FIFTH ANNUAL YEAR BOOK — PART VI. 533 



SPECIFICATIONS. 



The lines for the ditches are indicated on the field by stakes which have been set by 

 the engineer, and the depths and grades given by him shall constitute a part of these 

 specifications. 



Digging the ditclies. —The digging of each ditch must begin at its outlet or at its June* 

 tion with another tile drain, and proceed towards its upper end. The ditch must be dug 

 along one side of the line of survey stakes, and about ten inches distant from it, in a 

 straight and neat manner, and the top soil thrown on one side of the ditch and the clay on 

 the other. When a change in the direction of ditch is made, it must be kept near enough 

 to the stakes so that they can 1)e uued in grading the bottom. In taking out the last draft, 

 the blade of the spade must not go deeper than the proposed grade line or bed upon which 

 the tiles rest. 



Grading tlie bottom .—HhQ ditch must be dug to the depth indicated by the figures 

 given with the survey, which depth is to be measured from the grade stakes which are set 

 for that purpose, and graded evenly on the bottom by means of the ' 'line gauge method" 

 or ' 'target, " or any other equally accurate device for obtaining an even and true bottom 

 upon which to lay the tile. The bottom must be dressed with the tile hoe, or in case of 

 large tiles, with the shovel, so that a groove will be made to receive the tile, and when 

 laid in it will remain securely in place. 



Laying the tile. —The laying of the tile must begin at the lower end and proceed up- 

 stream. The tile must be laid as closely as practicable, and the lines free from irregular 

 crooks, the pieces being turned about until the upper edge closes, unless there is sand or 

 fine silt which is likely to run into the tile, in which case the lower edge must be laid 

 close, and the upper side covered with clay or other suitable material. When, In making 

 turns, or by reason or irregular-shaped tile, a crack of one-fourth inch or more is neces- 

 sarily left, it must be securely covered with broken pieces of tile. Junctions with branch 

 lines must be carefully and securely made. 



Blinding the tile.—A.iter the tile have been laid and inspected by the person in charge 

 of the work, they must be covered with clay to a depth of six inches, unless, in the judg- 

 ment of the superintendent, the tile are sufl&ciently firm, so that complete filling of the 

 ditch may be made directly upon the tile. In no case must the tile be covered with sand 

 without other material being first used, 



iJisA; dwringr construction.— The ditch contractor must assume all risks from storms 

 and caving in of ditches, and when each drain is completed it must be free from sand and 

 mud before it will be received and paid for in full. In case it is found impracticable, by 

 reason of bad weather or unlooked for trouble in digging the ditch, or properly laying 

 the tile, to complete the work at the time specified in the contract, the time may be ex- 

 tended as may be mutually agreed upon by the employer and contractor. The contractor 

 shall use all necessary precaution to secure his work from injury while he is constructing 

 the drain. 



The tile to be ttsed.- Tile will be delivered on the ground convenient for the use of the 

 contractor. No tile must be laid which are broken, or soft, or so badly out of shape that 

 they can not be well laid and make a good satisfactory drain. 



Pajjments for work. —Ucilea othec wise here^Uer agreednpon, the contractor may at 

 any time claim and receive from the employer seventy-five per cent of the Rvalue of com - 

 pleted and accepted work at the price agreed upon in the contract. Twenty-five per cent 

 will be retained until the entire work contracted for is completied and accepted, at which 

 time the whole amount due will be paid. 



Prosecution of the work. —The work must be pushed as fast as will be consistent with 

 economy and good workmanship, and must not be left by the contractor for the purpose 

 of working upon other contracts, except by permission and consent of the employer. All 

 survey stakes shall be preserved and every means taken to do the work in a flrst-olass 

 manner. 



Failure to comply with specifications. —In case the contractor shall fail to comply with 

 the specifications, or refuse to correct faults in the work as soon as they are pointed out 

 by the person in charge, the employer may declare the contract void, and the contractor, 

 upen receiving seventy-five per cent of the value of the completed drains at the price 

 agreed upon, shall release the work and the employer may let it to other parties. 



Subletting work. —The contractor shall not sublet any part of the work in such a way 

 that he does not remain personally responsible, nor will any other party be recognized in 

 the payment for work. 



