Thank you all for joining.

This is the public information meeting for the City of Peakskill flood mitigation studies.

My name is Alyssa.

I work for Barton and Lejudis, an engineering firm hired by the City of Peakskill to conduct the flood mitigation studies.

And I'm very happy to be presenting some information on the three flood mitigation studies that we are we have been doing for the city.

This meeting is occurring on September 24th at 6 30 p.m.

Eastern time, and it is being recorded for future access.

Hopefully everyone can see my screen.

We'll go through, I'll go through some background information, a little bit about the study areas of the flood mitigation studies, the modeling that was conducted, proposed projects, and what we're wrapping up currently, the next steps, and a solicitation for any feedback that you all may have for us.

So

to provide some background on uh the flood mitigation studies uh in general, um, we were tasked by the city to investigate underlying conditions in the watersheds of the city of Peakscale in particular in three particular areas.

Um we were uh hired last year to start these flood mitigation studies in these three areas, which I will go over.

And um, we have been in the process of developing a hydraulic model, developing hydrology, um, developing mitigation alternatives, and our goal is to position the city uh in a to position the city for future funding opportunities by providing these uh studies and engineering reports that we are uh wrapping up, and we'll get to the timeline in a bit.

Uh these studies, there are three of them.

They are made possible through federal risk grant funding.

Um they're uh 200,000 per contract that the city received from the federal government, and that is the funding source that the flood mitigation studies

has has been provided by.

On the left, um, there's a graphic that we have here that we did not put together, but it is available uh by the city and it shows the city of Peakscill's watersheds.

Um there are more than the three that we are looking at, but um, this just gives a holistic view of the city's watersheds and and water bodies that um are both within the city and coming from upstream of the city.

Um,

and you all likely live in the city or adjacent, so you may understand the history of flooding already.

Um there have been recurring storm events that have caused property damage and street inundation.

And on the left, this is a picture from that was provided by the city in a certain area in the city that uh unfortunately was the case during one of the storm events in the last couple of years.

So this uh flooding has been an issue in the city for for years, as you all probably know in certain areas.

So the three critical areas that were identified for these flood mitigation studies were the McGregory Brook watershed, Peakskill Hollow Creek, and the riverfront area.

And those are the three areas in which the flood mitigation studies focus on.

Uh this is showing the FEMA firm maps, so the FEMA flood maps for McGregory Brook and Peakscale Hollow Creek.

The the left image shows um the part of McGregory Brook that then connects to the right image.

And on the right here, this is the Hudson River.

Um, this is the riverfront area.

This is McGregory Brook, and this is part of Peakskill Hollow Creek.

Peakskill Hollow Creek does um flow much further upstream into other municipalities, but uh eventually flows into the Hudson River at this location right here.

And this is a better view of the watershed that I was just talking about, the Peekskill Hollow Creek watershed.

It goes very, very far up, and there's a lot of water being collected and conveyed through the streams and tributaries that eventually gets down to the area of the city of Peakskill.

Um Gregory Brook, as you can see, is a little bit smaller and generally flows through the city of Peaksville with a little a little part upstream of the city, but uh Peaksville Creek certainly collects a lot of runoff and eventually dumps into the Hudson River at the city.

There are some other creeks and brooks that you can see, but we wouldn't, we are not evaluating those as part of these flood mitigation studies.

So our study areas, as I've mentioned, um, the first is McGregory Brook, and I will note that um McGregory Brook, we're we may colloquially call contract A because it is the first one that um of the of the three.

So um if you hear me say contract A, it's the McGregory Brook area.

And so the Brook has, as you may already know, there's underground segments and above ground segments, um, but it the brook eventually outfalls into the riverfront park area um into the Hudson River at the riverfront park area.

So for the flood mitigation study, we collected topographic survey at specific segments.

We did not collect survey at the through the entire stretch of the brook, but we collected survey at certain points to help refine our hydrologic and hydraulic model.

So that was something that we wanted to make sure we had some key data points on.

We did the same for the Peakskill Hollow Creek contract or flood mitigation study,

uh,

otherwise known as contract B.

Um it's a much larger drainage area and it outfalls into the Hudson River uh through Annsville Creek.

Um and we were able to collect some data for this uh this creek as well in specific areas.

It is a very large area, so we did not track down the entire stream to get uh survey that would be very rigorous to do that.

But we were able to investigate specifically um a tributary that flows into Peakscale Hollow Creek, and we collected survey data at that tributary at Lockwood Drive in particular.

Um,

and this may be a familiar um tributary or location for the city, and certainly one of the priority projects that we um focused on for the city.

And that tributary is right here.

Lockwood Drive is this location right here.

For contract C, that is the general riverfront area.

And then that area flows in directly into the Hudson River.

Um the we did collect survey as well as geotechnical information for specific areas in the park.

And uh we'll talk a little bit more about the specific projects um that we we looked at as well as some uh very recent news that the the city has received regarding a river riverfront park stormwater improvements.

So

just to give you a little more context about the hydrologic and hydraulic modeling, um, we use NOAA Atlas 14 data uh to start our model.

Um we selected three design storms the one-year, ten-year, and a hundred year storms.