nid_column_attrs.json

{"description":{"DAM_NAME":"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.","OTHER_DAM_NAME":"Names other than the official name (i.e., reservoir name) of the dam in common use. Names are separated using a semi-colon. Blank if not applicable.","DAM_FORMER_NAME":"Previous reservoir or dam name(s), if changed. Names are separated using a semi-colon.","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. This field is used as the unique identifier for each dam record. The first two characters of the identity are the state two-letter abbreviation, based on the location of the dam. Typically, the last five characters of the identity are a unique number (AB#####); although States are allowed to use alphanumeric combinations in these last five characters.For saddle dams or dikes, the NID ID is the same as the main dam. See saddle dam definition in Number Separate Structures Field (listed below).","LONGITUDE":"Longitude at dam centerline as a single value in decimal degrees, NAD83.","LATITUDE":"Latitude at dam centerline as a single value in decimal degrees, NAD83.","COUNTY":"The name of the county in which the dam is located.","RIVER":"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 \\\\\\\\u201ctributary and offstream\\\\\\\\u201d 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 \\\\\\\\u201c-OS\\\\\\\\u201d, 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, \\\\\\\\u201cOFFSTREAM,\\\\\\\\u201d e.g., Snake OFFSTREAM.","CITY":"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.","DISTANCE":"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).","OWNER_NAME":"Name(s) of the dam owner. If multiple owners, different owners are separated by a semi-colon.","OWNER_TYPE":"Code to indicate the type of owner: F for Federal; S for State; L for Local Government (defined as have taxing authority or is supported by taxes); U for Public Utility; P for Private. X for Not Listed. Codes are concatenated if the dam is owned by more than one type. For example, if the dam is owned by a lake association and a public utility, the owner type would be listed as PU. For multiple owners under the same type, one code is used. For example, if multiple individuals own one dam, it will list P for private dam ownership. Some examples of owner types. Local Government should have taxing authority or is supported by taxes. A Lake District is supported by taxes and considered Local Government. A lake association is supported by association dues and would not be a Local Government owner type but rather Private owner type.","DAM_DESIGNER":"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.","DAM_TYPE":"Codes, in order of importance, to indicate the type of dam:RE for Earth;ER for Rockfill;PG for Gravity;CB for Buttress;VA for Arch;MV for Multi-Arch;RC for Roller-Compacted Concrete;CN for Concrete;MS for Masonry;ST for Stone;TC for Timber Crib;OT for Other.Codes are concatenated if the dam is a combination of several types. For example, the entry CNCB would indicate a concrete buttress dam type.","CORE":"Code to indicate the position, type of watertight member and certainty,Position:F for upstream facing;H for homogeneous dam;I for core;X for unlisted\\\\\\/unknown;Type:A for bituminous concrete;C for concrete;E for earth;M for metal;P for plastic;X for unlisted\\\\\\/unknown;Certainty:K for known;Z for estimated;","FOUNDATION":"Code for the material upon which dam is founded, and certainty:Foundation:R for rock;RS for rock and soil;S for soil;U for unlisted\\\\\\/unknown.Certainty:K for known;Z for estimated.","YEAR_COMPLETED":"Year (four digits) when the original main dam structure was completed. If unknown, and reasonable estimate is unavailable, \\\\\\\\u201c0000\\\\\\\\u201d is used.","YEAR_MODIFIED":"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\\\\\\\\u2019s operation; capacity or structural characteristics (e.g. spillway or seismic modification); or increases the longevity, stability, or safety of the dam and appurtenant structures. Entries should be followed by one of more of the following codes indicating type of modification: S for structural;F for foundation;M for mechanical;E for seismic;H for hydraulic;O for other.Up to ten modifications can be entered, separated by semicolons.","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.","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.","STRUCTURAL_HEIGHT":"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.","HYDRAULIC_HEIGHT":"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.","NID_HEIGHT":"Calculated