| Central Chilterns Community Forum Area - Current estimates on construction compound details | ||||||
| All details on this document are assumptions based on current design work and are subject to change as design develops. | ||||||
| Worksite Location | Structure/HS2 Chainage | Servicing | Operation | Period of Operation | Staff numbers | Construction access route to worksite |
| A413 | Vent
Shaft 43+000 |
Little Missenden Vent Shaft | Secondary | app 6 - 9 months | Circa 50 | A413 |
| Chiltern Tunnel North Portal | Tunnel
Portal 44+700 |
Chiltern Tunnel, | Secondary | app 6 - 9 months | Circa 100 | Upgraded access (via Hyde Heath Rd) |
| South Heath Green Tunnel | Green
Tunnel 46+400 |
Hyde
Lane, Chesham Lane ATS South Heath Green Tunnel, Chesham Road, Kings Lane, Frith Hill |
Secondary | app 5 - 5.5 years (single face working), 2.5 - 2.75 years (double face working) | Circa 50 | B485 Chesham Road |
| South Heath Green Tunnel | Green
Tunnel 47+400 |
South Heath Green Tunnel | Secondary | app 5 - 5.5 years (single face working), 2.5 - 2.75 years (double face working) | Circa 50 | Frith Hill |
| Leather Lane | Overbridge 48+700 |
Leather Lane Overbridge | Secondary | app 1.5 - 2 years | Circa 50 | Leather Lane (Kings Lane) |
| HS2 Ltd - November '12 | ||||||