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Floodplain Management > Using NFIP Studies And Maps > Flashcards

Using NFIP Studies And Maps Flashcards

1
Q

What is the most important use of the FIS and Floodway Maps and or FIRM?

A

To determine if a site is in the SFHA, a V zone and/ or a Floodway and to determine the BFE

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2
Q

What is the suffix letter after the community identification code on a map panel?

A

It designates the most recent revision. A town will have multiple map panels, and they can have different revisions, and different effective dates due to revisions that do not affect the whole community

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3
Q

In a floodway data table, what is the significance of the regulatory base Flood Elevation?

A

Equivalent to the 100- year base Flood Elevation.or regulatory Elevation

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4
Q

Coastal regulatory base flood elevations include the increase due to wave height. What source should you
determine the BFE from, the FIS or the FIRM?

A

Use the FIRM, but add 0.4 feet because the elevations are rounded to the nearest foot, and better to be conservative.

The Stillwater Elevation in the FIS doesn’t account for the wave increase in Elevation

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5
Q

For lakes and reservoirs should you use the FIS or FIRM for BFE?

A

Use the FIS Stillwater table. Not impacted by wave height inland.

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6
Q

What is the most accurate source for riverine data?

A

Most accurate is the Floodway data table, next is the flood profile graphs And least accurate is the FIRMs.

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7
Q

What is the only source of Elevation data for AO and AH zones?

A

The FIRMS - If depth indicated it is the feet above the land surface, or feet above grade of a building.

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8
Q

What if the SFHA boundary on the map has a different elevation than the BFE, can you use the exact topo?

A

The BFE takes precedence. The bank must use the FIRM and cannot make on-site interpolations, but may recommend submitting a request for a Letter of Map Revision based on Fill or Letter of Map Amendment.

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9
Q

Can the town correct discrepancies in the FIRM?

A

Only FEMA can amend or correct the Maps, the town may submit a request for a LOMR-Fill or LOMA

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10
Q

What does an asterisk mean after the map panel number, as shown on the Map Index.?

A

It means the panel was not printed due to either no flood hazard or the entire area is in one flood hazard zone.

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11
Q

How many feet are in a mile for converting data

A

5280 feet in one mile

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12
Q

On coastal and lake floodplains the BFE for AE zones on the FIRMS are whole numbers - can you interpolate data?

A

No, do not interpolate, the same applies to AH zones with whole number BFE.

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13
Q

On riverine areas the BFE is near the wavy line, can you interpolate between elevations?

A

Yes, it is fine to do so for riverine areas, but wherever available use the flood profile first, if in doubt choose the higher elevation to ensure protection from flooding.

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14
Q

How do you interpret the depth listed in an AO area?

A

The depth is measure above ground level, or above the grade of any adjacent building.

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15
Q

When measuring distances on the FIRM or interpreting land distances, how should you measure from roadways.?

A

Measure from the center-line on either the map or the ground.

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16
Q

If a building site, proposed grading, fill, bridge or other obstruction is located in the floodway, what regulations apply?

A

The floodway provisions of the Town NFIP ordinance

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17
Q

If a site is clearly outside of the SFHA what regulations apply?

A

None, unless the site adjoins the SFHA and surveyed ground elevations are below the BFE.

18
Q

If there is any doubt if the site is in or out of the SFHA, what additional information is needed to make the determination?

A

Professional survey of ground elevation and lowest floor elevation. Needed to file a LOMR-Fill or LOMA.

19
Q

Where can an individual get the most recent FIRMs and FIS .

A

From Town or City Hall, or through the FEMA map Servicing Center in MD.

20
Q

Why should the Town or City retain old versions of the FIRM and FIS, as a historical record.

A

To protect homeowners who have purchased flood insurance using the older data, they are grandfathered and may need to later prove that the old map elevations were used to determine policy rates.

21
Q

What are the reasons that maps are revised?

