20250402
15534600
1.0
FALSE
002
USACE_DAMS_MAR25
64839.465300
792864.964400
168193.562400
779866.766700
1
Projected
GCS_North_American_1983_HARN
Linear Unit: Meter (1.000000)
NAD_1983_HARN_Florida_GDL_Albers
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.4.0'><WKT>PROJCS["NAD_1983_HARN_Florida_GDL_Albers",GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.0],PARAMETER["Standard_Parallel_1",24.0],PARAMETER["Standard_Parallel_2",31.5],PARAMETER["Latitude_Of_Origin",24.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3087]]</WKT><XOrigin>-19550100</XOrigin><YOrigin>-7526400</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>3087</WKID><LatestWKID>3087</LatestWKID></ProjectedCoordinateSystem>
20250409
13010900
20250409
13010900
150000000
5000
FGDC
dataset
Brian VanBockern
USACE - Army Geospatial Center
Branch Chief, Data Management Dam and Levee Safety
Contact us at NID@usace.army.mil
441 G Street NW
Washington
DC
20314-1000
US
VanBockern, Brian D CIV USARMY CENWK (USA) <Brian.D.Vanbockern@usace.army.mil>
Need more help?
Contact us at NID@usace.army.mil
U.S. Army Corps of Engineers - Civil Works Business Intelligence Geospatial Portal
National Inventory of Dams Public Service
https://geospatial.sec.usace.army.mil/dls/rest/services
20250409
ArcGIS Metadata
1.0
0.000
Florida Geographic Data Library (FGDL)
Jonathan and Melanie Antevy Hall
1480 Inner Road, Room 431
PO Box 115706
Gainesville
FL
32611-5706
US
https://fgdl.org/info/contact/
None
DOWNLOADABLE DATA
https://www.fgdl.org/
Enterprise Geodatabase Feature Class
National Inventory of Dams (NID) in Florida - 2025
2025-03-14T00:00:00
U.S. Army Corps of Engineers
441 G Street NW
Washington
DC
20314-1000
NID@USACE.ARMY.MIL
US
NID@USACE.ARMY.MIL
Email us at NID@USACE.ARMY.MIL
U.S. Army Corps of Engineers
vector digital data
State of Florida
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset contains the State of Florida subset of the 2025 National Inventory of Dams (NID). The NID is a congressionally authorized database, which documents dams in the U.S. and its territories. The NID is maintained and published by USACE, in cooperation with the Association of State Dam Safety Officials (ASDSO), the states and territories, and federal dam-regulating agencies. The database contains information about the dam’s location, size, purpose, type, last inspection, regulatory facts, and other technical data. Prior to 2021, the U.S. Army Corps of Engineers (USACE) updated the NID, annually, with information provided by states and federal dam regulating agencies across the nation. Starting in November 2021, state and federal dam safety regulatory entities can enter data directly and as often as they like or provide bulk data updates directly to USACE. This change provides flexibility and supports access to real-time, up-to-date information for the more than 91,000 dams in the NID. The dams in the NID are owned, operated, or regulated by a variety of entities. About 75 percent of the dams in the NID are regulated by the state dam safety offices, and almost 70 percent of the entire inventory is privately-owned dams. The federal government owns or regulates five percent of dams in the NID, which includes approximately 55 percent of the tallest dams. Dams located in Florida that are listed in the NID meet at least one of the following four criteria: 1) High Hazard Potential dams - Loss of human life is likely if the dam fails. 2) Significant Hazard Potential dams - No probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities or other impacts. 3) The dam is equal to or exceeds 25 feet in height and exceeds 15 acre-feet in storage. 4) The dam exceeds six feet in height and is equal to or exceeds 50 acre-feet in storage. USACE manages the NID but does not own most of the dams in the NID. Operation, maintenance, and repair of these dams is the responsibility of each dam owner. Please contact the respective state or federal regulatory authority for the most up-to-date information. This layer is an update to the FGDL layer USACE_DAMS_2019.</SPAN></P></DIV></DIV></DIV>
This dataset contains the State of Florida subset of the 2025 National Inventory of Dams (NID). The NID is a congressionally authorized database, which documents dams in the U.S. and its territories. The NID is maintained and published by USACE, in cooperation with the Association of State Dam Safety Officials (ASDSO), the states and territories, and federal dam-regulating agencies. The database contains information about the dam’s location, size, purpose, type, last inspection, regulatory facts, and other technical data. Dams located in Florida that are listed in the NID meet at least one of the following four criteria: 1) High Hazard Potential dams - Loss of human life is likely if the dam fails. 2) Significant Hazard Potential dams - No probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities or other impacts. 3) The dam is equal to or exceeds 25 feet in height and exceeds 15 acre-feet in storage. 4) The dam exceeds six feet in height and is equal to or exceeds 50 acre-feet in storage. This layer is an update to the FGDL layer USACE_DAMS_2019.
