| | 901: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | Seventy-five shallow wells were sampled for water-quality analysis in Kane County in October 2003 to provide a 'snapshot' of groundwater quality in these shallow aquifers and also compare water quality from different parts and aquifers of Kane County. The quality of shallow groundwater in Kane County is generally good, especially in the western and central thirds of the county. However, the total dissolved solids (TDS) concentrations of samples from the eastern third of the county were significantly higher than elsewhere in the county. The ions of greatest concern are chloride and sulfate. Almost two-thirds of the samples from the eastern wells sampled had TDS, chloride, and/or sulfate concentrations above their drinking water standards. Road-salt runoff, vehicular exhaust, and industrial discharges are the most likely sources of these elevated solutes. Because the movement of groundwater is slow, the widespread presence of high TDS groundwater in the eastern urban corridor of Kane County suggests a fairly long history of shallow groundwater contamination. This project provides a baseline for shallow groundwater quality in Kane County. Repeating this study at 5-year intervals, sampling as many of the same wells as possible, would help to determine water-quality changes as Kane County undergoes land-use changes. More detailed studies at more frequent intervals for particularly sensitive areas or those with rapid changes in land use also may be helpful to water resource planners. | | | | Date Created: | 7 6 2005 | | | | Agency ID: | CR-2005-07 | | | | ISL ID: | 000000000910 Original UID: 999999994456 FIRST WORD: Shallow | |
| 902: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | The Illinois State Water Survey (ISWS), under contract to the Imperial Valley Water Authority (IVWA), has operated a network of rain gauges in Mason and Tazewell Counties since August 1992. The ISWS also established a network of groundwater observation wells in the Mason-Tazewell area in 1994 that is monitored by the IVWA. The purpose of the rain gauge network and the groundwater observation well network is to collect long-term data to determine the impact of groundwater withdrawals in dry periods and during the growing season, and the rate at which the aquifer recharges. This report presents data accumulated from both networks since their inception through August 2003. Precipitation is recorded continuously at 20 rain gauges. Groundwater levels are measured the first of each month at 13 observation wells. The database from these networks consists of 11 years of precipitation data and nine years of groundwater observations. For the period September 2002-August 2003, the network received an average of 30.06 inches of precipitation, 5.84 inches lower than the network 10-year 1992-2002 average precipitation. Precipitation was below average in the fall, winter, and spring, but above average during the summer of 2003. In 2002-2003, groundwater levels in many wells tended to follow the now-familiar pattern of rising water levels in early spring and peaks in mid-summer before evapotranspiration demands cause water levels to decline. However, the extremely low precipitation that occurred from the period September 2002 through May 2003 (9.23 inches below the 11-year normal) caused a weak recovery before the irrigation season started. Several wells (MTOW-4, -10, -11, and -13) experienced essentially no water-level recovery during this reporting period. Water levels in MTOW-13, in particular, fell throughout the year. That well is located in northeastern Mason County, the area of lowest precipitation. Total irrigation for the June-September period was estimated to be 46 billion gallons (bg), the fourth highest total since monitoring began in 1995 and ranked just after the 47 bg in both 2001 and 2002. This can be attributed, in part, to the growth of irrigation systems in the Imperial Valley, which now has 1,867 systems. To improve our understanding of the relationship between groundwater, stream discharge, and irrigation, an irrigation test site was initiated in April 2003. Nine observation wells were installed in close proximity to an irrigated field that abuts Crane Creek. Transducers with data loggers were installed in two wells in June 2003 to monitor groundwater levels and in Crane Creek to monitor stream stage. Preliminary data are presented. | | | | Date Created: | 9 15 2005 | | | | Agency ID: | CR-2005-06 | | | | ISL ID: | 000000000911 Original UID: 999999994457 FIRST WORD: Operation | |
| 903: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Lists workers' compensation maximum and minimum benefit rates from 1/15/85 - 1/14/1990 in Illinois. | | | | Date Created: | 1990 | | | | Agency ID: | | | | | ISL ID: | 000000000912 Original UID: 860 FIRST WORD: Illinois | |
| 904: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Lists workers' compensation maximum and minimum benefit rates from 1/15/1980 - 1/14/1985 in Illinois. | | | | Date Created: | 1985 | | | | Agency ID: | | | | | ISL ID: | 000000000913 Original UID: 861 FIRST WORD: Illinois | |
