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Home My WebLink About20062362.tiff City&County of Denver JOHN W. HICKENLOOPER Mayor August 15, 2006 Weld County Commissioners Weld County PO Box 758 Greeley, CO 80632 Dear Sir or Madame: Enclosed is the Noise Report for the 2nd Quarter of 2006 (April 1, 2006 to June 30, 2006) from the Denver International Airport Noise Office. If you have any questions regarding these reports, or if I can be of further assistance, please contact me at (303) 342-2360. Sincerely, • Andrea C. Christensen Denver International Airport Aviation Noise Analyst DENVER I NTERNATIONAL AIRPORT Department of Aviation Airport Office Building 8500 Pena Boulevard Denver,Colorado 80249 303.342.2200 www.FlyDenver.com /5 i- ga L 2006-2362 © agate DEN 2"d u rter 2006 ' ' c i.s:e R x r August 11, 2006 Denver al Airport Noise Office Second Quarter 2006 News The number of potential Class II NEPS violations registered during the second quarter of 2006 was one. During the second quarter 2005, there was one potential Class II NEPS violation. Please see page six for DEN NEPS information. There was no potential 65 DNL noise contour violation for the quarter. The 65 DNL contour continued to be completely contained within the boundaries of the City and this issue: County of Denver. Please see page five for DEN contour map. There were 63% fewer noise complaints received during this quarter, as compared to System 2 the second quarter of 2005 (232 vs. 640 in 2005). ine Policy 3 The number of households registering at least one complaint increased by less than 1% (72 vs. 68 in 2005). Five households registered a combined 37% of total com- plaints. and RMT map 4 Weather Impacts at DEN ,2nd Quarter Contour 5 Varying weather conditions often have a significant impact on the ability to minimize aircraft nose. Changes in wind direction and intensity, low visibility due to fog or snow, NEPS Table 6 and the unpredictable nature of summer thunderstorms are just a few of the weather- related factors which can dictate how DEN must operate. To ensure safe flight, noise Complaint and Op- 7-8 abatement procedures must sometimes be temporarily altered or suspended during pe- erational Statistics riods of inclement weather. Probably the most difficult weather situation to deal with from and air traffic, and RWY Utilization 9 from a noise standpoint is the summer afternoon buildup and movement of thunder- storms. During this situation, air traffic controllers must constantly redirect aircraft in order to avoid flying too near (or worse, through) a thunderstorm. In addition to keeping aircraft in the immediate vicinity of DEN away from local storms, controllers often must completely reroute traffic regionally in order to avoid storms well beyond the immediate Denver area. If a severe storm (or a line of storms) Special points of happens to block a major arrival or departure corridor, controllers may have to send interest: that traffic into or out of the Denver area through a completely different block of air- space. What that means is that aircraft which might normally depart, for example, to • One potential NEPS the west over the mountains, might have to depart Denver to the north or south in- violation, page 6. stead, depending on their destination. This can substantially alter air traffic patterns, • Operations are up, even though skies in the vicinity of Denver may be clear at the time. page 7. A phenomenon often associated with thunderstorms is the microburst, which causes • Complaints are down, a rapid and severe localized change in wind velocity and direction. This sudden shift page 7. can be hazardous