SWMM56

    I am afraid, judging by the gingerly manner in which we went down the shaft, that we should not have been much good had any great difficulties been encountered. It was a primitive sort of ladder we had to go down, merely consisting of iron rings driven into the wall at intervals, and in our cumbrous and unaccustomed attire it was not a very comfortable job. However, we got down without any casualties, and, arrived at the bottom, found one of the sewermen waiting for us. He provided us each with a wooden sconce holding a candle, and thus provided we went along a short, sloping passage, at the end of which stood another guide, who assisted us to step down into the sewer itself. 

From the South Florida Watershed Journal F ifteen gallons per minute A lternative measurement units: 0.03 cubic feet per second 508 barrels per day (using 42.5 gallon barrels) 24 acre feet per year 7.9 million gallons per year 12 Olympic swimming pools per year