the district, including the care of the two reservoirs and the operation of the two pumping stations and the condensers located there, for the purpose of supplying water to the Army at Culebra, Empire, and Las Cascadas, and also for the purpose of furnishing water to the dredging division for their operations in Gaillard Cut.

The increased operations at Paraiso made it necessary during the year to put in an additional pipe line for supplying water from the purification plant at Miraflores to Paraiso. This called for the installation of approximately 5,000 feet of 6-inch pipe, and also one additional pump.

After the completion of the purification plant at Miraflores the temporary pumping station at Miraflores and the old pumping station and pressure filter plant at Ancon were abandoned and removed, and all water for the southern end of The Panama Canal is now furnished by the Miraflores plant.

The report of operations of all pumping stations in the southern district is as given by the following statement:

In accordance with the terms of an official circular of the Governor, the care and maintenance and operation of all water distribution and water-supply systems on the Zone was transferred to the municipal division on September 1, 1914. This included the water-supply systems of the Panama Railroad Company at Monte Lirio and at Frijoles and certain other water-distribution systems of the Panama Railroad and of other divisions of The Panama Canal. By this same circular rates were established for the sale of fresh water to steamers and the municipal division was given charge of the sale of this water over the docks.

The following is a statement of the quantity of water sold to steamers by the municipal division during the fiscal year:

In the city of Panama the usual maintenance work was performed by the municipal division on the water and sewer system and the pavements. The work of maintenance and operation in the city included the installation of water meters on new connecnections and the repair and maintenance of all water meters installed on private connections and the preparation and collection of water-rent bills for water con

sumed.

A statement of the water-rent bills rendered during the year is given in the following table:

The brick pavement on the Caledonia bridge was renewed during the year, the cost of this being charged to the Panama Railroad Company. All other repair work on the streets and on the water and sewer systems, including replacement, was charged to the Panama Government, payment for same being made from the quarterly water-rent collections in accordance with the agreement with the Republic of Panama. All plumbing inspection work in the city of Panama, as well as the inspection of plumbing in the Canal Zone was handled by employees of this division.

A summary of the more important items of construction work performed by this division in the southern district during the year follows:

CANAL WORK.

New Panama waterworks.—The work on the new Panama waterworks was completed during the fiscal year. The supply line being Gamboa and Miraflores which was installed during the year included a total of 59,762 linear feet of cast-iron pipe, the cost of the installation being as shown by the following table:

The cost of the construction of pump stations Nos. 1, 2, and 3 and of the abandoned pump station, with the equipment installed in stations Nos. 1, 2, and 3, is given in the following table:

1 The abandoning of the original pump station No. 1 at Miraflores was due to the heavy rise in chlorine in the Miraflores Lake water, as explained in detail in the annual report for the fiscal year 1914. This abandoned station was turned over to the fortification division for use as a storehouse. Cuts of the pump stations were given in the annual report for the fiscal year 1914.

The trench for the Miraflores-Gamboa trench line was excavated by contract at a total cost of $22,573.22.

The construction of the Miraflores purification plant, which was about 45 per cent completed on June 30, 1914, was completed and the plant placed in operation on

March 16, 1915. Cuts and descriptions of the plant were given in the annual report for 1914. The purification plant consists of the following units at Miraflores: The wash-water tank, the aeration basin, the head house, the sedimentation basin, the filter building and pipe gallery, the laboratory and quarters, the clear-water basin, and the injection chamber. The total cost of the plant was $558,168.41, the cost of the work done during the fiscal year 1915 amounting to $203,625.12.

The delivery of water from the purification plant at Miraflores to pump station No. 3 at Balboa is through three parallel pipe lines, each 21,000 feet in length, 30, 20, and 16 inches in diameter, respectively. This distribution system was approximately 96 per cent completed on June 30, 1914, and the work was finished early in the fiscal year 1915. The cost of the work on this pipe line to June 30, 1914, was $191,493.73, and the cost of the work done on it in the fiscal year 1915 was $6,662.30.

As a part of the new Panama waterworks an extension was made to the existing high-service reservoir on Ancon Hill, at elevation 300, by constructing an addition having a capacity of 1,500,000 gallons. This work was practically completed at the close of the last fiscal year.

The following statement gives a summary of the cost of the new Panama waterworks construction, complete:

Balboa townsite work.-Work was in progress during the entire year on the construction of roads and walks and water and sewer systems and the grading and sodding of grounds in the Balboa townsite. This work was under the landscape architect from July 1 to November 1, and under the municipal division for the balance of the year. There was a total of 29,200 linear feet of asphaltic concrete streets constructed in the townsite during the year, at an average cost of approximately $1.90 per square yard, the cost of this street construction being as shown by the following statement:

There was a total of 7,600 linear feet of gravel paths with concrete block edging laid, with an average width of 6 feet, or the equivalent of 5,066 square yards, at a total cost of $1,367.82. In addition there was a total of 2,977 square yards of concrete pavement laid, having an average depth of 6 inches. This concrete pavement was laid in the vicinity of the administration building, the total cost of the work being $4,167.80. It was necessary to construct curtain walls on which to support a large portion of this concrete pavement, and this necessarily increased the cost of construction very materially. In connection with the concrete pavement around the administration building it was necessary to construct two flights of concrete steps, one on the south side of the building with 108 risers and three concrete landings, the total width of the steps being 40 feet, and the cost of the entire flight approximately $13,000; the second flight of steps was on the north side of the building, and has a width of 12 feet and cost $5,009.59.

There was a total of 21,000 cubic yards of excavation necessary for the grading around the administration building, at a total cost of $63,000. In the vicinity of the administration building and in the Balboa townsite there was a total area of 235,000 square yards graded, at a cost of $53,450, and a total area of 185,000 square yards sodded and planted in grass, the cost of this work being $16,650.

