RPU Embarks on Major Water System Overhaul Amid Growth and State Mandates
Driven by rapid population growth, stringent state regulations, and existing water quality challenges, Rochester Public Utilities is updating its Water System Master Plan, signaling a potential shift from a century of groundwater reliance.
Rochester Public Utilities (RPU) is undertaking a comprehensive update to its Water System Master Plan, a critical initiative described as one of the city's most significant pieces of planning and resource work. This extensive undertaking is spurred by rapid population growth, increasingly stringent state regulations on groundwater use, and persistent water quality concerns, potentially leading to a fundamental change in how Rochester sources and treats its drinking water.
I would argue that these two study session topics that you'll hear this afternoon are probably two of the larger pieces of planning and resource work that's happening across the city right now related to power and water supply. And I I don't mean that lightly. These are significant pieces of work that are happening.
A key driver for the updated plan is a recent permit issued by the Minnesota Department of Natural Resources (DNR) for Well 24. This permit came with fairly strict requirements, notably imposing limitations on future groundwater development.
The DNR did eventually give us a permit for well 24, but it came with some fairly strict requirements. Um, and while the wording is a little awkward, I took this almost verbatim from the notification that uh we are prohibited from constructing new water supply wells in the Jordan until we've reviewed alternative sources.
Compounding the challenge of securing new supply is the city's current water quality situation. Rochester experiences a complaint rate for water quality that is notably higher than the national average, primarily due to elevated iron and manganese levels. Unlike many comparable cities, Rochester's water treatment system currently lacks conventional filtration.
Our complaint rate uh for water quality is is twice the national average and it is because of the higher iron and manganesees levels. My point about the treatment process is we do not have conventional treatment here in Rochester where we do filtration and that frankly is quite unusual for a city of 100,000.
The prospect of shifting away from this long-standing reliance on groundwater represents a profound transition for the community. Such a change would impact not only the source and technology behind water treatment but also the financial burden on residents.
Yeah, I appreciate you guys being here, but I I guess I want to kind of highlight this is a major change for Rochester when you say we've been doing uh groundwater for a hundred years that this would be a a big change not just to the way we source our water and the technology behind it, but also probably in the cost of the water.
The city's ongoing and robust development boom is a primary factor driving the need for this comprehensive planning and system expansion. RPU needs to adapt its infrastructure to meet current and anticipated housing development rates.
This is based off of growth that has already happened and it is based off of anticipated uh system expansion that we need in this next year to two years to meet the rate of housing development that that's happening. That's an overall good news item. I would argue that we're seeing housing growth.
During discussions, questions were raised about the role of water conservation in shaping the future demand projections and planning efforts for the utility.
So, I just want to ask this question up front and I think it applies to both power and water. And I sent this email earlier and had a chance to talk with general manager McCulla, but in the charter um in the the board powers enumeration, subdivision 4 of the chapter says the board is authorized and required to restrain and prevent so far as possible any and all waste of water, electricity, heat power, and any other public utility service provided by the board. So, I guess that I I'm curious about how conservation is driving this projection and what assumptions really go into it.
To meet future demand and comply with regulatory mandates, the updated Master Plan is exploring a diverse portfolio of alternative water sources. These investigations extend beyond local aquifers to potential surface water sources such as the South Fork of the Zumbro River, Silver Lake, and Lake Zumbro. The scope of RPU's evaluation even includes the Mississippi River as a long-distance surface water option, signifying a thorough and broad assessment of all viable future supply routes.
Beyond sourcing, the master plan also addresses critical infrastructure needs essential to support the city's continued expansion. This includes extending vital water and sewer infrastructure to rapidly developing areas like Southwest Rochester and Country Club Road, as well as developing a new pressure zone and booster station for projects such as Pebble Creek. These investments are crucial to ensure reliable water delivery to a growing population.
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Notable Quotes (13)
I would argue that these two study session topics that you'll hear this afternoon are probably two of the larger pieces of planning and resource work that's happening across the city right now related to power and water supply. And I I don't mean that lightly. These are significant pieces of work that are happening.
