Record Layout for Dams

FieldTypeDesc

NIDIDtextNat'l Inventory of Dams ID; for saddle dams or dikes, the NIDID is the same as the main dam.

Dam_NametextDam name

Insp_datedateInspection date (converted)

Submit_datedatesubmit_date converted by NICAR

RivertextName of the river or stream on which the dam was built; if on a tributary, use "TR" and name of main river or stream; if offstream, use OS or OFFSTREAM.

City_02textThe nearest city, taken from the 2002 data

CountytextThe county in which the dam is located

StatetextThe state in which the dam is located

Cong_DisttextThe Congressional District in which the dam is located

Cong_ReptextThe Congressional Representative of that District

PartytextPolitical party of the Congressional Rep.

Owner_TypetextType of owner. F = Federal, S = State, L = Local, U = Public Utility, P = Private, X = Not Listed

Owner_NametextName of the dam owner (if multiple, separated by semicolons)

Year_CompnumberYear in which the original main structure was completed

Year_ModtextYear when major modifications or rehabilitation were completed, includes codes for different types of work (see code sheet)

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Private_DamtextY/N - is the dam privately owned

NPDP_HazardtextPotential hazard to the downstream area resulting from dam failure or misoperation.Taken from Stanford’s “National Performance of Dams Program”.

Permit_AuthtextY/N - does the state regulatory organization have the authority to review and approve plans to construct, modify or abandon dams

Insp_AuthtextY/N - does the state regulatory organization have the authority to require or perform the inspection

Enfrc_AuthtextY/N - does the state regulatory organization have the authority to issue notices to require dam owners to perform necessary maintenance or remedial work, revise operating procedures or take other actions

Juris_DamtextY/N - does the dam meet the state regulatory organization's definition of a jurisdictional dam (see code sheet for definitions)

NID_HeightnumberAccepted as general height of the dam (maximum of dam height, structural height and hydraulic height)

NID_StoragenumberAccepted as general storage of the dam

Dam_LengthnumberIn feet, the length along the top of the dam

Max_DischargenumberNumber of cubic feet per second that the spillway is capable of discharging

Drain_AreanumberIn square miles, the area that drains to a particular point (in this case, the dam) on a river or stream

Dam_DesignertextName of principal firm(s) or agency who designed the dam

(if multiple, separated by semicolon)

EAPtextDoes the dam have an Emergency Action Plan, a plan to reduce the potential for property damage and loss of life in case of dam failure or large flood.

Insp_FreqnumberIn years, the scheduled frequency interval for periodic inspections

St_Reg_DamtextY/N - does the state regulate the dam

St_Reg_AgncytextThe initials of the regulating state agency

VolumenumberTotal cubic yards occupied by materials used in the dam structure

Fed_FundtextCode for the federal agency involved in the funding of the dam

(if multiple, separated by semicolon)

Fed_DesigntextCode for the federal agency involved in the design of the dam

(if multiple, separated by semicolon)

Fed_ContextCode for the federal agency involved in the construction of the dam

(if multiple, separated by semicolon)

Fed_RegtextCode for the federal agency involved in the regulation of the dam

(if multiple, separated by semicolon)

Fed_InsptextCode for the federal agency involved in the inspection of the dam

(if multiple, separated by semicolon)

Srce_AgncytextPrimary federal or state agency responsible for data

Oth_StrucIDtextID for saddle dam or dike associated with larger dam project

Num_StrucnumberNumber of separate structures associated with this dam project

LongitudetextLongitude at dam centerline, in decimal degrees

LatitudetextLatitude at dam centerline, in decimal degrees