60 Papers connected with the construction 



[No. SI 



expense of thirty-six pagodas each (after the first cost) per month, will 

 excavate from the bottom in the course of the year,* fifty-thousand one- 

 hundred and seventy-six cubic yards, by a very moderate calculation, 

 which is equal to the excavation required to deepen the channel from the 

 sluices outwards nearly three times repeated in the year, as this excava- 

 tion, to attain all the purposes of entering the river does not appear from 

 careful soundings, to exceedf eighteen-thousand yards. The use of these 

 Ballast lighters must at all events be necessary to deepen the channel in 

 the first instance, and the continuance of them would be attended with 

 very trifling expense, if thought necessary, which I by no means think 

 they will be, as I conceive the operation of the backwater to be fully 

 sufficient for the purpose. But I thought it best to anticipate objections 

 on the subject of deposition, by mentioning an additional mode of reme- 

 dying its effects. 



The advantage of overcoming the danger and difficulty of the surf, and 

 of being able to enter the river in any kind of boats with perfect safety, 

 and which I hope will be admitted ; a well founded expectation, is not 

 the only one that will naturally result from this plan. 



From observing the soundings in the river, taken before the monsoon, 

 it is evident, that to render it navigable for such boats, as may now be 

 supposed to enter it, will requre little expense, I therefore propose to 

 deepen it towards the bridge next the Governor's gardens, and from 

 thence continue a communication for boats by a cut as marked 0 in plan 

 No. 3 into the ditch of the Black town near the south-west angle, ad- 

 joining to which, a basin may be made for the reception of boats, from 

 thence it may still be continued without any material trouble along the 

 south side of the Black town by the glacis of the Fort, and by enlarg- 

 ing and deepening the drain across the esplanade, the navigation may be 

 continued to Popham's broad- way, where another basin may be formed. 

 This same drain may, by the purchase of only two concerns of no great 

 value, be still further carried on in the same direction as far as the low 

 swampy ground now under paddy fields, called Attapollam, about four- 

 hundred yards west of the present Custom house ; here I could establish 

 a third basin for the reception of boats, and the delivery of merchandize. 



Dr. C. C. ft. C. ft. times in one hour Days C. yds. 



* 2 X 25 X 7856= 7856 X 72 = 565-488 X 8 X 300 -r 27 = 50179 



B. L. D. C. ft. C. yds. 



f 160 X 450 X 4 = 488000 -4- 271 = 8000 



