HomeMy WebLinkAboutCorrespondence Flood map discrepancy- 25 Sagamore Rd, YarmouthAttention!: This email originates outside of the organization. Do not open attachments or
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From:Shannon Hulst
To:DiRienzo, Brittany; Shelly McComb
Cc:Jerolimo, Joseph
Subject:RE: Flood map discrepancy- 25 Sagamore Rd, Yarmouth
Date:Wednesday, May 14, 2025 5:25:22 PM
Attachments:image001.png
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Hi Brittany,
There are a few situations that can cause this. Sometimes the flood map is just wrong,
sometimes it’s how the flood zone is delineated, and sometimes it’s because ground
conditions were changed. This is a pretty straightforward delineation that should be based
on ground elevation, so we can eliminate that presuming a professional land surveyor did
the delineation. So either they added fill or the map is wrong. If fill has been added, they
need to go through the process of pursuing a Letter of Map Change based on fill. If not,
they should go through the Letter of Map Amendment process to have FEMA confirm that
the property is not located in the floodplain. Until FEMA issues this letter, the property is still
considered to officially be in the floodplain. When the flood zone line on the map and a
surveyed delineated line are close, I go with the surveyed delineated line. But when they’re
not, I would go through the official process to have FEMA approve it.
That being said, it looks like the flood zone line still clips the house, meaning they have to
build to floodplain regulations anyway. If your only concern is for the structure, I would
consider having your board NOT approve the flood zone line but allow it to proceed since
the structure is still considered to be in the flood zone. I’m on the Dennis ConCom and
we’ve done that a few times when the outcome of an official delineation doesn’t actually
make a difference for the outcome of the project. But if there are other concerns based on
the flood zone delineation, I’d go the FEMA approval route.
Does that make sense? I’m happy to have a call about it if that’s easier. I’m available the
next two days and then away at a conference next week.
Shannon
Shannon Hulst, CFM (she/her)
Deputy Director | Cape Cod Cooperative Extension
Floodplain & CRS Specialist | Cape Cod Cooperative Extension & Woods Hole Oceanographic
Institution Sea Grant
Email shannon.hulst@capecod.gov | Office (508) 375-6952 | Cell/Text (774) 559-3599
From: DiRienzo, Brittany <BDiRienzo@yarmouth.ma.us>
Sent: Wednesday, May 14, 2025 4:01 PM
To: Shelly McComb <shelly.mccomb@capecod.gov>; Shannon Hulst <shannon.hulst@capecod.gov>
Cc: Jerolimo, Joseph <JJerolimo@yarmouth.ma.us>
Subject: Flood map discrepancy- 25 Sagamore Rd, Yarmouth
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Hello,
We received an NOI and there is a discrepancy between the site survey and the FEMA
flood map. The commission will have to approve the conditions and flood zone line, is the
surveyed condition more accurate than the maps? Any guidance you can provide would be
appreciated. This item won’t be on the agenda until June 5, 2025.
https://hazards-fema.maps.arcgis.com/apps/webappviewer/index.html?
id=8b0adb51996444d4879338b5529aa9cd&extent=-70.27696017653531,41.63974480706
217,-70.23541812331267,41.65577893183897
Thank you!
Brittany DiRienzo
Conservation Administrator
Town of Yarmouth
bdirienzo@yarmouth.ma.us
508-398-2231 x1288
Conservation Website