J0 6 THE IMPROVEMENT OF RIVERS. 



GENERAL SPECIFICATIONS FOR A LOCK, 



INCLUDING SPECIFICATIONS FOR TMK FOLLOW! N 



COFFER-DAMS; PILE FOUNDATIONS; TIMBER GUIDE-CRIBS; 



EXCAVATION; CONCRETE MASONRY; TIMBER LOCK GATES; 



ROCK FOUNDATIONS; STONE MASONRY; STEEL LOCK GATES; 



IRON-WORK. 



SPECIAL DESCRIPTION. 



1. The contractor must begin work within 30 days after receipt of notification of 

 approval of his contract. He shall notify the Engineer Officer at least one week in 

 advance of the day on which he intends to begin work. 



2. In case the available funds shall become exhausted before the completion of 

 the contract, the Engineer Officer will give 30 days' written notice to the contractor 

 that work may be suspended; but, if the contractor so elect, he may continue work 

 under the conditions of these specifications after the time set by such notice, so long 

 as funds are available for expenses of superintendence and inspection, with the under- 

 standing, however, that no payment will be made for such work until additional funds 

 shall have been provided in sufficient amount. In case of suspension due to lack of 

 funds, work must be resumed within 30 days after receipt of written notice that the 

 additional funds are available for continuing the work. 



3. In case other contracts shall be in force at the locality during the progress of the 

 work under these specifications, all roads and grounds, and the river in the neighbor- 

 hood of the work, shall be open alike to the use of all the contractors, and the con- 

 tractor for one part of the work will not be permitted so to arrange his plant or 

 working force as to interfere with other parts of the construction. 



4. Contract Time. The contract must be completed within months * after receipt 



by the contractor of notification of approval of his contract by the Chief of Engineers; 

 provided, however, that in case of any interruption of the work due to failure of appro- 

 priations, the time fixed for completion shall be extended an equivalent period. 



5. Work to be Done. The work to be done under these specifications is the exca- 

 vation for, and the construction, complete, of a lock and approach cribs, to be known 

 as Lock No...., River. The location, dimensions, and general construc- 

 tion are to be as herein described, and as shown on maps and drawings to be seen at 



the U. S. Engineer office at , which maps and drawings form part of 



these specifications. 



6. Location. The site for the lock is at , on the Railroad. 



7. Dimensions and Material. The lock will be feet long over all, with a clear 



width of feet in the chamber; the walls will be of , the gates of The 



construction of the cribs will be- as hereinafter described. 



* This may be varied to specify a fixed number of fair working days, allowing for inclement weather, 

 highwater, etc, 