to aircraft, especially when they are attempting to land. Microbursts and other convectively-induced wind shears are fairly common at DEN. The Low Level • Complaint map, page s. Wind Shear Alerting System (LLWAS) is an excellent tool for detecting these hazards at or near the airport. Computer algorithms compare the surface wind information from 29 sensors placed around the airport with low level wind velocity data from DEN's Ter- minal Doppler Weather Radar. The algorithms calculate airspeed loss or gain at a pre- determined distance from a runway. The system displays Wind Shear Alerts (WSAs) and Microburst Alerts (MBAs), the latter being more severe to air traffic. The Denver Termi- nal Radar Approach Control supervisor will usually shut off all departures and arrivals when he sees persistent widespread MBAs or WSAs on the LLWAS display. Shut-offs typically last from 30 minutes to more than an hour, depending on storm-motion, inten- sity, and coverage. A long shut-off could impact the national ATC system. Denver Noise Office-Denver International Airport-Airport Office Building- 8500 Pena Boulevard-Denver, CO 80249 • - - - `r r r 2006 August 11,2006 Page 2 DEN Airport Noise and Operations System The DEN Airport Noise and Operations Monitoring System (ANOMS) is a state-of-the-art computer system designed to enable the City and County of Denver to monitor aircraft noise in the vicinity of the airport. In addition to monitoring noise levels, the system calculates Noise Exposure Performance Standards. (NEPS) at 101 grid points in Adams County (see map on page 3 for NEPS locations). 1 The DEN ANOMS system monitors noise levels at 27 permanent and 4 portable noise monitoring terminals. These terminals are located through- out the Denver metro area (see map on page 3 for RMT locations). The system also records the movement of all aircraft in the vicinity of 'iffr�•' opt DEN by utilizing FAA air traffic control radar data. This makes it possible to Remote Monitoring match actual flights with noise events. Terminal(RMT)with In addition, the ANOMS system records weather information from three a weather collecting y station. remote stations, which include a RACAL recording device to record pilot/ controller radio transmissions. ARTSMAP ARTSMAP is a specially designed noise modeling program that automatically creates noise contours. ARTSMAP is designed to create contours from actual ra- dar flight tracks that our office receives from the FAA ARTS system which is sent via modem, eliminating the need for manual data manipulation. The ARTSMAP _:•fit software is installed on a computer in the Noise Abatement Office. The program analyzes, views, reports, and stores the data. Currently, ARTSMAP is used at sev- eral major airports nationally. It allows the DEN Noise Abatement Office to per- form noise data analysis, generate daily automated noise contours, receive de- tailed runway utilization, and airline fleet mix identification. DEvsTerminal tent roof view from the South. Land Use and Zoning Urban growth and development in the areas surrounding DEN, particularly non- compatible residential and other noise-sensitive land uses, is of utmost concern to the City and County of Denver. The Noise Office has developed noise contours surrounding the airport, inside which certain types of land uses are not recom- mended. The 65 Ldn noise contour (average decibel level with a 10 decibel pen- alty applied to nighttime operations) is a line inside which, under Federal guidelines, no residential develop- ment should occur. * . The operational 65 Ldn noise contour for the air- port, as created by ARTSMAP, is included in this