tional Capital Park and Planning Commission, Bal-
timore Regional Council of Governments, Wash-
ington Suburban Sanitary Commission, Baltimore
City Department of Public Works, Harford County
Government, Queen Anne's County Department
of Planning and Zoning, Baltimore Gas and Electric
Company, U.S. Department of Agriculture, and
U.S. Geological Survey

GEOLOGIC MAPPING ADVISORY COMMITTEE
M. Gordon Wolman, Ph.D., Chairperson
(410) 554-5504

Created in 1992, the Geologic Mapping Advi-
sory Committee advises the Director of the Mary-
land Geological Survey on the development of
geologic maps of areas important to the economic,
social and scientific welfare of the State and nation.
The Committee is concerned with the State geo-
logic mapping component (called STATEMAP) of
the National Cooperative Geologic Mapping Pro-
gram established in 1992 within the U.S. Geologi-
cal Survey (P.L. 102-285, National Geologic
Mapping Act of 1992).

COMMISSION OF THE MARYLAND
GEOLOGICAL SURVEY
M. Gordon Wolman, Ph.D., Chairperson
(410) 516-7090

The Commission of the Maryland Geological Sur-
vey advises the Director on matters concerning the
Survey. The Commission's five members are appointed
by the Secretary of Natural Resources to five-year
terms (Code Natural Resources Article, sec. 2-204).

HYDROGEOLOGY & HYDROLOGY
PROGRAM

Harry J. Hansen, Ph.D., Chief
(410) 554-5554

The Hydrogeology and Hydrology Program
was formed in 1972. In cooperation with the U.S.
Geological Survey, the Program maintains a state-
wide water data network and investigates the hy-
drologic and geologic characteristics of Maryland's
water resources.
The surface water data network provides infor-
mation on minimum, maximum and average
streamflows for the planning of water supply and
sewage facilities, water power projects, dams and
bridges. The ground water network measures water
levels in aquifers and selected springs and relates
changes in ground water levels to withdrawals and
precipitation. The ground water network also
monitors the hydrologic effects of long-term
changes in pumpage, land use patterns, and rainfall.
Special resource assessment studies undertaken
with local and county governments include the
extent of saltwater intrusion, aquifer and stream-

flow characteristics, water quality and rates of re-
plenishment, and water well sampling for basic
chemistry, nutrients, radon and either industrial
organic constituents, or agricultural herbicide or
pesticide residues.

ENVIRONMENTAL GEOLOGY & MINERAL
RESOURCES PROGRAM
James P. Reger, Ph.D., Chief
(410) 554-5523

The Environmental Geology and Mineral Re-
sources Program makes geologic, environmental and
topographic maps and investigates mineral and energy
resources. Program studies provide an earth science
framework for managing Maryland's mineral, energy
and land resources. The Program was created in 1972
from the former Geologic Investigations Program and
the Topographic Maps Program.
Topographic maps are used by the public for
activities such as hiking and camping and by State
and local governments for a myriad of technical and
planning applications. Geologic maps provide data
about the kinds of rocks and the location of minerals
(predominantly sand, gravel, stone, and coal) and
provide background for the intelligent planning
and use of Maryland's geologic natural resources.
The Program provides technical advice and as-
sistance for the Geologic Exhibits and Visitors Cen-
ter at Sideling Hill in western Maryland. Through
the Survey's library and the Earth Science Informa-
tion Center, aerial photos and large-scale maps are
available to the public and private industry.

COASTAL & ESTUARINE GEOLOGY
PROGRAM
Randall T. Kerhin, Chief
(410) 554-5544

Created in 1971 from the Shore Erosion Inves-
tigation Program, the Coastal and Estuarine Geol-
ogy Program investigates the geologic framework
and resources of the State's coastal environments
extending from the barrier island of the Atlantic
Ocean to the wetlands and shorelines of
Chesapeake Bay. Orthophoto quadrangle maps
from aerial photography, combined with historical
shoreline erosion maps, provide the basis to evalu-
ate shoreline changes in the Bay region.
Using the Survey's research vessel, the geo-
chemical components and physical features of the
sediments are being monitored around the Hart-
Miller Island Containment Facility.
In 1975, the Chesapeake Bay Earth Science
Study was added to the Program. This work deter-
mines the distribution of sands, silts, and clays;
identifies the patterns of erosion and deposition of
these sediments; and analyzes the geochemistry of
the pore waters in these sediments.