 In this latter position he remained until his death, giving to the work his best energies and nearly the whole of his time.The new policy of deepening the low water channel of the river by dredging rather than by contraction works, which the commission adopted during his membership, was very largely the result of his efforts.Colonel Flad was a charter member of the Engineers Club of St Louis, and was its President for twelve years, from 1868 to 1880.