Chalfont St Giles vent shaft

There will be four ventilation shafts and one intervention shaft in the tunnel across the Chilterns. These would also be used for emergency access during operation. All the ventilation shafts use the same diaphragm wall construction method. The second of these will be in Bottom House Farm Lane, Chalfont St Giles which will be closed to through traffic for approximately two years. The shaft depth here is 32 metres. The tunnel boring machines will reach here in August 2022. The vent shaft is due to be completed by January 2025. The site will also house an auto-transformer station. To protect water supplies a pipeline has been built between the Affinity Water pumping stations at Chalfont St Giles and Amersham. The approved access route is via a temporary haul road to the A413 then to the A40 and the M40. All HGVs will turn right when leaving the haul road. The junction will be controlled by temporary traffic lights.

Chalfont St Giles vent shaft looking north across Bottom House Farm Lane – Apr. 2022 (04_552)
Chalfont St Giles vent shaft looking north – Apr. 2022 (04_551)
Chalfont St Giles vent shaft looking north – May 2016 (04_550)
Haul road looking west past Upper Bottom House Farm – Jul. 2021 (04_549)
Bottom House Farm Lane looking west – Nov. 2021 (04_548)
Bottom House Farm Lane looking west – Nov. 2021 (04_547)
River Misbourne looking south – Nov. 2021 (04_546)
Bottom House Farm Lane looking west – Nov. 2021 (04_545)
Bottom House Farm Lane looking east – Nov. 2021 (04_544)
Bottom House Farm Lane looking east – Nov. 2021 (04_543)
Bottom House Farm Lane looking east – Nov. 2021 (04_542)
Bottom House Farm Lane looking east – Nov. 2021 (04_541)
Bottom House Farm Lane looking east – Nov. 2021 (04_540)
Bottom House Farm Lane looking west – Nov. 2021 (04_539)
Bottom House Farm Lane looking east – Nov. 2021 (04_538)
Bottom House Farm Lane looking east – Nov. 2021 (04_537)
Bottom House Farm Lane looking west – Nov. 2021 (04_536)
Bottom House Farm Lane looking west – Nov. 2021 (04_535)
Bottom House Farm Lane looking east – Nov. 2021 (04_534)
Chalfont St Giles vent shaft looking north – Nov. 2021 (04_533)
Chalfont St Giles vent shaft looking north – Nov. 2021 (04_532)
Balancing pond looking east – Nov. 2021 (04_531)
Secant piling rig – Nov. 2021 (04_530)
Chalfont St Giles vent shaft looking west – Nov. 2021 (04_527)
Chalfont St Giles vent shaft looking north – Jun. 2021 (04_524)
Bottom House Farm Lane looking east – Oct. 2021 (04_523)
Bottom House Farm Lane looking west – Oct. 2021 (04_522)
Bottom House Farm Lane looking west – Oct. 2021 (04_521)
Bottom House Farm Lane looking west – Oct. 2021 (04_520)
Bottom House Farm Lane looking east – Oct. 2021 (04_519)
Bottom House Farm Lane – Oct. 2021 (04_518)
Bottom House Farm Lane looking west – Oct. 2021 (04_517)
Bottom House Farm Lane looking west – Oct. 2021 (04_516)
Bottom House Farm Lane looking east – Oct. 2021 (04_515)
Bottom House Farm Lane looking west – Oct. 2021 (04_514)
Bottom House Farm Lane looking east – Oct. 2021 (04_513)
Bottom House Farm Lane looking west – Oct. 2021 (04_512)
Chalfont St Giles vent shaft looking north – Sep. 2021 (04_507)
Looking north towards Chalfont St Giles vent shaft – Sep. 2021 (04_506)
