07-09-18 Drainage and Flooding Committee Meeting

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IML standards. This design standard sets geometric and safety offset requirements for Runway Safety Areas (RSA), Object Free Areas (OFA), and other dimensions for runways and the runway -to -taxiway offset. The ALP also indicates the geometric design group (ADG) is "I I" (wingspans up to 79 feet). This aircraft size standard sets requirements for taxiway and apron OFAs, parking configuration, hangar locations, and taxiway -to -taxiway separation. It is noteworthy that the ALP lists the B-11 standard, but further specifies the "critical aircraft" in a table listing for the airport standards at La Porte. The aircraft listed (King Air 100 for Runway 12-30 and Cessna 421 for Runway 5-23) are not B-11, but are each B-I aircraft. For operating maximum takeoff weights (MTOVV)2, the Cessna is listed at 7500 lbs., while the King Air 100 is listed at 12,000 lbs. Conversely, the ALP lists the traffic weight ratings as 23,000 and 25,000 pound aircraft weight limits for Runways 12/30 and 5/23 respectively. The most recent airport data posted from FAA in Form 50103 shows traffic operations have remained steady at a total of 29,050 annual operations. This total is split 1/3 as itinerant with the other 2/3 being local operations. The data does reflect an increase in based aircraft. All aircraft are listed as either single- and multi -engine aircraft, with no jets listed. The airport also claims 1 based helicopter. 2.3. FAA DESIGN CRITERIA As noted above from the ALP information, the airport is listed as a B-11 airport. This defines such requirements as the runway to taxiway separation of 240 feet. Runway Design Group The runways for La Porte are listed as B-11 runways, with a standard width of 75 feet, which is applicable on approach limits down to % mile visibility approaches. There is only one non -visual approach developed for La Porte, and that is a GPS approach to Runway 30. Under this "LPW approach to approach category C, the minimum visibility range is 1 mile. Therefore, the runway width is applicable with room to get a better approach to % mile before the standard width on the runway is too small. Other dimensions applicable to this category include a RSA width of 150 feet and a ROFZ of 500 feet. Taxiway Design Group Since the last ALP update, the FAA has added criteria for taxiway design based on aircraft geometry, namely the cockpit -to -main -gear and the main gear width dimensions, for ensuring taxiway edge safety margin (the distance for the outside aircraft wheel to the edge of pavement) is maintained in taxiway intersection fillets. Drainage Criteria FAA AC 150/5320-5D - Airport Drainage Design, Unified Facilities Criteria Surface Drainage Design, states the 5-year storm event is to be used with no encroachment z FAA Worksheet: Aircraft Characteristics Database-v1-201609.xlsx 3 FAA Airport Data Form 5010, for 12 months ending 12/30/2016. Page 14