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Recording in progress.

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All right. Get 6.30 p.m. on Tuesday, September 15th. We'll go and call to order the city of

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the box out of public works and planning and zoning committee meeting. Can we get a roll

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call please? Yes, Schubert. Here. Here. Here. Here. Item three, approve the order of

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business. I'll make a motion to approve the order of business as presented.

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Second. Much by sugar. Second by Thomas to approve. All in favor. Aye.

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Opposed? Most you carry. Item 4 approved previous meeting minutes.

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4A. Public works and planning and zoning committee meeting minutes for September

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1st, 2026. I'll move to approve the September 1st public works and planning and

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zoning committee meeting minutes as presented. Second. Much by Thomas. Second by

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sugar to approve. All in favor. Aye. Opposed? Most you carry. Item 5. Unfinished

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business there is nothing there we'll move on to number six new business six a

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ordinance number 803 in ordinance to revise the zoning designation of the

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property that is legally described as drainage lot one a block three of

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Creek side-of-state subdivision in section 30 Township 2 North Range 90s Black

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Hillsbury and Box Outer Pennington County South Dakota if approved we'll go to

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tonight's counseling. Well I've hadn't planned so in director so this

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application has been a little confusing because I've been asked by many people

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what is going on with this.

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So that outlined lot in the white dotted area is being asked to be rezoned the next item

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that we have as a minor plat to create this lot.

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It is being rezoned because the three parcels to the east are already zoned are three and

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they plan to do a minor plat to combine those lots and create town homes on them.

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They were having a hard time where their drainage would go, so they approached the

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previous or old Sentinel Federal Credit Union building with that area to the north to split that off to have it for a drainage lot.

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Any questions comments?

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I'll

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make a motion to approve board an administrative three as presented and forward to tonight's city council meeting with the recommendation of approval.

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Second.

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much by super second by tell us to approve any further discussion all the favor I

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Opposed most she carries six B minor plaque create side of states lot C-1A and drainage lot one of block three if approved

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We'll go to tonight's council to both hadn't plans on any director

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So this is the minor plot to split that lot to create the existence at no lot and that drainage lot to the north

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Thank you very much

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I'll move to prove minor plan for lots

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C-1-A and drainage of block one of block three of Creek Cytocate subdivision and

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forth to tonight's City Council moving with the recommendation approval.

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Much by Sadler, second by sugar to approve any further discussion.

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All in favor?

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Aye.

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Opposed?

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Motion carries.

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6-C, change order two, final parking lot construction for felt on the community park, project number 2-6-0-0-2, J&J asphalt company.

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Thank you, Mr. Chairman, Scott Lang, City Engineer, this is our final change order for the parking lots.

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We did spend a little extra money on some gravel by helps palm but overall we're well under our proposed budget for the year

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I think if you've looked at those those projects look pretty good and I recommend we approve the final change order so we can

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Create a final pay-up and close the project

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project number two six zero zero two as presented with J&J asphalt company with an

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increase for seven thousand seven hundred dollars and a total contract amount of

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188,679 dollars and forward to a future city council meeting with

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recommendation of approval. Second. Motion by Super. Second by

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Tows to approve any further discussion. All in favor? Aye. Opposed? Motion carries.

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Six D, accept easement for Black Hills Federal Credit Union sidewalk.

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Thank you, Mr. Chairman, Scott Lang, City Engineer, it's filling in one of those little pieces of missing sidewalk along Villa.

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Now, Villa is a narrow road, I think it's 50 feet, doesn't have the standard 66 foot.

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So the sidewalk is actually going on private property, so we get an easement to cover it.

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Expect Villa, or excuse me, to Black Hills Federal Credit Union to build that yet this fall.

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So this is accepting the easement, same thing we did for Circle K.

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Yes sir, thank you very much.

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I'm going to motion to accept sidewalk easement as presented with Black Hills Federal

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Care Union and forward to the future city council meeting with the recommendation.

