Summary Statistics for the GIS Surface Effects Map Archive

View Maps of the Nevada Test Site: Testing Areas Detonation Sites Composite Surface Effects 

Feature Type

Number
of
Features

Cumulative Length

Maximum Length

(feet)

(meters)

(feet)

(meters)

Yucca Flat Testing Area
Crack 47,500 5,793,358 1,765,816 2,509 765
Crack within sink 3,132 396,285 120,788 1,150 351
Fault 1,283 384,426 117,173  7,378 2,249
Fault within sink 126 34,328 10,463 1,526 465
Pressure Ridge 183 51,053 15,561 1,640 500
Pressure Ridge within sink 20 3,883 1,184 719 219
Sink 673 756,652 230,628 4,379 1,335
Sink within sink 17 6,997 2,133 673 205
Carpetbag Fault 191 68,336 20,829 5,514 1,681
Yucca Fault 458 235,894 71,900 7,837 2,389

Subtotal

 53,583 7,731,212 2,356,475    
Sink (symbol) 2,285 130,702 39,838 155 47
Sink within sink (symbol) 15 761 232 90 27

Pahute Mesa Testing Area
Crack 15,389 2,137,145 651,402 6,745 2,056
Crack within sink 230 16,951 5,167 536 163
Fault 719 679,131 206,999 15,865 4,836
Fault within sink 3 475 145 277 84
Pressure Ridge 334 120,994 36,879 3,319 1,012
Pressure Ridge within sink 1 465 142 465 142
Sink 24 40,908 12,469 3,236 986

Subtotal

 16,700 2,996,069 324,672    
Sink (symbol) 127 7,815 2,382 102 31

Other Testing Areas

Crack 5,600 275,073 83,842  1,227 374
Crack within sink 2 53 16 35 11
Fault 321 49,875 15,202 1,452 443
Fault (known) 204 72,720 22,165 3,687 1,124
Fault (known, concealed) 41 25,617 7,808 2,034 620
Fault (known, uncertain) 14 10,442 3,183 2,515 767
Sink 11 10,896 3,321 2,594 791

Subtotal

6,193 444,676 135,537    
Sink (symbol) 49 1,695 517 61 19
Totals 78,952 11,312,930 3,448,181    

Notes:

  1. Listed are summary statistics for the three principal databases of the GIS Surface Effects Map Archive. The databases contain all surface effects maps for detonations conducted in the Yucca Flat, Pahute Mesa, and Other testing areas of the NTS. Given for each testing area and feature type are: (1) Number of features, (2) Cumulative Length (all features of each type), and (3) Maximum Length (length of longest feature of each type). Lengths are provided in both feet and meters. The total number of features and cumulative lengths are given for each testing area (subtotals) and for all three testing areas (totals). 

  2. Sink (symbol) and Sink within sink (symbol) are hachure marks for “Sink” and “Sink within sink” features, respectively. Summary statistics for the symbols are separated from the actual mapped surface effects and not included in the subtotal given for each testing area; however, the totals do include these symbol features.

  3. How to separate the sink features and sink symbols: Sink features and sink symbols are both identified as Feature type “Sink” in the GIS databases. Similarly, sink within sink features and sink within sink symbols are identified as Feature type “Sink within sink.” The distinguishing characteristic is that sink symbol and sink within sink symbol features have the attribute “Symbol (sink hachure)” in the Label field of the databases. This unique identifier can be used to differentiate these symbol features from collapse sinks for mapping and analysis operations.