The DNR did eventually give us a permit for well 24, but it came with some fairly strict requirements. Um, and while the wording is a little awkward, I took this almost verbatim from the notification that uh we are prohibited from constructing new water supply wells in the Jordan until we've reviewed alternative sources.
So, I just want to ask this question up front and I think it applies to both power and water. And I sent this email earlier and had a chance to talk with general manager McCulla, but in the charter um in the the board powers enumeration, subdivision 4 of the chapter says the board is authorized and required to restrain and prevent so far as possible any and all waste of water, electricity, heat power, and any other public utility service provided by the board. So, I guess that I I'm curious about how conservation is driving this projection and what assumptions really go into it.
Our complaint rate uh for water quality is is twice the national average and it is because of the higher iron and manganesees levels. My point about the treatment process is we do not have conventional treatment here in Rochester where we do filtration and that frankly is quite unusual for a city of 100,000.
Yeah, I appreciate you guys being here, but I I guess I want to kind of highlight this is a major change for Rochester when you say we've been doing uh groundwater for a hundred years that this would be a a big change not just to the way we source our water and the technology behind it, but also probably in the cost of the water.
This is based off of growth that has already happened and it is based off of anticipated uh system expansion that we need in this next year to two years to meet the rate of housing development that that's happening. That's an overall good news item. I would argue that we're seeing housing growth.
Our plan always has been a balance between the reliable capacity that we need to meet a peak day like today when the wind isn't blowing and it's very hot out um and the renewable energy that we need in order to achieve the uh 100% net renewable goal by 2030.
Mount Simon Station uh is continues to be a good news story. Um we just executed our um interconnection agreement with the uh system operator last week. Um that came in uh at about 25% of the cost we estimated. So we saved about $15 million on the interconnection because we went to a accelerated process with MYSO.
My question is about the GTI replacement component of this. Is that going to be reliance on fossil fuels there? Is it going to be renewable?
There are currently 165 wind projects waiting for that uh clearance. Um so they're they are stalled at this point but there are uh the the developers of the project as well as uh many industry groups are working on legislative solutions as well as judicial solutions and you know the communities that these are in want these wind projects.
Yeah, I appreciate seeing this and of course I see it in my other role with but I want to go back to the reliable capacity chart. Um, and just the and I again I just think just to maybe spend a minute on this to make sure what we're talking about here is like our the capacity that we need to show my so that we can come and buy. But these are not reflective of like our real usage. Our usage is dramatically lower than this.
I think a modern interpretation is exactly in line with what our programs are today. We have significant annual investment in conservation program to help find more efficient and using less electricity. We have demand response programs that will likely shave our peak today by up to six megawatts of what it otherwise would be with our thermostat program.
The energy commission at the time um actually did a project with our section 8 housing units and we went in um with the uh permission of the section 8 housing manager. We went into each of the units. there were many of them and just did simple things like replace LED bulbs, replace the water filters, etc. They were things we could do quickly while we were there and the manager evaluated some of the other needs in comm in some of the apartments as well. And I believe at the end of that study, Kevin Bright was here as our energy and person and I think he's still with Kudson. he might be able to provide a little bit more information um about the outcomes, [snorts] but I think we saved they said probably was just for that effort that we did that the energy commission did um it was something like $120 per unit of savings a year just from that change.
Ordinances & Resolutions (10)
Comprehensive plan to address Rochester's future water supply, quality, and infrastructure needs through 2065.
Strategic plan for Rochester Public Utilities to achieve 100% net renewable energy by 2030.
Authorization and requirement for the RPU board to restrain and prevent waste of public utility services.
City planning document whose assumptions were integrated into water demand projections.
Public Works study whose assumptions were integrated into water demand projections.
State statutes providing guidance on safe yield requirements for aquifers and protections for surface waters.
Regulates primary and secondary drinking water standards with MCLs and monitoring requirements.
Permit required for the Mount Simon Station (power generation facility).
Agreement with the system operator (MISO) for connecting the Mount Simon Station to the grid.
Federal permit issued by FAA and Department of Defense, currently delaying large wind projects like the Iowa project.
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