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use regulations should be enacted by Cumberland Township to protect the aquifer recharge
area. (Portions of Cumberland Township are currently served by the Gettysburg Municipal
Authority water supply and additional areas of the township may be served in the future.)
Although the area is underlain by the "Gettysburg" Triassic sediment formation, good well
locations should be found where rock fractures are indicated. In a recent study, five specific
well locations were identified with the potential for supplying up to 0.5 mgd or more.'
These well locations are illustrated in Figure 3.93.
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Other sources of information on water supplies in Adam County may be found in State
p~blications.~~~
Mid-County West and North - Gettysburg Plain: This broad area extends southwest to
northeast across most of the county, including portions of Liberty and Freedom Townships
to the southwest; Highland, Cumberland, and Franklin Townships to the west; and Butler,
Tyrone, and Huntington Townships to the north of Gettysburg. The potential for obtaining
adequate supplies of acceptable quality water throughout this "Gettysburg Plain" area
underlain by the Gettysburg Triassic Formation should be similar to the potential near
Gettysburg itself, as illustrated in Figure 3.9.3. The water yields from current wells range
from 1 to 630 gallons per minute (gpm) with a median for residential wells of 12 gpm and
for commercial wells of 69 gpm. The water is generally hard and may have iron and other
constituents above recommended values
Mid-County South and East - Bonneauville and the Route 15 Comcior area.- This extensive
area LUIS from Mount Joy Township in the south, northeast through portions of Mt.
Pleasant, Strabaa, Hamilton, and Reading Townships east of Gettysburg. Most of this area
is underlain by Triassic sedimentaq rock, but a narrow Diabase formation with poor water
yields runs diagonally across the county from southwest to northeast between Bonneauville
and Gettysburg. The Borough of Bonneauville is served by 6 wells and is at or over its
currently-available water supply capacity of about 0.1 mgd. Future growth in this area will
require the search for fractures in the Triassic formation for additional wells with adequate
yields and acceptable water quality.
Eastern A dm County - Abbottstown, Easr Berlin, and New word area.- Abbottstown and
East Berlin Municipal Water Authorities both appear to have adequate water supply
capacity from their wells for substantial future growth. New Oxford, which obtains most of
its water from the Conewago Creek (an average of about 0.57 mgd), is currently near its
approved capacity, but has obtained a permit from DER to double withdrawals from the
creek, from .65 mgd to 1.3 mgd. The "safe yield from the creek (Le., the amount of water
that flows in the creek even during periods of drought) is 7.45 mgd, so even further
withdrawals of water could be permitted. The growing areas around Cross Keys, Dicks
Dam, and other contiguous or nearby locations in Oxford, Mt. Pleasant, Berwick, and
Hamilton Townships could be served by extensions to the New Oxford Municipal Authority
water supply lines.
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