report. However, for DEN, the 60 Ldn noise contour is used for a '" compatible land use planning by the surrounding juris dictions, in accordance with guidelines promulgated by the Denver Regional Council of Governments and the __EL" Denver/Adams County Intergovernmental Agree ment. Additional mapping for DEN that includes the , - - applicable noise contours is available upon request. alrin Noise Centimes for um us.mn•i"o -,a— rt::2006 August 11,2006 Page 3 _. .,a y...._ _. DEN Noise Hotline Policy The purpose of the DEN Noise Complaint Hotline is to provide an opportunity for individuals to express their concerns regarding noise generated by aircraft operating at DEN. Citizens are asked to leave their name, address and the date and time of their complaint on the hotline. Complaints are downloaded daily by our Noise Analysts and then transcribed into the ANOMS system, where specific complaints can be matched to individual flight tracks. It is essential for all information to be entered correctly in order for the system to be effective. Profanity will not be tolerated, and will result in the complaint not being registered. Any attempt to deliberately tie-up or abuse the Hotline may result in police action. Phone harassment is a state criminal offense and can carry a jail sentence and/or fine. Threats involving aircraft and/or the airport are a very serious matter and are a federal criminal offense. To make a threat, even jokingly, will result in a notification to the Denver Police Department and may involve an FBI investigation. DEN Arrival Glossary Of Terms Sound: A rapid variation in air pressure, which is perceived by the ear and brain as sound. Noise: Generally considered to be any sound, which is deemed undesirable by an individual. Decibel: Sound is measured by its pressure or energy in terms of decibels. The decibel scale is logarith- mic; when the decibel level increases by 6 dB, the measured sound is twice as loud. Noise Abatement: A measure or action that minimizes the amount or impact of noise on the environs of an airport. Noise abatement measures include aircraft operating procedures and use or disuse of certain runways or flight tracks. These operating procedures are controlled by the FAA. A-Weighted Sound Level (dBA): A type of sound level measurement which reduces the effect of very high and very low frequencies in order to mimic the response of the human ear. Nearly all aircraft sound level measurement is conducted using A-weighting. Equivalent Continuous Sound Level (Leg): A measurement of the average sound energy experienced over a period of time. This average sound level is expressed in decibels, and includes a notation of the period of time, which it covers (such as Leq (24) for an average of the sound level over a 24-hour period). Day Night Level (Ldn): Also referred to as DNL. Similar to a Leq measurement, but is conducted over at least a 24-hour time span and includes a 10dB nighttime penalty. For an Ldn calculation, all noise that occurs at night (defined as 10:00 pm to 7:00 am) is artificially increased for the public's increased sensi- tivity to noise during these hours. Noise Contour: A line surrounding an airport that encloses a geographic region, which is exposed to a particular Ldn level. These contour lines are nested in such a way that contours closer to the airport gen- erally surround areas that experience higher noise levels than contours farther out. Annual Ldn contours are used to determine whether certain types of zoning or land uses are compatible with particular annual Ldn noise levels. 