English (United States)
Columbus, Neb.- ”Clean. Drain. Dry.” Three simple, but important words.
That’s the message from the Nebraska Invasive Species Project, and one that Nebraska Public Power District is also sending to boaters who may be using waterways in- or out-of-state. The ultimate goal is to keep zebra mussels and other invasive aquatic species from Nebraska waterways and eliminate the possibility of expensive cleaning and replacement of power plant infrastructure.
Zebra mussels spread to new waterways when boats carrying mussels from infested waters are put into uncontaminated rivers or lakes.
With sightings last winter of zebra mussels at Lake Zorinsky in Omaha, NPPD is urging boaters to follow the three easy steps to help prevent the movement of these aquatic hitchhikers. These small, black and white striped mollusks, about an inch or less in size, are highly prolific aquatic creatures and can cause millions of dollars of damage to intake structures at power plants.
“The message being sent by the Nebraska Invasive Species Group is an important one. Several NPPD power plants use reservoir or river water for the generation of electricity,” said NPPD Corporate Environmental Manager Joe Citta. “Cleaning clogged intake structures or replacing equipment can be expensive as we have seen at several power generating facilities.”
Canada's Ontario Hydro spent $10 million for chlorination and dechlorination equipment to prevent mussel larvae from settling and attaching. The coal fueled Monroe (Mich.) Power Plant on western Lake Erie has spent more than one-half million dollars for cleaning zebra mussels from its cooling system and expects to spend an additional $50 million for remedial work and pipe replacement.
NPPD uses water from Sutherland Reservoir for Gerald Gentleman Station near Sutherland, and Lake Maloney, which feeds into the North Platte hydro. Water from the Missouri River is used at Cooper Nuclear Station. All three facilities have the potential for problems from the spread of these aquatic hitchhikers.
Water intake structures and pipes drawing water into power plants can become clogged, forcing the utility to reduce power production. Beyond electric generation, zebra mussels can block a boat’s cooling system causing overheating; jam steering equipment; increase drag on the bottom of a boat; and require scraping or repainting of a boat’s bottom.
As boating activity begins to gear up for the upcoming Memorial Day weekend and summer months, NPPD supports the “Clean. Drain. Dry” effort of the Nebraska Invasive Species Project aimed at stopping aquatic hitchhikers. “It is critical we stop any aquatic hitchhikers that could eventually create damage to our power plants,” said Citta, “and eliminate the cost of repairing and cleaning lines.”
NPPD recommends the most important way for boaters to address the spread of zebra mussels is to check their equipment for these aquatic hitchhikers and remove any visible mud, plants from the boat, fish, or animals. What may appear to be harmless species, such as the zebra mussels, have been known to travel in ballast water, attached to boats, and transported between reservoirs.
Clean, dry, and drain all equipment that comes into contact with the water. If there is a place for water to collect, there is a chance that zebra mussels or other similar invasive species may be transported, including on boat trailers. Boaters should drain the bilges and live wells in their boats, and if unable to be drained, a cup of bleach can be added to kill any live mussels.
It is also a good idea to dry the boat for several days before its next use. If possible, power-wash the boat, motor, and trailer to scour off invisible juvenile mussels.
Additional information on removing these aquatic hitchhikers can be found at http://www.snr.unl.edu/invasives/boater.htm.
When are rates set?
NPPD rates are reviewed annually, and any proposed rate changes are normally approved during NPPD’s December Board of Directors Meeting.
Will my bill be higher this month because of the cold weather and rolling outages?
Most NPPD customers can expect to see a higher monthly electricity bill this month due to the recent cold weather event which caused customers to have higher usage. A higher bill would not be the result of a rate increase however because the rates did not change.
Does my NPPD rate change throughout the year?
When proposing a rate change, NPPD typically sets and approves rates during the December Board of Directors Meeting. The rates that are approved go into effect February 1 of the next year.
The only other time NPPD’s rates change during the year is when the higher summer rates automatically go into effect for the months of June through September. Aside from this, any increase or decrease in your bill is likely tied to increased energy usage during severe cold or hot weather.
NPPD retail rates have remained steady with no overall increase in eight years.
How will February’s cold temperatures and rolling outages impact my rates in future years?
The financial impact of the most recent historic polar vortex events as it relates to rates are unclear at the present time. Many factors, including future weather impacts, load growth, and the cost to generate and deliver electricity will impact NPPD’s financial position and rates.
How will cold temperatures and rolling outages impact my monthly bill?
Simply put, if you use more electricity than “normal” you will have a higher bill. Rates have not changed. Think of it as a consistently priced fuel, that never fluctuates in price per gallon. If you need to fill up more often, it will require a larger amount of product, and as a result you have higher costs.