Chalfont St Giles vent shaft excavation – Sep 2021 (04_505)
Chalfont St Giles vent shaft looking west – Jul. 2021 (04_500)
Chalfont St Giles vent shaft looking west – Jul. 2021 (04_499)
Chalfont St Giles vent shaft looking north – Jun. 2021 (04_495)
Chalfont St Giles vent shaft looking north – Jun. 2021 (04_494)
Bottom House Farm Lane looking east – Jun. 2021 (04_492)
Bottom House Farm Lane looking west – Jun. 2021 (04_491)
Misbourne Bridge looking east – Jun. 2021 (04_490)
Bottom House Farm Lane looking east – Jun. 2021 (04_489)
Chalfont St Giles vent shaft looking west – Apr. 2021 (04_482)
Bottom House Farm Lane widening west – Apr. 2021 (04_476)
Bottom House Farm Lane widening looking west – Apr. 2021 (04_475)
Looking east from the South Bucks Way – Apr. 2021 (04_470)
Bottom House Farm Lane looking east – Apr. 2021 (04_469)
Bottom House Farm Lane looking east – Apr. 2021 (04_468)
Bottom House Farm Lane looking east – Apr. 2021 (04_467)
Bottom House Farm Lane looking east – Apr. 2021 (04_466)
Bottom House Farm Lane looking east – Apr. 2021 (04_465)
Bottom House Farm Lane looking east – Apr. 2021 (04_464)
Bottom House Farm Lane looking west – Apr. 2021 (04_463)
Bottom House Farm Lane looking east towards the A413 – Apr. 2021 (04_462)
Bottom House Farm Lane looking east towards the A413 – Apr. 2021 (04_461)
Chalfont St Giles vent shaft looking north – Apr. 2021 (04_456)
Chalfont St Giles vent shaft looking north – Apr. 2021 (04_455)
Chalfont St Giles vent shaft looking north – Apr. 2021 (04_454)
Chalfont St Giles vent shaft looking north – Apr. 2021 (04_453)
Haul road looking west – Apr. 2021 (04_452)
Bottom House Farm Lane looking west – Apr. 2021 (04_451)
Chalfont St Giles vent shaft looking north – Apr. 2021 (04_450)
Bottom House Farm Lane looking west – Mar. 2021 (04_442)
Bottom House Farm Lane looking west – Mar. 2021 (04_441)
Bottom House Farm Lane looking east – Mar. 2021 (04_440)
Bottom House Farm Lane looking east – Mar. 2021 (04_439)
Bottom House Farm Lane looking east – Mar. 2021 (04_438)
Bottom House Farm Lane looking west – Mar. 2021 (04_437)
Bottom House Farm Lane looking east – Mar. 2021 (04_436)
Bottom House Farm Lane looking west – Mar. 2021 (04_435)
Bottom House Farm Lane looking east – Mar. 2021 (04_434)
A413 looking south – Mar. 2021 (04_433)
Chalfont St Giles vent shaft looking north – Mar. 2021 (04_426)
Chalfont St Giles vent shaft looking north – Mar. 2021 (04_425)
Haul road looking east – Mar. 2021 (04_424)
Bottom House Farm Lane drainage installation – Mar. 2021 (04_421)
Bottom House Lane looking east – Mar. 2021 (04_420)
Bottom House Farm Lane looking west – Mar. 2021 (04_414)
Bottom House Farm Lane looking west – Mar. 2021 (04_413)
Bottom House Farm Lane looking east – Mar. 2021 (04_412)
Bottom House Farm Lane looking west – Mar. 2021 (04_411)
Bottom House Farm Lane looking east – Mar. 2021 (04_410)
Bottom House Farm Lane looking east – Mar. 2021 (04_409)
Bottom House Farm Lane looking east – Mar. 2021 (04_408)
Bottom House Farm Lane looking east – Mar. 2021 (04_407)
Bottom House Farm Lane looking east – Mar. 2021 (04_406)
Bottom House Farm Lane looking east – Mar. 2021 (04_405)
A413 looking south -Mar. 2021 (04_404)
Bottom House Farm Lane looking west – Feb. 2021 (04_398)
