Military Construction Appropriations for 2003

This project includes replacement of Portland cement concrete and base material on Taxiway B which will strengthen the pavement. Project also constructs new parking apron with a 305 mm stone base and 305 mm of Portland Cement Concrete, and compacted fill material. The parking apron will be 207.65 m by 115 m wide. Concrete will be recycled. All wiring, lights, pavement markers disturbed by this project will be replaced. Drainage will be a combination of sheet flow and drainage structures. TI. Requirement: 52,583 m2 0m2

Adequate: 0 m2

Substandard:

PROJECT:

The project will provide critical re-capitalization of deteriorated
Taxiway Bravo and will also relieve the Air Cargo and Air Passenger
Terminals of the parking congestion that exists on the south side of the
airfield. (Current mission)

REQUIREMENT:

Adequate runways, taxiway and parking apron pavements are required to
accommodate the mission of Naval Station Norfolk in maintaining 15
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squadrons, a Fleet Replacement Squadron (FRS) for C-12, air cargo and air passenger terminals. In addition, the airfield hosts a wide assortment of heavy transport aircraft. The increase in the numbers of large aircraft arriving at the Air Cargo and Air Passenger Terminals causes a parking congestion problem, resulting in the closure of two taxiways. The Mediterranean channel flights have changed from 727's to the larger, heavier L1011's. Channel flights from Keflavik and Roosevelt Roads are expected to change to the larger aircraft also. The additional parking apron will fill in a grass strip and will result in two rows of parking for these transient aircraft. The number of these aircraft have increased

by 580% in the last 5 years. The apron is based on a parking plan for the

south side of the airfield.

CURRENT SITUATION:

In general, these airfield pavements have deteriorated due to a combination of factors

pavement age, high usage (the repeated loading from aircraft having high tire pressures and from increased numbers of heavy transport aircraft), pavement subgrade failure due to overloading, and isolated locations of latent construction defects and damage from freeze/thaw cycles.

Deteriorating pavement surface conditions on the runway, taxiways, and aprons present a significant Foreign Object Damage (FOD) hazard to operating aircraft. Ingesting fragments of pavement or joint sealant can severely damage or destroy an aircraft engine, and FOD is a constant threat to the safety of aircraft, pilots, air crews and civilian populations. Numerous aircraft engines have been damaged due to taxiway/apron FOD damage. While the squadrons use sweeper trucks and conduct FOD walks daily in an effort to prevent FOD damage, aircraft operations accelerate the deterioration of the pavement. Maintenance costs for these pavements are expected to increase sharply unless required re-capitalization is performed. Records indicate that the station spent more than $2,500,000/year on FOD damage caused by pavement in 1997 and 1998. In 1999, the FOD damage caused by pavement exceeded $3,690,000.

A pavement survey found the following: The taxiway will not provide satisfactory support and will begin to generate FOD if not improved. Taxiway Bravo is an old World War II runway, which has experienced a heavy increase in large passenger and cargo aircraft. The taxiway is the main taxiway used by both the air passenger and cargo aircraft. In sections of Taxiway Bravo South, the pavement condition index value is predicted to be below 45 (criteria threshold for maintenance) by FY2002. The pavement is

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also structurally deficient to support day-to-day operations. Reconstruction and strengthening with Portland cement concrete is required.

The increase in the numbers of large aircraft arriving at the Air Cargo and Air Passenger Terminals has left a parking congestion problem, which causes the closure of two taxiways. The additional parking apron will fill in a grass strip and will result in two rows of parking for these transient aircraft.

IMPACT IF NOT PROVIDED:

Without this project, there will be repeated closures and delays caused by maintenance on the main taxiway. Foreign Object Damage (FOD) potential will increase, personnel safety will be increasingly jeopardized, and pavement areas may be required to be closed, which severely impacts airfield operations and emergency response times in the event of emergency landing. The increase in FOD will also require more FOD walks, and, consequently, less flying time. Air Passenger and Cargo Terminal operations are impacted when two taxiways must close to park all the transient aircraft. This additional parking will allow smooth operations and parking within Navy airfield criteria.

12. Supplemental Data:

A. Estimated Design Data: (Parametric estimates have been used to develop project costs. Project design conforms to Part II of Military Handbook 1190, Facility Planning and Design guide)