Category Archives: Drought & Conservation

Drought & Conservation, My Water

Engineering Week: Collaborative Eco-Solutions for Water & Greenway Customers

Charlotte and Mecklenburg County keep growing and growing, and because of that, more water pipes are needed to serve these growing areas. One particular area is the eastern part of Charlotte. Amy Vershel, Senior Engineering Project Manager, shares the details of this collaborative project to support the growth in our community.

Amy Vershel standing next to her Charlotte Water truck
Amy Vershel, Senior Engineering Project Manger with CLTWater

Charlotte Water (CLTWater) needed to add drinking water pipes from Idlewild Road (at East W.T. Harris Boulevard) along W.T. Harris Boulevard, Hickory Grove Road, Highland Avenue, and Plott Road to a water storage tank off of Plaza Road Extension. This project is needed to maintain water quality and reliable service for current and future customers.

During the design phase, dense housing development, other existing underground utilities, and NCDOT pavement restrictions within the proposed pipe alignment required that a portion of the alignment cross the Mecklenburg County Park and Recreation (MCPR) Reedy Creek Nature Preserve, a 1000-acre forested habitat and biodiversity center. At the same time, MCPR was engaging Nature Preserve stakeholders in an 18-month planning process to design a greenway in this same corridor.

large excavator with a hook and cable lowers a large section of black pipe into a large, long brown metal box that has been installed in a large trench cut through the red earth
Taken by project team for City of Charlotte, Charlotte Water

To avoid significant impacts to critical woodland habitat within the Nature Preserve, the team worked together to find solutions that helped align the new pipe under the greenway trail.

The goal was to avoid large trees and rock outcroppings. Seems simple, right? Not exactly. This required changes in how the water pipe was designed and installed. Some of the changes required weighing the needs of the water system project compared to minimizing impact to the Nature Preserve.

Regular meetings, field walks, alignment tweaks, and special provisions successfully mitigated impacts to both the water system and wildlife habitat. This phase of the project will be in service by the end of 2023. Exemplary collaboration and innovative thinking enabled our interagency team to deliver an enhanced public utility and recreation resource that will build equity, ecological resilience, and community to the residents of Charlotte.

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Photo taken by inspector Brody Boone

Fast Facts

Pipe: 31,300-foot long, 36-inch diameter water transmission main

Cost: $55 million

Duration 36+ months

For more information, please visit our project website : https://charlottenc.gov/Projects/Pages/WTHarrisPlottRoadWaterMainProject.aspx

Drought & Conservation, My Water

Charlotte Water Is The First Utility in the Region to Turn Waste Into Electricity

This year, Charlotte Water completed construction on a system at McAlpine Wastewater Treatment Plant that captures and converts methane gas (a byproduct of wastewater treatment) into a fuel for electricity production and useful heat.

Typically the bacteria used to break down organic materials during wastewater treatment creates their own waste in the form of methane. Up to 900 pounds of this waste is produced per day at McAlpine and is normally used for heating in boilers or burned off. The new facility to convert methane gas into something useful is called a Combined Heat and Power (CHP) facility – and Charlotte Water is the first water/wastewater utility in the state to utilize this system.

The CHP facility produces 762,480 kWh in a given month, which is enough energy to run about 846 homes.

The electricity will be added to the electric grid through a partnership with the local electric provider, Duke Energy. The excess heat will be returned to the wastewater treatment process, offsetting some of the electricity it needs to operate.

A 20-year, zero-interest loan from the state’s Clean Water State Revolving Fund (a federal Clean Water Act program that’s been in operation since the late 1980’s) financed the project. The state allowed for no-interest financing because of the project’s positive environmental impact and renewable energy generation, which made it financially feasible for the utility. The partnership means Charlotte Water won’t have to divert any of its operations budget reserved for routine system upgrades, there will be no additional costs to water customers, and the project will pay for itself in about a decade.

Drought & Conservation, My Water

Will We Run Out of water?

The short answer is no, not if we continue on a sustainable path and practice conservation. But what does that actually mean? And how do we know we won’t run out.

Let’s first look into our water supply. Then we will learn how it is managed and what you can do to ensure water is around for years and years.

City of Charlotte/Mecklenburg County withdraws our drinking water from Mountain Island Lake and Lake Norman, both part of the Catawba River and the Catawba-Wateree River Basin. This river basin supports nearly 2 million people with water for drinking, power generation, industrial processes, crop and livestock production, recreation, irrigation and more. About 25% of Duke Energy’s electricity for the Carolina’s is made in the 13 hydro stations on the river basin.

geographic map of Catawba-Wateree River Basin with several locations flagged with yellow markers and black font

So where exactly is this water going, and who uses it?

diagram of CW Reservoir System Water Balance to explain where is the water going from rain, sun, usage, irrigation, thermal power.

One of the most surprising things is that Catawba-Wateree River basin loses 204 million gallons/day from natural evaporation alone. You can imagine how much has evaporated during these hot summer months.

A 2006 Water Supply Study found maximum capacity of Catawba River Basin for water supply could be reached mid-century. Thus, a group was formed in 2007 to access and figure out a way to extend the life of our river basin.

This group that consists of Duke energy, who owns and operates the dams that manage the water and the 18 munincipalities is called the Catawba-Wateree Management Group. It is a non-profit corporation working to extend and enhance the capacity of the Catawba and Wateree Rivers to meet human needs while maintaining the ecological health of the waterway. This group was tasked with creating a Water Supply Master Plan.

The master plan identifies the current challenges associated with a limited water supply especially during periods of drought. It also identifies a series of recommendations that could extend the regional water supply capacity of the Catawba-Wateree River Basin into the next century.

Key recommendations of the plan include:

  • Increased water use efficiency
  • Lowering critical water intakes/elevations (via Duke Energy’s management of the dam system)
    • Power Plant
    • Public Water Supply
  • Raise target levels during the summer months
  • Enhance the Drought responsiveness through the Low Inflow Protocol (the protocol we use to determine what drought stage we are in and what amount of conservation is needed to ensure we have enough water for essential uses).

With implementation of the Catawba-Wateree Water Supply Master plan, we should extend the river’s capacity to sustain grown through 2100.

The good news is that total average water consumption for Charlotte Water customers is decreasing .Blue bar graph depicting total average consumption from 2007 to 2015 by the CCF or thousands

This is most likely attributed to more efficient appliances, smart irrigation and behavior changes.  This along with good infrastructure, financial and business planning will ensure that we have enough water for all current and future Mecklenburg County residents.

For more informatoin about the Water Supply Master Plan visit the Catawba-Wateree Management Group website.

Drought & Conservation, My Water

Save Water While it Gets Hotter

It’s finally summer. So we thought of five more ways to conserve water this summer. Keep these in mind while you keep cool on these hot days.

  1. Chuck the melted ice from your lunch to-go cup in a desk plant or house plant. [Not the soda, the melted ice. A little bit of sweet tea will be okay]
  2. Temporarily move houseplants outside in the rain. Water from the sky is free!
  3. Do your dish washing and laundry during off-peak hours [and only when the dishwasher is full. Grab the doggie food bowls to fill up that last empty space!.
  4. Water your lawn slowly. It’s really difficult to get water to soak into soils in Charlotte. When you start to notice water running off the lawn or pooling, it’s time to stop the sprinkler and give the soil time to catch up.
  5. Plant more trees! And then more trees. Eventually you’ll have less lawn. Turfgrass is not native to Charlotte. Which means it needs water, usually more than provided by Mother Nature. Converting lawn to native trees and shrubs cuts back the need for outdoor watering substantially. And don’t forget the mulch!