SAFETY - Policy on Use of Aircraft-Warning Marking at Cableways In Reply Refer To: Branch of Operational Support Mail Stop 405 Sunset Date: Sept. 2005 September 19, 2000 WATER RESOURCES DIVISION POLICY MEMORANDUM NO. 2000.13 Subject: SAFETY- Policy on Use of Aircraft-Warning Marking at Cableways It is Water Resources Division (WRD) policy to comply with Federal Aviation Administration (FAA) recommendations regarding use of aircraft warning markers at cableways. Congress has charged the FAA with the responsibility to promote the safety of aircraft and the efficient use of navigable airspace. The regulatory framework that governs the conduct of the FAA's obstruction evaluation program is Title 14, Code of Federal Regulations, part 77. As a part of the obstruction evaluation program, the FAA makes recommendations on marking structures that are considered obstructions to air navigation. Marking Criteria The obstruction standards set forth in part 77 that pertain to cableways include height and proximity to airports. Any structure that exceeds an overall height of 200 feet (ft) above the surrounding terrain should normally be marked. The FAA may also recommend marking a structure of lesser height located within 20,000 ft of an airport or 5,000 ft of a heliport. The FAA recently conducted an evaluation of USGS cableways in the Washington District and concluded that the cableways did not exceed 200 ft above the surrounding terrain or exceed the obstruction standards contained in part 77. Consequently, the FAA did not recommend marking any cableways. Required Actions 1. New Cableways -- plans for construction of new cableways that exceed 200 ft above the surrounding terrain, or structures of a lesser height within 20,000 ft of an airport or within 5,000 ft of a heliport, shall be submitted to the FAA for an aeronautical study to determine whether marking is necessary. 2. Existing Cableways -- District Chiefs shall notify the Regional Hydrologist within 6 months of the date of this memorandum to verify that: a. all active and deactivated cableways in their districts have been reviewed; and those cableways that exceed 200 ft high, or structures of a lesser height within 20,000 ft of an airport or within a 5,000 ft of a heliport, have been submitted to the FAA for an aeronautical study. (A list of the cableways submitted to FAA will be provided to the Regional Hydrologist); and b. all active and deactivated cableways in their districts that are presently equipped with aircraft warning markers have been submitted to the FAA to have an aeronautical study completed. (A list of the cableways equipped with markers will be provided to the Regional Hydrologist.) The purpose of the aeronautical study of existing markers is twofold: 1) to alert the FAA of the existence of a marked structure, and 2) to obtain an FAA recommendation on whether the aircraft warning markers shall be maintained, and if they are to be maintained, whether they meet FAA standards. 3. District Chiefs shall notify the Regional Hydrologist within 1 year of the date of this memorandum to verify that any necessary actions or modifications were made to conform to FAA recommendations. 4. The results of the FAA aeronautical study shall be retained by the districts in their appropriate gaging station permanent files. A request for an FAA aeronautical study requires the submission of a completed FAA Form 7460-1, Notice of Construction or Alteration to your FAA Regional Office. The FAA provides this service at no cost to the USGS. Costs will be incurred by the USGS if the FAA recommends that the structure be marked, or if a presently marked cableway needs to be modified or have the markers removed. The following electronic documents have been attached to assist in the submission: Requirements for notifying the FAA/Addresses of the Regional Offices Instructions for completing FAA Form 7460-1 FAA Form 7460-1 Any questions regarding this policy and guidelines should be directed to your Regional Safety Officer. /signed/ Catherine L. Hill Associate Chief Hydrologist for Program Operations 3 Attachments (See the words Requirements, Instructions, and FAA Form) Distribution: A, B, S, FO, PO, DC This Policy Memorandum supersedes WRD Memorandum No. 84.57.