A Guide To Information On Benchmarks In Delaware
| Author(s) | Schenck, W.S. | |
| Date Accessioned | 2008-05-22T14:05:22Z | |
| Date Available | 2008-05-22T14:05:22Z | |
| Publication Date | 1982-03 | |
| Abstract | To conduct an elevation survey, a surveyor needs a starting point for which the exact elevation above mean sea level is known. These starting points are called benchmarks. State and federal agencies install benchmarks throughout every State, creating a network of elevation points which covers the entire continental United States. These benchmarks are considered to be permanent, and usually consist of a brass, bronze, or aluminum disc about 4 inches in diameter mounted in a cement post or in a drill hole in a permanent foundation. Each benchmark also has the installing agency's name and an identification number stamped into it. In December of 1980 the Federal Emergency Management Agency (FEMA) allotted the State of Delaware funds to determine the number and condition of federal benchmarks and other elevation reference control points. The National Flood Insurance Program (NFIP), contained within FEMA, requires accurate flood surveys of property in flood-prone areas. An extensive and accurate benchmark network throughout the State is needed to help meet these needs. | en_US |
| Sponsor | The work that provided the basis for this publication was supported by funding under a cooperative agreement with the Federal Emergency Management Agency. The substance and findings of that work are dedicated to the public. The author and publisher are solely responsible for the accuracy of the statements and interpretations contained in this publication. Such interpretations do not necessarily reflect the views of the federal government. | en_US |
| URL | http://udspace.udel.edu/handle/19716/3202 | |
| Language | en_US | en_US |
| Publisher | Newark, DE: Delaware Geological Survey, University of Delaware | en_US |
| Part of Series | Open File Report | en_US |
| Part of Series | 17 | en_US |
| Keywords | benchmarks in Delaware | en_US |
| Keywords | elevation survey | en_US |
| Keywords | surveyor | en_US |
| Keywords | elevation above mean sea level | en_US |
| Title | A Guide To Information On Benchmarks In Delaware | en_US |
| Type | Technical Report | en_US |