Floodplains

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Description:


Floodplains in Newton, Massachusetts as defined in Newton's Floodplain Ordinance of 2010. The ordinance defines floodways as the 100 year floodplain as defined in FEMA's Flood Insurance Rate (FIRM) Maps. These correspond to Zone AE on those maps. In addition, the ordinance lists most streams, not studied on the FIRM's by name and established as 30 foot corridors or buffers around each one. LiDAR elevations were used to more accurately depict the boundaries where listed by elevation in the ordinance.


Features and Attributes:

Polygons represent the extent of flood plains. Attributes indicate type of flood plain or wetland.

Name

Alias

Description

Data Type

Width

ClassNum

ClassNum

References a missing lookup table

Integer

5

Feature

Feature

Type of wetland-lowland, water, etc

Text

10

***valid values***

CULVERT

LOWLAND

OPEN WATER

STREAM

OrdinanceCat

Ordinance Category

Floodplain Ordinance Category

Integer

5

***valid values***

1

Floodplain Watersheds

2

Floodways

3

Open brook or stream watersheds

4

Wetlands

5

Ponds

OrdSection

Ordinance Section

Floodplain Ordinance Section

Text

12

 

Last Updated:            April, 2018


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