334 



THE IMPROVEMENT OF RIVERS. 



contractor at his own expense, and he shall be liable for any and all damage due to 

 neglect in this particular. 



QUANTITIES. 



75. From the nature of the work it is impossible to estimate with accuracy the 

 quantities of material required. The amounts named below will be used in canvassing 

 the bids; but the bidders must so fix their prices as to permit increase or diminution 

 in the amounts required, within the limits stated for each; and it is understood and 

 agreed that such increase or diminution, whether resulting from error in estimate or 

 from modification of plans, shall form no basis for any claim against the United States. 

 The quantities given do not take into account nails, spikes, bolts, tie-rods, etc., to be 

 furnished by the contractor and included in his price for other materials in the temporary 

 work : 



(If the lock is to be of stone, the amounts of the various classes of masonry should be given.) 



76. Measurement. Measurement for payment of all work and material shall be 

 made net, in place, unless otherwise specified. 



77. Losses. Material of any kind lost or damaged through the fault or negligence 

 of the contractor shall be replaced by him at his own expense. Material of any kind 

 lost or damaged by natural causes before that portion of the work in which it is placed 

 has been accepted, shall be replaced by the contractor at his own expense. 



78. Materials not Mentioned. Payment will be made to the contractor only as 

 hereinbefore specified. All materials and work not mentioned as to be estimated for 

 payment, and which may be necessary to complete the work, shall be furnished by 

 the contractor at his own expense. 