65 Ldn is considered by many federal agencies to be the level at which residential land use becomes incompatible. Remote Monitoring Terminal (RMT): Consists of a noise level analyzer, a weatherproof microphone, a system controller, a power supply, and a dedicated telephone line to download noise data to the ANOMS system, all mounted in a weatherproof cabinet. August 11,2006 Page 4 Noise Exposure Performance Standards (NEPS) Grid Coordinates, IGA Contour, and Remote Monitoring Terminal (RMT) Locations I N .d.. W O O O to co c cc V `O �`O c m � s }a O o Z Z t 4 0 `a o 0 o m Q W �, �..... Q 8 m ai c a ^ $ii so Z re 0 G * m •-• U' 2 U 0 I _ i i o c� / / J 11 * Li ji1.S U • e E Z 0 •v rep 'a-Wwx j Z� / C 3 U l j 3 i U a 1 13 _ _ _ i mot` at a al _� V. et (n a��f- ��11 I , Q m N-. `.,. \* � � �1 w\'.._ I 0 y/� C / \� 3 O 4I( i�� a i C T• o_ ,4O C ® S * ® o WQ ® ® - Ca a ® S ®.4r1 U z Q 8 t3 a I A W 1401 a f3 M►— n ® a O Ne Q E. H ®*® o 'Sc x • c m i jt CI ` B a • • D ® 8 �� ® ® es >r I �, w f cr ® ® icy ,a a A*ey 1 c a ce • • e teem .® ®*® ® # ,t • . � ' ® . n ..y, a .® - CD T ® ®t ® ® ® �� ®1 0, L_..30 , re w a . k. 1 a [Al i -2006 August 11,2006 Page 5 2nd Quarter 2006—DEN 65 LDN Contour e % ° t J c0 % c lb o N m o o. I a B ®o :Weld W —1r E a m I o S .6. P a It .g ciQft, Q AP m'O o 0 3 rt °o Adams , 0 8 Adams El w o —..":2_17--->- —..":2_17--->- a \r- - ri Rocky Mountain L -_; _.. Arsenal �' I '} —. Legend n f al - -- DEN Property Line 4 ca 1 a - County Boundary Noise Contours FGA 65 LDN Contour De^ aJ r—l--1 -- DEN 2406 65 LDN Contour e Adams Nii AkArapahoe Or DEN 2Q06 65 LDN Contour 0 0.5; ® :Wiles DEN 2nd Quarter Noise Report 2006 August 11,2006 Page 6 2nd Quarter 2006—Denver/Adams County IGA NEPS Values Area 2 Area 1 2Q06 2Q06 Grid IGA Annual Calculated Difference Grid IGA Annual Calculated Difference Points Leq(24) Leq(24) Leq Points Leq(24) Leq(24) Leq A,1 38.6 36.5 -2.1 C,4 44.2 35.5 -8.7 A,2 37.6 37.1 -0.5 C,5 36.7 33.8 -2.9 A,3 42.3 38.1 -4.2 C,6 36.0 33.4 -2.7 A,4 45.3 39.2 -6.1 D,4 41.1 34.8 -6.3 A,5 43.9 40.3 -3.6 D,5 34.2 34.1 -0.1 A.6 37.5 38.9 1.4 0,6 36.0 34.0 -2.0 A,7 37.7 37.2 -0.5 D,7 41.4 35.0 -6.4 A,8 36.5 36.3 -0.2 E,4 38.3 34.8 -3.5 A,9 36.3 36.1 -0.2 E,5 34.8 34.9 0.1 A,10 37.6 36.2 _ -1.4 E,6 _ 36.7 33.8 -2.9 A,11 39.2 35.5 -3.7 E,7 41.4 34.4 -7.0 A,12 41.2 34.3 -6.9 F,2 51.7 41.4 -10.3 6,2 39.5 37.6 -1.9 F,3 43.7 37.1 -6.6 6,4 42.5 39.8 -2.7 F,5 37.3 33.4 -3.9 _ 8,5 43.1 41.1 -2.0 F,6 38.5 33.3 -5.2 B,6 39.0 39.4 0.4 F,7 42.1 34.2 -7.9 B,7 39.0 37.5 -1.5 G,2 51.2 42.7 -8.5 B,8 38.0 36.8 -1.2 G,3 42.1 37.7 -4.4 6,9 38.3 37.1 -1.2 G,4 40.2 34.4 -5.9 6,10 • 39.0 37.1 -1.9 H,2 50.1 44.2 -5.9 6,11 40.4 36.4 -4.0 H,3 46.0 38.7 -7.4 B,12 42.6 35.2 -7.4 H,4 46.1 35.3 -10.8 C,2 41.0 38.4 -2.6 C,3 43.3 38.9 -4.4 Area 3 C,4 43.5 40.5 -3.0 2Q06 C,5 43.4 42.1 -1.3 Grid IGA Annual Calculated Difference C,6 43.3 39.9 -3.4 Points Leq(24) Leq(24) Leq C,7 43.3 37.7 -5.6 A.-1 38.9 32.4 -6.5 C,8 42.6 37.4 -5.2 A,0 39.6 32.4 -7.2 C,9 42.2 38.2 -4.0 A,1 43.2 33.1 -10.1 C,10 41.6 38.1 -3.5 A,2 45.7 34.2 -11.5 C,11 42.5 37.0 -5.5 A,3 45.6 35.5 -10.1 C,12 44.3 35.5 -8.8 B,-1 37.9 32.4 -5.5 D,2 41.7 39.4 -2.4 6,0 39.2 32.4 -6.8 0,3 46.2 39.5 -6.7 B,1 42.6 33.0 -9.6 D,4 48.4 41.1 -7.3 6,2 45.8 34.0 -11.8 D,5 48.2 43.3 -5.0 6,3 45.7 35.3 -10.4 0,6 46.2 40.5 -5.7 C,-1 36.7 33.3 -3.4 _ D,7 44.2 38.1 -6.1 C,0 37.1 33.3 -3.8 D,8 43.7 38.4 -5.3 C,1 39.5 33.6 -6.0 D,9 43.1 39.3 -3.8 C,2 44.8 34.4 -10.4 D,10 44.9 38.6 -6.3 C,3 46.5 35.3 -11.2 D,11 44.5 37.1 -7.4 D,-1 32.6 34.1 1.5 D,12 45.1 35.2 -9.9 D,0 33.3 33.7 0.4 E,l 42.4 38.7 -3.7 D,1 37.3 33.7 -3.6 E,2 42.2 40.6 -1.6 D,2 43.0 34.1 -9.0 _ E,3 46.7 40.4 -6.3 E,-1 31.4 33.9 2.5 E,4 51.2 41.8 -9.4 E,0 33.1 33.2 0.1 E,5 51.0 44.6 -6.4 E,1 36.2 33.0 -3.2 E,6 44.6 41.3 -3.3 E,2 40.6 33.4 -7.2 E,9 43.1 40.1 -3.0 F,1 36.5 32.9 -3.7 E,10 43.1 38.7 -4.4 F,2 39.4 33.7 -5.8 _ E,11 1 46.1 i 37.1 -9.1 G,1 42.5 33.9 -8.6 'l wtarX iS , r r ,n , 1-',` t 2006 August 11,2006 Page 7 2nd Quarter 2006 — DEN Complaint and Operational Statistics t'` " ° calls by Community * No.of No.of No.of No.of Community* Calls Callers cans cans 2q06 b Calls C as forCommunity* 2Q06 2Q05 2Q04 Total y C ity* Arvada 0 0 1 1 ParkThornton Watkns Aurora 67 11 127 186 parker Thornton 3% trinster Bailey 0 0 0 1 Lochbuie 2% 6/° 3% Aurora 29% Bennett 4 2 0 0 4% Bennett Boulder 4 1 23 50 Lakewood 2% Brighton 15 6 52 75 6% Commerce City 41 14 27 78 Henderson Boulder Denver 7 5 10 18 2% 2% Elizabeth 24 5 215 53 Brighton Englewood 1 1 0 0 Evergreentzabeth Denver Commerce 6% city Evergreen 5 1 33 81 p/° 10% 3% 18% Fort Collins 0 0 0 14 Golden 1 1 5 2 Henderson 5 2 0 2 Highlands Ranch 0 0 0 1 Top Five Complainants Vs. All Others Hudson 1 1 0 3 Kiowa 1 1 1 0 13% Lakewood 13 1 19 40 6% Lochbuie 9 2 5 3 Louviers 0 0 0 1 63%-t----6% Northglenn 0 0 8 5 6% Parker 5 5 17 68 Thornton 15 8 62 304 `6% Watkins 7 3 8 20 Westminster 7 2 26 27 Wheatridge 0 0 1 0 Overall Total 232 72 640 1033 *See map on next page for location of known noise complaints. - ,• _, Noise Complaint Calls - Daytime vs. Nighttime r z o Time Complaint 0 o' ,3, a> 3 c` S. c g n 0 n 2Q06 Received iv w n < m < c 3 C. 3 3 April to June 2006 Total .z , = — 0 mro m m Total Day Hours 40 33 41 35 93 78 206 320 (7:00 am to 9:59 pm) Nigh[ Hours 4 4 4 7 12 7 26 38 (10:00 pm to 6:59 am) Total 44 37 45 42 105 85 232 358 - , e [ ;ZOOs Total Operations vs. 2006 Total Operations 55000 — _ 53588 - 55000 804 5 50000 4 230 TL 47942 40000 I 127 I I I I I I I I 40000 Jai Feb Ma Apr May Jul Jul Aug Sep Oct Nov Dec +2005 —x-2006 r 4 ..y 1 ' 2006 August 1 I,2006 Page 8 2nd Quarter 2006 — DEN Complaint and Operational Statistics • in• • I-- Z U)a. r. ;‘? `+0,—..e. V • • • i , 1 1 o Ir v, ._ . w I • z zQ Lu D " 9 o � ` • • • o • r • • ,9— "t. ^w it • ¢� - > { •• 7 � • � �� u i � .. -->- Ira xi IIII, r - Mtn W 'bill ;, '• a '4110- i. 0, ,c,,z 2 41-, c• LAI �tq / k b• • w pa. O wV • n• x (A� Y k co 40 Ct t. rAtillHa OW 4.1�- • te`r �., P" . W7I `•/! `k .a At, . t 7,e-re+ ;.(- 7,e-resport 2006 August 11,2006 Page 9 2nd Quarter 2006 — DEN Runway Utilization II ARR tit 13.0% "�-. ARR DEP DEP,,��--ARR DEP ARR 10 1% • 31.0% 0 O%n1 5.1 i 26 06% 244% Z - Z - DEP 17- 0.0% ARR \.1711 4.5% ARR DEP 0.1% 84% 118.7% 17.4% ---.5 DEP DEP} DEP ,J L 5.0% 0.2% 2.0% ARR ARR 5% ;IL\ 31.4" DEP ir 0 2% 30.0% DEP ^�, ARR DEP DEP V`-�II DEP ARR ARR 07 4 f Ir.---2--; 68%'�� 3.4% 00°/ 171% 0.3% ARR 35L 2005 vs. 2006 DEN Daytime Arrivals & Departures 49000 ---- 49000 = 47000 - � - 47000 .c °1 4 - 45000 O1 w 5000 43000 7 43000 w # 41000 - - 41000 # 39000 I I I I I I 39000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec — 2005 -a-2006 2005 vs 2006 DEN Nighttime Arrivals& Departures III 2300 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec X2005 +2006 IIIPI_ r DENVER IIIIPrr killing 1 NTERNATIONAL AIRPORT VIS'ON Working together we will be the world's finest airport. MISSION Enhancing economic prosperity and c,ua':ity of life in the Denver region by connecting its people and products to the world. Leading the aviation industry in safety, service convenience efficiency, innovative practices, aesthetics and financial strength. Please visit www.flydenver.com m for other DEN Noise Office Reports and information. Denver International Airport Noise Office Airport Office Building - Mail Code 285 8500 Pena Boulevard 6th Floor, NW Corner Denver, CO 80249 Hello