Communication in relation to a supply of water to the city of Baltimore / by Alfred Duvall.

  • Duvall, Alfred.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Communication in relation to a supply of water to the city of Baltimore / by Alfred Duvall. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

    6/24
    per Mr. Sickels' report, an area of some thirty-seven and one half acres, and with but slight excavations, give a reservoir of a depth of 15 feet in shallowest parts. I propose the dam or embankment shall be raised sufficient to give an elevation for the surface of the water in the reser- voir of some 175 feet above tide—such elevation being some 7 feet higher than that proposed by Mr. Sickels, and from the formation of the valley proposed to be flooded, I feel satisfied an area of some 50 to 55 acres will be flooded, and so as to give a depth of 15 feet in shallowest parts of the same without requiring entensive excavations. An elevation of 175 feet above tide will give water to nearly all the improved parts of the City. CAPACITY OF RESERVOIRS. I assume the reservoir, that may be formed in the valley of Herring Run by the erection of a dam at the point named, will flood an area of at least thirty-two acres, that may be reckoned to have a perpendicular depth of 15 feet in shallow- est parts. The reservoir that may be formed in Tiffany's Valley, by jamming or embanking as named, will give, I assume, with bu 't slight excavations, an area of at least fifty acres, that may be 1 eckoned to have a perpendicular depth of 15 feet in shallo west Parts of same. Assui ^nS tne areas anc* depths for reservoirs as named, viz. thirt) T_two acres *n tne valley of Herring Run, and fifty acres in thi * van<ey °f Tiffany's Run, allowing for a perpen- dicular depth of 14 feet (to the named areas,) that may be drawn off for s. nPPlv> we have> a(Ming the areas (32+50) of the two reservoii s> eignty-tw0 acres area, or 3,571,920 super- ficial feet, which witl1 the dePtn named> give a supplying capacity of 50,006 I ^80 cubic feet' or 374>°77,440 wine gals, of 231 cubic inches tc 'lhe gaUon Dividing 374,077,440 by 74, we find that the reservoirs> when filled, will furnish