DAM_HEIGHT
Type: Float
Meaning: Indicates the height of the dam.
Importance: Critical for assessing the scale and impact of the dam.
Importance Details:
- Metrics: Range: 789.0, Mean: 27.879, Median: 24.0, Standard Deviation: 27.314, Minimum: 0.0, Maximum: 789.0
- Grade: 0.200
NID_STORAGE
Type: Float
Meaning: Indicates the National Inventory of Dams (NID) storage capacity.
Importance: Important for understanding the storage capacity of the dam.
Importance Details:
- Metrics: Range: 277540000.0, Mean: 14974.828, Median: 135.0, Standard Deviation: 956582.854, Minimum: 0.0, Maximum: 277540000.0
- Grade: 0.150
MAX_STORAGE
Type: Float
Meaning: Represents the maximum storage capacity of the dam.
Importance: Essential for understanding the dam's maximum storage capability.
Importance Details:
- Metrics: Range: 277540000.0, Mean: 15089.634, Median: 135.0, Standard Deviation: 966178.912, Minimum: 0.0, Maximum: 277540000.0
- Grade: 0.150
NUMBER_ASSOCIATED_STRUCTURES
Type: Integer
Meaning: Indicates the number of associated structures with the dam.
Importance: Important for understanding the complexity of the dam infrastructure.
Importance Details:
- Metrics: Range: 15.0, Mean: 0.037, Median: 0.0, Standard Deviation: 0.464, Minimum: 0.0, Maximum: 15.0
- Grade: 0.100
DISTANCE
Type: Float
Meaning: Measures the distance related to the dam.
Importance: Relevant for analyzing spatial aspects related to the dam.
Importance Details:
- Metrics: Range: 3500.0, Mean: 7.422, Median: 2.0, Standard Deviation: 22.023, Minimum: 0.0, Maximum: 3500.0
- Grade: 0.100
HYDRAULIC_HEIGHT
Type: Float
Meaning: Indicates the hydraulic height of the dam.
Importance: Important for understanding the water pressure the dam is designed to hold.
Importance Details:
- Metrics: Range: 775.5, Mean: 24.0, Median: 20.0, Standard Deviation: 26.273, Minimum: 0.0, Maximum: 775.5
- Grade: 0.100
STRUCTURAL_HEIGHT
Type: Float
Meaning: Indicates the structural height of the dam.
Importance: Important for assessing the physical dimensions of the dam's structure.
Importance Details:
- Metrics: Range: 770.0, Mean: 27.268, Median: 24.0, Standard Deviation: 29.325, Minimum: 0.0, Maximum: 770.0
- Grade: 0.100
DAM_LENGTH
Type: Float
Meaning: Represents the length of the dam.
Importance: Critical for understanding the extent of the dam's reach.
Importance Details:
- Metrics: Range: 739200.0, Mean: 1051.332, Median: 525.0, Standard Deviation: 4390.071, Minimum: 0.0, Maximum: 739200.0
- Grade: 0.150
DAM_VOLUME
Type: Float
Meaning: Measures the volume of the dam.
Importance: Essential for understanding the size and capacity of the dam.
Importance Details:
- Metrics: Range: 474321897.0, Mean: 3588203.406, Median: 616724.5, Standard Deviation: 20188780.645, Minimum: 0.0, Maximum: 474321897.0
- Grade: 0.200
NORMAL_STORAGE
Type: Float
Meaning: Indicates the normal storage capacity of the dam.
Importance: Important for understanding the typical operational storage level.
Importance Details:
- Metrics: Range: 277540000.0, Mean: 10954.042, Median: 62.0, Standard Deviation: 959830.706, Minimum: 0.0, Maximum: 277540000.0
- Grade: 0.150
SURFACE_AREA
Type: Float
Meaning: Represents the surface area of the dam.
Importance: Critical for understanding the extent of the waterbody controlled by the dam.
Importance Details:
- Metrics: Range: 20255000.0, Mean: 613.408, Median: 11.0, Standard Deviation: 75151.98, Minimum: 0.0, Maximum: 20255000.0
- Grade: 0.150
DRAINAGE_AREA
Type: Float
Meaning: Indicates the drainage area related to the dam.
Importance: Important for understanding the potential water inflow and outflow related to the dam.
Importance Details:
- Metrics: Range: 8300000.0, Mean: 928.716, Median: 1.3, Standard Deviation: 44453.096, Minimum: 0.0, Maximum: 8300000.0
- Grade: 0.150
MAX_DISCHARGE
Type: Float
Meaning: Represents the maximum discharge capacity of the dam.
Importance: Essential for understanding the dam's ability to handle water flow, especially in flood scenarios.
