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781:		Title:	The Illinois River Decision Support System (ILRDSS)
		Volume/Number:	1999
		Issuing Agency:
		Description:	The Illinois River has become the focus of state and federal agencies interested in integrated management of watersheds. Issues related to habitat restoration, floodplain management, navigation, erosion and sedimentation, water quality, and point and nonpoint source pollution are all being discussed at the watershed level. One major result of these discussions is the Integrated Management Plan (IMP) for the Illinois River watershed. The plan includes 34 recommendations that are in the process of being implemented by different agencies at different paces and levels of intensity. The Illinois State Water Survey (ISWS) has played a major role in the development of the IMP and is actively participating in implementation of the plan. The implementation phase of the IMP involves questions and answers on a watershed-wide basis and is not limited to local or regional issues. Currently, there is no integrated tool to evaluate and predict hydrological and water quality responses to changes in the physical environment of the Illinois River basin. To fill this gap, the ISWS has initiated the development of the Illinois River Decision Support System (ILRDSS) for use in assessing and evaluating the effectiveness of different projects undertaken under the IMP as well as the consequences of other natural or human-induced changes in the watershed. The ILRDSS will integrate and expand existing databases and models for segments of the Illinois River and portions of the watershed into an integrated decision support system for the entire watershed. New databases and models also will be created for the entire watershed and to address important water quantity and quality issues. Links and interfaces will be developed that interconnect various databases and model components. Once developed and tested, the ILRDSS will enable decision-makers to answer "what-if" questions during the implementation phase of the IMP or other programs within the Illinois River system. The scenarios that can be evaluated using the ILRDSS may include climate shifts and fluctuations, land-use changes, and changes in regulations and water management practices. Using various combinations of these variables as input, the ILRDSS will generate output on potential hydrological and water quality responses of the Illinois River system for different temporal and spatial scales.
		Date Created:	3 10 2006
		Agency ID:	CR-648
		ISL ID:	000000000800 Original UID: 999999994054 FIRST WORD: The

782:		Title:	Fox River streamflow assessment model: 1999 update to the hydrologic analysis
		Volume/Number:	1999
		Issuing Agency:
		Description:	The Illinois Streamflow Assessment Model (ILSAM) was developed to provideneeded streamflow information to watershed managers and planners. This specialized software program was developed for use on a personal computer to provide estimates of the long-term expected magnitude of streamflow at various frequencies for any stream location along a major stream in a watershed.The purpose of this study was to update ILSAM for the Fox River Basin, a modeloriginally developed in 1988. Over time, climate variability and changes in humanfactors, such as land and water use, and water resource projects, can greatly affect the quantity and distribution (both in space and time) of surface waters in a river basin. For this reason, the data sets used by ILSAM were designed to be updated periodically, perhaps every 5 to 15 years. The frequency of and need for updates are governed by the rate at which streamflow conditions in the watershed change over time. The model update for the Fox River Basin addresses four areas that influence the flow frequencies and their estimation:- Increases in population, overall water use, and the resulting effluent discharges.- A new public water supply withdrawal from the Fox River and increases inmagnitude of existing withdrawals.- General increases in streamflow magnitude caused by climatic variability and the overall increase in average precipitation.- Adoption of improved regional equations from which to estimate flow at ungaged s i t e s .
		Date Created:	9 24 2004
		Agency ID:	CR-649
		ISL ID:	000000000801 Original UID: 999999994055 FIRST WORD: Fox