Bottom House Farm Lane looking east – Feb. 2021 (04_397)
South Bucks Way looking east – Feb. 2021 (04_396)
Bottom House Farm Lane looking east – Feb. 2021 (04_395)
Misbourne Bridge looking south – Feb. 2021 (04_391)
Bottom House Farm Lane looking east – Feb. 2021 (04_389)
Bottom House Farm Lane looking east – Feb. 2021 (04_388)
Bottom House Farm Lane looking east – Dec. 2020 (04_379)
Bottom House Farm Lane looking east – Dec. 2020 (04_378)
Haul road looking west – Dec. 2020 (04_377)
South Bucks Way looking south towards the haul road – Dec. 2020 (04_375)
Link from Bottom House Farm Lane to the haul road looking east – Dec. 2020 (04_374)
Chalfont St Giles vent shaft looking north – Dec. 2020 (04_361)
Contractor’s (Align) welfare unit – Dec. 2020 (04_360)
Haul road looking west – Dec. 2020 (04_359)
Bottom House Farm Lane – diversion of electricity supple underground – Dec. 2020 (04_358)
Looking north across the Chalfont St Giles vent shaft – Dec. 2020 (04_346)
Looking west across Chalfont St Giles vent shaft – Dec. 2020 (04_345)
Chalfont St Giles vent shaft looking east across the re-located welfare unit foundations – Dec. 2020 (04_344)
Chalfont St Giles vent shaft looking west across the re-located welfare unit foundations – Dec. 2020 (04_343)
Looking north towards the Chalfont St Giles vent shaft – Dec. 2020 (04_342)
Bottom House Farm Lane looking west towards the link to the haul road – Dec. 2020 (04_336)
Upper Bottom House Farmer’s driven to protesting – Nov. 2020 (04_331)
Haul road blockage looking west – Nov. 2020 (04_330)
Haul road blockage looking east – Nov. 2020 (04_329)
Haul road blockage looking east – Nov. 2020 (04_328)
Removal of haul road obstruction, Bottom House Farm Lane looking west – Nov. 2020 (04_327)
Haul road looking east – Nov. 2020 (04_326)
Bottom House Farm Lane looking west – Nov. 2020 (04_325)
Bottom House Farm Lane looking east – Nov. 2020 (04_324)
Haul road looking west – Nov. 2020 (04_323)
Haul road looking east – Nov. 2020 (04_322)
Bottom House Farm Lane looking west – Nov. 2020 (04_321)
Bottom House Farm Lane looking west towards the existing bridge over the Misbourne – Nov. 2020 (04_317)
Chalfont St Giles vent shaft looking north – Nov. 2020 (04_316)
Chalfont St Giles vent shaft looking north – Nov. 2020 (04_315)
Chalfont St Giles vent shaft looking north – Nov. 2020 (04_314)
Chalfont St Giles vent shaft entrance looking north from the haul road – Nov. 2020 (04_313)
Bottom House Farm Lane showing the link to the haul road looking east (04_312)
Chalfont St Giles vent shaft looking east – Nov. 2020 (04_302)
Chalfont St Giles vent shaft looking north – Nov. 2020 (04_301)
Chalfont St Giles vent shaft entrance – Nov. 2020 (04_300)
Bottom House Farm Lane looking east – Nov. 2020 (04_296)
Bottom House Farm Lane looking east – Nov. 2020 (04_293)
Chalfont St Giles vent shaft looking north – Nov. 2020 (04_286)
Chalfont St Giles vent shaft looking north west – Nov. 2020 (04_284)
Chalfont St Giles vent shaft entrance looking east – Nov. 2020 (04_283)
Bottom House Farm Lane looking east – Nov. 2020 (04_282)
Chalfont St Giles vent shaft entrance looking north – Nov. 2020 (04_281)
Haul road looking east – Nov. 2020 (04_280)
Haul road looking west – Nov. 2020 (04_279)
