The Blue Line includes 18 underground stations, nine access shafts, over 20km of twin-bore tunnel and a maintenance depot. Stations include extensive retail capability as well as passenger facilities.

The depot also includes a substantial underground car park as part of a park and ride scheme.

scope

	Design of tunnel, station and maintenance depot building services.
	Halcrow provided building services design input to the production of tender schemes by a consortium of Japanese contractors.
	Three separate commissions were undertaken, involving extensive client liaison to work with an evolving brief and a short programme.
	All building services were designed to provide technical tender documents and included a fully itemised bill of quantities.

associated firms

	BnSE
	Mirae

key factors

	Due diligence review of concession agreement, construction, operation and maintenance costs and predicted revenues over the full concession period.
	International investment-grade review of the key factors ensuring investors' or financiers' confidence.

benefit to client

	tunnel ventilation scheme developed
	compliant to US safety standards
	production of bills of quantities
	all stations air conditioned
	secure power supplies for operator's technical installation