783:		Title:	Sidestream elevated pool aeration (SEPA) stations: effects on in-stream dissolved oxygen
		Volume/Number:	2000
		Issuing Agency:
		Description:	As a result of increased pollutant loading and low in-stream velocities, dissolved oxygen (DO) levels in the Chicago waterways historically have been low. In 1984, the Metropolitan Water Reclamation District of Greater Chicago (MWRDGC) issued a feasibility report on a new concept of artificial aeration referred to as sidestream elevated pool aeration (SEPA). The SEPA station concept involves pumping a portion of water from a stream into an elevated pool. The water is then aerated by flowing over a series of cascades or waterfalls, returning to the stream. The MWRDGC proceeded with design criteria for SEPA stations as a result of experimental work performed by the Illinois State Water Survey (ISWS). Five SEPA stations were constructed and placed in operation along the Calumet River, Little Calumet River, and the Cal-Sag Channel waterway. In 1995 the ISWS returned to conduct research to evaluate the reaeration efficiencies and their effects on in-stream DO. Continuous monitoring of DO, temperature, pH, and conductivity was performed at 14 locations along the Calumet and Little Calumet Rivers, Cal-Sag Channel, and Chicago Sanitary and Ship Canal to evaluate the effectiveness of the SEPA stations on maintaining in-stream DO concentrations. Also, supplemental cross-sectional measurements were made at the 14 locations and at an additional seven locations. Comparisons of mass balance, completely mixed, in-stream mean DO concentrations at the SEPA station outfalls and those measured at cross-sectional stations immediately downstream of each SEPA station were made. Results showed that each SEPA station has an immediate positive impact on in-stream DO concentrations. At SEPA stations 1 and 2, where the impacts are small, the positive effects can best be demonstrated using completely mixed values. Two important conclusions can be made. One is that the SEPA stations, particularly stations 3, 4, and 5, are fulfilling the intended function of maintaining stream DO standards in the Calumet and Little Calumet Rivers and the Cal-Sag Channel. The second is that DO concentrations less than the DO standard are still observed in the Chicago Sanitary and Ship Canal in the reach beginning above its juncture with the Cal-Sag Channel to the Lockport Lock and Dam. Over the entire study period, DO concentrations were maintained above the standard 98.6 percent of the time from the SEPA station 3 outfall to the intake of SEPA station 4 and 97.5 percent of the time from the outfall of SEPA station 4 to the intake of EPA station 5. Significant improvements in DO concentrations were also achieved for at least 4 miles downstream of SEPA station 5 in the Chicago Sanitary and Ship Canal.
		Date Created:	9 24 2004
		Agency ID:	CR-2000-02
		ISL ID:	000000000802 Original UID: 999999994078 FIRST WORD: Sidestream

