If the predicted noise levels approach or exceed FHWAâs noise abatement criteria, noise abatement measures are considered. IDOT strives to reduce or eliminate adverse environmental impacts and as appropriate to identify mitigation or remediation actions to achieve the best possible outcome during project development, design, and construction. Article 107.41 of the Standard Specifications for Road and Bridge Construction.
One example of that is the survey work performed in District 1 for the Indiana bat. Once prequalified, a firm is eligible to submit a bid on state and local advertised projects. An aquifer is an area containing saturated (with groundwater) soils and geologic materials that are sufficiently permeable to readily yield economically useful quantities of water to wells, springs, or streams under ordinary hydraulic gradients.
This manual provides a description of the community impacts that may occur as a result of a transportation project, and specifies methods, techniques and data requirements for conducting a community study. View up to date information on how Illinois is handling the Coronavirus Disease 2019 (COVID-19) from the Illinois Department of Public Health. In addition, IDOT considers effects on area sensitive migratory birds during project development and evaluates the potential for habitat fragmentation.
Under the CWA and IWPA, IDOT must demonstrate that all measures were taken to first avoid and then minimize impacts to wetlands to the fullest extent practicable.
The intent is that this rating system and guide will be revised as the state of the art evolves â utilizing the input of industry users. In the event a listed species is present or there is suitable habitat within a project area, IDOT will conduct surveys through a statewide contract with the Illinois Natural History Survey (INHS) to determine the continued presence of the species and suitable habitat in the area which aids the department in avoiding impacts, minimizing impacts, and as a last case scenario mitigating impacts. Areas featuring karst topography are especially subject to groundwater contamination because these areas do not contain the usual filtering layers provided by soil so that surface water contamination can flow directly into the groundwater. Projects are continuing. Chapters 24 to 26 of the Bureau of Design and Environment (BDE) Manual outlines various highway-related air quality issues that are documented in IDOT NEPA documents.Â.
To view requirements and process on how to become qualified please navigate to Material Approvals. Certification for airports and restricted landing areas and any alterations or extensions must be obtained through IDOT. Environmental, social, and energy conservation considerations are integral elements in transportation investments.
More information can be found under the Indiana Bat (below).
IDOTâs Community Impact Assessment Manual has been developed for use in the identification and assessment of socioeconomic impacts. This represented a 176 net-nights of effort (1 net-night = 1 net checked for one night). During the project development stage traffic noise studies are performed.
Please visit the Consultant Resources webpage (toward bottom of page) to view Environmental resources as the Environmental Survey Request (ESR) form, which initiates the Phase 1 review process. A firm must get certified as a DBE before that firm can be considered for DBE goals set within projects. Please navigate to Disadvantaged Business Enterprise to view requirements. The approach of sustainability and I-LAST is to incorporate a broader range of issues into the development and completion of state highway projects. Environmental regulations encompass air quality, traffic noise, community impacts such as relocations and access changes, natural resources including protected species and habitats, cultural resources such as pre-historic and historic sites, and land and water contamination issues. The chart below depicts the air pollutants by emission category. Abatement measures such as noise walls or berms are effective in reducing traffic noise that will result from the transportation improvement. The 1987 Illinois Groundwater Protection Act was implemented to protect groundwater resources from degradation. While landscaping can be used as an effective visual barrier, studies have shown that trees and shrubbery alone do not provide significant reduction in noise levels and are not approved as a noise abatement measure. Please review the requirements Airport & Heliport Certification. In the years since the National Environmental Policy Act was signed into law in 1970, the range of concerns about the relationship between the highway and its associated effects on the surrounding environment has expanded. IDOTâs Storm Water Management Program is governed by several activities.
Following this effort, no Indiana Bats were captured by the INHS. Public well water supplies are regulated through set back zones established by IEPA. Illinois Natural History Survey Research webpage. The assessment process is an integral part of project planning and development.
General Requirements and Covenants B. Earthwork, Landscaping, Erosion Control C. Subgrades, Subbases, and Base Courses Air pollution is derived from numerous sources. IDOT has developed additional construction-related specifications and contract special provisions dealing with the use of cleaner diesel fuel, idling reduction requirements for construction equipment, and the installation of emission control devices on contractor vehicles. While Illinois has no designated sole-source aquifer at the present time, it has many shallow (sand and gravel) and deep (bedrock) aquifers. Proceedings from these meetings are provided below: IDOT maintains approximately 60,000 bridges over streams and rivers. Visit Getting Around Illinois to view the Work Zone Map.
A sole-source aquifer is one which supplies at least 50 percent of the drinking water consumed in the overlying area with no practicable alternative drinking water source. The 100-year floodplain is defined as an area that has a 1 percent or 1 chance in 100 of experiencing a flood condition that exceeds any previous 1 year period. To help achieve transportation air quality planning goals and to attain the NAAQS, IDOT works through the inter-agency consultation process to ensure that the Long Range Plans and Transportation Improvement Programs, developed by MPOs, conform with air quality improvement plans.
IDOT is required to have an inspection and material testing program, to assure the quality of materials used in highway projects. Roads are open. Deicing materials used for snow and ice removal flow into area streams via roadside ditches and/or storm sewers. Definition of Terms 2) Appendix, Metric Information 3) Article 106.01 Source of Supply and Quality Requirements.
IDOTâs Highway Traffic Noise Assessment Manual describes techniques and procedures for analyzing and reporting traffic noise impacts. Floodplains usually occur adjacent to streams, rivers, and lakes. In order to analyze atmospheric dispersal of salt, IDOT, in conjunction with the Illinois State Tollway Authority and the Federal Highway Administration initiated studies that were performed by the Illinois Water Survey. Coordination with the U.S. Army Corp of Engineers and the Department of Natural Resources Office of Water Resources (IDNR-OWR) is required to obtain the necessary permits for work within floodplains. The link below will provide electronic copies of base-line studies, instruments and monitoring reports for IDOT bank sites and multi-use compensation sites. To fulfill specific air quality requirements under the Clean Air Act (CAA), IDOT partners and works closely with the U.S. Department of Transportation, U.S. and Illinois Environmental Protection Agency (EPA), and Metropolitan Planning Organizations (MPO), to deal with regional as well as micro-scale air quality issues. Please choose the appropriate certification process below: Certification for airports and restricted landing areas and any alterations or extensions must be obtained through IDOT. Please review the requirements Airport & Heliport Certification.
The materials used on the work shall meet all quality requirements of the contract. Groundwater studies using monitoring wells are often performed in areas that are considered sensitive because they support plant communities containing endangered or threatened species or land areas that have been designated as Natural Areas or Nature Preserves.
If awarded the contract, the firm follows department rules and regulations until fulfillment of the contractual obligation.
View up to date information on how Illinois is handling the Coronavirus Disease 2019 (COVID-19) from the Illinois Department of Public Health. All transportation projects, involving the use of state and federal funds are required to follow formal procedures designed to protect the natural and social environment, this includes wetlands, plants, animals, air and water quality, archaeological and historic sites, agriculture, and communities.
To aid in the understanding of the nature of noise in general, and traffic noise in particular, the IDOT Traffic Noise Tutorial was updated based on IDOT's new noise policy, approved in 2011.
This information is presented in three parts, or modules, along with a section on frequently asked questions and a glossary of terms and acronyms. Also included are references and examples to aid in the evaluation of traffic noise and abatement, as well as guidelines for the documentation of analyses in IDOT environmental documents.
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