Haul road looking east – Nov. 2020 (04_278)
Bottom House Farm Lane looking east – Nov. 2020 (04_277)
Haul road looking east – Nov. 2020 (04_275)
Misbourne Bridge looking south – Oct. 2020 (04_274)
Bottom House Farm Lane looking east – Oct. 2020 (04_271)
A413 junction with Bottom House Farm Lane looking south – Oct. 2020 (04_269)
A413 looking south – Nov. 2020 (04_268)
Junction of Bottom House Farm Lane & A413 looking north – Nov. 2020 (04_265)
Chalfont St Giles vent shaft looking east – Oct. 2020 (04_ 261)
Chalfont St Giles vent shaft looking north – Oct. 2020 (04_260)
Chalfont St Giles vent shaft looking north – Oct. 2020 (04_259)
Bottom House Farm Lane looking east – Oct. 2020 (04_258)
Bottom House Farm Lane looking west – Oct. 2020 (04_257)
Bottom House Farm Lane looking east – Oct. 2020 (04_251)
A413 looking south – Oct. 2020 (04_243)
Bottom House Farm Lane looking west – Oct. 2020 (04_242)
Bottom House Farm Lane looking north – Oct. 2020 (04_241)
Chalfont St Giles vent shaft looking north – Oct. 2020 (04_240)
Bottom House Farm Lane looking east – Oct. 2020 (04_239)
Bottom House Farm Lane looking west – Oct. 2020 (04_238)
River Misbourne looking south – Oct. 2020 (04_229)
Bottom House Farm Lane looking east – Oct. 2020 (04_227)
Bottom House Farm Lane closure – Sep. 2020 (04_220)
Bottom House Farm Lane looking east – Sep. 2020 (04_219)
Bottom House Farm Lane looking east – Sep. 2020 (04_218)
Haul road looking north – Sep. 2020 (04_216)
Bottom House Farm Lane and haul road looking west – Sep. 2020 (04_215)
Haul road looking east – Sep. 2020 (04_212)
Bottom House Farm Lane looking east – Sep. 2020 (04_211)
Haul road looking east towards Misbourne Bridge – Sep. 2020 (04_210)
A413 looking south – Sep. 2020 (04_207)
Haul road looking west from A413 – Sep. 2020 (04_206)
A413 looking north – Sep. 2020 (04_205)
Bottom House Farm Lane looking west – Sep. 2020 (04_200)
Looking east along the haul road & Bottom House Farm Lane – Sep. 2020 (04_199)
Looking west along the haul road, Bottom House Farm Land & temp. access road – Sep. 2020 (04_197)
Looking west along the haul road & Bottom House Farm Lane – Sep. 2020 (04_196)
Haul road looking east – Sep. 2020 (04_195)
Bottom House Farm Lane looking west – Sep. 2020 (04_194)
Looking west across the former equestrian ménage – Sep. 2020 (04_193)
Haul Road looking east – Sep 2020 (04_191)
Looking north across the Chalfont St Giles vent shaft – Sep. 2020 (04_181)
Bottom House Farm Lane looking east towards temporary road – Sep. 2020 (04_180)
Bottom House Farm Lane looking east – Sep. 2020 (04_179)
Haul Road looking west – Sep. 2020 (04_175)
Haul road & Bottom House Farm Lane looking west – Sep. 2020 (04_173)
Haul road looking east – Sep. 2020 (04_172)
Haul road & Bottom House Farm Lane looking west – Sep. 2020 (04_171)
Long suffering farmers at Upper Bottom House Farm, Simon & Mikey Swerling – Sep. 2020 (04_170)
Looking east along haul road – Sep. 2020 (04_169)
Looking east along the haul road – Sep. 2020 (04_168)
Looking east along the haul road – Sep. 2020 (04_167)
Looking west along the haul road from the A413 – Sep. 2020 (04_165)
A413 looking west towards the haul road – Sep. 2020 (04_164)
A413 looking north towards Bottom House Farm Lane – Sep. 2020 (04_163)