| 905: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Lists workers' compensation maximum and minimum benefit rates from 1/15/1990 - 1/14/1995 in Illinois. | | | | Date Created: | 1995 | | | | Agency ID: | | | | | ISL ID: | 000000000914 Original UID: 862 FIRST WORD: Illinois | |
| 906: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Lists workers' compensation maximum and minimum benefit rates from 1/15/1995 through 1/14/2000 in Illinois. | | | | Date Created: | 2000 | | | | Agency ID: | | | | | ISL ID: | 000000000915 Original UID: 863 FIRST WORD: Illinois | |
| 907: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Lists workers' compensation maximum and minimum benefit rates from 1/15/2000 - 1/14/2005 in Illinois. | | | | Date Created: | 2005 | | | | Agency ID: | | | | | ISL ID: | 000000000916 Original UID: 864 FIRST WORD: Illinois | |
| 908: | | Title: | | | | | Volume/Number: | 1950 | | | | Issuing Agency: | | | | | Description: | This investigation is part of a state - wide investigation of groundwater resources being conducted by the State Water Survey Division. Records of more than 1400 wells have been tabulated. These wells penetrate one or more of three separate and distinct aquifers within the glacial drift . The three aquifers penetrated by wells in this are a have unrelated hydrostatic heads. The average daily pumpage from the middle deposits, the major producing aquifer considered in this report, was 7.917 million gallons. It was estimated that a total of 67,812 million gallons of water has been pumped from this aquifer. Water level pressure contour maps of the upper and middle waterbearing deposits show no similarity. Sufficient data are not available to permit the construction of a pressure contour map of the lower deposits. Values of the coefficients of transmissibility and storage have been determined. Values of the coefficient of transmissibility ranged from 10,000 to 400,000 and averaged about 40,000. Values of the coefficient of storage ranged from 0.00024 for short periods to 0.0065 for a 46 year period, the longest for which records are available. Using a coefficient of storage of 0.0065 it was determined that the amount of water removed from storage since pumping began was about 3,187 million gallons or about 5 percent of the total amount of groundwater withdrawn. The amount of inflow into the heavily pumped area at Champaign-Urbana is about equal to the 1948 rate of withdrawal indicating little if any recharge within the 630 contour of the cone of depression. The steep hydraulic gradient and low water levels near the area of heavy withdrawal, together with continued water level recession, suggests that the middle deposits at Champaign-Urbana have been developed to their maximum transmission rate and that some lessening of the rate of withdrawal would be necessary to maintain constant operating water levels. | | | | Date Created: | 1 9 2006 | | | | Agency ID: | RI-6 | | | | ISL ID: | 000000000917 Original UID: 999999993871 FIRST WORD: Groundwater | |
| 909: | | Title: | | | | | Volume/Number: | 1960 | | | | Issuing Agency: | | | | | Description: | Most if not all of the so called artesian aquifers in Illinois are actually leaky artesian aquifers. If the permeability of the confining bed is very low, vertical leakage may be difficult to measure within the average period (8 to 24 hours) of pumping tests. However, since the cone of depression created by pumping a well tapping a leaky artesian aquifer continues to expand until discharge is balanced by the amount of induced leakage, it does not follow that vertical leakage is of small importance over extended periods of time. As the cone of depression grows in extent and depth, the area of leakage and the vertical hydraulic gradient become large. Accordingly then, with long periods of pumping, contribution by leakage through a confining bed may be appreciable even though the vertical permeability is very low. If a source is available to replenish continuously the confining bed, the cone of depression developed by a well pumping for long extended periods will be influenced by the vertical permeability of the confining bed in addition to the hydraulic properties and geohydrologic boundaries of the main aquifer. Any long-range forecast of well or aquifer yield must include the important effects of leakage through the confining bed. The vertical permeability of a confining bed often can be determined from the results of pumping tests as described in this publication. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | RI-39 | | | | ISL ID: | 000000000918 Original UID: 999999993903 FIRST WORD: Leaky | |
