Arlington Municipal Airport Development Plan Arlington Airport Development Plan | Page 177
The proposed 700‐foot displacement in Alternative 2 would allow for proper RSA and ROFA prior to the
landing threshold, as well as allowing for the approach RPZ to remain in its existing location, which is
clear of incompatible land uses farther north to include U.S. Interstate 20 and commercial business
complexes. Approximately 1.68 acres of the RPZ would still fall outside of Airport control. Under this
scenario, the RPZs remain as they currently exist.
With a 700‐foot extension proposed, the TORA and TODA would increase to 6,780 feet for Runway 16.
In order to gain the full use of runway pavement in the TORA and TODA calculations, the assumption
made is that Southeast Green Oaks Boulevard is allowed to remain in the departure RPZ beyond the
south end of the runway. The ASDA would decrease to 6,700 feet to account for the RSA deficiency
that exists beyond the south end of the runway. It should be noted that under this alternative the
ROFA deficiency could be acceptable through a Modification to Standard as previously discussed. The
ASDA on Runway 16 would still account for nearly the full length of the runway which is preferred for
jet aircraft since this is the primary direction for takeoff during times when high temperatures and high
density altitudes require greater runway lengths for larger aircraft. In order to account for the 700‐
foot displaced threshold and 80‐foot RSA insufficiency, the LDA on Runway 16 would decrease to 6,000
feet.
Even though 6,780 feet of pavement is proposed in Alternative 2, the TORA, TODA, ASDA, and LDA on
Runway 34 are all calculated to remain at 6,080. The TORA and TODA must be reduced in accordance
with the location of the departure RPZ beyond the north end of the runway, thereby reducing the
takeoff calculation by 700 feet. The ASDA and LDA would be 6,080 feet in order to account for the full
1,000 feet of RSA and ROFA needed beyond the north end of the runway. This will allow the localizer
to remain in its current location. It should be noted that under this alternative the Airport should pur‐
sue the acquisition of residential land uses in the southwest portion of the approach RPZ in order to
clear it of the homes. It is assumed that portions of South Collins Street and Southeast Green Oaks
Boulevard will be allowed to remain in the existing approach RPZ.
Exhibit 4F accounts for mitigating the RSA deficiency that exists beyond the south end of Runway 16‐
34. Previous discussion has indicated that the FAA and TxDOT are aware of the RSA deficiency and a
mutual decision was made at the time to maintain the existing runway environment, in essence, allow‐
ing the RSA deficiency to remain. During this planning process, it is prudent to analyze this issue and
present alternatives for conforming to full safety standards to the extent practicable. Table 4B further
outlines the declared distances that would be proposed with three separate scenarios dealing with
safety standards associated with the RSA beyond the south end of the runway when taking into ac‐
count the 700‐foot extension as previously detailed. It should be noted that one of the scenarios also
accounts for meeting full ROFA standards.
Alternative 2 also accounts for improvements to airfield geometry included in the runway’s high ener‐
gy area. Similar to Alternative 1, the proposed high energy area is outlined and the placement of cor‐
responding taxiway connectors is depicted on the west side of the runway to adhere to FAA guidance
regarding high energy intersections.
Chapter Four - 31