Bottom House Farm Lane looking west – Aug. 2020 (04_152)
Bottom House Farm Lane looking east – Aug.-2020 (04_151)
Bottom House Farm Lane looking west – Aug. 2020 (04_148)
Haul road looking east – Aug. – 2020 (04_146)
Haul road looking east – Aug. 2020 (04_145)
Looking east across the Affinity Water pipeline – Aug. 2020 (04_142)
Haul road looking east – Aug. 2020 (04_141)
Bottom House Farm Lane looking east – Aug. 2020 (04_139)
Haul road looking west from the A413 – Aug. 2020 (04_138)
Haul road looking east – Aug. 2020 (04_135)
River Misbourne looking north – Aug. 2020 (04_131)
Affinity-Water pipeline looking east – Aug. 2020 (04_130)
Affinity Water pipeline looking north – Aug. 2020 (04_129)
Affinity Water pipeline – Aug. 2020 (04_128)
Chalfont St Giles vent shaft looking north – Jul. 2020 (04_125)
Hedge removal in Bottom House Farm Lane – Jul. 2020 (04_124)
Bottom House Farm Lane looking east – Jul. 2020 (04_123)
Bottom House Farm Lane looking east – Jul. 2020 (04_122)
Bottom House Farm Lane looking west – Jul. 2020 (04_121)
Dust suppression in Bottom House Farm Lane – Jul. 2020 (04_120)
Bottom House Farm Lane looking west – Jul. 2020 (04_119)
Bottom House Farm Lane looking east – Jul. 2020 (04_116)
Haul road looking west – Jul. 2020 (04_113)
Bottom House Farm Lane looking east – Jul. 2020 (04_112)
New Affinity Water pipeline looking north – Jul.-2020 (04_111)
River Misbourne looking south – Jul. 2020 (04_109)
Bottom House Farm Lane looking east – Jul. 2020 (04_103)
Upper Bottom House Farm – Jul. 2020 (04_102)
Bottom House Farm Lane looking east – Jul. 2020 (04_101)
Bottom House Farm Lane looking east – Jul. 2020 (04_100)
Bottom House Farm Lane looking east – Jul. 2020 (04_99)
Bottom House Farm Lane looking east – Jul. 2020 (04_98)
River Misbourne looking south – Jul. 2020 (04_97)
Bottom House Farm Lane looking east – Jul. 2020 (04_96)
Bottom House Farm Lane looking west – Jul. 2020 (04_95)
Bottom House Farm Lane looking east – Jun. 2020 (04_94)
Bottom House Farm Lane looking west – Jun. 2020 (04_93)
Bottom House Farm Lane looking west – Jun. 2020 (04_92)
Bottom House Farm Lane looking west – Jun. 2020 (04_91)
Bottom House Farm Lane looking west – Jun. 2020 (04_90)
Bottom House Farm Lane looking east – Jun. 2020 (04_89)
Haul Road looking west – Jun. 2020 (04_88)
Haul Road looking east – Jun. 2020 (04_87)
Bottom House Farm Lane looking west – Jun. 2020 (04_86)
Bottom House Farm Lane looking west – Jun. 2020 (04_85)
South Bucks Way looking north – Jun. 2020 (04_84)
River Misbourne looking south – Jun. 2020 (04_83)
Bottom House Farm Lane looking east – May 2020 (04_82)
Bottom House Farm Lane looking west – May 2020 (04_81)
Bottom House Farm Lane looking east – May 2020 (04_79)
Bottom House Farm Lane looking west – May 2020 (04_77)
Haul Road looking east – May 2020 (04_76)
Bottom House Farm Lane looking west – May 2020 (04_75)
Bottom House Farm Lane looking east – May 2020 (04_74)
Bottom House Farm Lane looking east – May 2020 (04_73)
Bottom House Farm Lane looking west – May 2020 (04_71)
Bottom House Farm Lane looking east – May 2020 (04_70)
Bottom House Farm Lane looking east – May 2020 (04_68)
Bottom House Farm Lane looking west – May 2020 (04_67)