U.S. Army Corps of Engineers - National Inventory of Dams (NID)
https://nid.sec.usace.army.mil/#/
U.S. Army Corps of Engineers - Civil Works Business Intelligence Geospatial Portal
National Inventory of Dams Public Service
https://geospatial.sec.usace.army.mil/arcgis/home/item.html?id=73e34e4d79b84555864c0bf615c680fc
https://geospatial.sec.usace.army.mil/dls/rest/services/NID/National_Inventory_of_Dams_Public_Service/FeatureServer
Florida
2025
ISO 9115 Topic Category
inland Waters
structure
Dams
Structure
National Inventory of Dams
NID
inland Waters
structure
Dams
Structure
Florida
National Inventory of Dams
2025
NID
USACE National Dam Inventory Homepage: https://nid.sec.usace.army.mil
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
-87.503671
-79.884637
25.270512
31.027171
0.000000
0.000000
State of Florida
publication date
1975-01-01T00:00:00
2025-03-14T00:00:00
0.000000
0.000000
FDEP: Florida Dam Safety Program
https://floridadep.gov/water/water/content/florida-dam-safety-program
Association of State Dam Safety Officials
https://damsafety.org/florida
Florida Contact:
Tracy Woods P.G.
State Dam Safety Officer
Division of Water Resource Management
Engineering, Hydrology, & Geology Program
2600 Blair Stone Road, M.S. 3595
Tallahassee, Florida 32399
Email: Tracy.Woods@floridadep.gov
Tel: (850) 245-7530
1
-87.511249
-79.884637
31.027171
25.461123
0.000000
0.000000
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None</SPAN></P></DIV></DIV></DIV>
The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist. Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. The University of Florida GeoPlan Center shall not be liable for any damages suffered as a result of using, modifying, contributing or distributing the materials. A note about data scale: Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation.
Brian VanBockern
USACE - Army Geospatial Center
Branch Chief, Data Management Dam and Levee Safety
Contact us at NID@usace.army.mil
441 G Street NW
Washington
DC
20314-1000
US
VanBockern, Brian D CIV USARMY CENWK (USA) <Brian.D.Vanbockern@usace.army.mil>
Need more help?
Contact us at NID@usace.army.mil
U.S. Army Corps of Engineers - Civil Works Business Intelligence Geospatial Portal
National Inventory of Dams Public Service
https://geospatial.sec.usace.army.mil/dls/rest/services
Brian VanBockern
This data is provided 'as is'. GeoPlan relied on the integrity of the original data layer's topology
Spatial and Attribute Information
NID Updated on March 14th, 2025.
U.S. Army Corps of Engineers - Civil Works Business Intelligence Geospatial Portal
National Inventory of Dams Public Service
https://geospatial.sec.usace.army.mil/arcgis/home/item.html?id=73e34e4d79b84555864c0bf615c680fc
2025-03-14T00:00:00
USCAE
Brian VanBockern
USACE - Army Geospatial Center
Branch Chief, Data Management Dam and Levee Safety
Contact us at NID@usace.army.mil
441 G Street NW
Washington
DC
20314-1000
US
VanBockern, Brian D CIV USARMY CENWK (USA) <Brian.D.Vanbockern@usace.army.mil>
Need more help?
Contact us at NID@usace.army.mil
U.S. Army Corps of Engineers - Civil Works Business Intelligence Geospatial Portal
National Inventory of Dams Public Service
https://geospatial.sec.usace.army.mil/dls/rest/services
Brian VanBockern
GeoPlan downloaded the Florida subset of the National Inventory of Dams (NID) from the following U.S. Army Corps of Engineers (USACE) website on April 1st 2025. Please Note: This dataset is a snapshot of a dynamic database (20250314) and the information was downloaded on 20250401.
https://nid.sec.usace.army.mil/#/
U.S. Army Corps of Engineers - Civil Works Business Intelligence Geospatial Portal
National Inventory of Dams Public Service
https://geospatial.sec.usace.army.mil/arcgis/home/item.html?id=73e34e4d79b84555864c0bf615c680fc
https://geospatial.sec.usace.army.mil/dls/rest/services/NID/National_Inventory_of_Dams_Public_Service/FeatureServer
Added the Server to ArcGIS Pro:
Insert->Connections->Server->New ArcGIS Server
https://geospatial.sec.usace.army.mil/dls/rest/services
Added the National Inventory of Dams Feature Service to the Map and used the Export Features Tool.
National Inventory of Dams
--------------------------
Original Projection Information:
Geographic coordinate reference ⇔ GCS_North_American_1983
Coordinate reference details ⇔
GeographicCoordinateSystem
WKID 4269
XOrigin -400
YOrigin -400
XYScale 999999999.99999988
ZOrigin -100000
ZScale 10000
MOrigin -100000
MScale 10000
XYTolerance 8.98315284119521e-09
ZTolerance 0.001
MTolerance 0.001
HighPrecision true
LeftLongitude -180
LatestWKID 4269
WKT GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG",4269]]
Reference system identifier
Value ⇔ 4269
Codespace ⇔ EPSG
Version ⇔ 6.5(3.0.1)
--------------------------
Projected to NAD_1983_HARN_Florida_GDL_Albers (3087) using the following Transformation:
NAD_1983_To_HARN_Florida
During the QA/QC process the following tasks were undertaken:
- Uppercased all records in the table except any URL fields.
- Added and populated MGRS fields.
