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Table 2 FHWA Noise Abatement Criteria Hourl A-Wei hted Sound Level in Decibels dBA Activity L�o �h) Description of Activity Category Cate or Lands on which serenity and quiet are of extraordinary A 60 dBA significance and serve an important public need and where the (Exterior) preservation of those qualities is essential if the area is to continue to serve its intended u ose. 70 dBA picnic areas, recreation areas, playgrounds, active sports areas, B (Exterior) p�ks, residences, motels, hotels, schools, churches, libraries, and hos itals. C 75 dBA Developed lands, properties, or activities not included in (Exterior) Cate ories A or B above. D No Limit Undevelo ed Lands E 55 dBA Residences, motels, hotels, public meeting rooms, schools, (Interior) churches, libraries, hos itals, and auditoriums. 3.0 Evaluation and Process This environmental noise analysis was performed according to Federal Highway Administration (FHWA), Minnesota Department of Transportation (Mn/DOT), and Minnesota Pollution Control Agency (MPCA) guidelines with regards to noise in and around proposed neighborhoods affected by the proposed road improvements. 3.1 Noise Model Testing Results A detailed noise analysis has been conducted, and a proposed noise mitigation plan prepared. Many residences are located adjacent to the project area, and receptor locations are chosen that are representative of the various groupings of residences. 3.1.1 Methodology E�sting (2009) and future (2033) noise levels were modeled using the Federal Highway Administration (FHWA) noise prediction model STAMINA 2.0, as modified for use by Mn/DOT (MINNOISE). Noise projections were based on adjusted 2005 traffic counts, 2033 forecasted peak- hour traffic volumes, time of day, vehicle speeds, mix of vehicles, roadway grades, and the distance from the roadway center-of-lanes to the receptor (horizontal and vertical). 3.1.2 Noise Analysis Results The MINNOISE/STAMINA 2.0 noise model applies five scenarios for comparison of the noise levels. The scenarios are: 1) E�sting conditions (2009); 2) No Build Alternative (2033); 3) Build Alternative (2033) with no new noise barriers along the corridor; 4) Build Alternative (2033) with new 10 foot high noise barriers; and 5) Build Alternative (2033) with new 20 foot high noise barriers. The noise analysis for the daytime L10 noise levels is referred to in this discussion. For purposes of addressing the Minnesota nighttime and L50 standards, analysis results are also included in Tables 4 and 5 for the daytime L50, nighttime L10, and nighttime L50 noise levels. Noise modeling was conducted at 44 receptor sites. Of these 44 receptors, three are considered to be within a commerciaUindustrial area. Therefore, 41 receptors of the 44 represent several residences each, with similar noise characteristics at the residences. See Tables 4 and 5 for the results of the Noise Analysis RAMSP 105803 TH 36 and Rice Street Interchange Page 4