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| Surface Water & Floodplain Information Services Home |
The Surface Water & Floodplain Information
program at the Illinois State Water Survey offers a wide range
of information services related to the management and study of
the state's surface water resources. Public service activities
include dissemination of general and technical information, and
data collection.
Note: Charges for some data retrieval and analytical services do apply. Please see our Policy Statement and Itemization of Charges for additional details.
| General Surface Water Information and Technical Services |
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Requests for information regarding surface water
are directed to the information services staff. Professional
and technical staff are available to answer questions from the
general public, engineers, realtors, developers, and other government
agencies; to provide information and data; or to perform engineering
analyses. Staff use the Water Survey's collection of surface
water data, reports, and maps to answer questions regarding Illinois
water resources. Program staff may make referrals to other Water
Survey offices or agencies as appropriate.
| Data Collection and Reporting |
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Surface water conditions in Illinois are summarized by Surface Water & Floodplain Information
in the monthly
Illinois Water and Climate Summary newsletter available
from the State Water Survey. Data collection activities include monitoring daily stage data
from telemetered river and stream gaging stations. Month-end water surface elevations for more than 40 reservoirs
are obtained through a network of cooperating reservoir operators in Illinois.
| Wetlands Information |
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A complete set of National Wetlands Inventory (NWI) maps
for Illinois are available for public review. NWI maps
are annotated 7.5-minute USGS quadrangles (1:24,000) compiled by the U.S. Fish and Wildlife Service. When provided with a property description or location map of a specific location, staff will send a photocopy of the relevant portion of the NWI map, with legend.
| Floodplain Information |
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The Floodplain Information Repository, established
in 1978, maintains a complete library of Federal Emergency Management
Agency (FEMA) documents: Flood Insurance Studies, Flood Insurance
Rate Maps, Floodway Boundary and Floodway Maps, Flood Hazard Boundary
Maps, and engineering data and supportive studies related to flooding.
By providing information and technical assistance to individuals,
professionals, and communities, the floodplain information service
facilitates compliance with the provisions of the National Flood
Insurance Program, thereby encouraging responsible floodplain
management. Floodplain information services available include:
The Repository's knowledgeable staff provide accurate, up-to-date information about floodplain management and regulations in Illinois and the National Flood Insurance Program. Staff participate in continuing education programs and maintain regular contact with agencies and organizations involved in floodplain management and regulation.
Note: Charges for some services do apply.
| Databases |
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Flood Discharge Database. The State Water Survey maintains a database of streamflow flood discharges that includes:
Floodplain Model Inventory. The State Water Survey maintains a collection of floodplain hydraulic models as part of its Floodplain Information public service program. An inventory list of the models in the collection is posted online for technical users, who may order copies. The primary source of the model data at ISWS is the Federal Emergency Management Agency (FEMA) archives for Flood Insurance Studies (FISs); however, please note that this database is not a list of the most current regulatory models nor all FIS models that exist.
This database may be searched online.
| Other materials distributed |
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| Floodplain Information Staff |
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State of Illinois | | |
University of Illinois | | |
Department of Natural Resources |