field: Maximum value of dam height, structural height, and hydraulic height. Accepted as the general height of the dam.","MAX_DISCHARGE":"Number of cubic feet per second (cu ft\\\\\\/sec) which the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.","MAX_STORAGE":"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.","NORMAL_STORAGE":"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 flood control dams, the normal storage will be a zero value. If unknown, the value will be blank and not zero.","NID_STORAGE":"Calculated field: Maximum value of normal storage and maximum storage. Accepted as the general storage of the dam.","SURFACE_AREA":"Surface area, in acres, of the impoundment at its normal retention level.","DRAINAGE_AREA":"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.","HAZARD":"Code to indicate the potential hazard to the downstream area resulting from failure or mis-operation of the dam or facilities:L for Low;S for Significant;H for High U for Undetermined.Definitions, as accepted by the Interagency Committee on Dam Safety, are as follows:1. 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 environ-mental losses. Losses are principally limited to the owner\\\\\\\\u2019s property.2. 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 con\\\\\\\\u00accerns. Significant hazard potential classification dams are often located in predom\\\\\\\\u00aci\\\\\\\\u00acnantly rural or agricultural areas but could be located in areas with population and significant infrastructure.3. HIGH HAZARD POTENTIAL Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life. Hazard Potential Classification ||| Loss of Human Life ||| Economic, Environmental, Lifeline Losses Low |||None expected ||| Low and generally limited to owner Significant ||| None expected ||| Yes High ||| Probable.||| One or more expected Yes (but not necessary for this classification) 4. UNDETERMINED HAZARD POTENTIAL Dams for which a downstream hazard potential, as defined in 1-3 above, has not been designated or is not provided. Note that dams with a code \\\\\\\\u201cU\\\\\\\\u201d will be considered for NID inclusion (see Chapter 3) the same as a dam with low hazard potential. If included in the NID, the undetermined classification will be used in publication.","INSPECTION_DATE":"Date of the most recent inspection of the dam prior to the transmittal of the data by the submitting agency.","INSPECTION_FREQUENCY":"The scheduled frequency interval for periodic inspections, in years.","STATE_REG_DAM":"Calculated field based on Permitting Authority, Inspection Authority and Enforcement Authority. If Yes to all three authority criteria, then dam is state regulated and will be listed as Yes.","STATE_REG_AGENCY":"Name of the primary state agency with regulatory or approval authority over the dam.","SPILLWAY_TYPE":"Code that describes the type of spillway:C for Controlled;U for Uncontrolled;N for None.","SPILLWAY_WIDTH":"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.","OUTLET_GATES":"Code(s) that describe the type of (1) spillway and (2) controlled outlet gates, if any:X for None;U for Uncontrolled;T for Tainter (radial);L for Vertical Lift;R for Roller;B for Bascule;D for Drum;N for Needle;F for Flap;S for Slide (sluice gate);V for Valve;O for Other controlled.Allowed up to five types in decreasing size order, separated by semicolons, followed by number of gates.","VOLUME":"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.","LENGTH_OF_LOCKS":"Length of the primary navigation lock to the nearest foot.","WIDTH_OF_LOCKS":"Width of the primary navigation lock to the nearest foot.","FED_FUNDING":"Code identifying which federal agency was involved in funding of the dam. Codes are separated by semi-colon if several agencies were involved.","FED_DESIGN":"Code identifying which federal agency was involved in the design of the dam. Codes are separated by semi-colon if several agencies were involved.","FED_CONSTRUCTION":"Code identifying which federal agency was involved in the construction of the dam. Codes are separated by semi-colon if several agencies were involved.","FED_REGULATORY":"Code identifying which federal agency is involved in the regulation of the dam. Codes are separated by semi-colon if several agencies are involved.","FED_INSPECTION":"Code identifying which federal agency is involved in the inspection of the dam. Codes are separated by semi-colon if several agencies are involved.","FED_OPERATION":"Code identifying which federal agency