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Susitna-Watana Hydroelectric Project Document
ARLIS Uniform Cover Page
Title:
SuWa 286
Geospatial database: Compiled geologic mapping in the area of the
proposed Susitna-Watana Hydroelectric Project, South-Central Alaska
Author(s) – Personal:
D.S.P. Stevens, E.N. Bachmann, and T.C. Wright, D.N. Solie
Author(s) – Corporate:
Alaska Division of Geological & Geophysical Surveys
AEA-identified category, if specified:
Series:
Miscellaneous publication ; 156
Series (ARLIS-assigned report number): Existing numbers on document:
Susitna-Watana Hydroelectric Project document number 286
Published by: Date published:
Fairbanks, AK : State of Alaska, Department of Natural
Resources, Division of Geological & Geophysical Surveys, 2015.
Published for: Date or date range of report:
Volume and/or Part numbers:
Final or Draft status, as indicated:
Document type: Pagination:
Geodatabase 3 p. (summary) + 2.66 GB of
data
Related work(s): Pages added/changed by ARLIS:
Notes:
Not listed on Susitna-Watana documents website. The summary states this geodatabase product
is to support the planning of the Susitna-Watana Hydroelectric Project.
Only the summary is available online from the ARLIS Document Server. For complete
geodatabase content, see the disc.
This document is made available by Alaska Resources Library and Information Services (ARLIS)
on behalf of Alaska Energy Authority for the Susitna-Watana Hydroelectric Project.
All reports in the Susitna-Watana Hydroelectric Project Document series include an ARLIS-
produced cover page and an ARLIS-assigned number for uniformity and citability. All reports
are posted online at http://www.arlis.org/resources/susitna-watana/
Miscellaneous Publication 156
GEOSPATIAL DATABASE:
Compiled Geologic Mapping in the Area of the
Proposed Susitna–Watana Hydroelectric Project,
South-central Alaska
Mapping compiled by:
D.S.P. Stevens, E.N. Bachmann, and T.C. Wright
Bedrock compilation review and revision by:
D.N. Solie, Baseline Geoconsulting, LLC
Published by
STATE OF ALASKA
DEPARTMENT OF NATURAL RESOURCES
DIVISION OF GEOLOGICAL & GEOPHYSICAL SURVEYS
3354 College Road, Fairbanks, AK 99709-3707 907-451-5020
www.dggs.alaska.gov dggspubs@alaska.gov
2015
GEOSPATIAL DATABASE:
Compiled Geologic Mapping in the Area of the Proposed
Susitna–Watana Hydroelectric Project, South-central Alaska
Mapping compiled by:
D.S.P. Stevens, E.N. Bachmann, and T.C. Wright
Bedrock compilation review and revision by:
D.N. Solie, Baseline Geoconsulting, LLC
PROJECT SUMMARY
The Alaska Energy Authority (AEA) in 2010 was authorized by the State of Alaska to begin laying the
groundwork to develop the Susitna–Watana Hydroelectric Project on the Susitna River, Alaska. The
project was intended to help meet the future electrical needs of Alaska’s Railbelt Region by providing
clean, renewable energy at the lowest possible long-term cost. An accurate assessment of the site geology
is important for dam location, design, and construction, as well as for other planning and land management
decisions in the region.
In support of the proposed Susitna–Watana Hydroelectric Project, the Alaska Division of Geological &
Geophysical Surveys (DGGS) developed a Geographic Information System (GIS)-based geologic
compilation of published and unpublished maps for twelve, inch-to-mile (1:63,360-scale) quadrangles
(fig. 1) encompassing the proposed hydroelectric project footprint, including the anticipated reservoir and
surrounding area. DGGS geologists reviewed and analyzed existing geologic mapping for quality and
completeness, and the maps were converted for use in GIS (table 1). The conversion process included
scanning and georeferencing the original hard-copy map documents, creating a geodatabase, digitizing
the geologic data, assigning attributes, and producing a digital data product for public release. The best
available geologic mapping was synthesized into a single compilation data layer, and is packaged along
with georeferenced scans and digitized vector files of the original geologic source maps. Bedrock geology
was reviewed and revised by an independent contractor to ensure consistency with current geologic
interpretations of the area.
This geodatabase product will be a valuable reference resource for developers, planners, and scientists
working on the hydroelectric project, as well as for any other projects in the area.
ACKNOWLEDGMENTS
This capital project was funded by the Alaska Energy Authority (AEA) through the Alaska Department
of Commerce, Community, and Economic Development (DCCED).
