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St Helena Airport development

13th February 2015

  

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Name and Location
St Helena Airport development.

Client
British government’s Department for International Development (DFID).

Project Description
St Helena Island is located about 1 900 km from Africa, measuring 16 km by 8 km, and is one of the world’s most remote locations, with Ascension Island more than 1 000 km away.

The project involves the construction of an airport on the island. It will feature a 1 950 m high-quality concrete runway, with taxiways and an apron to cater for aircraft up to the size of an Airbus A320 and a Boeing 737-800; a rockfill embankment of about eight-million cubic metres, through which a 750-m-long reinforced-concrete culvert will run; a 3 500 m2 airport terminal building and support infrastructure; air-traffic control systems; a bulk fuel installation for six-million litres of diesel and aviation fuel; a 14 km airport access road; and all related logistics.

The island’s only lifeline to the outside world has been the Royal Mail Ship, the RMS St Helena, which calls regularly at St Helena Island. As a community that has no internal resources or an industry to support its economy, the British government has been providing extensive financial support for the island.

The bulk of the capital is spent on maintaining and operating the RMS St Helena. It is hoped that the new airport will address some of the socioeconomic difficulties on the island, boost the prosperity of islanders through tourism and help stop the exodus of its inhabitants who are seeking work in Britain.

To assist in the completion of St Helena International Airport, Basil Read has chartered a massive Thai cargo vessel, the NP Glory 4 from NP Marine for 36 months to transport fuel, materials and plant to and from the island.

Value
The project, funded by the DFID, was valued at £250-million, but the total value of the St Helena Airport project for phases 1 and 2 has increased to about £265-million.

Duration
Once the projected construction of the first phase of the airport is completed in February 2016, the travel time from Cape Town to St Helena will be reduced from seven days, or 168 hours, to a mere five hours. After construction, the operations phase of the contract will continue in partnership with South Africa’s Lanseria Airport for a further ten years.

Latest Developments
Work has recently been conducted near Bradley’s Camp on St Helena to prepare for the installation of a key piece of navigation equipment, the Doppler Very High Frequency Omnidirectional Radio Range Measuring Equipment (DVOR). The site for the DVOR has been carefully planned, as Bradley’s has the best location from which to send and receive radio signals for airport purposes.

The DVOR is a flight navigation aid commonly installed at airports. It enables aircraft to determine their position and stay on course by receiving radio signals transmitted by a network of fixed ground radio beacons. It uses frequencies in the very high-frequency band. It is particularly suited to the St Helena topography as it offers improved performance at demanding locations, owing to its wide-aperture antenna system and the using the Doppler effect.

The DVOR will include a 30-m-diameter counterpoise, which will be installed on the recently completed raised platform near Bradley’s Camp.

Basil Read has subcontracted Thales to install the DVOR.

The close proximity of the DVOR to the habitat of the endemic mole spider has required that special protection measures be undertaken. This includes preconstruction monitoring of mole spider activity, fencing to restrict vehicular access to sensitive areas, as well as careful micrositing micrositing and construction of the DVOR and supporting platform to ensure that activities do not intrude or encroach on the spiders’ habitat.

Key Contracts and Suppliers
Basil Read (designer, builder and operator), Worley Parsons (lead design and landside designs), Virtual Consulting (airside designs), KMH Architects and LYT Architects (architects); Atkins and WSP (independent certifiers); PRDW (marine designs); Lanseria Airport International (operations); Thales (AGL, Navaids – DVOR); Southern African Institute for Environmental Assessment or SAIEA (environmental); Trotech (bulk fuel installation; BME (explosives); Ohorongo Cement (cement) and Babcock (supply and maintenance of Volvo construction equipment).

On Budget and on Time?
Too early to state.

Contact Details for Project Information
Basil Read project director Jimmy Johnston, tel +27 11 418 6325 or communications manager Jenny Smith, tel +27 11 418 6466.
Babcock, tel +27 11 230 7300.
DFID, tel +44 1355 84 3132, fax +44 1355 84 4099 or email enquiry@dfid.gov.uk.
Worley Parsons, tel +27 12 745 2000 or fax +27 12 745 2001.
Virtual Consulting, tel +27 12 452 0444 or fax +27 12 452 0583.
KMH Architects, tel +27 11 447 4190, fax +27 11 447 2712 or email arch@kmh.co.za.
LYT Architects, email info@lyt.co.za.
WSP, tel +27 11 361 1300.
PRDW, tel +27 21 418 3830, fax +27 21 418 3834 or email info@prdw.co.za.
Lanseria Airport International, tel +27 11 367 0300.
SAIEA, tel +27 21 789 0251 or fax +27 21 789 0257.
Trotech, tel +27 31 764 1573 or fax +27 31 764 3353.
Ohorongo Cement, tel +264 61 248 485 or fax +264 61 247 878.

Edited by Creamer Media Reporter

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