Kentucky Public Service Commission (PSC), 2004, Electric Transmission Line GIS Data.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
| Value | Definition |
|---|---|
| DIST | Distribution |
| TRAN | Transmission |
| PEND | Pending (Unverified) Data through to be transmisssion |
| NULL | Unknown |
| Value | Definition |
|---|---|
| N | No, line is not underground; it is above ground. |
| Y | Yes, line is underground. |
| S | Line is submerged. |
| Value | Definition |
|---|---|
| N | No, line segment does not connect with different companies. |
| Y | Yes, line segment does connect to other companies. |
| P | Possibly, the line segment might be part of a interconnection with another company. |
| Value | Definition |
|---|---|
| OP | operating |
| PR | proposed |
| UC | under construction |
| IN | inactive |
| Value | Definition |
|---|---|
| AEP 20021120 | Line and substation data came from AEP Smallworld extracts to shapefiles. Extracted shapefiles received at the PSC are dated November 20-21, 2002. Data were in Decimal Degrees, NAD83. The accuracy of the data is 2 meters (or 10 feet.) Correspondence with AEP determined that (1) AEP transmission lines are 34.5 kV and above, although some 34.5 lines are distribution lines, (2) all substations in this data set are transmission stations, (3) AEP is able to respond to requests for information most easily if the "Line Name" is referred to (AEP may make additions and or relocations to a specific line, but the line name remains the same,) and (4) double circuit Lines within the state of Kentucky were named. |
| BR 1999-20011113 | Data were derived from a BREC CAD DWG dated 1999 and received at the PSC November 13, 2001. The projection of the DWG file was unknown (the PSC georeferenced the DWG.) The accuracy of the DWG file was also unknown and appeared to be poor. This source was used only to supplement possible small gaps in more accurate BR 20011105 hardcopy data. In some cases, it was only used as a secondary source for attributes, such as the substation name or whether a substation was owned by BREC or an affilate coop. All substation points from this source were moved to match DRG/DOQQ sites or to meet up with lines from the more accurate BR 20011105 paper maps. Those features that were matched to a DOQQ/DRG site were estimated at 50 feet accuracy; those that were reviewed or edited by BR on a 1:24,000 map with a topographic background were estimated at 250 feet accuracy; the rest were estimated at 1,000 feet accuracy. |
| BR 20011105 | Line and substation data were digitized from approximately 96 1:24,000 quadrangle hardcopy maps supplied by BREC to the PSC on November 5, 2001. Projection varied according to each quad map sheet but the majority of the area covered fell within the Kentucky State Plane South Zone, NAD 27. Accuracy was estimated at 100 feet. If a facility coincided with or was moved to a DRG or DOQQ site, its accuracy was estimated at 50 feet. Subsequent proofing revealed that BREC did not operate many of the substations on the paper maps. Those substations that were owned by an affiliate rural electric cooperative or electric company (as opposed to BREC) were assigned to that coop or company by means of a spatial overlay with the PSC's electric service area coverage. In a July 30, 2002 email, BREC stated that, in general, it operates all the lines depicted on the paper maps. |
| BR 20021021 | On October 21, 2002, the PSC received back BREC's manual edits on regional paper maps designed by PSC for proofing lines, but also showing substations. The maps were adequate for obtaining many attribute edits. Many inset maps were at 1:24,000 with topographic backgrounds and so were also adequate for location edits. However, some maps were at 1:125,000 with few reference base features and so were not particularly adequate for digitizing location corrections. Features drawn by BREC on the 1:125,000 maps were used only as temporary features until better data could be gathered. For spatial data, the accuracy is rated at 100 feet where a 1:24,000 base was annotated and 9,999 feet where a 1:125,000 base with few reference features was annotated. |
| BR 20021118 | On November 18, 2003, the PSC received back from BREC eight manually annotated tabloid-sized 1:24,000 paper proofs of areas with topographic backgrounds where new location data had been added. BREC also sent several detail maps of its own in the area around the Reid plant. The accuracy of these revisions made from these sources was estimated at 250 feet. |
| BR 20040224 | On January 29, 2004, the PSC sent Big Rivers proofing materials for the entire transmission system. Big Rivers sent back in corrections (including interconnection information) by mail on February 24, 2004. |
| CASE* | This source definition refers to various PSC cases. The word CASE will be followed by a specific PSC case number. Spatial data is derived from materials within the case file. |
| CIN 20011107 | The PSC received a Cinergy CAD DWG file on November 7, 2001. The PSC georeferenced the DWG to KY State Plane North, NAD 83. The native data was not very accurate and was estimated at 1,000 feet. In cases where a substation or line was matched or moved to a DRG/DOQQ location, the accuracy was rated at 50 feet. Some line kilovolts were sketched out on a fax map exchange between Cinergy and the PSC. On March 28, 2003, the PSC sent paper proof maps and digital files to Cinergy for proofing but the PSC has not yet received back any revisions. |
| DEP 200011 | Physical locations of facilities were compiled digitally at the former Dept of Environmental Protection (now part of the Environmental and Public Protection Cabinet.) The metadata for this data was dated Nov. 2000. Since this DEP data came from numerous sources, it was used by the PSC only when a feature was not included in a company's data or when a feature was not located by the PSC on the DRG or DOQQ. When the DEP location is not confirmed by a DOQQ or DRG, the data is rated by the PSC at an accuracy of 250 feet. The following notes describe how the data was assembled at the DEP prior to its use at the PSC: Sources of the DEP data included USGS 1:24,000 topographic maps, USGS 1:100,000 topographic maps, actual field survey (Fayette Co only), KY Dept. of Economic Development "Electric Transmission in Kentucky" map (1984), and DOQQs. The primary data sources were 1:24,000 USGS maps. The DOQQs were used to verify the locations and find missing segments. The author said that if there was a discrepancy between the USGS maps and the DOQQs, the DOQQs were used, so the shapefiles would not always line up with the powerlines shown on the USGS maps. The data included the transmission lines but not the distribution system. Some substations were included, but data is incomplete. Although the Enrironmental Protection staff rated these data at 90% accurate, the author says they may include the following kinds of errors: 1. Missing powerlines, and 2. Some lines shown may actually be telephone lines, pipelines, or part of the powerline distribution system. The data do not include any descriptive data such as voltages, owner, source or destination, number of lines/circuits, kind of tower/pole, etc. One line on the map indicates a row of towers or poles - not a single wire or circuit. |
| DOQQ | Features were digitized off the Digital Orthographic Quarter Quadrangles. Accuracy is estimated at 50 feet. |
| DRG | Digitized from a USGS Topographic Quadrangle Digital Raster Graphic. Accuracy is rated at 50 feet. |
| DRG CLEARCUT | The line follows a linear clearcut through an otherwise wooded area on DRG (and connects to or is in the vicinity of a more established line location.) This should be regarded as fairly speculative and might not actually represent an electric transmission line. There are accompanying notes in the comments field. The accuracy is rated at 500 FEET. |
| DRG ROAD | The line has been digitized to trace a road on the DRG. Most of the time, this is a case where an electric line on the DRG approaches a road and then presumably follows the road for a short distance although it is not depicted graphically on DRG. The location of this segment is based on the assumption that the line follows the road but this has not been verified by the company or in the field. For lines less than 3000 feet in length, the accuracy is estimated at 250 feet. For longer lines, the route becomes more speculative. For longer lines, the accuracy is rated at 9,999 foot,and accompanying notes are in the comments field. |
| ECON DEV 1984 | Data comes from the "Economic Transmission in Kentucky" Map produced by the Kentucky Department of Economic Development in 1984. The map was scanned and georeferenced for digitizing by the PSC. Accuracy is rated at 9,999 feet unless locations where matched to the DRG/DOQQ. |
| EKP 20030813 | Data are EKPC shapefiles for transmission lines and substations in Kentucky State Plane South NAD83. PSC file copies are dated August 13, 2003. EKPC said data where supposed to be within 2 meters (10 feet) of accuracy but suspected that this was not the case in all locations. Therefore, the PSC estimated the accuracy at 25 feet. (The source of the EKPC data varies and is described in the comments field for each EKPC record from this source.) EKPC sent fairly complete attribute tables along with the shapefile. Their substation fields included Objectid, Prefix, Name, Coop, Type, and DataSource. Their line fields included Objectid, Prefix, Name, Voltage, Cnd_Size, DataSource, and SHAPE_Leng. The Prefix is a text designation that the company gives each line section/feature to make it unique. |
| EKP 20040213 | Two aerial photo mosaics supplied by EKP to PSC GIS on Feb. 13, 2004 showing route of the proposed transmission line, called the Rineyville tap. The PSC had no jurisdiction over the location of the line and so there is no PSC case number. The PSC functioned as a facilitator only at a public meeting held on March 1, 2004 in Elizabethtown. |
| INTERPOLATED | This is a relatively short straight line (less than 3,000 feet) of unverified location drawn between two known line/point locations. Accuracy is estimated at 2,000 feet. Line should be regarded as somewhat speculative. |
| KU 20011102 | Approximately 349 KU annotated hardcopy USGS 1:24,000 quadrangles were received at the PSC on November 2, 2001, and digitized. The projection varies by quadrangle sheet; sheets are in both Kentucky State Plane North and South zones, NAD 27. Generally speaking, these data are estimated at within 250 feet, since not all of company annotations lined up perfectly with features on DOQQs. In predominantly urban areas, source maps copies where often difficult to read due to dark shading on the copy. In those difficult-to-read areas, the accuracy was estimated at 1,000 feet. In areas where data were matched to the DRG or DOQQ, the accuracy is rated at 50 feet. |