784:		Title:	Hydrologic modeling of the Court Creek watershed
		Volume/Number:	2000
		Issuing Agency:
		Description:	Flooding, upland soil and streambank erosion, sedimentation, and contamination of drinking water from agricultural chemicals (nutrients and pesticides/herbicides) are critical environmental problems in Illinois. Upland soil erosion causes loss of fertile soil, streambank erosion causes loss of valuable riparian lands, and both contribute large quantities of sediment (soil and rock particles) in the water flowing through streams and rivers, which causes turbidity in sensitive biological resource areas and fills water supply and recreational lakes and reservoirs. Most of these physical damages occur during severe storm and flood events. Eroded soil and sediment also carry chemicals that pollute water bodies and stream/reservoir beds. Court Creek and its 97-square-mile watershed in Knox County, Illinois, experience problems with flooding and excessive streambank erosion. Several fish kills reported in the streams of this watershed were due to agricultural pollution. Because of these problems, the Court Creek watershed was selected as one of the pilot watersheds in the Illinois multi-agency Pilot Watershed Program (PWP). The watershed is located in environmentally sensitive areas of the Illinois River basin; therefore, it is also part of the Illinois Conservation Reserve Enhancement Program (CREP). Understanding and addressing the complex watershed processes of hydrology, soil erosion, transport of sediment and contaminants, and associated problems have been a century old challenge for scientists and engineers. Mathematical computer models simulating these processes are becoming inexpensive tools to analyze these complex processes, understand the problems, and find solutions through land-use changes and best management practices (BMPs). Effects of land-use changes and BMPs are analyzed by incorporating these into the model inputs. The models help in evaluating and selecting from alternative land-use and BMP scenarios that may help reduce damaging effects of flooding, soil and streambank erosion, sedimentation (sediment deposition), and contamination to the drinking water supplies and other valuable water resources. A computer model of the Court Creek watershed is under development at the Illinois State Water Survey (ISWS) using the Dynamic Watershed Simulation Model (DWSM) to help achieve the restoration goals set in the Illinois PWP and CREP by directing restoration programs in the selection and placement of BMPs. The current study is part of this effort. The DWSM uses physically based governing equations to simulate propagation of flood waves, entrainment and transport of sediment, and commonly used agricultural chemicals for agricultural and rural watersheds. The model has three major components: (1) hydrology, (2) soil erosion and sediment transport, and (3) nutrient and pesticide transport. The hydrologic model of the Court Creek watershed was developed using the hydrologic component of the DWSM, which is the basic (foundation) component simulating rainfall-runoff on overland areas, and propagation of flood waves through an overland-stream-reservoir network of the watershed. A new routine was introduced into the model to allow simulation of spatially varying rainfall events associated mainly with moving storms and localized thunderstorms. The model was calibrated and verified using three rainfall-runoff events monitored by the ISWS. The calibration and verification runs demonstrated that the model was representative of the Court Creek watershed by simulating major hydrologic processes and generating hydrographs with characteristics similar to the observed hydrographs at the monitoring stations. Therefore, model performance was promising considering watershed size, complexities of the processes being simulated, limitations of available data for model inputs, and model limitations. The model provides an inexpensive tool for preliminary investigations of the watershed for illustrating the major hydrologic processes and their dynamic interactions within the watershed, and for solving some of the associated problems using alternative land use and BMPs, evaluated through incorporating these into the model inputs. The model was used to compare flow predictions based on spatially distributed and average rainfall inputs and no difference was found because of a fairly uniform rainfall pattern for the simulated storm. However, the routine will be useful for simulating moving storms and localized thunderstorms. A test to examine effects of different watershed subdivisions with overland and channel segments found no difference in model predictions. This was because of the dynamic routing schemes in the model where dynamic behaviors were preserved irrespective of the sizes and lengths of the divided segments. Although finer subdivision does not add accuracy to the outflows, it allows investigations of spatially distributed runoff characteristics and distinguishes these among smaller areas, which helps in prioritizing areas for proper attention and restoration. The calibrated and verified model was used to simulate four synthetic (design) storms to analyze and understand the major dynamic processes in the watershed. Detailed summaries of results from these model runs are presented. These summary results were used to rank overland segments based on unit-width peak flows, which indicated potential flow strengths that may damage the landscape, and were based on runoff volumes that indicate potential flood-causing runoff amounts. Stream channel and reservoir segments also were ranked based on peak flows and indicate potential for damages to the streams. Maps were generated showing these runoff potentials of overland areas. These results may be useful in identifying and selecting critical overland areas and stream channels for implementation of necessary BMPs to control damaging effects of runoff water. The model also was used to evaluate and quantify effects of the two major lakes in the watershed in reducing downstream flood flows and demonstrating model ability to evaluate detention basins. The model was run for one of the design storms with and without the lakes. The results showed significant reduction of peak flows and delaying of their occurrences immediately downstream. These effects become less pronounced further downstream. This report presents and discusses results from the above applications of the DWSM hydrology to the Court Creek watershed along with descriptions of the watershed, formulations of the hydrology component of the DWSM, limitations of the model and available data affecting predictions, and recommendations for future work. Efforts are currently under way at the ISWS to add subsurface and tile flow routines to the DWSM that would improve model predictions and their correspondence with observed data. It is recommended that stream cross-sectional measurements be made at representative sections of all major streams in the Court Creek watershed and that stream flow monitoring be continued or established at least at outlets of major tributaries and upper and lower Court Creek. A minimum of four equally spaced raingage stations are recommended for recording continuous rainfall.
		Date Created:	9 24 2004
		Agency ID:	CR-2000-04
		ISL ID:	000000000803 Original UID: 999999994080 FIRST WORD: Hydrologic