Bottom House Farm Lane looking east – May 2020 (04_66)
Bottom House Farm Lane looking west – May 2020 (04_65)
Bottom House Farm Lane looking east – May 2020 (04_64)
Upper Bottom House Farm looking north – Mar. 2020 (04_61)
Bottom House Farm Lane looking east – Mar. 2020 (04_60)
Bottom House Farm Lane looking west – Mar. 2020 (04_59)
Haul Road looking north – Mar. 2020 (04_58)
Haul Road looking east – Mar. 2020 (04_57)
Haul Road looking west – Mar. 2020 (04_55)
Haul Road looking east – Mar. 2020 (04_54)
Bottom House Farm Lane haul road looking west – Mar. 2020 (04_53)
Haul Road looking west – Mar. 2020 (04_52)
Chalfont Valley Equestrian looking east – Mar. 2020 (04_51)
Chalfont Valley Equestrian looking west – Mar. 2020 (04_50)
Chalfont Valley – Equestrian looking east – Mar. 2020 (04_48)
Haul Road looking west – Mar. 2020 (04_47)
Haul Road looking east – Mar. 2020 (04_46)
Haul Road looking west – Mar. 2020 (04_45)
Haul Road looking west – Mar. 2020 (04_44)
Haul Road looking east – Mar. 2020 (04_43)
Haul Road looking west – Mar. 2020 (04_42)
South Bucks Way looking north – Mar. 2020 (04_41)
Haul Road looking east – Mar. 2020 (04_40)
Bottom House Farm Lane looking east – Mar. 2020 (04_39)
Bottom House Farm Lane looking west – Mar. 2020 (04_38)
Bottom House Farm Lane looking west – Mar (04_37)
Haul Road looking west – Mar. 2020 (04_36)
Haul Road looking west – Mar. 2020 (04_35)
Chalfont St Giles vent shaft looking north (04_34)
Bottom House Farm Lane looking east (04_33)
Chalfont St Giles vent shaft haul road looking west (04_32)
Bottom House Farm Lane looking west (04_31)
Bottom House Farm Lane looking west – Apr. 2019 (04_30)
A413 looking north – Mar. 2019 (04_29)
Bottom House Farm Lane looking east – Mar. 2019 (04_28)
River Misbourne looking south – Mar. 2019 (04_27)
Haul Road looking west – Aug. 2019 (04_26)
Bottom House Farm Lane looking west – Apr. 2016 (04_25)
Haul Road looking west – Mar. 2019 (04_24)
Haul Road looking east – Mar. 2019 (04_23)
Bottom House Farm Lane looking east – Mar. 2019 (04_22)
South Bucks Way looking north – Aug. 2019 (04_21)
Haul Road looking west – Aug. 2019 (04_20)
Bottom House Farm Lane looking west – Feb. 2016 (04_19)
Bottom House Farm Lane looking east – Mar. 2019 (04_18)
Haul Road looking east – Mar. 2019 (04_17)
Bottom House Farm Lane looking east – Mar. 2019 (04_16)
Haul Road looking east – Mar. 2019 (04_15)
Bottom House Farm Lane looking east – Mar. 2019 (04_14)
Haul Road looking west – Mar. 2019 (04_13)
Upper Bottom House Farm looking north – Feb. 2016 (04_12)
Bottom House Farm Lane looking west – Aug. 2019 (04_11)
Chalfont Valley Equestrian looking east – Aug. 2019 (04_10)
Looking west across the Chalfont St Giles vent shaft site towards Hobbs Hole – Feb. 2016 (04_553)
Looking east across the Chalfont St Giles vent shaft site – Feb. 2016 (04_552)
Looking east across the Chalfont St Giles vent shaft site – Feb. 2016 (04_551)
Chalfont St Giles vent shaft looking north – Aug. 2019 (04_06)
Haul Road looking west – Aug. 2019 (04_05)
Chalfont St Giles vent shaft looking north – Jun. 2019 (04_04)
Bottom House Farm Lane looking north – Jun. 2019 (04_03)
Bottom House Farm Lane looking east – Oct. 2019 (04_02)
Chalfont St Giles vent shaft looking south – Oct. 2019 (04_01)