Name: CIRA Noise Contours

Display Field: Noise_DB

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The data was derived from the 'Federal Aviation Regulations, Part 150 Noise Exposure, Final Report Exhibit III-1 "Future Recommended Noise Exposure Contours"' study commissioned in 1988. The Study was initiated in 1988. FAR Part 150 requires the development of 65,70, and 75 Ldn noise contours. The Bloomington-Normal Part 150 Study Advisory Committee requested an additional contour at the 60 Ldn level. The field data collection portion of the Study was conducted between December 1,1988, and December 10,1988. The largest (noisiest) aircraft used in this Study was a Boeing 737-200 such as AirTran used when they first began providing service to the Airport. Commercial (scheduled air carrier) traffic produces the most noise and thus essentially controls the airport noise environment. Atmospheric conditions impact noise levels. Wind direction, wind speed, temperature, barometric pressure, and ground cover (snow) all affect noise levels at the same position from the runway. Wind direction will also impact the flight patterns and the active runway. Study projections for 2003 suggested 3,600 scheduled air carrier operations per year, or 10 per day. The Study projected only 1,297 of those operations per year, or four per day would be jets. The remainder would be turboprop. The Study did not expect development to the east of the Airport due to lack of sewer service. Federal Aviation Regulations Part 150 (FAR) does not recognize Ldn levels below 65 as having a signiJicant impact upon activities such as sleep and conversation. The only mention of the 60 Ldn noise contour in the BMI Study was that it was included at the request of the Bloomington-Normal Part 150 Study Advisory Committee. The Study mentioned that the noise level at Illinois Route 9 produces a noise contour of 65 Ldn which extends 70 to 120 feet either side of the roadway. The new north-south runway (2-20) was expected to be in operation at the beginning of 1993 according to the Study. In fact, the new runway was dedicated May 3 1, 1996, three and one half years later. The Study assumed that runway 1 1-29 (east-west) would be used 60% of the time until the new terminal was in operation. My observation is that runway 11-29 is still utilized more than half of the time over a time span of a year. The cost of the BMI Part 150 Study was $357,500. Other Illinois airports, including O'Hare and Midway had studies done within a couple of years of the BMI Study. None in the state are more recent than 1995 (Rockford).

Service Item Id: b47f91806abf464da69785c2d0679142

Copyright Text:

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 500000

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: true

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 809808.488142997
YMin: 1372495.718949236
XMax: 832926.9274703301
YMax: 1400511.9624573216
Spatial Reference: 3443  (3443)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: Noise_DB
Min. Value: 60.0
ClassBreakInfos:
• Class Maximum Value: 60
  Label: 60
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 224, 0, 255]
  Outline:
  N/A
• Class Maximum Value: 65
  Label: 61 - 65
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 163, 0, 255]
  Outline:
  N/A
• Class Maximum Value: 70
  Label: 66 - 70
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 82, 0, 255]
  Outline:
  N/A
• Class Maximum Value: 75
  Label: 71 - 75
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 0, 0, 255]
  Outline:
  N/A
Transparency: 30
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Noise_DB ( type: esriFieldTypeSmallInteger, alias: Noise_DB )
• SHAPE.STArea() ( type: esriFieldTypeDouble, alias: SHAPE.STArea() )
• SHAPE.STLength() ( type: esriFieldTypeDouble, alias: SHAPE.STLength() )
• GlobalID ( type: esriFieldTypeGlobalID, alias: GlobalID, length: 38 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata