ML20080B396

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Brief Aerial Photography Analysis of River Bend Station at St Francisville,LA:1993-94
ML20080B396
Person / Time
Site: River Bend Entergy icon.png
Issue date: 11/30/1994
From:
AFFILIATION NOT ASSIGNED
To:
Shared Package
ML20080B372 List:
References
NUDOCS 9412020147
Download: ML20080B396 (7)
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, Enclosure 1 PHOTOINTERPRETATION REPORT (AERO DATA CORPORATION 94-2288)

A BRIEF AERIAL PHOTOGRAPHY ANALYSIS OF RIVER BEND STATION AT ST. FRANCISVILLE, LOUISlANA:

1993-1994 By Aero-Data Corporation 9213 Interline Avenue Baton Rouge, LA 70809-1908 Phone: (504) 927-5725 Submitted to:

Entergy Services, Inc.

River Bend Station P.O. Box 220 St. Francisville, LA 70775 November 1994 PRIVILEGED AND CONFIDENTIAL PAGE 10

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Enclosure 1 m

TABLE OF cot #ENTS ,

I 1.0 EXECUTIVE

SUMMARY

l 1.1 METHODS AND MATERIALS 1.2

SUMMARY

OF PRELIMINARY FINDINGS APPENDIX A - Photo inventory PAGE 11

L Enclosure 1 1.0 Executive Summary Aero-Data Corporation (ADC) has contracted with the Entergy River Bend Station to conduct a photo mission covering at least a two mile radius around the facility near St. Francisville, Louisiana. ADC has been providing annual plant site documentation of the facility since 1985.

This year ADC was requested to produce photographs of the facility, but not a photomosaic. The current photography was compared to the previous years photography in order to identify any changes in the number of wellheads and/or pipelines surrounding the site. Changes in vegetation within the facility boundary were also identified.

The deliverables for this project include contact prints of each frame (24), a color plot showing the 1993-1994 changes, a color plot containing the frame center for each of the photographs from the current flight, and this interpretation report.

1.1 Methods and Materials The current photo mission was flown on November 6,1994 at a scale of 1"=1,500' using false color infrared (CIR) film. The frame centers of the 1994 photographic coverage are very similar to those flown by ADC for Gulf States Utilities in 1993. The previous photo mission was flown on September 30,1993 also at a scale of 1"=1,500' and using CIR film.

ADC's flight planning was simplified with the use of a Geographic Information Systems (GIS) software package which aided in the aligriment of the flight lines. With this system, four flightlines were selected aid 24 frames of film were shot for this photo mission. Navigation was by our GPS navigation and moving mbp equipment.

Contact prints for both the current and 1993 dates were produced at a scale of 1"=1,500'. The prints for both dates v.ere analyzed on a large mirror stereoscope for change detection.

I The change map of the River Bend facility was produced using a Geographic 1 Information System. The GIS incorporated computer scanned imagery of PAGE l' l

Enclosure 1 the 1993 and 1994 photo missions as well as digitized vector data.

Comparison of the current photography with the 1993 photography by photointerpretation revealed no new changes, such as new pipelines, wellheads, or vegetation removal.

ADC also constructed a map showing the frame centers, frame numbers, and latitude /loncit ide coordinates of each frame. This map was created from 1990 TIGER digital line data acquired from the U.S. Department of Commerce, Bureau of the Census in CD-ROM format. The Tiger data is useful for reference purposes, supplementing the outdated U.S. Geological Suivey 7.5 minute quadrangle map data available for the area of interest (the Port Hudson quad map was last updated in 1980; the St. Francisville quad in 1972). In terms of accuracy, the scale of TIGER data is 1:100,000 and may be anywhere from 50 to 140 feet off; whereas the 7.5 minute quads have a scale of 1:24,000 and may be up to 40 feet off.

Aero-Data can map the area from the current photography and produce a current map which will surpass the accuracy of USGS quadrangle sheets should it be requested. The above referenced map should be used to select the specific frames which provide coverage within the site area.

1.2 Summary of Preliminary Findings No changes in the number or size of wellheads, pipelines or transmission line right-of-ways were identified during the interpretive phase of this  !

project. There are no significant changes in vegetation in the area  !

immediately surrounding the cooling towers. The small patches of bare l ground within the site boundary that were present on the 1993 photos are l now covered by ground vegetation. The area surrounding the Entergy River j Bend facility has not changed significantly since the 1993 photo mission. i 1

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. ~ Enclosure 1-Appendix A: Photo inventory ,

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C2A Rag flama Jimme Mala _ Data Meta ssals I28A SnaJane haleeLha. Str sLhamas 357 91029 69 67 10/11/91 15840. CIR GSU Riverbend 1079 9 357 91040 11/10/91 15840 . CIR GSU Riverbend 103 357 92043 2706 2718 9/30/92 18000 CIR GSU RNerbend 1392 11 357 92043 2720 2724 9/30/92 18000 CIR GSU Riverbend 1392 5 357 92043 2727 2736 9/30/92 18000 CIR GSU Riverbond 1392 9 357 92043 2746 2762 9/30/92 18000 CIR GSU Norbend 1392 7 i

357 93041 4571 4578 9/30/93 18000 CIR GSU RNerbond 1791 8 357 93041 4579 4587 9/30/93 18000 CIR GSU Riverbend 1791 9 3 i

357 93041 4588 4596 9/30/93 18000 CIR GSU ITiverbond 1791 8

  • 357 93041 4596 4604 9/30/93 18000 CIR GSU Riverbend 1791 9 ,

432 94034 1627 1632 11/6/94 18000 CIR Riverbend. Erdergy 2288 8 432 94034 1633 1640 11/6/94 18000 CIR Riverbend, Erdergy 2288 '8  !

432 94034 1641 1648 11/6/94 18000 CIR Riverbend, Erdergy 2288 4 432 94034 1649 1660 11/6/94 18000 CIR Riverbend. Erdergy 2288 12 i

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Map compiled by Aero-Data Corp. Baton Rouge, LA  ;

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