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This contract is for the completion of the Hudson siphon, The work and a deep pressure tunnel forming a portion of the Catskill aqueduct, in the Hudson River division of the Northern Aqueduct department. This siphon comprises a tunnel to extend under the river, about 1,100 feet below the water surface, between Storm King and Breakneck mountains, and two shafts on the opposite shores, in the towns of Cornwall, Orange county, and Fishkill, Dutchess county, New York. The two shafts are 3,022 feet apart.

The City has already done portions of the work on the Work already

accomplished. siphon. Construction plants, accessories and supplies have been assembled at each shaft for shaft sinking and tunnel driving. The shafts, generally circular, 16 feet 6 inches in diameter to the "Cline" of excavation shown on the drawings, have been sunk to grade and timbered, and portions of the tunnel have been driven from each shaft. The East shaft has been sunk below tunnel grade as a sump. The City proposes to continue construction operations until the service of notice to begin work under this contract, at which time The Contractor must be prepared to continue the work vigorously,

Work in this contract.

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The work embraced in this contract, therefore, is: completing the tunnel excavation; removing from the shafts the support and construction equipment; lining the shafts and tunnel with concrete; making and completing connections at each end of the siphon with adjacent portions of the aqueduct being constructed under other contracts; sealing and refilling the West shaft above the connection with Moodna siphon; furnishing and placing a large cast-steel cover on, and constructing a concrete chamber at the top of, the East shaft, and removing the temporary buildings and plants so as to leave the premises in acceptable condition at the completion of this contract. All the work included in this contract is described in the acompanying specifications and shown on a set of contract drawings.

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Construction plants, accessories and supplies.

The construction plants, except buildings reserved, the miscellaneous equipment and supplies on the ground or ordered or contracted for by The City previous to the date of service of notice to begin work under this contract, are to become the property of the Contractor, in accordance with the terms of the contract, and are to be used by him to the extent desired. The buildings housing the plants, tools and supplies have been conspicuously numbered to facilitate identification in the field, and the contents of the several buildings, as of February 15, 1911, appear in the following inventory. Bidders must satisfy themselves, by personal examination and by such other means as they choose, of the accuracy of these schedules.

Access to shafts.

For the convenience of the intending bidders who visit the site of the work The City's launch may be used for crossing the river between the shafts. Access from the public highway to the West shaft is afforded over a road constructed on a private right-of-way. A public highway passes within few feet of the East shaft. In order to minimize interruptions to operations now actively in progress, intending bidders are requested to plan their inspection of the shafts for two days,

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to be fixed by the Engineer, when the hoists will be run espeshaits et cially for their convenience. is and to 115 at 12

The principal geographic features near the site of this work duct bez

are shown on the locality map, which is Sheet 2 of the contract filling

drawings and complete topography of the region may be found
on the Schunemunk and West Point quadrangles of the U. S.
Geological Survey.

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Sealed bids or proposals for performing the work described Date for

opening bids. herein will be received by the Board of Water Supply at its offices, seventh floor, 165 Broadway, New York, until

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at 11 A. M., at which place and time they will be publicly opened
by the Board and read; the award of the contract, if awarded,
will be made by the Board as soon thereafter as practicable.

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for bids.

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All bids must be made upon the blank form of proposal Printed form attached hereto and should give the price for each item of the work proposed, both in writing and in figures, and must be signed and sworn to by the bidder, in accordance with the directions in the form of bid. Each bid must be enclosed in the printed envelope provided for the purpose by the Board, and sealed.

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No bid will be received and deposited unless accompanied Certified by a certified check upon a National or State bank, drawn and made payable to the order of the Comptroller of The City of New York, for thirty thousand dollars ($30,000) for the proper execution of the contract. Such check must not be enclosed in the sealed envelope containing the bid, but shall be delivered to the Board, or its Secretary, who will give a proper voucher for the deposit. All such deposits, except that made Checks by the bidder to whom the contract shall be awarded, will be returned to the person or persons making the same within three days after the decision as to who shall receive the contract.