| KU 20030701 | PSC sent regional Kentucky State Plane Single Zone paper proofs focusing on transmission lines but also including substation points and names to KU on February 14, 2003. In July, 2003, KU returned proof maps to PSC with some manual corrections. The corrections predominantly related to the attributes, however, some line segments were also added or modified. Line corrections drawn on 1:24,000 proofs with topographic bases were estimated at 250 foot accuracy, as the earlier KU 20011102 data had been. Lines drawn on the 1:250,000 proof maps with few base reference points were assigned a 9,999 foot accuracy. KU also provided copies of 1:24,000 Austerlitz and Berea quads at this time that had been missing from the earlier KU 20011102 hardcopy map set the PSC had received. |
| LGE 20011107 | The PSC copy of this LGE CAD DGN file is dated November 7, 2001. The PSC georeferenced the DWG to Kentucky State Plane North, NAD 83 The data is rated at 50 feet when modified to match a DOQQ/DRG or Louisville/Jefferson County Information Consortium (LOJIC) data and 2,000 feet when unmodified or generalized to run along nearby road/railroad features. |
| LGEE 20040224 | In February 3, 2004, the PSC sent out proofing materials for the entire Kentucky electric transmission system. LGEE brought revisions to the PSC on February 24, 2004. These included marked up proofing maps from the PSC and interconnection tables provided by the company. |
| LOJIC 20031022 | Locations are derived from Louisville/Jefferson County Information Consortium (LOJIC) shapefiles of lines and substations in the Louisville area in Kentucky State Plane North, NAD 83. PSC file copies are dated October 22, 2003. Accuracy of the data is generally rated at 50 feet. In a few cases, where the LGE 20011107 CAD showed multiple parallel lines, and these lines were placed farther from the LOJIC centerline for cartographic purposes,the accuracy is rated 250 feet. The LOJIC data included no attributes. |
| OVEC 20030429 | The PSC first digitized features from the DRG, Kentucky State Plane North, NAD 27, and checked them against DOQQs. Accuracy was estimated at 50 feet. Attributes were taken from the 1984 Economic Development map and from FERC Form 1. The PSC then sent the company proofs. Proofs arrived back from the company on April 29, 2003. No corrections were made except for one FERC line name. |
| NA | Not applicable--no source. This applies to secondary sources only. |
| Value | Definition |
|---|---|
| Y | Yes, the line will be shown on a PSC proof map. |
| N | The line will not be shown on a PSC proof map. |
502-564-3940 (voice)
502-564-1582 (FAX)
rarowles@ky.gov
This is an inventory of Kentucky's electric infrastructure, which will be used to: 1. Support the Kentucky State Board on Electric Generation and Transmission Siting; 2. Support the Public Service Commission by providing general reference information; 3. Support the Economic Development Cabinet's mission to attract new industry to the state; 4. Assist Kentucky state and local agencies and Federal Emergency Management Agency (FEMA) in emergency management, and 5. Replace the 1984 Electric Transmission Map of Kentucky published by Economic Development with a digital map. Further, this data will be used to: A. Enhance communication between and among utility companies and government agencies; B. Allow specific features to be located; C. Identify the operator of each feature, which is particularly critical in emergency situations; and D. Make a "smart" database so that the information that is already being collected by federal agencies can be identified and illustrated. This includes buses used for power flow modeling, transmission lines, and substation names.
Location accuracy for line is variable. Some companies supplied data to the PSC that was within 2 meter accuracy. Some lines were located on a Digital Raster Graphic (1:24,000) or Digital Orthographic Quadrangle (1:12,000). Some data was derived from a poorly-georefenced 1984 Economic Development map or from a locationally inaccurate CAD file. Consult the "ACCURACY" field for an estimation in feet of the accuracy of each feature and the "SOURCE1" and "SOURCE2" fields for the primary sources of the data record.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- Formal documentation of all requests is required. Data must be requested in writing, including a signature, printed name, company/firm name if applicable, mailing address, phone number and e-mail address. Send letter to Ruth A. Rowles, Public Service Commission, PO Box 615, Frankfort, KY 40601.
- Use_Constraints:
- The user should understand that since September 11, 2001, location data of critical utility structures is considered sensitive information for security reasons. Users should not publish this data or maps made using this data on the world wide web. Users should not redistribute this data to others, but should refer requests by others for such information to the Kentucky Public Service Commission. The user should give credit to the Kentucky Public Service Commission (PSC). The user must abide by the following data disclaimer: All information within the product is believed accurate but is not guaranteed without error. While attempts have been made to insure the correctness of the information presented, neither the Kentucky Public Service Commission or any party involved in the creation and compilation of the data guarantees their accuracy, completeness, or suitability for a particular use. All critical information should be independently verified.
502-564-3940 (voice)
502-564-1582 (FAX)
rarowles@ky.gov
Offline Data
| Data format: | Size: 1.100 |
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Data must be requested in writing, including a signature, printed name, company/firm name if applicable, mailing address, phone number and e-mail address.
502-564-3940 (voice)
502-564-1582 (FAX)
rarowles@ky.gov
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Revised October 4,
2004