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Second. Motion by town, second by Subaru, to approve any further discussion. All in favor? Aye. Aye. Opposed? Motion carries. Item 7. Information, items, we have a presentation. Now the sanitary sewer study results by DGR, DGR engineer. Thank you, Mr. Chairman, Scott Lang, city engineer. We've DGR has been our consultant here on sewer projects in this last year, the previous year we put the model together. So this year, Dana and Dan did a study.

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using that model to just find any weak points in our system.

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And that's what the study does in data series to give you a quick update of that.

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Yeah, thanks for having us.

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Scott mentioned I'm Dana Foreman with the DGR engineering.

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This is really the end result of the sewer modeling study that we started with last year,

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and we'll go through a few things here.

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So the study scope was really to provide a comprehensive look at the sanitary sewer system

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really evaluating the existing system, the future demands that we placed on that existing

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system, identify any deficiencies that the system might have then from those deficiencies

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look at alternatives, recommendations for long-term system improvement planning and then short-term

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capital improvements. What are the put of those recommendations going to cost the city going forward.

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The existing system that the city has, it's made up of 325,500 linear feet of sewer main

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plus the collection. Those phases range from 8 inch to 36 inch diameter means

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mains are primarily PVC. There's a little bit of

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of clay pipe up in the system, but it's primarily PVC.

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There's two trunk mains.

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We consider trunk mains really anything

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that's over about a 12 inch diameter size.

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The 36 inch that is in your system

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now would be considered a trunk main.

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In the city system, it's really highway 1416

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from Westgate all the way to the wastewater plant

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is a trunk main.

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and then there's what we call the elsewhere. The trunk that goes takes the base sewer about the golf course area kind of runs across and then goes south of the interstate and then connects with a wastewater plant.

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The city has one lift station that's out in Veterans Park and then all of the wastewater is treated at the city to regional wastewater treatment facility.

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that the city shares those costs with with city on those on those flows. Right now that's a 50-50

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split on flow allocation. There's some nuances within those splits but it's basically a 50-50 split

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so it's 50 base 50 cities how that's set up in that today's agreement.

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This map's going to be

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tough to see but in in in greater scale it really shows you how far the city

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serves serves the area it serves all way over to exit 61 on the west on the

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left side of the screen and then I'll wait out to the wastewater plant on the

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very far

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a lot of geography a lot of means that make up that 325,000 plus

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It's a lot to take care of for staff and then

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as part of, so we know the existing flows

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today because those are monitored and metered but then we looked at what is 20 years from

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now look like, so similar to the water study that we did in some other studies at the city's

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undertaking, we used a 2.5% row 3 and in 2045 that's about 25,000 people, that's what

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that

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we looked at the usage demands and right now the city has about 0.62 million gallons per day

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of wastewater that goes to the wastewater plant. When we look at projections in 2045 we're looking

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at about 1.6 million gallons average day even though the population is about doubling the flows

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don't quite double we're assuming more than that and that's just we're using some state

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averages on those future flows and it's a little conservative so that's a good thing.

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Right now peak days about 1.4 million gallon per day and then 2045 we're looking at 3.7 million

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and go on for days.

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As part of the analysis, we developed the existing condition model last year, and then this year we use those 2045 future flows in the model. The model is a dynamic model where we actually taken into account the timing of, say, the water from this area. It takes a certain amount of time to get to across the interstate. We take that all into account rather than it's saying A plus B plus C.

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see the dynamic models more accurate and make us so we don't oversize things.

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So then this year we created that future model that looked at what the future flows

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does to the current system.

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Waste water treatment allocation.

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We looked at the existing flows, 2045 future flows, BOD, which is biological oxygen demand,

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and TSS and ammonia.

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Those are things that are programmed

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into your guys' agreement with Cedida as part of that usage.

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And those are typical wastewater treatment type metrics.

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I think I've lost my mind.

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Is it not working?

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No.

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There we go.

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I'll do it.

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So after we did the analysis, we looked at deficiencies.

