Chalfont St Peter 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 first of these is in Chesham Lane, Chalfont St Peter. The construction compound will be in place for seven years. Shaft depth is 63 metres. Tunnel boring machines reached here in March 2022. The access route to the compound is via a newly constructed temporary haul road directly to the A413 then to the A40 and the M40. All HGVs will turn left when leaving the haul road. The junction is controlled by temporary traffic lights.

PRoW (Public Right of Way) CSP 10 will be diverted east around the construction compound before joining the existing footpath CSP 9 south of The Brow for the duration of construction and then reinstated along its original alignment.

Chalfont St Peter vent shaft looking east – Apr. 2022 (03_133)
Chalfont St Peter vent shaft soon after the TBMs have passed below – Apr. 2022 (03_132)
Chalfont St Peter vent shaft looking east – Apr. 2016 (03_131)
Chalfont St Peter vent shaft looking east – Oct. 2020 (03_119)
Chalfont St Peter vent shaft looking west- Jun. 2020 Roger Allen (03_118)
Chesham Lane looking west – Mar. 2021 (03_117)
Chalfont St Peter vent shaft looking west – Mar. 2021 (03_116)
A413 junction with haul road looking north – Dec. 2020 (03_112)
Vent shaft diaphragm wall cutter – Oct. 2020 (03_109)
Chalfont St Peter vent shaft looking east – Oct. 2020 (03_105)
Chesham Lane looking east – Sep. 2020 (03_ 102)
Chesham Lane looking east – Sep. 2020 (03_101)
Chesham Lane west – Sep. 2020 (03_100)
PRoW CSP 10/1 looking east – Sep. 2020 (03_99)
PRoW CSP 10/1 looking north – Sep. 2020 (03_98)
PRoW CSP 10/1 looking west – Sep. 2020 (03_97)
PRoW CSP 10/1 – Aug. 2020 (03_94)
Chesham Lane looking west – Aug. 2020 (03_93)
Chalfont St Peter vent shaft – Aug. 2020 (03_92)
Chalfont St Peter vent shaft – Aug. 2020 (03_90)
PRoW CSP10 diversion looking east – Aug. 2020 (03_69)
Chalfont St Peter vent shaft – Aug. 2020 (03_68)
Chalfont St Peter vent shaft – Aug. 2020 (03_67)
Chalfont St Peter vent shaft – Aug. 2020 (03_66)
Chalfont St Peter vent shaft – Aug. 2020 (03_65)
Chalfont St Peter vent shaft – Jun. 2020 (03_45)
Haul road west from PRoW CSP 10/1 – May 2020 (03_35)
Haul road crossing PRoW CSP 10/1 looking west – May 2020 (03_34)
Haul road looking east from PRoW CSP 10/1 – May 2020 (03_33)
Haul road entering the vent shaft compound looking east – May 2020 (03_32)
Haul road entering the vent shaft compound looking west – May 2020 (03_31)
Chalfont St Peter vent shaft – May 2020 (03_30)
PRoW CSP 10/1 – May 2020 (03_29)
PRoW CSP 10/1 – May 2020 (03_28)
PRoW CSP 10/1 diversion looking east – May 2020 (03_27)
Chalfont St Peter vent shaft – May 2020 (03_26)
PRoW CSP 10/1 diversion looking east – May 2020 (03_25)
PRoW CSP 10/1 diversion looking east – May 2020 (03_24)
(40) PRoW CSP 10/1 diversion looking north – May 2020 (03_23)
(41) PRoW CSP 10/1 diversion looking north – May 2020 (03_22)
(42) PRoW CSP 10/1 diversion looking east – May 2020 (03_21)
PRoW CSP 10/1 diversion looking north – May 2020 (03_20)
PRoW CSP 10/1 diversion looking north – May 2020 (03_19)
PRoW CSP 10/1 diversion looking north – May 2020 (03_18)
PRoW CSP 9/3 looking north towards The Brow – May 2020 (03_17)
PRoW CSP 10/1 looking south – Mar. 2020 (03_16)
PRoW CSP10 looking north – Mar. 2020 (03_15)
PRoW CSP10 looking east – Mar. 2020 (03_14)
PRoW CSP10 looking west – Mar. 2020 (03_13)
Chesham Lane looking east – May 2019 (03_142)
Chesham Lane looking north – May 2019 (03_141)
Chesham Lane looking west – May 2019 (03_140)
Chesham Lane looking east – Mar. 2019 (03_139)
Chesham Lane looking east – Mar. 2019 (03_138)
Chesham Lane looking west – Apr. 2019 (03_137)
Ground investigations – Aug. 2012 (03_136)
Chesham Lane looking east – Apr. 2016 (03_135)
Chesham Lane looking west – Apr. 2016 (03_134)
Looking east across the vent shaft site – Apr. 2016 (03_133)
Looking east across the vent shaft site towards Chesham Lane – Apr. 2016 (03_132a)
Chalfont St Peter vent shaft looking east – Mar. 2019 (03_132)