Brief description of project and relevance to the contract :

(35% A&E design services)

1. RUNWAY : The 30 m wide emergency runway was constructed in 1967. There is no subsurface drainage system along the emergency runway. The base course gradation has been ruined due to existence of silt and clay materials’ capillarity effect. This case accelerated deterioration of the pavement. All asphaltic paved shoulders are damaged.

The new emergency runway will provide sufficient strength to meet the designated role of the airfield in accordance with the aircrafts that will deploy to this airbase. The new runway will be rigid construction and the width of the new runway will be 22.5 meters as specified in ref (a) document, paragraph 2. The length of the new emergency runway will be same as previous one, which is 3413 m. Shoulders shall be 3 meters wide light asphaltic pavement. The rest of the shoulders will be graded according to drainage requirements.

2. PARALLEL TAXIWAY : The 15 m wide parallel taxiway was constructed in 1967. There is no subsurface drainage system. The base course gradation has been ruined due to existence of silt and clay materials’ capillarity effect. This case accelerated deterioration of the pavement. Consequently, all paved surfaces have been deformed.

3. A, B, C, D APRONS AND TAXIWAY : The existing A, B, C, D Apron Pavements were built in 1967 with rigid pavement. There is no subsurface drainage system under existing A, B, C and D apron pavements. The base course gradation has been ruined due to existence of silt and clay materials’ capillarity effect. This situation has accelerated pavement deformation. All asphalt paved shoulders have been deformed.

4. AIRFIELD LIGHTING : During the structural strengthening works of the new Emergency Runway, the existing emergency runway edge lighting system consisting mostly elevated runway edge lights, light bases, isolation transformers and 5000V series cable will have to be removed. Additionally, existing Approach Lighting Systems, Barrette type on the East end and Calvert type on the West end will be removed to avoid operational handicaps.

Besides, existing emergency runway edge lights, isolation transformers, 5000V series cable, constant current regulators (CCR) located at regulator vault and all other accessories have served their economical lives and further maintenance efforts will not be cost effective.

Therefore, new emergency runway lighting system will be renewed with new taxiway edge lights, isolation transformers, 5000V series cable, CCR located at regulator vault and all other accessories in conformance with STANAG 3316 requirements.