| 910: | | Title: | | | | | Volume/Number: | 1994 | | | | Issuing Agency: | | | | | Description: | This report on the 1993 flood on the Mississippi River in Illinois and on the lower reaches of the Illinois River was prepared by the Illinois State Water Survey with assistance from the Illinois Department of Transportation/Division of Water Resources and the Illinois Natural History Survey. The report begins with a brief description of the physical setting of the Upper Mississippi River System, including historical facts on climate, precipitation, hydrology, and floods. The 1993 flood is discussed with regard to precipitation, soil moisture, stages, flows, levee breaches, and discharge through levee breaches. Also discussed are impacts of the flood on social, economic, hydraulic and hydrologic, and environmental aspects of the river and its residents. Impacts on water quality, the environment, and public water supplies, including the beneficial and detrimental aspects of the flood, also are included. The lessons learned from this flood focus on the performance of the levees, governmental responses, the effects of flood fighting, change in stages due to levee breaches, flood modeling, and the lack of information dissemination to the public on the technical aspects of the flood. These lessons point out information gaps and the need for research in the areas of hydraulics and hydrology, meteorology, sediment transport and sedimentation, surface and groundwater interactions, water quality, and levees. The report presents a comprehensive summary of the 1993 flood as far as climate, hydrology, and hydraulics are concerned. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | MP-151 | | | | ISL ID: | 000000000919 Original UID: 999999994109 FIRST WORD: The | |
| 911: | | Title: | | | | | Volume/Number: | 1991 | | | | Issuing Agency: | | | | | Description: | The Illinois River is at a crossroads. All the events in its history, both natural and those accomplished through human intervention, are now poised to change the river in ways that may render it unrecognizable in our own lifetimes. This publication is intended to introduce you to the Illinois River and the issues that will shortly determine its very survival. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | MP-128 | | | | ISL ID: | 000000000920 Original UID: 999999994138 FIRST WORD: The | |
| 912: | | Title: | | | | | Volume/Number: | 2002 | | | | Issuing Agency: | | | | | Description: | The Illinois River has become a focus of state and federal agencies and other organizations interested in integrated watershed management. As a result, issues related to habitat restoration, floodplain management, navigation, erosion and sedimentation, and water quality of the Illinois River are being discussed at the watershed scale. In support of this effort, the Illinois Scientific Surveys have initiated development of the Illinois Rivers Decision Support System (ILRDSS) for use in documenting project activities within the watershed and assessing and evaluating the effectiveness of potential restoration projects and management practices. The ILRDSS will integrate and expand existing databases and numerical models of segments of the Illinois River into an integrated decision support system (DSS) for the entire Illinois River watershed. New databases and models also will be created for the watershed, as well as a comprehensive ILRDSS web portal to all available data and information about the Illinois River and its basin. This report describes the current status of ILRDSS development and serves as an introduction to those unfamiliar with the Illinois Rivers Decision Support System. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | IEM-2002-02 | | | | ISL ID: | 000000000921 Original UID: 999999994335 FIRST WORD: Illinois | |
| 913: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | This magazine is a monthly publication published by the Illinois Department of Natural Resources which includes articles on outdoor activities, conservation, state park information. The magazine has articles about plants and animals, state parks and bikeways, nature preserves and outdoor activities. It has many colored photographs and detailed stories about people and nature. The magazine includes new Illinois hunting and fishing regulations, and permit deadlines. It includes a calendar of events each month and a yearly detailed calendar. | | | | Date Created: | | | | | Agency ID: | | | | | ISL ID: | 000000000922 Original UID: NA for serial records FIRST WORD: Outdoor | |
| 914: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Illinois Taxing District Map for Tax Year 2005. Geospatial data representing taxing district boundary information collected from Illinois county clerks. Map identifies the boundaries of property tax districts to be used for general illustration and research. | | | | Date Created: | 01 31 2006 | | | | Agency ID: | | | | | ISL ID: | 000000000923 Original UID: 874 FIRST WORD: McHenry | |
| 915: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Illinois Taxing District Map for Tax Year 2005. Geospatial data representing taxing district boundary information collected from Illinois county clerks. Map identifies the boundaries of property tax districts to be used for general illustration and research. | | | | Date Created: | 01 31 2006 | | | | Agency ID: | | | | | ISL ID: | 000000000924 Original UID: 875 FIRST WORD: McLean | |
| 916: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Illinois Taxing District Map for Tax Year 2005. Geospatial data representing taxing district boundary information collected from Illinois county clerks. Map identifies the boundaries of property tax districts to be used for general illustration and research. | | | | Date Created: | 01 31 2006 | | | | Agency ID: | | | | | ISL ID: | 000000000925 Original UID: 876 FIRST WORD: Menard | |