- A DESCRIPT field was added based on the following:
!NAME! + " [" + !NIDID! + "]"
- A FGDLAQDATE field was added based on date downloaded from source.
- Renamed file to USACE_DAMS_MAR25.
2025-04-01T00:00:00
GeoPlan
Kate Norris
University of Florida GeoPlan Center
Geospatial Data Manager & Senior GIS Specialist
www.fgdl.org
131 Jonathan and Melanie Antevy Hall | PO Box 115706
Gainesville
FL
32611-5706
US
data@fgdl.org
Kate Norris
Kate Norris
This data is provided 'as is'. GeoPlan relied on the integrity of the original data layer's topology.
This data is provided 'as is' by GeoPlan and is complete to our knowledge.
GeoPlan relied on the integrity of the attribute information within the original data.
This data is provided 'as is' and its horizontal positional accuracy has not been verified by GeoPlan.
This data is provided 'as is' and its vertical positional accuracy has not been verified by GeoPlan.
0
1077
EPSG
6.12(9.2.0)
USACE_DAMS_MAR25
USACE_DAMS_MAR25
USACE
Feature Class
1077
OBJECTID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
OBJECTID
OID
4
10
0
Shape
Feature geometry.
ESRI
Coordinates defining the features.
SHAPE
Geometry
8
0
0
NIDID
The official NID identification number for the dam, known formerly as the National ID. This is a required
field, and must have an entry for each dam included in the NID. The State Dam Safety Offices assign and
maintain the NID IDs for all dams, regardless of ownership. The first two characters of the identity are the
two-letter state abbreviation, based on the location of the dam. The last five to six characters of the identity are
a unique number (AB#####); although States are allowed to use alphanumeric combinations in the characters
that follow the state abbreviation.
USACE
NIDID
String
8
0
0
OTHER_STRUCTURE_ID
OTHER_STRUCTURE_ID
String
100
0
0
The identification number (S001, S002, etc.) of a separate structure, such as a saddle dam or dike, associated
with the dam project. This field applies only to saddle dams, dikes or other separate structures associated with
a primary dam. This field is blank for all other dams.
USACE
FEDERAL_ID
FEDERAL_ID
String
100
0
0
The unique identifier for each dam record. For saddle dams, dikes or other separate structures associated with
the dam project, it is a concatenation of the primary dam’s NID ID and the Other Structure ID. For all other
dams, it is the NID ID.
USACE
DATA_UPDATED
DATA_UPDATED
Date
8
0
0
Data Updated Date
USACE
NAME
NAME
String
255
0
0
The official name of the dam. No abbreviations unless the abbreviation is a part of the official name. For dams
that do not have an official name, the popular name is used.
USACE
OTHER_NAMES
OTHER_NAMES
String
1000
0
0
Names other than the official name (i.e., reservoir name) of the dam in common use. Multiple names are
separated by a semi-colon. Blank if not applicable.
USACE
OWNER_TYPES
OWNER_TYPES
String
1000
0
0
Category describing the dam owner(s).
Federal
Local Government
Private
Public Utility
State
Tribe
Not Listed
Local Government should have taxing authority or is supported by taxes. If more than one owner type, types
are separated by a semi-colon. Examples listed below. If the dam is owned by a lake association and a public
utility, the owner type would be listed as Private;Public Utility. For multiple owners with the same type, one
category is used (i.e, if multiple individuals own one dam, it will list Private).
USACE
PRIMARY_OWNER_TYPE
PRIMARY_OWNER_TYPE
String
1000
0
0
Category describing the owner type. If more than one owner type, the main owner type is used.
USACE
STATE_FED_AGENCY
STATE_FED_AGENCY
String
255
0
0
The State or Agency for the dam (if applicable).
USACE
NUMBER_ASSOCIATED_STRUCTURES
NUMBER_ASSOCIATED_STRUCTURES
Integer
4
10
0
Number of separate structures associated with this dam project. Includes saddle dams (or dikes) as defined in
FEMA 148: Federal Guidelines for Dam Safety, Glossary of Terms, as a subsidiary dam of any type
constructed across a saddle or low point on the perimeter of a reservoir. Not included is the number of
appurtenant works which are defined as, but not limited to, such structures as spillways, either in the dam or
separate there from; the reservoir and its rim; low level outlet works; and water conduits such as tunnels,
pipelines or penstocks, either through the dam or its abutments.
USACE
DESIGNER_NAMES
DESIGNER_NAMES
String
1000
0
0
Name of the principal firm(s) or agency accomplishing design of dam and major appurtenant operating
features, and major modifications. Original designer is listed first, then modification designers (if applicable).
The names are separated using a semi-colon. If an Architect-Engineer Firm designed the dam under a state or
federal government contract, the state or federal agency name is listed first; then the company name second
separated by a semi-colon.
USACE
NON_FED_ON_FED
NON_FED_ON_FED
String
20
0
0
Indicating whether this dam is a non-federal dam located on federal property.
USACE
STATE_REGULATED
STATE_REGULATED
String
20
0
0
Calculated field: based on State Permitting Authority, State Inspection Authority, State Enforcement
Authority, and State Jurisdictional Dam. If Yes to all four authority criteria, then the dam is considered state
regulated and listed as Yes. If the state regulatory organization does not have all four authorities for this dam, then it is considered not state regulated and listed as No.