Importance Details:
- Metrics: Range: 9999999.0, Mean: 7601.637, Median: 344.0, Standard Deviation: 81946.435, Minimum: 0.0, Maximum: 9999999.0
- Grade: 0.200
SPILLWAY_WIDTH
Type: Float
Meaning: Indicates the width of the spillway.
Importance: Important for understanding the spillway's capacity to manage overflow.
Importance Details:
- Metrics: Range: 288288.0, Mean: 79.832, Median: 2.0, Standard Deviation: 1946.796, Minimum: 0.0, Maximum: 288288.0
- Grade: 0.100
NUMBER_OF_LOCKS
Type: Integer
Meaning: Indicates the number of locks associated with the dam.
Importance: Important for understanding the complexity and navigational features of the dam.
Importance Details:
- Metrics: Range: 999.0, Mean: 0.021, Median: 0.0, Standard Deviation: 4.097, Minimum: 0.0, Maximum: 999.0
- Grade: 0.100
LENGTH_OF_LOCKS
Type: Float
Meaning: Represents the length of the locks.
Importance: Important for understanding the lock capacity and navigational aspects of the dam.
Importance Details:
- Metrics: Range: 1200.0, Mean: 1.897, Median: 0.0, Standard Deviation: 36.496, Minimum: 0.0, Maximum: 1200.0
- Grade: 0.100
WIDTH_OF_LOCKS
Type: Float
Meaning: Represents the width of the locks.
Importance: Important for understanding the capacity and navigational functionality of the dam's locks.
Importance Details:
- Metrics: Range: 110.0, Mean: 0.281, Median: 0.0, Standard Deviation: 5.194, Minimum: 0.0, Maximum: 110.0
- Grade: 0.100
Total Qualitative Grade
- PRIMARY_OWNER_TYPE: 0.200
- PRIMARY_PURPOSE: 0.200
- SPILLWAY_TYPE: 0.150
- HAZARD_POTENTIAL: 0.150
- PRIMARY_DAM_TYPE: 0.100
Total Quantitative Grade
- DAM_HEIGHT: 0.200
- NID_STORAGE: 0.150
- MAX_STORAGE: 0.150
- NUMBER_ASSOCIATED_STRUCTURES: 0.100
Overall Dataset Importance Grade
- Total Qualitative Grade: 1.000
- Total Quantitative Grade: 0.600
- Overall Dataset Importance Grade: 1.000
Object ID
Type: Long integer
Meaning: Internal object ID
Importance: Primarily for internal database management.
Other Structure ID
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal ID
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Other Names
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Owner Types
Type: Character string
Meaning: Category describing the dam owner(s).
Importance: Low importance for general analysis.
Primary Owner Type
Type: Character string
Meaning: Category describing the owner type. If more than one owner type, the main owner type is used.
Importance: Low importance for general analysis.
State or Federal Agency ID
Type: Character string
Meaning: The State or Agency identification number for the dam (if applicable).
Importance: Low importance for general analysis.
Number of Associated Structures
Type: Long integer
Meaning: 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.
Importance: Low importance for general analysis.
Designer Names
Type: Character string
Meaning: Principal firm(s) or agency accomplishing design of dam and major appurtenant operating features, and major modifications.
Importance: Low importance for general analysis.
Non-Federal Dam on Federal Property
Type: Character string
Meaning: Indicates whether this dam is a non-federal dam located on federal property.
Importance: Low importance for general analysis.
State Regulated Dam
Type: Character string
Meaning: Indicates if dam is state regulated, based on State Permitting Authority, State Inspection Authority and State Enforcement Authority.
Importance: Low importance for general analysis.
State Jurisdictional Dam
Type: Character string
Meaning: Indicates if this dam meets the state regulatory organization's definition of a jurisdictional dam.
Importance: Low importance for general analysis.
State Regulatory Agency
Type: Character string
Meaning: Name of the primary state agency with regulatory or approval authority over the dam.
Importance: Low importance for general analysis.
State Permitting Authority
Type: Character string
Meaning: Indicates 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).
Importance: Low importance for general analysis.
State Inspection Authority
Type: Character string
Meaning: Indicates 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 2014).
Importance: Low importance for general analysis.
State Enforcement Authority
Type: Character string
Meaning: Indicates 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 2014).
Importance: Low importance for general analysis.
Source Agency
Type: Character string
Meaning: Primary state or federal agency responsible for providing and updating the National Inventory of Dams (NID) data.
Importance: Low importance for general analysis.
Federal Agency Owner
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement in Funding
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement in Design
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement in Construction
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement in Regulatory
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement in Inspection
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement in Operation
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.
Federal Agency Involvement – Other
Type: Character string
Meaning: 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.
Importance: Low importance for general analysis.