Both shafts will be lined with a watertight steel/concrete composite liner.

Source: https://investingnews.com/denison-reports-significant-increase-in-economic-results-for-wheeler-river/

Ex-Cabinet minister questions if Rwanda Bill is 'sufficiently watertight'

Source: https://www.telegraph.co.uk/politics/2023/12/12/rishi-sunak-latest-news-tories-labour-starmer-live/

Home Secretary James Cleverly is understood to be close to finalising a treaty with Rwanda as part of Rishi Sunak’s goal of making the plan legally watertight following the Supreme Court’s ruling against the scheme.

Source: https://www.barryanddistrictnews.co.uk/news/national/23965357.uk-government-considers-basing-lawyers-rwanda-part-asylum-deal/?ref=rss

If that’s our objective, we need to ensure sanctions on things like high-tech electronics are as watertight as possible.

Source: https://www.swissinfo.ch/eng/business/switzerland-has-to--go-above-and-beyond--to-implement-sanctions/48589210?utm_campaign=swi-rss&utm_source=multiple&utm_medium=rss&utm_content=o

It may now be possible for Mrs Braverman to revise the agreement with the Rwandan government – alleviating the judges' concerns by making the whole scheme 'watertight'.

Source: https://www.dailymail.co.uk/news/article-12246079/Court-Appeal-judges-rule-government-plan-send-asylum-seekers-Rwanda-unlawful.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

The cable runs through a long, narrow cable pipe, and gets looped into a watertight compartment containing the two large wheels that drive the ferry.

Source: https://www.cbc.ca/news/canada/new-brunswick/nb-ferry-schedule-times-1.6990528?cmp=rss

The first phase of construction is nearing completion with a 1300-tonne watertight cabin installed on the…

Source: https://www.newscientist.com/article/2405830-chinas-first-underwater-data-centre-is-being-installed/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home

We are in phase one which is to make the building wind and watertight and undertake essential stone works repairs, as well as the preservation of ornate stones and other original features such as the weathervanes, gutters, doors, railings, and gates.

Source: https://www.examinerlive.co.uk/news/west-yorkshire-news/council-gives-update-key-huddersfield-28072934