USACE
STATE_JURISDICTION
STATE_JURISDICTION
String
20
0
0
Listed as Yes if this dam meets the state regulatory organization’s definition of a jurisdictional dam. For
example, in New Mexico a jurisdictional dam is defined as a dam that exceeds 10 feet in height regardless of
storage or a dam that stores more than 10 acre-feet regardless of height. Therefore, in New Mexico, all dams
that meet that state criteria will have Yes listed in this field.
USACE
STATE_REGULATORY_AGENCY
STATE_REGULATORY_AGENCY
String
500
0
0
Name of the primary state agency with regulatory or approval authority for the dam.
USACE
STATE_PERMITTING
STATE_PERMITTING
String
20
0
0
Listed as Yes if the state regulatory organization has the authority to review and approve plans and
specifications to construct, enlarge, remove, and abandon dams (from the National Dam Safety Program Act of
2018).
USACE
STATE_INSPECTION
STATE_INSPECTION
String
20
0
0
Listed as Yes if the state regulatory organization has the authority to require or perform the inspection, at least
once every five years, of all dams and reservoirs that would pose a significant threat to human life and property
in case of failure to determine the continued safety of the dams and reservoirs (from the National Dam Safety
Program Act of 2018).
USACE
STATE_ENFORCEMENT
STATE_ENFORCEMENT
String
20
0
0
Listed as Yes if the state regulatory organization has the authority to issue notices, when applicable, to require
owners of dams to perform necessary maintenance or remedial work, revise operating procedures, or take other
actions, including breaching dams when necessary (from the National Dam Safety Program Act of 2018).
USACE
PRIMARY_SOURCE_AGENCY
PRIMARY_SOURCE_AGENCY
String
255
0
0
Primary state or federal agency responsible for providing and updating the NID data for that
particular dam.
USACE
LATITUDE
Latitude at dam centerline as a single value in decimal degrees, NAD83.
USACE
25.280001
30.997454
LATITUDE
Double
8
38
8
LONGITUDE
Longitude at dam centerline as a single value in decimal degrees, NAD83.
USACE
-87.502198
-80.050003
LONGITUDE
Double
8
38
8
STATE
State (Alphanumeric)
State where dam is located.
USACE
FL
Producer defined
STATE
String
500
0
0
COUNTYSTATE
COUNTYSTATE
String
500
0
0
The name of the county in which the dam is located. State where dam is located.
USACE
CITY
Nearest Downstream City/Town (Alphanumeric)
Name of the nearest downstream city, town, or village that is most likely to be affected by floods resulting from the failure of the dam.
USACE
CITY
String
256
0
0
DISTANCE
Distance to Nearest City/Town (Miles, Number)
Distance from the dam to the nearest affected downstream city/town/village (listed in the previous field), to the nearest mile (and tenth if appropriate).
USACE
0.0
49.0
DISTANCE
Double
8
38
8
RIVER_OR_STREAM
RIVER_OR_STREAM
String
255
0
0
The River or Stream designation may be entered in one of two ways. For the convenience of some
organizations, an alternative field entry is provided which is consistent with the “tributary and offstream”
designations used in the 1995-96 NID. If the alternative form is used, the NID Data Team will convert it to the
standard form prior to inclusion in the national inventory.
River or Stream Standard Entry: The official name of the river or stream on which the dam is built. If the
stream is unnamed, identify it as a tributary to a named river, e.g., Snake-TR. If the dam is located offstream,
enter the name of the river or stream plus “-OS”, e.g., Snake-OS.
River or Stream Alternative Entry: The official name of the river or stream on which the dam is built. If the
stream is unnamed, identify it as a tributary to a named river, e.g., TR-Snake. If the darn is located offstream,
enter the name of the river or stream plus the word, “OFFSTREAM,” e.g., Snake OFFSTREAM.
USACE
CONGDIST
CONGDIST
String
500
0
0
Congressional District where dam is located. Congressional District is generated based on
provided coordinates. If no coordinates are provided, then this field will be left blank.
USACE
CONG_REPRESNTATIVE
CONG_REPRESNTATIVE
String
100
0
0
USACE
Congressional District Representative where dam is located. Congressional District Representative is generated based on
provided coordinates. If no coordinates are provided, then this field will be left blank.
FED_AGENCY_OWNERS
FED_AGENCY_OWNERS
String
500
0
0
USACE
Federal agency that owns the dam (or a component of the dam). If multiple agencies are involved in owning
the dam, agencies are separated by semi-colon.
FED_AGENCY_FUNDINGS
FED_AGENCY_FUNDINGS
String
500
0
0
USACE
Federal agency that was involved in funding of the dam. If multiple agencies were/are involved with the
funding, agencies are separated by semi-colon.
FED_AGENCY_DESIGNERS
FED_AGENCY_DESIGNERS
String
500
0
0
USACE
Federal agency that was involved in the design of the dam. If multiple agencies were/are involved with the
design, agencies are separated by semi-colon.
