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Regional Roads
 

Noise Attenuation Walls

Corporate Policy Manual - Noise Attenuation Barriers

Policy No: W30-04
Effective Date: 1996-06-13

General | Guidelines for Installation |
Local Improvement Procedures | Technical Committee

General

[ 1 ]

  1. Noise walls abutting railways and freeways under Ministry of Transportation (MTO) jurisdiction shall be constructed using only precast concrete or brick, concrete block or approved composite materials.
  2. Local improvements or retrofit noise walls abutting arterial and collector roads shall be constructed of either masonry, wood or approved composite materials with due consideration to streetscape, and future maintenance requirements at the discretion of the municipality.
  3. Noise walls built on private property abutting arterial and collector roads as a condition of development shall be constructed of either wood or approved composite materials.
  4. Only existing residential sites with reversed frontage and experiencing a daytime noise level equivalent (leq. daytime from 7:00 a.m. to 11:00 p.m.) or 60dBA or higher shall be considered for retrofit noise attenuation barriers.
  5. Retrofit noise walls shall be constructed with the centreline a minimum of 300mm on the public side of the streetline and only where rear yards or side yards abut a municipal road.
  6. Noise walls constructed as a condition of development shall be constructed with the centreline a minimum of 300mm on the private side of the streetline and become the maintenance responsibility of the homeowner through appropriate clauses registered on the title of the lot.
  7. A petition must be signed by owners representing a minimum of 2/3 of the properties in the benefitting area representing a minimum of 50% of the assessed value in order to be considered for a retrofit noise wall under the Local Improvement Act.
  8. The resident's special assessment for local improvement noise walls shall be based on 50% of actual final project costs with the remaining 50% to be paid by the municipality.

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Guidelines for Installation

[ 2 ]

The following guidelines are to initiate special assessment rolls for charges to be levied as a result of noise barrier construction under the Local Improvement Act. This policy is intended to supplement, and not replace, the Noise Barrier Policy, as adopted by Council in April, 1983 under Resolution 83-173-5.

  1. In general, projects will be initiated by rate-payers submitting petitions to Regional staff. In cases where the work is considered to be essential, Council may be approached to initiate same. Projects may also be advanced for Council initiative in cases where works should be coordinated with road projects.
  2. The Region will participate only in noise barriers designed in accordance with current technology to give a minimum anticipated noise attenuation of 5 dBA.
  3. Wall height generally will be determined as per the sketch approved by Regional Council.
  4. In order to achieve the required minimum attenuation, the barrier wall should meet or intercept the line of sight between the assumed locations of noise source and receiver.
  5. Also, the Region will participate only if the road in question is at least four (4) lanes wide and the residential reverse frontage is continuous between intersecting streets. If, as can be the case, the corner lot has direct frontage on the Region road the wall may be terminated with a return, if feasible, along the side lot line prior to the frontage of the corner lot.
  6. Mid-block pedestrian right-of-ways may be accommodated by staggering the noise barrier as shown in the sketch approved by Regional Council.
  7. The approval of the local Municipality, as to the height and type of wall proposed, will be mandatory, prior to construction, bearing in mind the general aesthetics and the probable contravention of local by-laws, regarding the permissible height of fence.
  8. Assessments will be prepared on Special Assessment Rolls on a form to be approved by the Commissioner of Public Works.
  9. The total chargeable cost will be the construction cost, i.e. final contract cost including pre-engineering, design, supervision, administration but excluding future maintenance for the total length of the wall including end returns.
  10. The portion of the total chargeable cost to be paid by each owner will be based on a modified frontage measurement, (to the nearest one hundredth of a metre) which will be the property width at mid lot in order to compensate for inequities arising from irregularly shaped lots.
  11. The homeowner will be assessed 50% of the cost of the barrier under the Local Improvement Act with the remaining 50% being paid by the Municipality.

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Revised: Thursday July 26 2007

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