| 917: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Illinois Taxing District Map for Tax Year 2005. Geospatial data representing taxing district boundary information collected from Illinois county clerks. Map identifies the boundaries of property tax districts to be used for general illustration and research. | | | | Date Created: | 01 31 2006 | | | | Agency ID: | | | | | ISL ID: | 000000000926 Original UID: 877 FIRST WORD: Mercer | |
| 918: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | Illinois Taxing District Map for Tax Year 2005. Geospatial data representing taxing district boundary information collected from Illinois county clerks. Map identifies the boundaries of property tax districts to be used for general illustration and research. | | | | Date Created: | 01 31 2006 | | | | Agency ID: | | | | | ISL ID: | 000000000927 Original UID: 878 FIRST WORD: Monroe | |
| 919: | | Title: | | | | | Volume/Number: | 1963 | | | | Issuing Agency: | | | | | Description: | Systematic measurements of ground-water levels in Illinois were started in the early 1930s in the Chicago region. Measurements were made in 1961 in 220 observation wells in 42 counties throughout the state. In areas remote from pumping centers, no long-term continuing trends of general rise or decline of the water table are discernible. A large part of central and southern Illinois experienced a severe drought beginning early in 1952 and ending in most areas during the spring of 1955. As a result, ground-water levels declined to record-low stages especially in the southern one-half of Illinois. However, large quantities of ground water taken from storage within the ground-water reservoir were replenished during succeeding years as precipitation increased. In heavily pumped areas, changes in water levels caused by pumping are superimposed on seasonal and secular fluctuations due to natural phenomena.In some instances large developments of ground water have caused pronounced and serious declines of water levels. There are many areas of ground-water development where serious water-level declines have not occurred. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | RI-45 | | | | ISL ID: | 000000000928 Original UID: 999999993909 FIRST WORD: Ground | |
| 920: | | Title: | | | | | Volume/Number: | 1963 | | | | Issuing Agency: | | | | | Description: | In northern Illinois large quantities of ground water are withdrawn from wells in shallow dolomite aquifers of Silurian and Ordovician age. The Niagaran and Alexandrian Series of Silurian age and the Galena-Platteville Dolomite of Ordovician age yield moderate to large quantities of ground water. Dolomite beds of the Maquoketa Formation of Ordovician age yield small quantities of water to wells. Silurian rocks are usually encountered at depths of between 10 and 300 feet in northeastern Illinois and between 30 and 880 feet in northwestern Illinois. These rocks exceed 450 feet in thickness at places and are often overlain by glacial drift. The average depth of shallow doIomite weIIs is about 140 feet, and most wells of recent design are finished 12 to 16 inches in diameter. About 1000 well-production tests were made, 1921-1961, on more than 800 shallow dolomite wells. Statistical analysis of specific-capacity data provided a basis for determining 1) the role of individual shallow dolomite aquifers or formations, uncased in wells, as contributors of water; 2) whether or not significant relationships exist between the yields of wells and geohydrologic controls; and 3) the effects of acid treatment on the productivities of wells. It is concluded that the Niagaran Series, Alexandrian Series, and Galena-Platteville Dolomite all have similar moderate to high yields and inconsistency of yields in areas throughout northern Illinois where these rocks directly underlie glacial drift. These Silurian and Ordovician rocks have similar low yields and inconsistency of yields in areas where these rocks are overlain by bedrock. On the other hand, the Maquoketa Formation and rocks of Devonian age yield very little water to wells. Most water-yielding openings occur in the upper one-third of the shallow dolomite aquifers. There is a good connection between glacial drift and the upper part of the shallow dolomite aquifers. Highest yielding wells are found in bedrock upland areas, in areas where the glacial drift immediately overlying the shallow dolomite aquifers is composed of sand and gravel, and in areas where reefs and associated strata are present. Most dolomite wells treated with acid show significant improvement in yield; largest improvements are recorded for rehabilitated wells. Yields are increased because water-yielding openings are enlarged and fine drill cuttings or incrustations are removed from openings. Probable ranges in yields of shallow dolomite wells in undeveloped areas are estimated from specific-capacity frequency graphs, aquifer thickness and area1 geology maps, and waterlevel data. | | | | Date Created: | 6 17 2005 | | | | Agency ID: | RI-46 | | | | ISL ID: | 000000000929 Original UID: 999999993910 FIRST WORD: Yields | |
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