FED_AGENCY_CONSTRUCTIONS
FED_AGENCY_CONSTRUCTIONS
String
500
0
0
USACE
Federal agency that was involved in the construction of the dam. If multiple agencies were/are involved with
the construction, agencies are separated by semi-colon.
FED_AGENCY_REGULATORIES
FED_AGENCY_REGULATORIES
String
500
0
0
USACE
Federal agency that is involved in the regulation of the dam. If multiple agencies are involved in regulating the
dam, agencies are separated by semi-colon.
FED_AGENCY_INSPECTIONS
FED_AGENCY_INSPECTIONS
String
500
0
0
USACE
Federal agency that is involved in the inspection of the dam. If multiple agencies are involved in inspecting the dam, agencies are separated by semi-colon.
FED_AGENCY_OPERATIONS
FED_AGENCY_OPERATIONS
String
500
0
0
USACE
Federal agency that is involved in the operation of the dam. If multiple agencies are involved in operating the
dam, agencies are separated by semi-colon
FED_AGENCY_OTHERS
FED_AGENCY_OTHERS
String
500
0
0
USACE
Federal agency that was/is involved in other aspects of the dam. If multiple agencies are involved in other
aspects, agencies are separated by semi-colon.
PRIMARY_PURPOSE
PRIMARY_PURPOSE
String
256
0
0
USACE
Category describing the main purpose for which the reservoir is used. If more than one purpose, the most
important is used.
PURPOSES
Category describing the current purpose(s) for which the reservoir is used.
Debris Control
Fire Protection, Stock, Or Small Farm Pond
Fish and Wildlife Pond
Flood Risk Reduction (to include Storm Water Management)
Grade Stabilization
Hydroelectric
Irrigation
Navigation
Recreation
Tailings
Water Supply
Other
If more than one purpose, purposes are separated by a semi-colon. The order should indicate the relative
decreasing importance of the purpose and the first purpose listed will be designated as Primary Purpose.
For example, Water Supply; Flood Risk Reduction; Recreation would indicate that Water Supply is the
primary purpose.
USACE
PURPOSES
String
1000
0
0
PRIMARY_DAM_TYPE
PRIMARY_DAM_TYPE
String
100
0
0
USACE
Category describing the main type of dam. If more than one type, the most dominant is used.
DAM_TYPES
DAM_TYPES
String
500
0
0
USACE
Category describing the type of dam.
Arch
Buttress
Concrete
Earth
Gravity
Masonry
Multi-Arch
Rockfill
Roller-Compacted Concrete
Stone
Timber Crib
Other
If more than one type, types are separated by a semi-colon. For example, Concrete;Buttress would indicate the
dam is a buttress dam made of concrete. If listed as Earth;Concrete, the dam has both earthen and concrete
components.
CORE_TYPES
CORE_TYPES
String
500
0
0
USACE
Indicates the position, type of watertight member and certainty.
Position:
Upstream Facing
Homogeneous dam
Core
Unlisted/Unknown
Type:
Bituminous Concrete
Concrete
Earth
Metal
Plastic
Unlisted/Unknown
Certainty:
Known
Estimated
FOUNDATIONS
FOUNDATIONS
String
500
0
0
USACE
The material upon which dam is founded, and certainty:
Foundation:
Rock
Rock and Soil
Soil
Unlisted/Unknown
Certainty:
Known
Estimated
DAM_HEIGHT
Height of the dam, in feet to the nearest foot, which is defined as the vertical distance between the lowest point
on the crest of the dam and the lowest point in the original streambed.
USACE
0.0
140.0
DAM_HEIGHT
Double
8
38
8
HYDRAULIC_HEIGHT
HYDRAULIC_HEIGHT
Double
8
38
8
USACE
Hydraulic height of the dam, in feet to the nearest foot, which is defined as the vertical difference between the
maximum design water level and the lowest point in the original streambed.
STRUCTURAL_HEIGHT
STRUCTURAL_HEIGHT
Double
8
38
8
USACE
Structural height of the dam, in feet to the nearest foot, which is defined as the vertical distance from the lowest
point of the excavated foundation to the top of the dam. Top of dam refers to the parapet wall and not the crest.
NID_HEIGHT
Maximum value of dam height, structural height, and hydraulic height. Accepted as the
general height of the dam.
USACE
2
145
NID_HEIGHT
Integer
4
10
0
DAM_LENGTH
Length of the dam, in feet, which is defined as the length along the top of the dam. This also includes the
spillway, powerplant, navigation lock, fish pass, etc., where these form part of the length of the dam. If
detached from the dam, these structures should not be included.
USACE
0
739200
DAM_LENGTH
Double
8
38
8
DAM_VOLUME
DAM_VOLUME
Integer
4
10
0
Total number of cubic yards occupied by the materials used in the dam structure. Portions of powerhouse,
locks, and spillways are included only if they are an integral part of the dam and required for structural
stability.
USACE
YEAR_COMPLETED
YEAR_COMPLETED
Integer
4
10
0
Year (four digits) when the original main dam structure was completed. If unknown, and reasonable estimate
is unavailable, the value will be blank.
