The Determination of Minimum Flows for Sulphur Springs, Tampa

DRAFT
The minimum flow rule for the Lower Hillsborough River also specified that the minimum
flow would be re-evaluated by 2005, including tests of minimum flow releases up to and
above 30 cfs. The study design document for this re-evaluation (Janicki Environmental
2002) listed a series of minimum flow tests that involve varying combinations of flow to
the lower river water released from the reservoir or diverted from Sulphur Springs.
Figure 2-13. Flume discharge structure at base of reservoir dam.
The diversion facilities at the spring pool were modified so that varying amounts of
springflow could be diverted to the reservoir and the base of the dam, while allowing the
remaining springflow to discharge to the spring run. To accomplish this, a return pipe
and junction were put in the intake that leads from the spring pool to the pump house.
This return pipe was fitted with a valve and flow meter so that variable amounts of water
can be sent to the reservoir and/or the base of the dam, with the remaining flows
returned to the spring pool. The return pipe terminates above the concrete wall forming
the spring pool (Figure 2-14).
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