processed when compliance with criteria cannot be achieved, the obstruction poses little or no risk to
flying safety, and there are no other alternatives. When proposed objects or facilities will violate
airfield imaginary surfaces, safe clearance, or other design criteria established in this manual, they must
be analyzed to determine potential impact to aircraft operations before construction activities begin.
Facilities listed as permissible deviations (see attachment 14 beginning at paragraph A14.2) do not
require waiver if sited and constructed properly. The Major Command Vice Commander may grant
permissible deviation status for other airfield related facilities or systems that are unique to the
command but must provide acceptable construction standards, siting criteria, and aircraft clearance
requirements for such items. Facilities constructed under previous standards should be documented as
exemptions and programmed for replacement away from the airfield environment at the end of their
normal life cycle, or when mission needs dictate earlier replacement. Exception is allowed for
facilities located beyond and beneath the Building Restriction Lines (BRLs) established in 2001 as a
result of the Airfield Obstruction Reduction Initiative. These exempted facilities may remain without
waiver for an indefinite period, and may be renovated to extend their life-cycle if the intended use of
the facility fits within the approved Category Groups listed as appropriate for siting within the
boundaries of the BRL (see Attachment 19 for the guidelines provided to establish these areas and
facilities approved for construction or renovation within this area.)
A18.104.22.168. When requesting a waiver for obstructions, consider grouping adjacent supporting items
with a controlling obstruction, or grouping related items such as a series of drainage structures, as one
waiver. Example: The base operations building violates the 7H:1V Transitional Surface and apron
clearance criteria. There are also four utility poles, a 36-inch tall fire hydrant, and numerous trees and
shrubs located on the side of the building that is farthest away from the apron. These items are
essential to provide architectural enhancement and utilities for this structure, but they also violate apron
clearance criteria. Because these items are isolated from aircraft operations by the base operations
building, they would not become a hazard to aircraft operations until the base operations building is
relocated. Therefore, the base operations building is the controlling obstruction. Document the base
operations building as an exemption (constructed under previous standards) and develop one waiver
request for all supporting structures to analyze impact to aircraft operations.
A2.2.2. Waiver Processing Procedures. Process temporary waivers for correctable violations. Process
permanent waivers for items that cannot be corrected.
A22.214.171.124. Temporary Waivers.
A126.96.36.199.1. Establish temporary waivers for correctable obstructions. Temporary waiver requests
must indicate the action planned to correct the violation and an estimated completion date. Follow
the guidelines within Attachment 6, Extract of Federal Aviation Regulation Part 77, Objects
Affecting Navigable Airspace, and provide notification to the Federal Aviation Administration
(FAA) for objects that may affect navigable airspace. Also see Attachment 15, Construction
Phasing Plan and Operational Safety on Airfields During Construction.
A188.8.131.52.2. The Base Civil Engineer's representative prepares these waiver requests and obtains
coordination from airfield management, flying and ground safety, flight operations, logistics,
TERPS, and communications, before requesting approval from the Wing Commander.
A184.108.40.206. Permanent Waivers. Establish permanent waivers for violations that cannot reasonably be
corrected and pose little or no threat to flying operations. Violations caused by natural geographic
features or that result from constraints due to construction of the airfield under a previous less stringent
standard, or development of facilities on overseas bases where the US has no authority to implement
USAF standards are examples of cases where permanent waivers are appropriate.