USACE
NID_STORAGE
NID_STORAGE
Double
8
38
8
Maximum value of normal storage and maximum storage. Accepted as the general storage of
the dam.
USACE
MAX_STORAGE
MAX_STORAGE
Double
8
38
8
Maximum storage, in acre-feet, which is defined as the total storage space in a reservoir below the maximum
attainable water surface elevation, including any surcharge storage.
USACE
NORMAL_STORAGE
NORMAL_STORAGE
Double
8
38
8
Normal storage, in acre-feet, which is defined as the total storage space in a reservoir below the normal
retention level, including dead and inactive storage and excluding any flood control or surcharge storage. For
normally dry dams, the normal storage will be a zero value. If unknown, the value will be blank and not zero.
USACE
SURFACE_AREA
SURFACE_AREA
Double
8
38
8
Surface area, in acres, of the impoundment at its normal retention level.
USACE
DRAINAGE_AREA
DRAINAGE_AREA
Double
8
38
8
Drainage area of the dam, in square miles, which is defined as the area that drains to a particular point (in this
case, the dam) on a river or stream.
USACE
MAX_DISCHARGE
MAX_DISCHARGE
Double
8
38
8
Number of cubic feet per second which the spillway is capable of discharging when the reservoir is at its
maximum designed water surface elevation.
USACE
SPILLWAY_TYPE
SPILLWAY_TYPE
String
256
0
0
Category describing the type of spillway.
Controlled
Uncontrolled
None
USACE
SPILLWAY_WIDTH
SPILLWAY_WIDTH
Integer
4
10
0
The width of the spillway, to the nearest foot, available for discharge when the reservoir is at its maximum
designed water surface elevation. Typically for an open channel spillway, this is the bottom width. For pipe
spillways or drop inlets that have diameters, use the diameter of the pipe.
USACE
NUMBER_OF_LOCKS
NUMBER_OF_LOCKS
Integer
4
10
0
Number of existing navigation locks for the project.
USACE
LENGTH_OF_LOCKS
LENGTH_OF_LOCKS
Double
8
38
8
Length of the primary navigation lock to the nearest foot.
USACE
WIDTH_OF_LOCKS
WIDTH_OF_LOCKS
Double
8
38
8
Width of the primary navigation lock to the nearest foot.
USACE
YEARS_MODIFIED
YEARS_MODIFIED
String
500
0
0
USACE
Year (four digits) when major modifications or rehabilitation of dam or major control structures were
completed. Major modifications are defined as a structural, foundation, or mechanical construction activity
which significantly restores the project to original condition; changes the project’s operation; capacity or
structural characteristics (e.g. spillway or seismic modification); or increases the longevity, stability, or safety
of the dam and appurtenant structures.
Category describing the type of modification.
Foundation
Hydraulic
Mechanical
Seismic
Structural
Other
OUTLET_GATES
OUTLET_GATES
String
500
0
0
Category describing the type of (1) spillway and (2) controlled outlet gates, if any:
None
Uncontrolled
Tainter (radial)
Vertical Lift
Roller
Bascule
Drum
Needle
Flap
Slide (sluice gate)
Valve
Other controlled
Allowed up to five types in decreasing size order, separated by semicolons, followed by number of gates.
USACE
ASSOCIATED_STRUCTURES
ASSOCIATED_STRUCTURES
String
1000
0
0
USACE
Number of separate structures associated with this dam project. Includes saddle dams (or dikes) as defined in
FEMA 148: Federal Guidelines for Dam Safety, Glossary of Terms, as a subsidiary dam of any type
constructed across a saddle or low point on the perimeter of a reservoir. Not included is the number of
appurtenant works which are defined as, but not limited to, such structures as spillways, either in the dam or
separate there from; the reservoir and its rim; low level outlet works; and water conduits such as tunnels,
pipelines or penstocks, either through the dam or its abutments.
LAST_INSPECTION_DATE
LAST_INSPECTION_DATE
Date
8
0
0
Date of the most recent periodic or comprehensive inspection of the dam prior to the NID data transmittal by the submitting agency.
USACE
INSPECTION_FREQUENCY
INSPECTION_FREQUENCY
Integer
4
10
0
The scheduled frequency interval for periodic or comprehensive inspections, in years.
USACE
HAZARD_POTENTIAL
HAZARD_POTENTIAL
String
1000
0
0
Category to indicate the potential hazard to the downstream area resulting from failure or mis-operation of the
dam or facilities. It reflects probable loss of human life and impacts on economic, environmental, and lifeline
interests. The hazard potential does not speak to the condition of the dam or the risk of the dam failing.
Low
Significant
High
Undetermined
Definitions, as accepted by the Interagency Committee on Dam Safety, are as follows:
Low Hazard Potential
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no
probable loss of human life and low economic and/or environmental losses. Losses are principally limited to
the owner’s property.
Significant Hazard Potential
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation
results in no probable loss of human life but can cause economic loss, environment damage, disruption of
lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in
predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
High Hazard Potential
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably
cause loss of human life.
Undetermined Hazard Potential
Dams for which a downstream hazard potential has not been designated or is not provided.
USACE
CONDITION_ASSESSMENT
CONDITION_ASSESSMENT
String
20
0
0
Assessment that best describes the condition of the dam based on available information.