The total length of sewer pipe installed in the Balboa townsite was 11,791 feet, at a cost of $7,400.54, as shown by the following table:

The water system in the townsite included the installation during the year of a total of 4,199 feet of pipe at a cost of $4,071.90, as shown in the following table:

An earth fill was placed in the part of Balboa townsite lying to the west of the Prado, a total of 105,817 cubic yards of material being required. The material for this fill was obtained from Diablo Hill, and all of the work was done by contract at a cost of 33 cents per cubic yard.

Cemetery ridge work. The necessary roads were constructed and the water and sewer lines installed for the houses located on cemetery ridge, Balboa. This work consisted of the laying of 590 feet of 6-inch vitrified pipe and 141 feet of 8-inch vitrified sewer pipe and 340 feet of 4-inch and 520 feet of 6-inch cast-iron water pipe, and the construction of 666 square yards of asphaltic concrete pavement. This work as a whole was approximately 99 per cent completed on June 30.

Special road work, Ancon district.-A 12-foot macadam road with the necessary ditches, culverts, etc., was constructed from back of the Ancon corral to connect with the Bishops Hollow Road near the low-service reservoir, a length of 900 feet at a total cost of $1,750.

An asphaltic concrete road 18 feet in width was constructed from the Ancon post office for a distance of 955 feet to intersection with the Tivoli Road, the cost of this work being $5,209.80.

The work of widening the street known as the Bishops Hollow Road and the construction of an asphaltic concrete pavement in same 22 feet in width, which was commenced the latter part of the year, was 84 per cent completed on June 30. The cost of the work to that date was $21,384.

Ancon outfall sewer.-The sewer outfall from the Ancon district was diverted from the Panama system and run into the Curundu River, this work requiring the installation of 746 feet of 8-inch, 2,619 feet of 10-inch, and 1,646 feet of 12-inch pipe. The cost of the work was $3,526.15.

La Boca silver town.-Under special authority an extension of the silver town of La Boca was made by the construction of blocks A and B. This included the construction and installation of the following:

Division of terminal construction.-Under authority of a work request from the division of terminal construction a complete piping system from the Balboa oilhandling plant was installed, this work including the erection of the manifold and the installation of the pump and the laying of a 10-inch crude-oil line, a 6-inch Diesel oil

line and a 4-inch water line from the pumping plant to the oil berth a distance of approximately 2,300 feet. A 12-inch suction line and a 10-inch discharge pipe, each 3.840 feet in length, were installed from the oil-handling plant to the storage tanks. 1 rom the storage tanks to Paraiso, a total distance of approximately 34,968 feet, the following lengths and sizes of pipes were laid as a distribution system for points between Balboa and Paraiso:

10-inch pipe..

8-inch pipe.. 9-inch pipe.

7-inch pipe..

Feet.

8, 527 22, 676 2,086 1, 680

The cost of the work of this division on the oil-handling plant and the pipe-line distribution system amounted to $47,535.46.

Under special authority a permanent 6-inch cast-iron water line was laid to the fueloil handling plant, at Balboa, the line consisting of 1,808 linear feet of 6-inch pipe, and the cost of the work was $1,446.40.

A partial piping system was installed in Dry Dock No. 1, Balboa, the work being approximately 95 per cent completed on June 30, 1915. The estimated cost of the work was $2,500.

Panama Railroad Company.-Under authority of a work request from the Panama Railroad Company, a sewer system was installed for the San Miguel district, consisting of 1,800 linear feet of 8-inch pipe and 259 feet of 6-inch pipe, at a total cost of $1,029.62.

The work of grading the grounds and paving and constructing the water and sewer lines on the Huerta Sandoval tract in Panama city to be used for stable lots, was done by the municipal division at the request of the Panama Railroad, the cost of the work amounting to $6,712.83 being charged to the Panama Railroad. The work included the construction of 2,333 square yards of concrete pavement, and the installation of 475 feet of 15-inch and 1,368 feet of 8-inch drainage pipe and 554 feet of 6-inch and 564 feet of 4-inch water pipe.

The brick pavement on the Calidonia Bridge in Panama city was renewed by the municipal division at the expense of the Panama Railroad Company, a total of 961 square yards of brick pavement being relaid at a cost of $2,957.54.

Health department. On request of the health department the quarantine reservation on Balboa dump was graded and the necessary water and sewer systems were installed and roads constructed. The work done consisted of the following:

Corozal farm.-Under authority from the health department a road and water and sewer system was constructed to take care of the Corozal poor farm and insane wards. This work included the installation of 2,139 feet of 4-inch cast-iron water pipe and 2,144 feet of 8-inch vitrified pipe, and the construction of 2,400 feet of 12-foot macadam road. The total cost of this work was $6,270.

A total of 3,800 linear feet of concrete ditch was constructed along the two sides of the cemetery hill, Balboa, and necessary grading work in connection with same performed by the municipal division for the health department. The cost of this work was $2,850.

Supply department.-A park area was constructed by the municipal division for the supply department in front of the Ancon commissary. The work consisted of the construction of 1,714 square yards of asphaltic concrete pavement and 1,689 linear feet of curb and gutter, and 176 square yards of concrete pavement, and the installation of 670 linear feet of 12-inch drainage pipe. A fill of 2,500 cubic yards was made. The total cost of the work was $7,935.70.

Electrical division. On work request from the electrical division the municipal division constructed an extension of the cast wall of the Miraflores spillway, this work requiring the construction of 2,000 cubic yards of concrete wall at a total cost of approximately $14,480.28.