of the swamp is made up in length. largely of black vegetable Although the old canal matter, often saturated was supposed to provide a with water and during a depth of six feet through- large part of the year cov- out, its available depth ered in places with stag- was scarcely half that nant pools.… … lumber. miles long and had a level of 16'30 The plan of improvement recom- feet. From Northwest Lock to Fig. 2 -SECTION THROUGH FRONT END OF HYDRAULIC DREDGE. Culpeper Lock, 879 miles mended in 1896 was prac- was the summit level, 1973 tically the same as that of feet above Elizabeth River I 1880,…
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