Does it take more energy and cost more to lower my thermostat now, only to raise it later to regain warmth?
This is a myth that many have heard for years. Contrary to belief, your system will operate for longer periods to recover and heat pump systems may switch to supplemental or auxiliary heat, but overall energy use is reduced if the setback occurs over at least a few hours.
NPPD operators at our control center handle increases and decreases in load and train for these situations. The operators refer to this as the Cold Load Effect. When customers are returned to service from a long outage, there can be a sharp increase in electricity usage that must be accounted for. As motors begin to start when the load is energized and more equipment powers on than was previously when the customer was interrupted. This means, when there are several customers experiencing an outage at the same time, operators need to consider the load when the circuit is restored can be higher than when it was interrupted. The longer a circuit is interrupted, the more pronounced the Cold Load Effect will be.
In the case of this most recent event, homes were using heat so consistently during the day and the interruptions were short enough that there was no significant change in electricity usage when one circuit was brought back online and another was turned off. During the rolling blackouts, when one group of customers was experiencing an outage, a new set of customers would betaken offline before the first group was returned to service. This helped ensure that there were no spikes in electricity usage that would have a negative impact on the generation and load balance.
Who can I contact for assistance with payment arrangements for my NPPD bill, or information on assistance agencies?
Payment arrangements can be arranged by contacting NPPD at 1-877-ASK-NPPD.
Those in need should also contact NPPD at the above listed number for more information and a listing of energy assistance from local agencies.
What is a rolling blackout outage?
Rolling blackouts, also known as rotating outages, are controlled, temporary interruptions of the electrical service directed by the Southwest Power Pool (SPP). These outages can occur when electricity generating resources cannot meet the electricity demand in the region. NPPD and others must reduce demand in an amount directed by SPP and act upon this within minutes.
When is a rolling blackout necessary?
Rolling blackouts are necessary as a last resort to maintain the reliability of the electrical grid system. SPP directs rotating outages when electricity generating resources cannot meet the electrical demand in the region. They rotate or roll to different systems and areas so we can all absorb a short outage at different times versus a long outage for one specific area.
The recent situation was extraordinary and an unprecedented chain of events, including historic low temperatures across the entire SPP footprint, lack of wind generation, reduced amounts of natural gas because of frozen wells and sky rocking natural gas prices. A situation never seen before in this region since SPP was founded.
Why was there little notice before power was shut off to some customers?
Just like many of our retail and wholesale customers, NPPD received the emergency notices from SPP with little warning, requiring us to load shed with just a few minutes to act.
NPPD did our best in this emergent situation to communicate not only to our large industrial and residential retail customers, but also with as many wholesale customers as we could. This was done with a press release, via emails, regularly scheduled wholesale customer meetings throughout the event, and using social media. Unfortunately, with the short timeframe not all customers were able to be reached before some outages began.
We continue to evaluate and review the events of this situation and will look for ways to learn and improve our process, should it ever be needed again.
Is there an easy way to track my energy usage?
Tracking your energy usage can easily be done by downloading NPPD’s mobile application, “NPPD On The Go!”. Download by searching “NPPD” in the Google Play or Apple App store. Then click “Register” and have your account number, service address zip code, and phone number ready. Finally complete the account information.
What are the benefits of using “NPPD On The Go!”?
Who and what is Southwest Power Pool (SPP)?
NPPD is a member of the Southwest Power Pool (SPP), a non-profit regional transmission organization in the central part of the United States. SPP is mandated by the Federal Energy Regulatory Commission to ensure customers in the region receive reliable power, adequate transmission infrastructure and competitively priced electricity. SPP and its members coordinate the flow of electricity across more than 65,000 miles of high-voltage transmission lines spanning 14 states.
Why is it important to have a diverse energy mix?
NPPD believes a diverse generation mix serves our customers best. We use wind -- when it is available. We use coal -- which is reliable and helps keep electric rates low. We use water -- one of the oldest forms of renewable energy. We use nuclear -- which offers emission-free, around-the-clock power. We use natural gas -- to complement the portfolio.
NPPD’s diverse energy generation mix helps keep our electricity reliable and keep rates as low as possible.
Public power, as it always does, answered the call to help protect the bulk electric system which serves the central portion of the country and is part of the larger Eastern Interconnect. The system requires real-time balancing of generation and load. In doing so, we also protected our customers from more detrimental, long-term blackouts.
All of NPPD’s plants were available to SPP during this emergency event. They performed as beautifully during the emergency as our NPPD teammates who worked around the clock to manage the safety, health and financial risk for our customers.
