Jun 28, 2002

Submersible and Trailer and Vertical Pumps Solve Stormwater Problems

PROJECT DESCRIPTION: To transfer stormwater from a creek to an adjacent river during
periods of high water during storms and spring thawing. The stormwater from the
creek contains a large amount of debris and sticks. If the creek water is not
transferred to the river fast enough, a backup occurs creating flooded streets
and residences.


KEY ELEMENTS OF JOB:  After discussion with
the client on what he wished to do, a visit to the site was necessary to gather
more details. The situation during storms and high water runoff was a need to
move large amounts of water containing debris in a short amount of time because
of the narrow creek width. Also, electric power was frequently unavailable
during storms because of power outages.


The customer first purchased a Crisafulli 12-in. PTO Humpback Trailer Pump
because of its non-electric power requirement, high volume pumping and
potential ability to pass debris from the channel. After using the trailer pump
effectively through one storm season, the village purchased a Crisafulli 16-in.
vertical PTO pump to supplement the trailer pump for this application.


During the same year a new lift station was being designed
for stormwater management at another site in the village of Winnetka, Ill. A
slight conflict arose as to what type of power source (electric or PTO) to use
on this application.  A Crisafulli
l6-in. Vertical Electric/PTO was chosen to satisfy both opinions: Electric
power is cheaper than manning a PTO driven pump, but if electricity is not
available the PTO drive still works. The specification for this project was
written around the Crisafulli Pump because of its proven track record with the

The next year brought the design of an additional three-pump
stormwater stations for the creek to meet the final design and complete pumping
requirements for this site. This application was designed by a consulting
engineering firm, and not by the village as the previous applications were. The
engineer chose another style of pumps (not made by Crisafulli) for the
application. The complete project cost for the three alternate pumps, lift
station and controls was over $100,000 for equipment only.

Some of the village managers were not happy with the choice
of these alternate pumps or the final cost after seeing the performance and
price of the Crisafulli Pumps in the past on the same application.

However, the project was completed and the results were
terrible with the (non-Crisafulli) pumps. They could not handle the debris from
the stormwater runoff and had drastically different pumping rates at different
heads. There was also some conflict with the engineer’s total head
condition estimate and the actual total head. These problems are not uncommon
for a cast rather than a fabricated pump.

The alternate pumps were eventually replaced by three
Crisafulli 16-in. Vertical Pumps for about half the cost. These three new
Crisafulli pumps were a direct purchase by the village and not by bid.  A fourth pump was added in 2001 for
increased flow.

After the success of the Crisafulli Pumps for the village,
the decision for them to buy a Crisafulli hydraulic pump for a replacement to
an existing competitor’s pump was a given. This pump is used by street
department personnel to dewater various pits and manholes.

The Crisafulli Pump line offers a variety of pump
configurations, drive designs and control packages to meet the most demanding applications for any client. The fabricated design offers the benefits of flexibility and capability of passing heavy solids and debris without sacrificing flow. Customers have also commented on the simplicity of the pump design and the ease of maintenance and serviceability of the Crisafulli Pumps.

About the author

For additional information, contact SRS Crisafulli at