Crawford, N.E.Montayne, SimoneStokes, T.B.Hubbard, T.D.2026dataRaw Data FileRDF 2025-18 v. 2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys7 p.https://doi.org/10.14509/32137Catalog of drill log cards and sample images from USGS seismic shothole sites in the National Petroleum Reserve - Alaska (1974-1981), Raw Data File 2025-18 v. 2, presents transcribed drill card data and photographs of geologic samples from seismic shotholes in the National Petroleum Reserve - Alaska (NPR-A). Between 1974 and 1982, more than 12,000 line miles of seismic data were acquired in the reserve (U.S. Geological Survey [USGS], 2019), and USGS geospatial data show the approximate locations of 99,850 holes, up to 175 feet deep, drilled for emplaced seismic charges. At each site, drillers logged the hole and collected grab samples of material brought to the surface. Drill cards and samples from roughly 35,650 of these sites, drilled between 1974 and 1981, are archived at the Alaska Geologic Materials Center (GMC) in Anchorage. Using these materials, the Alaska Division of Geological & Geophysical Surveys (DGGS) photographed the cards and samples and tabulated transcriptions of drillers' observation notes from approximately 26,000 of the sites, which fall within a data extent of almost 100,000 km2. This subset is the portion of the archive closest to North Slope communities and potential infrastructure development. The dataset is foundational to a broader initiative to modernize and enhance the NPR-A seismic shothole sample dataset, and it supports local and regional efforts to identify economically viable sand and gravel deposits. These data and accompanying discussion are released as a DGGS Digital Data Series publication, and all publication components are available from the DGGS website at https://doi.org/10.14509/32137.This dataset supports discoverability and reuse of historical seismic shothole records from NPR-A. It provides photographs of drill cards and geologic samples and transcribed driller notes from approximately 26,000 shothole sites drilled between 1974 and 1981 to facilitate identification of sand and gravel resources and planning for infrastructure development on the North Slope.The NPR-A seismic shothole dataset offers a unique regional record of shallow subsurface materials on the North Slope that would be cost prohibitive to replicate, and while it cannot support quantitative modeling, it provides a starting point for further investigation and informed infrastructure planning. >shothole_sample_catalog: Geodatabase containing seismic shotline and shothole locations (USGS, 2019), links to shothole sample images, and drill card shothole descriptions.19741981publication datePlannedIrregular-161.866072-151.05679971.37039268.299655ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysAlluvialArchiveBedrockCoalDatabaseDGGSDrill CardsDrill LogsDriller NotesDrillingExplorationGeodatabaseGeologicGeologic MaterialsGeospatial DataGeotechnicalGrab SamplesGravelHistorical DataInfrastructure DevelopmentInterval DepthLegacy DataPermafrostRegionalResource AssessmentResourcesSample ArchiveSample ImagesSample LocationSample Location MapSandSand and GravelSeismic ShotholesShaleShallow SubsurfaceShotholeShotlineSubsurfaceSurfaceSurficialSurficial DepositsSurficial GeologyTransportationAlaska Division of Geological & Geophysical SurveysAvak RiverAvalik RiverAwuna RiverBarrow Mining DistrictChandler RiverColville Mining DistrictColville RiverEtigonik MountainKaolak RiverKetik RiverKigalik RiverKillik RiverKogosukruk RiverKokolik RiverKuna RiverMeade RiverNational Petroleum Reserve in AlaskaNational Petroleum Reserve-AlaskaNorth SlopeNorth Slope BoroughNPRAReindeer LakeReubens PeakSinclair LakeSinclair RiverSmith Mountain LakesSwayback MountainTitaluk RiverTopagoruk RiverUmiat LakeUsuktuk RiverWainwright Mining DistrictWalakpa RiverThis report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.Alaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical

3354 College Road

FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.The State of Alaska funded this work through the Arctic Strategic Transportation and Resources (ASTAR) Capital Improvements project. The U.S. Bureau of Land Management provided additional funding and support through an Alaska NPR-A Resource Inventory and Database Development Grant (L18AC00019). We greatly appreciate Amber Rhodes, Brayton Keith, Zach Spath, Kjol Johnson, and Tyler Stokes for their time and effort in reviewing samples and entering data. Tyler Stokes spent countless hours photographing samples and correcting sample label metadata against the USGS shotline and shothole dataset. We thank Jean Riordan, Kurt Johnson, and Chris Ramey for supporting the GMC database and retrieving the samples. Additionally, we thank Anthony T. Gallagher for building the initial database, and Susan Seitz and Michael Hendricks for their guidance on database design.Haralson, M.D.Hubbard, T.D.Montayne, Simone2023Raw Data FileRDF 2023-4Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/30961Crawford, N.E.Hubbard, T.D.Walser, S.L.Wilson, S.Y.Diaz, A.V.2026Raw Data FileRDF 2026-7Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/32060Daanen, R.P.Stokes, T.B.2023Raw Data FileRDF 2023-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys19 phttps://doi.org/10.14509/30954Haralson, M.D.Hubbard, T.D.Hoffman, H.A.Montayne, Simone2023Raw Data FileRDF 2023-13Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/31011Hubbard, T.D.Jose, Aleena MerinCrawford, N.E.Walser, S.L.Haralson, M.D.Carbaugh, R.M.2026Raw Data FileRDF 2026-2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/31806Tannenbaum, T.G.Speeter, G.G.Hubbard, T.D.2024Preliminary Interpretive ReportPIR 2023-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys72 phttps://doi.org/10.14509/30960Germann, J.T.Daanen, R.P.2022Raw Data FileRDF 2022-15Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/30915Gavel, M.M.Hubbard, T.D.2021Report of InvestigationRI 93-1AFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys6 phttps://doi.org/10.14509/30670Crawford, N.E.Walser, S.L.Jose, Aleena MerinHubbard, T.D.Stokes, T.B.Wilson, S.Y.Gavel, M.M.Montayne, Simone2025Raw Data FileRDF 2025-3Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys159 phttps://doi.org/10.14509/31457Germann, J.T.Daanen, R.P.Stokes, T.B.Wikstrom Jones, K.M.2024Raw Data FileRDF 2023-21Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/31044Haralson, M.D.Hubbard, T.D.Montayne, Simone2023Raw Data FileRDF 2023-5Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/30962Buzard, R.M.Heiner, DanielOverbeck, J.R.Glenn, R.J.T.2021Raw Data FileRDF 2021-18Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/30791Haralson, M.D.Hubbard, T.D.Hoffman, H.A.Montayne, Simone2023Raw Data FileRDF 2023-12Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/31010Herbst, A.M.Daanen, R.P.2022Raw Data FileRDF 2022-10Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys8 phttps://doi.org/10.14509/30870Hubbard, T.D.Jose, Aleena MerinCrawford, N.E.Walser, S.L.Haralson, M.D.Carbaugh, R.M.Wilson, S.Y.Milo, Amit2026Raw Data FileRDF 2026-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/31805Attribute accuracy of the lithologic descriptions is variable. Collecting detailed subsurface data was outside the scope of the NPR-A seismic program, so drill card descriptions are inconsistent, and many cards are missing, damaged, or illegible. Gravel is likely significantly overrepresented because drillers used overlapping terms for coarse-grained alluvial and colluvial materials and crushed bedrock, and shallow coal is rarely noted but appears to be widespread. The data are not suitable for quantitative resource estimates, and users should review the drill card and sample images directly and not rely solely on the transcribed text.Each shothole record is linked by shotline and shothole number to its location in the USGS NPR-A legacy seismic data archive, its sample images, and, where present, its drill card transcription. Catalogers verified that each drill card matched its sample bag label and could be linked to the sample identifiers in the USGS archive record. Sample labels were corrected against the USGS shotline and shothole dataset. Transcribed text reproduces the original driller notes, with obvious spelling errors corrected, text standardized to lowercase, and multiline entries combined into single lines. Where interval depths were not recorded but a total hole depth was given, the interval top was assumed to be zero and the bottom was assumed to be the total depth. Cards with no depth information are flagged interval missing. Shorthand and terminology were not standardized to a controlled vocabulary, so lithologic terms are inconsistent across records.The dataset is incomplete relative to the full NPR-A seismic program. USGS data show approximately 99,850 shotholes drilled between 1974 and 1982 (USGS, 2019). Drill cards and samples from roughly 35,650 of these sites are archived at the Alaska Geologic Materials Center, and this dataset covers approximately 26,000 of them, the portion closest to North Slope communities and potential infrastructure development. Only about half of the selected samples have a drill card, and many cards are missing, damaged, or difficult to read. Records without a card have no transcription, and cards lacking depth information are flagged interval missing. Only key data (mainly interval depths and material characteristics) were transcribed.Horizontal positional accuracy has not been quantified. Shothole locations were established during seismic surveys in 1974 to 1982, before GPS was available, and were located with survey and navigation methods of that era. This dataset uses the locations obtained from the USGS dataset and did not independently verify them. Locations may be offset from the true drill sites by 100s of meters or more, and errors may vary by shotline, survey contractor, and year. Users who need precise locations should not rely on these coordinates alone.Sample location, cataloging, and photography - Geologic material samples and drill cards from individual shothole drill locations, collected during NPR-A seismic investigations (1974 to 1981), were stored in labeled sample bags in boxes at the Alaska Geologic Materials Center (GMC). Staff located specific boxes using the GMC online inventory database, which lists the shotline number, shothole number, and box identification barcode. Sample bags within each box were labeled with the shothole and shotline numbers. Staff obtained the geographic location of each sample and shotline from the NPR-A Legacy Seismic Data Archive (USGS, 2019), reviewed each box label, and compiled cataloging information for each shothole sample. Catalogers verified that each drill card (when present) matched the sample bag label and could be linked to the sample identifiers in the USGS archive record. They placed the drill card and sample bag on a flat surface, disaggregated the sample, arranged it on a glass plate with the bag beside it, and photographed the setup. When applicable, they spread the sample material across plates to capture key sediments, such as pebbles or coal fragments. After photographing, they returned the samples to their original bags and boxes at the GMC.2025Drill card transcription - Staff reviewed photographs of shothole drill cards (present for roughly half of the selected samples) and transcribed key data useful for geologic material resource exploration, particularly interval depths and material descriptions. Original text was not altered or interpreted, except to correct obvious spelling errors and standardize text to lowercase. Multiline interval descriptions were combined into single lines. Where interval depths were not recorded but a total hole depth was given, the interval top was assumed to be zero and the bottom the total depth. Shorthand was not mapped to a controlled vocabulary because the notes were too ambiguous and incomplete for reliable classification.2026vectorWGS84WGS 846378137298.257223563rdf2025_018_v2_shothole_sample_catalog.gdbGeodatabase containing seismic shotline and shothole locations (USGS, 2019), links to shothole sample images, and drill card shothole descriptions.this report, DGGS staff; shotline and shothole locations from USGS (2019)shothole_sample_catalogAlaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical

3354 College Road

FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.RDF 2025-18 v. 2The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.Contact DGGS for current pricingdatabasehttps://doi.org/10.14509/32137Free download20261104Alaska Division of Geological & Geophysical SurveysSimone MontayneMetadata Managermailing and physical

3354 College Road

FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.https://dggs.alaska.gov/metadata/dggs.extdggs metadata extensions