MP 156 Page 1
Table 1. Data Sources for Geologic Map Compilation, Proposed Susitna–Watana Hydroelectric Project
DAS01
Kline, J.T., Bundtzen, T.K., and Smith, T.E., 1990, Preliminary bedrock geologic map of the Talkeetna
Mountains D-2 Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Public Data File
90-24, 13 p., 1 sheet, scale 1:63,360. doi:10.14509/1458
DAS02
Smith, T.E., Albanese, M.D., and Kline, G.L., 1988, Geologic map of the Healy A-2 Quadrangle, Alaska:
Alaska Division of Geological & Geophysical Surveys Professional Report 95, 1 sheet, scale 1:63,360.
doi:10.14509/2276
DAS03
Csejtey, Béla, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A.,
Smith, J.G., and Silberman, M.L., 1978, Reconnaissance geologic map and geochronology, Talkeetna
Mountains Quadrangle, northern part of Anchorage Quadrangle, and southwest corner of Healy Quadrangle,
Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000.
http://dggs.alaska.gov/pubs/id/12425
DAS04
Reger, R.D., Bundtzen, T.K., and Smith, T.E., 1990, Geology of the Healy A-3 Quadrangle, Alaska: Alaska
Division of Geological & Geophysical Surveys Public Data File 90-1, 13 p., 2 sheets, scale 1:63,360.
doi:10.14509/1433
DAS05 Clautice, K.H., 1990, Geologic map of the Valdez Creek mining district: Alaska Division of Geological &
Geophysical Surveys Public Data File 90-30, 1 sheet, scale 1:250,000. doi:10.14509/1464
DAS06–
DAS21
Acres, 1982a, Susitna Hydroelectric Project: 1980–81 Geotechnical Report, v. 2, part 2, Appendix G–K, final
draft, 237 p. http://www.arlis.org/docs/vol1/Susitna/0/APA69.html
DAS22 Woodward-Clyde Consultants, 1982, Final report on seismic studies for Susitna Hydroelectric Project, 363 p.
(fig. 3–4). http://www.arlis.org/docs/vol1/Susitna/12/APA1255.pdf
DAS23 Woodward-Clyde Consultants, 1982, Final report on seismic studies for Susitna Hydroelectric Project, 363 p.
(fig. 4–15). http://www.arlis.org/docs/vol1/Susitna/12/APA1255.pdf
DAS24
Merritt, R.D., Eakins, G.R., and Clough, J.G., 1982, Coal investigation of the Susitna Lowland: Alaska Division
of Geological & Geophysical Surveys Alaska Open-File Report 142, 89 p., 4 sheets, scale 1:250,000.
doi:10.14509/62
DAS25
Eakins, G.R., Jones, B.K., and Forbes, R.B., 1977, Investigation of Alaska’s uranium potential: Alaska Division
of Geological & Geophysical Surveys Alaska Open-File Report 109, 213 p., 10 sheets, scale 1:250,000.
doi:10.14509/21
DAS26
Csejtey, Béla, Jr., 1974, Reconnaissance geologic investigations in the Talkeetna Mountains, Alaska: U.S.
Geological Survey Open-File Report 74-147, 48 p., 1 sheet, scale 1:63,360.
http://dggs.alaska.gov/pubs/id/11004
DAS27–
DAS28
Acres, 1982b, Susitna Hydroelectric Project, 1982 Supplement to 1980–81 Geotechnical Report.
http://www.arlis.org/docs/vol1/Susitna/0/APA68.html
DAS29 Richter, D.H., 1963, Geology of the Portage Creek–Susitna River area: Alaska Division of Mines and Minerals
Geologic Report 3, 2 sheets, scale 1:24,000. doi:10.14509/332
DAS30 Woodward-Clyde Consultants, 1982, Final report on seismic studies for Susitna Hydroelectric Project, 363 p.
(fig. 4–21). http://www.arlis.org/docs/vol1/Susitna/12/APA1255.pdf
DAS31
Csejtey, Béla, Jr., Mullen, M.W., Cox, D.P., and Stricker, G.D., 1992, Geology and geochronology of the Healy
Quadrangle, south-central Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1961, 63
p., 2 sheets, scale 1:250,000. http://dggs.alaska.gov/pubs/id/12847
DAS33
Clautice, K.H., Newberry, R.J., Pinney, D.S., Blodgett, R.B., Bundtzen, T.K., Gage, B.G., Harris, E.E., Liss,
S.A., Miller, M.L., Reifenstuhl, R.R., and Clough, J.G., 2001, Geologic map of the Chulitna region,
southcentral Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2001-
1B, 32 p., 1 sheet, scale 1:63,360. doi:10.14509/2771
DAS34 Woodward-Clyde Consultants, 1982, Final report on seismic studies for Susitna Hydroelectric Project, 363 p.
(fig. 4–17). http://www.arlis.org/docs/vol1/Susitna/12/APA1255.pdf
MP 156 Page 2
Figure 1. Map showing 1:63,360-scale quadrangles included in the geologic map compilation
geodatabase: Healy A-2, A-3, A-4, A-5; and Talkeetna Mountains C-2, C-3, C-4, C-5, D-2, D-3,
D-4, D-5. Red dot is location of the proposed dam and powerhouse.
MP 156 Page 3