785:		Title:	Atmospheric dispersion study of deicing salt applied to roads : first progress report
		Volume/Number:	2000
		Issuing Agency:
		Description:	This report describes the status of an initial effort to understand and describe the atmospheric transport of road salt in the form of sodium chloride (NaCl) applied to highways as a deicing material. The study area is a proposed 20.1 kilometer or km (12.5 mile) tollway that is planned to extend Interstate 355 (I-355) located west of Chicago, Illinois, to connect Interstate 55 (I-55) and Interstate 80 (I-80) southwest of Chicago near Lemont, Illinois. Prior to construction, which has not yet begun, the focus of the effort has been to establish background levels of the road salt aerosol, to construct permanent sites along the proposed route corridor from which to better monitor and measure road salt aerosol properties, and to identify important parameters for use in constructing a computer model to describe the salt emission and deposition. The present status of the proposed project is that construction plans have been delayed at least until approval of a supplement to the environmental impact statement. Results from chemical analysis of aerosol and snow samples are reported that show progress toward characterizing the road salt aerosol with respect to its size, mechanisms of emission, range of atmospheric transport, and mechanisms of deposition. Analysis of the preliminary data suggest: 1. A large portion of the salt aerosol that becomes aerosolized is emitted after the road surface has been cleared of snow and ice. 2. Approximately 90 percent of the airborne road salt is contained in aerosol particles of diameter larger than 2.5 micrometers or 10^-4 inches. 3. The salt deposition pattern near a treated roadway as determined by snow samples decreases consistently with distance from the road. Average deposition values for a single snow event are found here to yield an aerial deposition of 0.06 grams per square meter (0.6 pounds per acre) at 500 meters (1,640 feet) from the road. The corresponding value for the total deposition per length of roadway is 85 grams per meter or g/m (300 pounds per mile or lb/mi). Five permanent sampling sites are almost completed and will provide a flexible monitoring capability to better quantify the road salt emission, transport, and deposition. Road salt emissions in aerosol samples collected at the locations of two of the permanent sites are reported here. The sites are located 0.6 km (0.4 mi) and 1.0 km (0.6 mi) southeast of I-55 in the prevailing downwind direction, but could also be affected by salt emission from a secondary road in the vicinity. A comparison of the aerosol measurements at the two sampling sites during periods when salt was applied shows that the site nearer to the sources consistently had higher levels of NaCl. Most of the NaCl was found in particles with diameter larger than 10 micrometers (4x10^-4 inches).
		Date Created:	9 24 2004
		Agency ID:	CR-2000-05
		ISL ID:	000000000804 Original UID: 999999994094 FIRST WORD: Atmospheric

786:		Title:	Continued operation of a raingage network for collection, reduction, and analysis of precipitation data for Lake Michigan diversion accounting : Water Year 1999.
		Volume/Number:	2000
		Issuing Agency:
		Description:	A dense raingage network has operated in Cook County since the fall of 1989, to provide accurate precipitation for use in simulating runoff for purposes of Lake Michigan diversion accounting. This report describes the network design, the operations and maintenance procedures, the data reduction methodology, and an analysis of precipitation occurring during Water Year 1999 (October 1998 through September 1999). The data analyses include 1) monthly and Water Year 1999 amounts at all sites, 2) Water Year 1999 amounts in comparison to patterns from network Water Years 1990-1998, and 3) the ten-year network precipitation average for Water Years 1990-1999. Also included are: raingage site description, instructions for raingage technicians, documentation of raingage maintenance, and documentation of high storm totals.
		Date Created:	9 24 2004
		Agency ID:	CR-2000-07
		ISL ID:	000000000805 Original UID: 999999994112 FIRST WORD: Continued

787:		Title:	Sedimentation survey of the Morton Arboretum Lakes, DuPage County, Illinois
		Volume/Number:	1999
		Issuing Agency:
		Description:	The Illinois State Water Survey conducted a sedimentation and hydrographic survey of three small lakes at The Morton Arboretum in Lisle, Illinois, during the summer of 1998. The survey was undertaken in support of an Illinois Clean Lakes Program diagnostic/feasibility study of the lakes. The lakes are owned and maintained by The Morton Arboretum and serve primarily as landscape accents on the grounds. The lakes surveyed were: Meadow Lake, constructed in 1960; Sterling Pond, constructed in 1963; and Lake Marmo, constructed in 1922. Lake sedimentation occurs when sediment-laden water enters the reduced flow velocity regime of a lake. As the water velocity is reduced, suspended sediment is deposited in patterns related to the size and fall velocity of each particle. The soil particles are partially sorted by size along the longitudinal axis of the lake during this process. Larger, heavier sand and coarse silt particles are deposited in the upper end of the lake; finer silts and clay particles tend to be carried further into the lake. A sedimentation survey is a measure of the rate of volume and/or depth loss of the reservoir. The sedimentation survey provides detailed information on distribution patterns of sediment within the lake as well as temporal changes in overall sedimentation rates. Sedimentation has reduced the capacity of Meadow Lake by 10 percent, Sterling Pond by 51 percent, and Lake Marmo by 29 percent. The sediment accumulation rates in the lakes averaged 0.10 acre-feet per year for Meadow Lake, 0.29 acre-feet per year for Sterling Pond, and 0.10 acre-feet per year for Lake Marmo.
		Date Created:	3 21 2006
		Agency ID:	CR-638
		ISL ID:	000000000806 Original UID: 999999994113 FIRST WORD: Sedimentation

788:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Joint Petition for Approval of Paging Interconnection Agreement dated July 10, 2006, pursuant to 47 U.S.C. 252.
		Date Created:	09 26 2006
		Agency ID:	06-0479
		ISL ID:	000000000807 Original UID: 836 FIRST WORD: Order

789:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Complaint as to improper installation of electric cable that caused a break in sewer line in Homer Glen, Illinois.
		Date Created:	09 26 2006
		Agency ID:	06-0475
		ISL ID:	000000000808 Original UID: 834 FIRST WORD: Order

790:		Title:	Notice of Commission Action
		Volume/Number:
		Issuing Agency:
		Description:	Citation for failure to maintain corporate status.
		Date Created:	09 27 2006
		Agency ID:	06-0484
		ISL ID:	000000000809 Original UID: 813 FIRST WORD: Notice

791:		Title:	Commission Action
		Volume/Number:
		Issuing Agency:
		Description:	Complaint as to billing/charges in Chicago, Illinois.
		Date Created:	09 27 2006
		Agency ID:	06-0168
		ISL ID:	000000000810 Original UID: 810 FIRST WORD: Commission

792:		Title:	Clean Air Clips
		Volume/Number:	2004 Winter
		Issuing Agency:
		Description:	Feature articles cover: US EPA updates; Illinois udpates; Chicago's Center for Green Technology; Illinois Small Business Development Centers; and ideas for supplemental environmental projects
		Date Created:	02 20 2004
		Agency ID:
		ISL ID:	000000000811 Original UID: 807 FIRST WORD: Clean

793:		Title:	Waiver of School Code Mandates - Fall 2006 Summary Report
		Volume/Number:	vol. 23 2006 Fall
		Issuing Agency:
		Description:	As required by Section 2-3.25g of the School Code (105 ILCS 5/2-3.25g), the following report provides summaries of requests for waivers of School Code mandates being transmitted to the Illinois General Assembly for its consideration. Also included are summaries of requests for waivers and modifications acted on by the State Superintendent of Education in accordance with Section 1A-4 of the School Code (105 ILCS 5/1A-4) and of applications that have been returned to school districts or other eligible applicants.
		Date Created:	09 29 2006
		Agency ID:
		ISL ID:	000000000812 Original UID: 808 FIRST WORD: Waiver

794:		Title:	Notice of Commission Action
		Volume/Number:
		Issuing Agency:
		Description:	Reconciliation of revenues collected under gas adjustment charges with actual costs prudently incurred
		Date Created:	09 27 2006
		Agency ID:	03-0699
		ISL ID:	000000000813 Original UID: 815 FIRST WORD: Notice

795:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Reconciliation of revenues collected under gas adjustment charges with actual costs prudently incurred.
		Date Created:	09 26 2006
		Agency ID:	03-0699
		ISL ID:	000000000814 Original UID: 817 FIRST WORD: Order

796:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Complaint as to trespassing and destruction of private property in Champaign County, Illinois.
		Date Created:	09 26 2006
		Agency ID:	05-0667
		ISL ID:	000000000815 Original UID: 819 FIRST WORD: Order

797:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Complaint as to inaccurate billing in Chicago, Illinois.
		Date Created:	09 26 2006
		Agency ID:	05-0684
		ISL ID:	000000000816 Original UID: 820 FIRST WORD: Order

798:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Complaint as to service in Chicago, Illinois
		Date Created:	09 26 2006
		Agency ID:	05-0729
		ISL ID:	000000000817 Original UID: 821 FIRST WORD: Order

799:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Complaint as to improper accounting of services and request for an audit and investigation in Chicago, Illinois.
		Date Created:	09 26 2006
		Agency ID:	05-0794
		ISL ID:	000000000818 Original UID: 822 FIRST WORD: Order

800:		Title:	Order
		Volume/Number:
		Issuing Agency:
		Description:	Application for Designation as an Eligible Telecommunications Carrier for Purpose of Receiving Federal Universal Service Support pursuant to Section 214(e)(2) of the Telecommunications Act of 1996.
		Date Created:	09 26 2006
		Agency ID:	06-0038
		ISL ID:	000000000819 Original UID: 823 FIRST WORD: Order

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