Satisfactory
Fair
Poor
Unsatisfactory
Not Rated
Not Available
A dam safety deficiency is defined as a load capacity limit or other issue that can result in a failure of the dam
or appurtenant structure. It is a characteristic or condition that does not meet the applicable minimum
regulatory criteria.
Normal operations are defined as loading on the dam resulting from day-to-day pool operations to achieve
authorized purposes in accordance with minimum state or federal regulatory criteria.
Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all
loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal
regulatory criteria or tolerable risk guidelines.
Typical Circumstances:
• No existing deficiencies or potentially unsafe conditions are recognized, with the exception of minor
operational and maintenance items that require attention.
• Safe performance is expected under all loading conditions including the design earthquake and design
flood.
• Permanent risk reduction measures (reservoir restrictions, spillway modifications, operating
procedures, etc) have been implemented to eliminate identified deficiencies.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme
hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take
further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
applicable state or federal criteria.
Other Circumstances:
• Lack of maintenance requires attention to prevent developing safety concerns.
• Maintenance conditions may exist that require remedial action greater than routine work and/or
secondary studies or investigations.
• Interim or permanent risk reduction measures may be under consideration. Poor
A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial
action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which
identify a potential dam safety deficiency. Investigations and studies are necessary.
Other Circumstances:
• Dam has multiple deficiencies or a significant deficiency that requires remedial work.
• Lack of maintenance (erosion, sinkholes, settlement, cracking, unwanted vegetation, animal burrows,
inoperable outlet gates) has affected the integrity or the operation of the dam under normal operational
conditions and requires remedial action to resolve.
• Critical design information is needed to evaluate the potential performance of the dam. For example, a
field observation or a review of the dam’s performance history has identified a question that can only
be answered by review of the design and construction history for the dam. Uncertainty arises when
there is no design and/or construction documentation available for review and additional analysis is
needed to better understand the risk associated with operation under normal operational conditions.
• Interim or permanent risk reduction measures may be under consideration. Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem
resolution.
Typical Circumstances:
• A critical component of the dam has deteriorated to unacceptable condition or failed.
• A safety inspection indicates major structural distress (excessive uncontrolled seepage, cracks, slides,
sinkholes, severe deterioration, etc.), advanced deterioration, or operational deficiencies which could
lead to failure of the dam or its appurtenant structures under normal operating conditions.
• Reservoir restrictions or other interim risk reduction measures are required.
• A partial or complete reservoir drawdown may be mandated by the state or federal regulatory agency. Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for
whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is not provided to the NID.
USACE
CONDITION_ASSESS_DATE
CONDITION_ASSESS_DATE
Date
8
0
0
USACE
Date of the most recent assessment of the dam prior to the NID data transmittal by the submitting agency.
EAP_PREPARED
EAP_PREPARED
String
255
0
0
Emergency Action Plan (EAP Prepared)
Indicating whether this dam has an Emergency Action Plan (EAP) developed by the dam owner. An EAP is
defined as a plan of action to be taken to reduce the potential for property damage and loss of life in an area
affected by a dam failure or large flood.
Yes
No
Not Required (by regulatory agency)
If an EAP is required (or not required) and has one, it will be listed as Yes. If an EAP is required and does not
have one, it will be listed as No. If there is not an EAP and one is not required, it will be listed as Not
Required.
USACE
EAP_LAST_REV_DATE
EAP_LAST_REV_DATE
Date
8
0
0
Date of the most recent revision of the Emergency Action Plan (including update and verification of the contact
lists) prior to the NID data transmittal by the submitting agency.
USACE
FORMER_NAMES
FORMER_NAMES
String
500
0
0
Previous reservoir or dam name(s), if changed. Multiple names are separated by a semi-colon.
USACE
IS_ASSOCIATED_STRUCTURE
IS_ASSOCIATED_STRUCTURE
String
3
0
0
Listed as Yes if there is an Other Structure ID to indicate the dam is a separate/associated
structure to a primary dam.
USACE
AIANNH
AIANNH
String
100
0
0
American Indian/Alaska Native/Native Hawaiian (AIANNH)
Calculated Field: Name of federally recognized American Indian reservations and off-reservation trust land
areas, state-recognized American Indian reservations, or Hawaiian home lands (HHLs). The statistical entities
included are Alaska Native village statistical areas (ANVSAs), Oklahoma tribal statistical areas (OTSAs),
tribal designated statistical areas (TDSAs), and state designated tribal statistical areas (SDTSAs). Joint use
areas are also included in this geography data set and refer to areas that are administered jointly and/or claimed
by two or more American Indian tribes. More information can be found from
https://catalog.data.gov/dataset/tiger-line-shapefile-2019-nation-u-s-current-american-indian-alaska-nativenative-hawaiian-area.
USACE
FEDERALLY_REGULATED_DAM
FEDERALLY_REGULATED_DAM
String
3
0
0
Based on the data field “Federal Agency Involvement Regulatory”. If a Federal Agency is
listed as being involved in the regulatory aspects of the dam, then the dam is listed as Yes, federally regulated.
