Ojamon kalkkikivikaivos (Ojamo)
Mine diving in Finland · about 2 km from Lohja
- Max depth
- 160 m
- Trimix from
- 45 m
- Type
- Backmount
- Certification (estimate)
- Intro to cave
- DPV
- DPV-suitable
Former limestone mine of Lohjan Kalkkitehdas: open pit from 1925, underground from 1931–33, closed in 1965 (8.7 Mt of limestone); a POW labour camp in WWII.
More about Ojamon kalkkikivikaivos (Ojamo)
Signed-in divers also see:
- Whether this site fits everyone's certification, gas and gear
- Access, parking and the route from the road
- Exact map pin and navigation
- Depth profile and sumps
- Configuration advice
- Warnings with sources (4)
- DPV suitability
- Driving times from your stay and a plan with the AI instructor
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Current conditions
Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:
- Ojamon Kaivossukeltajat ↗
Association that has run diving at Ojamo since July 2024: membership, events and sign-up.
- Montolan Kaivossukeltajat ↗
Montola portal: events, rules, safety document and mine maps.
Plan a cave diving trip to Finland
Enter your team, with certifications, gas and configurations, and see right away which caves fit. With driving times from your stay, fill stations and an AI instructor who thinks along.
Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Sukeltaja-lehti 2025–2026, Montolan Kaivossukeltajat (rules, 2024 safety document), ojamodive.fi, City of Lohja, Yle 2026, MTV 2017, X-Ray Mag 2013, Divers of the Dark, Divers24, SLL Lohja, Sukeltajaliitto, Kuortane municipality, Divers B&B, Tyks, Tukes, Arctic Divers, Jyväskylän Delfiinit, Lohjalla tapahtuu, Wikipedia; Sept 2026). Pins from Montolan Kaivossukeltajat and the Sukeltajaliitto MML map link; Ojamo (approximate) and Kaatiala from wannadive. ~ = estimate. Rules change — check locally.