Diversions of Ocklawaha River Water through Buckman Lock of Rodman Reservoir
An Information, Opinion, & Sources Report
Compiled by Ocklawahaman Paul Nosca
With the assistance of Captain Erika Ritter
Revised: 25 October 2013
The Florida Department of Environmental Protection (FDEP) provides an excellent online description of the H. H. Buckman Lock (along with some of the other remnant Cross Florida Barge Canal water control structures) at http://www.dep.state.fl.us/gwt/cfg/pdf/FACT%20SHEET.pdf
Here are some excerpts from this FACT SHEET:
"Lock Size: 600 feet long, 84 feet wide, and 14 feet over gates sills. The top edge of the concrete gate sill on the upstream side is 6 feet above sea level."
"Gallons of Water: Some 8,501,170 gallons of water are used in each lockage when the elevation of the reservoir is at 20 feet above sea level."
More information about Buckman Lock is available at this FDEP webpage: http://www.dep.state.fl.us/gwt/cfg/Buckman.htm
Officials of FDEP stated in 2008 that three lockages are usually performed during each day that locktender personnel are on duty (Jena Brooks, Mickey Thomason, & Dave Bowman; personal communication aboard Capt. Erika Ritter's boat on 7 May 2008).
Excerpted from "U.S. Geological Survey Water-Supply Paper 2300" (1984) "FLORIDA Surface-Water Resources" page 188:
"Evaporation from Lake Oklawaha [sic] and diversions through Buckman Lock have contributed to the downward trend in average discharge by water year for the Oklawaha River..."
Buckman Lock water diversion math calculations
8,501,170 gallons of water X three lockages per day = 25,503,510 gallons of water per day.
25,503,510 gallons of water = 25.5 million gallons of water per day (MGD).
25.5 MGD X 1.55 = 39.53 CUBIC FEET PER SECOND (CFS) OF WATER.
NOTE: This would only apply to the days when locktender personnel are on duty--currently only four days per week!
USGS Stream-Flow Gage at Buckman Lock
"USGS 02244032 CROSS FLORIDA BARGE CANAL AT BUCKMAN LOCK" (about 5 miles to the northeast of Rodman Dam)
REFERENCE AS: Nosca, P. 2013. "Diversions of Ocklawaha River water through Buckman Lock of Rodman Reservoir" webpage report. "Ocklawahaman" website. Paul Nosca, Eureka, FL.