of from 1.2 pounds to 12 pounds per day. No statement is made, however, as to the number of parts per million which is to be applied, but it is assumed that 5 parts per million will be used to sterilize the effluent.

Conclusions and recommendations

From our careful examination of the plans, it is found that the proposed sewage disposal plant, if carefully constructed in accordance with the plans and if operated with care and efficiency, should satisfactorily meet the requirements for which it was designed and should produce an effluent that might be safely discharged without objection into the small stream on the institution property tributary to Swamp river.

I would therefore recommend that the plans be approved on condition that the sand to be used for filtering material in the intermittent sand filters shall conform with the sand specified by the original specifications approved on March 14, 1917, which provided that the sand should have an effective size of not less than 0.20 mm. and not greater than 0.35 mm. and a uniformity coefficient not greater than 3.0.

Respectfully submitted,

THEODORE HORTON,
Chief Engineer

ALBANY, N. Y., June 15, 1917

The amended plans were approved June 18, 1917.

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

I beg to submit the following report on our examination of the amended plans for sewage disposal for Wingdale prison, Wingdale, Dutchess county, submitted to this Department for approval by the State Architect, on Septem

ber 27, 1917. The original plans for sewage disposal were approved by this Department on March 14, 1917, and certain amendments were approved on June 18, 1917.

The amendment at present under consideration contemplates a slight change in the alignment of the 10-inch sewer leading to the diverting manhole at the screen chamber of the disposal plant. On the original plans this sewer follows a somewhat irregular course conforming to the topography of the ground. It is now proposed to carry the sewer in a straight line from manhole No. 10 to the diverting manhole, a distance of 864 feet, eliminating one manhole and slightly shortening the distance and increasing the grade of the sewer. The changes are indicated on drawing No. 2,033, which will replace drawing No. 2,012 of the set of plans for the sewage disposal plant, approved on June 18, 1917. No other changes from the design as approved on that date are proposed.

In view of the above, I would recommend that the amended plans for sewage disposal for the Wingdale prison, Wingdale, Dutchess county, be approved.

ALBANY, N.Y., October 1, 1917

Respectfully submitted,
THEODORE HORTON,
Chief Engineer

The amended plans were approved October 1, 1917.

YORKVILLE

Plans for certain sewer extensions to be constructed in Baylis, Russell, Hall and Bunker avenues, Fairview place and across the private right of way near the New York Central railroad in the village of Yorkville, Oneida county, N. Y., were submitted to this Department for approval on August 13, 1917. The plans were carefully examined by the Engineering Division of this Department and approved on August 22, 1917.

PERMIT

Application having been duly made to the State Commissioner of Health, as provided by section 77 of chapter 49 of the Laws of 1909, the "Public 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, village of Yorkville, to discharge sewage from the proposed sewer extensions in Baylis, Russell, Hall and Bunker avenues, Fairview place and across private right of way near the New York Central railroad into the waters of Mohawk river, within the municipality of Yorkville, in accordance with the plans accompanying the petition, under the following 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 only sanitary or domestic sewage and no storm water or surface water from streets, roofs or other areas shall be admitted to the proposed sewers.

4. That all of the sewage to be collected by the proposed sewers shall, before its discharge into the Mohawk river, be passed through the village sewage disposal plant.

August 22, 1917

M. NICOLL, JR.

Deputy State Commissioner of Health

Discharged into

INDIVIDUAL PERMITS ISSUED DURING 1917, UNDER SECTIONS 76 AND 78 OF CHAPTER 49 OF THE LAWS OF 1909,
THE PUBLIC HEALTH LAW, CONSTITUTING CHAPTER 45 OF THE CONSOLIDATED LAWS

LOCATION

To whom issued

Waste matter