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Table 3.112. Subsurface Void Space Vulnerability Analysis
County
Lead/
Zinc Cat. I
Acres
Coal
Category I
Coal
Category II
Coal
Category III
Limestone
Category I
Limestone
Category II
Limestone
Category III
Gypsum
Category II
Mitigation Planning Region L
Johnson 209 209 277 695 1,322
Leavenworth 1100 40 40 40 1,220 1,340
Wyandotte 394 323 347 1,064 2,175
Subtotal 0 0 0 1100 643 572 664 0 0 0 0 0 0 2,979 4,837
Source: Data from KDHE, “Subsurface Void Space and Sinkhole/Subsidence Area Inventory for the State of Kansas” November 2006; Data tabulated and assigned weighted
scores by AMEC; Void Space Unknown indicates that known coal mines are present. However subsurface void space is not known
Salt Solution
Category I
Salt Solution
Category II
Salt Solution
Category III
Rock Salt
Category III
Hydrocarbon
Storage
Category III
Total Subsurface
Void
Space
Weighted
Calculation
Table 3.113. Top 10 Counties Vulnerable to Land Subsidence According to Weighted Calculation
Mitigation
Planning
Region County
Total Sub-surface
Void Space
Weighted
Calculation
H Crawford 69,000 150,100
H Cherokee 33,769 85,753
J Osage 4,000 8,000
G Reno 2,889 3,949
L Wyandotte 1,064 2,175
F Ellsworth 2,134 2,158
G Rice 1,141 1,350
L Leavenworth 1,220 1,340
L Johnson 695 1,322
E Barber 520 1,040
Source: State Hazard Mitigation Plan
Weighted Calculation: With the known number
of acres in each risk category for each county
with documented subsurface void spaces, a
weighted vulnerability calculation was
completed. Acreage in risk Category I (High
Risk) received a multiplier of three, acreage in
risk Category II (Moderate Risk) received a
multiplier of two and acreage in risk Category III
(Low Risk) received a multiplier of one.
3.195