USACE
BUILT_UNDER_SEC_OF_AG_AUTH
BUILT_UNDER_SEC_OF_AG_AUTH
String
3
0
0
Indicating whether this dam was designed and built by the Natural Resources Conservation Service (NRCS)
through one of the four Watershed Program authorizations.
USACE
NRCS_WATERSHED_DAM_AUTH
NRCS_WATERSHED_DAM_AUTH
String
100
0
0
If this dam was designed and built by the Natural Resources Conservation Service (NRCS) through one of the
four Watershed Program authorizations, the specific authorization is listed.
Flood Control Act of 1944 (Public Law 78-534)
1953 Pilot Watershed Program (Public Law 83-156)
Watershed Protection and Flood Prevention Act of 1954 (Public Law 83-566)
1962 Resource Conservation and Development Act (Public Law 87-703)
USACE
OPERATIONAL_STATUS
OPERATIONAL_STATUS
String
100
0
0
Category that best describes the operational or remediation activities of the dam based on available
information.
Normal Operations
Under Investigation, Planning, Permitting, or Design for Remediation
Under Remediation
Enforcement Pending/Ongoing
Not Applicable.
A dam safety deficiency is defined as a load capacity limit or other issue that can result in a failure of the dam
or appurtenant structure. It is a characteristic or condition that does not meet the applicable minimum
regulatory criteria.
Normal Operations
No existing or potential dam safety deficiencies are recognized. Dam is operating without restrictions. Applies
to dams with a Satisfactory or Fair Condition Assessment. The following Operational Status Categories apply to dams with a Fair, Poor or Unsatisfactory Condition
Assessment.
Under Investigation, Planning, Permitting, or Design for Remediation
A dam safety deficiency is recognized but uncertainties may exist. Dam remediation plan is currently under investigation, planning, permitting or design review. Temporary risk reduction measures, such as reservoir
restrictions or early warning systems, may be in place to decrease the risk caused by the known deficiencies.
Under Remediation
A dam safety deficiency is recognized. Temporary risk reduction measures, such as reservoir restrictions, may
be in place to decrease the risk caused by the known deficiencies. Active remedial measures or construction are
occurring to correct the known deficiencies. Enforcement Pending/Ongoing
A dam safety deficiency is recognized. Dam owner is unresponsive and not taking risk reduction or
remediation measures to make the dam meet applicable regulatory criteria. Regulatory agency may be already
taking enforcement action against the dam owner.
Not Applicable
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but has not
been assigned a condition assessment. Applies to dams with no Condition Assessment (Not Rated).
Not Available
The regulatory agency does not provide this information to the NID.
USACE
OPERATIONAL_STATUS_DATE
OPERATIONAL_STATUS_DATE
Date
8
0
0
Date of the most recent operational status assessment of the dam prior to the NID data transmittal by the
submitting agency.
USACE
WEBSITE_URL
WEBSITE_URL
String
150
0
0
Web Site for more information on specific dam or regulatory agency.
USACE
LAT_DD
Latitude in decimal degrees.
GeoPlan
LAT_DD
Double
8
38
8
LONG_DD
Longitude in decimal degrees.
GeoPlan
LONG_DD
Double
8
38
8
MGRS
Military Grid Reference System (MGRS) Coordinate of the Facility. The MGRS is the geocoordinate standard used by NATO militaries for locating points on the earth. The MGRS provides a means to represent any location on the surface of the Earth using an alphanumeric string. Hierarchical references are based on the Universal Transverse Mercator (UTM) coordinate system. The MGRS is used for the entire earth. http://mgrs-data.org/
GeoPlan
MGRS
String
15
0
0
GOOGLEMAP
Webpage hyperlink to location in Google Maps.
GeoPlan
GOOGLEMAP
String
100
0
0
DESCRIPT
DESCRIPT
String
80
0
0
GeoPlan
Field added by FGDL based on the following:
!NAME! + " [" + !NIDID! + "]"
FGDLAQDATE
The date GeoPlan acquired the data from the source.
GeoPlan
FGDLAQDATE
Date
8
0
0
AUTOID
AUTOID
Integer
4
10
Unique ID added by GeoPlan. This field is for historic tracking of features.
0
National Inventory of Dams - Reference Documents
https://nid.sec.usace.army.mil/#/documents
NID Data Dictionary - Explanation of Data Fields and Values
FEDERAL AGENCY CODE TABLE
Federal Agency Name Federal Agency Code
Natural Resources Conservation Serv USDA NRCS
Formerly Soil Conservation Serv (SCS)
Forest Service USDA FS
Rural Housing Service USDA RHS
US Army Corps of Engineers CE
US Army DOD USA
US Navy DOD USN
US Air Force DOD USAF
Bureau of Reclamation DOI BR
Bureau of Indian Affairs DOI BIA
Bureau of Land Management DOI BLM
Fish and Wildlife Service DOI FWS
Geological Survey DOI GS
National Park Service DOI NPS
Mine Safety and Health Administration DOL MSHA
International Boundary and Water Commission IBWC
Federal Energy Regulatory Commission DOE FERC
Nuclear Regulatory Commission US NRC
Tennessee Valley Authority TVA
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