NOAA s Role in Charting Pipelines & Current Datasets

Transcription

1 NOAA s Role in Charting Pipelines & Current Datasets Nautical Data Branch (NDB), Marine Chart Division Lance Roddy & Nick Szelak March 12, 2019

2 Major Topics NOAA chart products Major pipelines for pipeline data Basic charting policy USACE-permitted pipelines (state waters) BSEE-authorized pipelines (seaward of 3NM limit/boundary) Questions

3 NOAA Chart Products - Pipeline Locations NOAA ENC Electronic Navigational Charts Vector nautical chart data built for modern navigational systems updated weekly NOAA Raster Charts Paper Nautical Charts Full-size Nautical Charts Booklet Charts NOAA RNC - Raster Navigational Charts RNC Tile Service

4 NOAA Navigational Products Refer to ENCs & raster charts, but consider the following: ENCs provide the most up-to-date information, whereas paper and raster nautical chart updates may be up to one month behind the corresponding ENC coverage.

5 Charting Pipelines - Documentation The Marine Chart Division depicts individual pipeline symbols and pipeline areas on navigational products because we received as-built documents. If a pipeline exists, and we did not receive the as-built information, then the pipeline is uncharted. If there is a change in the status of an existing, charted pipeline, and we did not receive the as-built information associated with the change in status, then the charted pipeline symbol will remain the same.

6 Major Pipelines for Pipeline Data In State Waters: Nautical Data Branch examines USACE permits and solicits pipeline project status via annual mailing to USACE permittee. Outside State Waters (seaward of 3NM limit/boundary): Pipeline operators send construction letters to Nautical Data Branch, which initiates download of pipeline data from the BSEE website.

7 USACE Pipeline Data From Permit to Chart Examine permit or public notice and determine chart applicability. Enter permit data into NDB-internal USACE Permits Database. Mail a Permit/Public Notice Status Report to permittee annually. Await permittee s reply and provision of as-built data. Combine as-built data and USACE permit/public notice in a source document record. Use the source document record to add, revise, or remove the pipeline symbol or pipeline area symbol on the charts.

8 Pipeline Data Information for Charting Pipeline completion date Pipeline operator USACE permit documentation Survey method: DGPS, GPS, etc. Lat/Lon or state plane coordinates of pipeline with horizontal datum (NAD27, NAD83, etc.) Sufficient number of coordinates to accurately depict a pipeline symbol on the charts

9 General Charting Guidelines In open water (Gulf of Mexico), the individual pipeline symbol is used. However, across more confined waterways such as rivers and inland bays, the pipeline area symbol can be used. If the pipeline information supplier has provided accurate DGPS positions, we can chart the feature with an individual pipeline symbol.

10 General Charting Guidelines Pipeline Positioning Accomplished with DGPS Pipeline Channel Not to Scale

11 General Charting Guidelines Pipeline Positioning Accomplished with GPS Pipeline Area Pipeline 330 feet 330 feet Channel Not to Scale

12 General Charting Guidelines Pipeline Positioning Accomplished with GPS Pipeline Area Channel Not to Scale

13 General Charting Guidelines Pipeline Positioning Accomplished without GPS or DGPS Pipeline Area Pipeline 500 feet 500 feet Channel Not to Scale

14 General Charting Guidelines Pipeline Positioning Accomplished without GPS or DGPS Pipeline Area Channel Not to Scale

15 Pipeline Area Bayou Teche, LA Portion of of Chart US5LA23M Not to Scale

16 Pipeline Area Bayou Teche, LA Portion of Chart Not to Scale

17 Caution Note Examples

18 Charting Considerations Inaccuracies in charted pipeline positions may exist due to retired cartographic methods such as applying pipelines by hand on Mylar. Additional inaccuracies may exist due to the quality of older, hand-drawn, as-built data that was applied to the chart. Many pipeline symbols on the ENCs were derived from the existing pipeline symbols depicted on the raster charts. Current cartographic practices require the cartographer to apply the digital pipeline data directly to the ENC.

19 BSEE Pipelines From Construction Letter to Chart Receive construction letter from pipeline operator and determine chart applicability. Enter pipeline metadata into NDB-internal BSEE Pipeline Database. Check the BSEE website database for change in segment status. Download pipeline segment data from BSEE website upon change to BSEE Status Active or other chartable status. Combine segment data and construction letter in a source document record. Use the BSEE data in the source document record to add, revise, or remove the pipeline symbol on the charts.

20 To chart or not to chart BSEE pipelines? In some circumstances, no charting action will be taken if: At the scale of the largest-scaled chart, the pipeline s length is less than half of a pipeline symbol. The pipeline is already charted. The largest-scaled chart that the segment falls on doesn t show pipelines. There is a Gas and Oil Well Structures caution note present.

21 BSEE Pipelines - Offshore Louisiana

22 Pipeline Symbols on NOAA ENC Portion of Chart Not to Scale Portion of US3GC04M Not to Scale

23 Pipeline Symbols on NOAA ENC Portion of Chart Not to Scale

24 Conclusion