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Author: Bancroft Library
Publisher:
ISBN:
Category : America
Languages : en
Pages : 694
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Book Description
Author: Bancroft Library
Publisher:
ISBN:
Category : America
Languages : en
Pages : 694
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Book Description
Author:
Publisher:
ISBN:
Category : Genealogy
Languages : en
Pages : 728
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Book Description
Author: R.R. Bowker Company. Department of Bibliography
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2352
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Book Description
Author: William Thorndale
Publisher: Genealogical Publishing Com
ISBN: 0806311886
Category : Census districts
Languages : en
Pages : 453
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Book Description
Genealogical research in U.S. censuses begins with identifying correct county jurisdictions ??o assist in this identification, the map Guide shows all U.S. county boundaries from 1790 to 1920. On each of the nearly 400 maps the old county lines are superimposed over the modern ones to highlight the boundary changes at ten-year intervals. Accompanying each map are explanations of boundary changes, notes about the census, & tocality finding keys. In addition, there are inset maps which clarify ??erritorial lines, a state-by-state bibliography of sources, & an appendix outlining pitfalls in mapping county boundaries. Finally, there is an index which lists all present day counties, plus nearly all defunct counties or counties later renamed-the most complete list of American counties ever published.
Author: Albert C. T. Antrei
Publisher:
ISBN: 9780913738429
Category : Sanpete County (Utah)
Languages : en
Pages : 435
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Author:
Publisher:
ISBN:
Category : Genealogy
Languages : en
Pages : 872
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Author: Charles Manning Walker
Publisher:
ISBN:
Category : Athens County (Ohio)
Languages : en
Pages : 644
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Author: Martha Sonntag Bradley
Publisher:
ISBN: 9780913738177
Category : Beaver County (Utah)
Languages : en
Pages : 404
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Book Description
Author: Paul Inkenbrandt
Publisher: Utah Geological Survey
ISBN: 1557918910
Category : Base flow (Hydrology).
Languages : en
Pages : 122
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Book Description
This 116-page report presents the results of an investigation by the Utah Geological Survey of land subsidence and earth fissures in Cedar Valley, Iron County, Utah. Basin-fill sediments of the Cedar Valley Aquifer contain a high percentage of fine-grained material susceptible to compaction upon dewatering. Groundwater discharge in excess of recharge (groundwater mining) has lowered the potentiometric surface in Cedar Valley as much as 114 feet since 1939. Groundwater mining has caused permanent compaction of fine-grained sediments of the Cedar Valley aquifer, which has caused the land surface to subside, and a minimum of 8.3 miles of earth fissures to form. Recently acquired interferometric synthetic aperture radar imagery shows that land subsidence has affected approximately 100 mi² in Cedar Valley, but a lack of accurate historical benchmark elevation data over much of the valley prevents its detailed quantification. Continued groundwater mining and resultant subsidence will likely cause existing fissures to lengthen and new fissures to form which may eventually impact developed areas in Cedar Valley. This report also includes possible aquifer management options to help mitigate subsidence and fissure formation, and recommended guidelines for conducting subsidence-related hazard investigations prior to development.
Author:
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 784
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