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So what concerns are out there today with existing flows,

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what concerns are we going to be out there

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with the future flows and what we found and this is a really short list which is

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fantastic for the city and then when we work through it with city staff we're

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just really happy that there isn't a lot of glaring deficiencies out there but

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what we found was within the collection system there's a couple

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a couple of constructions and one construction is on Prairie Road where the

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Veterans Listation when it discharges into the Prairie Road sewer main, that

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sewer main becomes that capacity during existing time and then of course

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future it really is over capacity. So that's one and then the other one is what we

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called the 1416 trunk from Cottonwood to the plant, which is phase two, is what we kind

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of call that.

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And then really continue to monitor and repair infiltration and inflow.

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So what we see from meter flow data was during real peak rain events like 2019, we guys had

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a lot of rain.

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the flow amounts from the really jumped up and that's just because there's open

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clean outs and open manhole maybe or something that staffs done a great job

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identifying and fixing a lot of those and it's just a it's a continuous thing

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to always be working on. Deficiencies on the wastewater treatment facility, we

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didn't have any that has a really good rating from the state and currently is

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operating as it should.

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So from there, what recommendations and priorities did we come

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up with to repair those deficiencies? With the collection system, what we came up with

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is rather than have waste water go all the waste water go down prairie road and then it

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comes back to tower. We looked at actually rerouting it and just sending it down tower because

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the city's arty program on a tower road reconstruct. So let's just send the waste water down tower road.

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And then another one, the 1416 up sizing from Cottonwood to the waste water plant.

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That's something that the city's already been programming as well.

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So really those two things, city staff are already on top of and we just validated it.

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So, and then continue with I and I improvement and that's just really a yearly, yearly type maintenance program to get into.

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On the wastewater treatment facility, about 2045, that 20 years out, the city will be bumping up pretty close to their allocation amounts.

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So we just, we just said continue to monitor as your population increases to really just check back in and

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see how it goes flows, check back into your population as, you know, five years, 10 years down the road.

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I do have some exhibits here. This exhibit, this shows the tar road rerout.

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So right now, as the word comes here, it goes down very well.

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If the car was reconstructed, that's just...

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Send a lot of that sewer down tower and that way, that way, this, you can stand a glass over here. It's a really great solution. City staff was a big part of coming up with that idea.

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And then here's the 14, 16 trunk up sizing from cottonwood for planting, which is another one that City staff has already programmed.

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That's all I have. Any questions? I like to add a couple things. First of all,

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I think it's really just to note, our system's in really good shape.

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Now it's a really good shape for a couple of reasons.

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One, the city's made some heck of an investment already in sewer capacity.

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14, 16 phase one, Westgate, Cheyenne Boulevard, all of those give us

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the ability to grow that we wouldn't have without that previous investment.

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We've got 14, 16 phase two program, so we should be in good shape there.

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And yes, Josh and Public Works came up with a good solution to very rough that along tower.

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That's a great simple solution that we can work into the plant.

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The other thing I'd like to say as far as the capacity of the plant, it's 3 million gallons, right?

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We split half with the city, half with the base, I don't think the base is ever going to get to 1.5 million gallons.

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I think as we grow up out to 2045, there's like Dana said, population review and allocation

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shift is probably going to be the solution as opposed to expanding the plant.

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We might have to expand the plant a little bit, but it's not for sure and then you'll

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know in 15-ish years if that indeed would be the case.

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And then last thing I'm going to thank, Dan and Dana, I just going back to the model,

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Going back to this report, I'm really pleased with the data we got and how we can use that.

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This is going to be a facility plan that we're going to send to the DNR.

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If for some reason we've got to go pursue some money, we've got this done already.

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So I do want to thank these two guys.

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One of the real big benefits out of the model going forward is anytime that a new business,

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that's a large user or big development comes to town city staff I have an ability to engage us to you know

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let's let's check the model verify those sewer pipes that are going to go in there and what

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of those need to be and so the going for is a lot of benefits on that model. That's why you will see an

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on call for sewer services as needed each year. Thank you very much. I appreciate that. All right moving on to number eight

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A adjournment, I would entertain the motion.

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I'll make most of you adjourn September 15th, 2026 public works in Planning and Zoning Committee meeting at 6.47pm.

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So, much by teller, second by super to adjourn all the favor.

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Aye.

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Opposed?

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We are adjourned.

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Recording stopped.