20250327 07360300 1.0 TRUE 500000 5000 ItemDescription The Federal Aviation Administration (FAA) uses the 65 DNL (Day-Night Average Sound Level) as the threshold for identifying significant aircraft noise exposure and incompatible residential land use, recommending land-use controls be implemented above this level. <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>DNL, or Day-Night Average Sound Level, is the FAA's primary metric for assessing cumulative aircraft noise exposure over a 24-hour period, taking into account both daytime and nighttime noise levels, with a penalty for nighttime noise. The FAA considers aircraft noise exposure above DNL 65 dBA to be significant, meaning it can create a significant annoyance for residents and is incompatible with residential land use. The FAA uses DNL 65 as a basis for its "noise goal" of reducing the number of people exposed to significant aircraft noise around U.S. airports. The FAA uses DNL 65 to determine the onset of substantial impact and to identify areas where land-use controls or noise mitigation measures may be needed. The FAA recommends that land-use controls be implemented in areas where noise levels exceed the 65 DNL contour line. Part 150 studies, also known as Airport Noise Compatibility Planning, are conducted by local airports to generate noise contour maps that identify homes within the 65 or greater DNL, which are then considered for sound insulation. </SPAN></P><P><SPAN>https://services5.arcgis.com/YTApDBs0YanBdxkq/arcgis/rest/services/Land_Use_Restrictions2/FeatureServer/0</SPAN></P></DIV></DIV></DIV> Hillsborough County Aviation Authority GIS Department Tony Mantegna | Tampa International Airport | Senior Manager of Planning Phone: (813) 781-8289 | Email: TMantegna@TampaAirport.com Brooke Nix, CM | Tampa International Airport | GIS Applications Analyst Phone: (813) 697-6587 | Email: bnix@TampaAirport.com email: itsgti@tampaairport.com address: SkyCenter One - Level 3 - ITS Neighborhood DayNightAverageSoundLevel INFRASTRUCTURE AIRPORTS AIRFIELDS RUNWAYS AIRSTRIPS AVIATION HILLSBOROUGH COUNTY <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Data should be used for informational and planning purposes only and should not be construed as legal advice. The HCAA does not guarantee absolute accuracy, and independent verification is often recommended before making decisions.</SPAN></P></DIV></DIV></DIV> 20260121 /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAMCAgMCAgMDAwMEAwMEBQgFBQQEBQoHBwYIDAoMDAsK CwsNDhIQDQ4RDgsLEBYQERMUFRUVDA8XGBYUGBIUFRT/2wBDAQMEBAUEBQkFBQkUDQsNFBQUFBQU FBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBT/wAARCADIASwDASIA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm p6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA AwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSEx BhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElK U1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3 uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD9U6KK KACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAoooo AKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigA ooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACi iigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAq6l qEGlWM93ctsgiXe7UljfRalZQXMHMU0ayr/utzXOfFJ9vgLVx/eRB/4+taPgtt3hXTP9mBVquX3e YV9bG7RXL+B/FEninTru5kVYxFcvEqp/dWuopNW0YwooopAFFFFABRRRQAUUUUAFFFFABRRRQAUU UUAFZmvazDoWlz3sx+SNflXP3m/u07XbyWx0m7uYVUyxRll3VwPhOG98fXUWoauGl063Ctbps2JI 39//AGquMeZcz2JbtodP4L1rU9atZptQthBHn9033dwrqKT7tLUt3d0NBRRRSGFFFFABRRRQAUUU UAFFFFABRRRQAUUUUAFFFFAHD/FSVD4fit93M9wqbf8AgLN/Sl0jUjY/DaS6Rl823tZdv+8u+uX8 UbrjxheC5XzJbcJ5Wf4Vb+7WHefabaK4gtG8m0Z7d50/gbdLXqLC/uIyvu/zOX2lqjVjsfhL+5m1 O2X7iLFL/wACbfXpVeZ/DNtviTW0/wCmFvt/8i16ZXLio8taSRrSd4IKKKK5TUKKKKACiiigAooo oAKKKKACiiigAooooAz9btZL7R7u2h2iWSNkXdVXwfpc+i+HbKyudplgTZ8vStqigAooooAKKKKA CiiigAooooAKKKKACiiigAooooAKimmSGNpHbai/eqWmsodcGgDmofiP4Zm+7rNqf+BVdh8YaJcR h49StnU9G3UP4N0KT72j2Lf9sFqJPA/h+Ncf2LY/9+Fp6AcR4v2/8Jlf4+/5Vv8A+z1jbd3hvWpP 4l1O1i/4D8lXNVuvtnibWJ2++s/2f/gK1nzXkVnY6naStse6uoLiJP7zK6L/AOyV7vK44aC7Nfmc F/3kjofATeT4sdE/5a23z/8AAfu/+h16lXmHw/vLSz1rVZ7m7ht/3cSKkjBf79eh2epWl8zLbXMc xX+4+6vNxb5q0rHVSVoIuUUUVxmoUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQA UUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAeGabN9st3vP47pvtDf8CrP1J9msW+5mSLb9/d8i /wD7dW9Bha20ayib76xKld18NdLjm0y8vZo1dbqfKo67tuz5P/Za+lxE1QpRXoedTi5zZzvgvw7p HivVtU/tPToL9I44hE1xHu2t8+//AHf4a9C8P+C9I8LySyabaC2aVdrYNbEdvFBu8uNULfe2r1qa vAqVHUm5dzvjHlVgooorEoKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKAC iiigAooooAKKKKACiiigAooooAKKKKAPD7x9llL82z5di1614csxp+g6fAyhHWBN3+9t+auS0j4f XdtrUD388N7p8K7l+XDs38O6vQ69HGYhVmlDZHPRg4J3CiiivOOgKKKKACiiigAooooAKKKKACii igAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKK ACiiigAooooAKKK4zxf40bQtb0fTLYRy3F5MqSK/92mlfRCbsdnRSfw0tIYUUUUAFFFFABRRRQAU UUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFAEM4 d4JFjbbJtwrf7VcVpvw7EiyTavctc6m94l39oj4ZduNqf7vy13dFO4BRRRSAKKKKACiiigAooooA KKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAo oooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACii igAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKK ACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooA KKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKAP/Z