This meant a long delay, but at last, in 1825, the great work was undertaken; since 1836 there has been a continual struggle to compel the Government to do its duty by the Ohio River and its great commerce. In 1837 the Government commenced a system of surveys and an improvement of the low-water channels by means of riprap stone dams, arranged so as to prevent the spread of the water by guiding and maintaining it in comparatively narrow channels. The work was put under the direction of Captain Sanders of the War Department. This system was continued at intervals until 1844, when, the appropriation being exhausted, the work suddenly ceased, not to be resumed until 1866. Something of the difficulties of the old engineers may be estimated from the records left by them concerning the various obstructions in the Ohio River. "Thirty years ago," wrote an engineer in 1866, "there were considerable tracts of woods abounding the stream ... forming dangerous obstructions to navigation. Gradually, since that period, the number of settlers along the river valley has greatly increased, and the bottom lands ... have been cleared; so that comparatively few trees remain that are liable to fall into the stream. And the same is true of most of the principal tributaries. I refer to this to show the probability that when the present snags and logs are removed, a slight expenditure annually will keep the river clear of this character of obstructions." The snags and logs of generations had been almost untouched by the government--"left to the uncertain and unpaid-for attention of private individuals." The plan now (1866) to rid the valley entirely of these great impediments to navigation marks a new era in the history of the Ohio. It was found, upon examination, that in the six hundred odd miles between Pittsburg and Louisville there were seventy-five separate points where there were snags, forty-nine "logs and loggy places," twenty-eight wrecks and seventy-two "sunken boats &c." Between Louisville and Cairo there were some sixty additional obstructions of similar nature--a total of two hundred and eighty-five obstruction points. A schedule of these obstructions, between Pittsburg and Wheeling for instance, will be found interesting. The asterisks refer to obstructions in or near the channel at comparatively low water: _Distance_ _from_ _Snags,_ _Wrecks, etc._ _Remarks._ _Pittsburg._ _etc._ ---------------------------------------------------------------------- 2-1/2 Wreck. In the right channel of Brunot's island below the point on the left side. 3 Wreck. Same side as last, half mile below. 3-1/3 Sunken barge. Left channel Brunot's island, first below point.