continually pumped water from the site to facilitate concrete
Crews began work on the Miller Pump Station in 2013.
The project is on track for completion in 2018. To date, Xypex Admixture C-500 has been used in the more than 26,000
cubic yards of concrete required to construct the Miller Pump
Station facility. The waterproofing treatment will provide permanent waterproofing and chemical protection even under
extreme hydrostatic pressure.
When complete, the Miller Pump Station will pump water
from the Miller Canal into a spreader basin for release into the
downstream restoration area. The Miller Pump Station comprises two 75-cfs, low-flow pumps and six 235-cfs pumps
(with one 75-cfs and one 235-cfs unit serving as a back-up
pump) for a capacity of 1,250 cfs and eight bays.
Xypex crystalline technology is designed to react with the
by-products of cement hydration in the capillary tracts and
voids of concrete to produce a non-soluble crystalline struc-
ture that fills and plugs the pores and capillary tracts, plug-
ging them against the penetration of water-dissolved chemi-
cals such as chlorides, sulfates and acids. Unlike coatings and
membranes, this “crystallization” becomes a permanent, in-
tegral part of the concrete substrate and will not peel or flake
off like a coating. It can be installed as a surface treatment on
the positive or negative side of a concrete structure or used as
an admixture during the batching of the concrete mix. WW
About the Author: Christy Krone is a sales representative for Xypex in Florida. Xypex’s
crystalline technology has been serving concrete users around the world for more
than forty years. To learn more, visit www.xypex.com.
Xypex admixture at Miller Pump Station concrete batch plant.
-------- XYPEX con’t FROM page 29
level and what controls it? Are there any upstream water lev-
el limitations? There are guidelines for velocities both in the
approach to a screen and through a screen grid. The velocity
recommended through a grid varies depending on how clean
a screen is. Some screens types are designed for 30 percent
blinding while others need a more conservative 50 percent.
Will the equipment be inside or outside and need heat
tracing? Are there limitations on the space for a screen (both
headroom and angle of inclination)? Is there water available
for equipment that requires it? Will conveyors or a water
sluice be needed to bring screenings to a common washer/
compactor? These are all important questions to ask when
selecting the right screen to do the job. WW
Wendi Richards, P.E., is process engineering manager with Siewert Equipment with
25 years of engineering experience in water and wastewater treatment. She is a
licensed professional engineer in New York and has BS and MS degrees in Environmental & Resource Engineering from the SUNY College of Environmental Science and Forestry (ESF). In her current role with Siewert Equipment, a division of
Cummins-Wagner, Richards develops and manages all aspects of process treatment
technology and equipment sales in New York State. For more information, please
Circle No. 243 on Reader Service Card
we’ve characterized the influent and determined a suitable
screen and grid to protect equipment, the remaining question
is: will it fit physically and hydraulically?
The existing channel dimensions and hydraulic profile are
extremely important when determining the screening equipment that can fit. What is the existing downstream water
Within a screen type, each manufacturer differs in materials of construction, frame design, protection of moving parts from grit and debris, carrying capacity, and how the screen is cleaned.
-------- SCREEN con’t FROM page 23