is involved in the operation of the dam. Codes are separated by semi-colon if several agencies are involved.","FED_OWNER":"Code identifying which federal agency partly or wholly owns the dam. Codes are separated by semi-colon if several owners are involved.","FED_OTHER":"Code identifying which federal agency is involved in other aspects of the dam. Codes are separated by semi-colon if several owners are involved.","SOURCE_AGENCY":"Primary state or federal agency responsible for data.","STATE":"State where dam is located.","SUBMIT_DATE":"Date data was submitted to the US Army Corps of Engineers for inclusion to the National Inventory of Dams.","URL_ADDRESS":"Web Site for more information on particular dam. This information is not collected at this time and represents a placeholder for future data collection.","CONG_NAME":"Name of congressional representative for the congressional district where dam is located. Congressional District is calculated based on provided coordinates. If not coordinates are provided, then this field will be left blank.","PARTY":"Name of political party associated with the congressional representative for the congressional district where dam is located. Congressional District is calculated based on provided coordinates. If not coordinates are provided, then this field will be left blank.","CONG_DIST":"Congressional District where dam is located. Congressional District is calculated based on provided coordinates. If not coordinates are provided, then this field will be left blank.","OTHERSTRUCTUREID":"The identification number (S001, S002, etc.) for the saddle dam or dike associated with the larger dam project. This field only applies to saddle dams or dikes. This field is blank for all other dams.","NUMSEPARATESTRUCTURES":"Number of separate structures associated with this dam project. Include 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 in the number of appurtenant works which include, but are 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 (FEMA Model State Dam Safety Program Glossary of Terms).","PERMITTINGAUTHORITY":"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 Dam Safety Act of 2006).","INSPECTIONAUTHORITY":"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 Dam Safety Act of 2006).","ENFORCEMENTAUTHORITY":"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 Dam Safety Act of 2006).","JURISDICTIONALDAM":"Yes if this dam meets the state regulatory organization\\\\\\\\u2019s 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.","EAP_LAST_REV_DATE":"The date of the most recent revision of the Emergency Action Plan prior to the transmittal of the data by the submitting agency. This field requires day, month and year information only. The required format is mm\\\\\\/dd\\\\\\/yyyy (04\\\\\\/20\\\\\\/2012)."},"unit":{"DAM_NAME":"Alphanumeric","OTHER_DAM_NAME":"Alphanumeric","DAM_FORMER_NAME":"Alphanumeric","NIDID":"Alphanumeric","LONGITUDE":"Number","LATITUDE":"Number","COUNTY":"Alphanumeric","RIVER":"Alphanumeric","CITY":"Alphanumeric","DISTANCE":"Miles","OWNER_NAME":"Alphanumeric","OWNER_TYPE":"Alphanumberic","DAM_DESIGNER":"Alphanumeric","DAM_TYPE":"Alphanumeric","CORE":"Alphanumeric","FOUNDATION":"Alphanumeric","YEAR_COMPLETED":"Number","YEAR_MODIFIED":"Alphanumeric","DAM_LENGTH":"Feet","DAM_HEIGHT":"Feet","STRUCTURAL_HEIGHT":"Feet","HYDRAULIC_HEIGHT":"Feet","NID_HEIGHT":"Feet","MAX_DISCHARGE":"Cubic Feet\\\\\\/Second","MAX_STORAGE":"Acre-Feet","NORMAL_STORAGE":"Acre-Feet","NID_STORAGE":"Acre-Feet","SURFACE_AREA":"Acres","DRAINAGE_AREA":"Square Miles","HAZARD":"Alphanumeric","INSPECTION_DATE":"Number","INSPECTION_FREQUENCY":"Number","STATE_REG_DAM":"Alphanumeric","STATE_REG_AGENCY":"Alphanumeric","SPILLWAY_TYPE":"Alphanumeric","SPILLWAY_WIDTH":"Number","OUTLET_GATES":"Alphanumeric","VOLUME":"Cubic yards","LENGTH_OF_LOCKS":"Feet","WIDTH_OF_LOCKS":"Number","FED_FUNDING":"Alphanumeric","FED_DESIGN":"Alphanumeric","FED_CONSTRUCTION":"Alphanumeric","FED_REGULATORY":"Alphanumeric","FED_INSPECTION":"Alphanumeric","FED_OPERATION":"Alphanumeric","FED_OWNER":"Alphanumeric","FED_OTHER":"Alphanumeric","SOURCE_AGENCY":"Alphanumeric","STATE":"Alphanumeric","SUBMIT_DATE":"Date","URL_ADDRESS":"Alphanumeric","CONG_NAME":"Alphanumeric","PARTY":"Alphanumeric","CONG_DIST":"Alphanumeric","OTHERSTRUCTUREID":"Alphanumeric","NUMSEPARATESTRUCTURES":"Number","PERMITTINGAUTHORITY":"Alphanumeric","INSPECTIONAUTHORITY":"Alphanumeric","ENFORCEMENTAUTHORITY":"Alphanumeric","JURISDICTIONALDAM":"Alphanumeric","EAP_LAST_REV_DATE":"Date"}}