A 
correct non-flood related features
include better ground elevation data
reflect changes in ground elevation in the floodplain due to fill
revise or submit new flood data
reflect a flood control project
22
Q

If there are significant physical changes affecting flooding conditions, what must the Town do?

A

No more than six-months after data becomes available, the community must notify FEMA by submitting technical or scientific data.

23
Q

How do map changes affect Lenders?

A

Lenders enforce the mandatory flood insurance purchase requirements.

24
Q

How do map changes affect Communities?

A

Communities enforce the floodplain management regulations.

25
Q

What are the 4 types of Map changes?

A

Restudy- affects entire community
Limited Map Maintenance- small scale
Map Revision- multiple reasons
Map Amendment- to remove an area of high ground

26
Q

list some reasons why a community might request a letter of Map Revision LOMR

A

scientific based challenge to flood elevations
new flood data available
fill was place in floodplain
new data after flood control project completed
change in the floodplain or floodway boundary

27
Q

How is an amendment different from a restudy, map revision or limited map maintenance.

A

An amendment doesn’t challenge the FIRM or FIS, it simply removes buidlings or certain areas from the SFHA because they are higher than the base flood elevation.

28
Q

How does FEMA make flood map changes from a restudy or limited map maintenance project.

A

Changes to map are made and new copes are published if it effects a large area. The new maps will have a new effective date.

29
Q

What are the two methods for making flood map changes.

A

Change the map and reprint copies, or issues a letter that describes the map changes. Letter of Map Change, or Letter of Map Revision

30
Q

What is a LOMC or letter of Map Change

A

Official letter amending or revising the NFIP map, it is a public record that must be maintained and noted on the community master plan and filed by panel number in an accessible location.

31
Q

Can an NFIP map be changed based on a proposed project or a vacant lot?

A

No, but a Conditional Letter of Map Revision (CLOMR) or CLORM-Fill may be requested based on a proposed plan. If a vacant lot may request a Conditional Letter of Map Amendment. When the project is completed it will qualify for a LORM or a LORM-F or a LOMA to officially change the map.

32
Q

How does the community request map changes

A

Contact regional FEMA office or State NFIP coordiator, for a restudy or limitied map maintenance. For a revision or amendment, file the appropriate FEMA forms.

33
Q

When do you file an MT-1

A

Form for a Letter of Map Amendment, conditional or regular.

or LOMA, LOMA-Fill, CLOMA, or CLOMA-Fill

34
Q

When do you file an MT-2

A

For a Letter of Map Revision, LOMR, or CLOMR

35
Q

When should you use an MT-EZ

A

For a single lot Letter of Map Amendment (LOMA) or single lot LOMR-fill.

36
Q

What data is needed to file an MT-EZ

A

Professional survey to certify the elevation data and obtain a FEMA Elevation Certificate with lowest elevation on the parcel, lowest grade adjacent to the structure and lowest floor elevation.

37
Q

Suppose the basement is below the BFE, but the buidling was built on fill and is above the BFE, what is the consequence for a requested LOMA or LOMR?

A

LOMA or LOMR cannot be issued.

38
Q

Can a bank require flood insurance even after a property is removed from the SFHA?

A

YEs, up to the lender, may require the insurance to protect its investment in the property. Florida, all properties need flood insurance in shaded Zone X or Zone B.

39
Q

Can filled, unimproved land be removed from the SFHA?

A

Yes, but only on the basis of the filled elevation if no construction has begun when the request is submitted.

40
Q

What obligation does the community have for properties that are removed from the floodplain based on fill?

A

community must determine that any existing or proposed structure will be reasonably safe from flooding, or the LOMR-F will not be processed.

41
Q

Where can a community find more guidance on assuring that a structure built on fill will be reasonably safe from flooding?

A

Technical Bulletin 10-01, Ensuring that Structures Built on Fill in or near SFHA’s are Reasonably Safe from Flooding.

Floodplain Management (11 decks)

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