just official use, first official use of the waders
don't come here to expect them to go inside unless you're extremely prepared
well we're going in again, holes in the middle
the oxygen level outside at
zero to 100 meters above sea level should be 20.9 and the oxygen reading right now is...
what we're going down there no surely not
went over the third collapse and started hyperventilating
right so you've seen the title of the video um and yes you do indeed join us on our search for
two tunnels now because you lot are lovely people you often concern yourselves over our um health in
terms of when we go inside these old tunnels today we're in search of the grinkle mines the green
called tram road which went down to port mulgrave on the coast just over there north east coast of
england in north east yorkshire and we're going to have a look for um one of the most dangerous tram
road tunnels stood in existence today uh based on its um oxygen levels that sort of thing so we've
got a lot of safety going on we've also managed to knit one of these and we'll come to that in
a short while but for the meantime you join us on the search for the first of the two tunnels
problem number one of the day is this is the pathway this is the public footpath
down the bottom of the hill which we want to go i'm now waist deep in brambles literally thick
brambles we have to turn back and either go that well that way or try and find another way downhill
so hoping pathway number two attempt number two to get to the southern entrance of ridgelane tunnel
will be a little bit more successful we're quite away from the tunnel now whereas we were
just above it bit frustrating um so this tramway started his life as just a port and just a mine
down by the coast at port molgrave um 1850 1854 they built a iron stone mine into the cliff face
so if you can imagine there's a little harbor and they built a mine into the face we'll show
you that a bit because that's part of the second tunnel um then as things became depleted ironstone
became depleted they decided to mine inland a grinkel mine which i think they started 1870ish
to do that they needed to build two tunnels to get to the mine um the first of which was closest to
green combine that's 400 yards long straight line we should be able to see inside and get inside it
the second of which is almost a mile long so a mile long tram road with the junction inside it
built quite late in terms of tunneling so 18 70s 1875 maybe but nevertheless
um this is the one which has caused people problems um in modern times in looking for it
uh we shall come to those reasons shortly two different reasons why
it's considered now deadly and why we may well need one of these
there's an old tunnel there which is the ridge lane tunnel back this way beyond
down there on the embankment um takes us to port molgrove and the port mall grove tunnel
i'm just going to tell you going in okay
right we're going in southern entrance helmet by looking at things i'm going to need the waders
okay first problem we've got is half a foot or a foot of water and how deep
the silt is but we'll give that a go and then it gets better and better from there onwards
fairly hard despite looking quite bodily
you've got what looks like an old sleeper um a couple of pins there
okay brick lined
on its roof and masonry halfway down the sides
that was really strange so where i'm stood now all very sort of hard almost cemented like the mud's
actually cemented and then you get bits like this ahead of us where you can see what looks
down there to be like sleepers but also a little bit deeper water so being very careful underfoot
okay so probably 100 yards in now and there is the second refuge
because this tunnel was probably built about 1874-ish my guess is they were obviously
very well versed in building tunnels this tunnel itself was probably built to a very good standard
in terms of safety although safety wasn't a big thing it still had very regular uh refuges
okay little gas experiment we're not quite halfway i'd say we're probably a third the way in
and i'm going to try a little gas meter and now i'm sure in here the air is completely fine but
we've got a five gas meter and i thought it'd be quite interesting to try it oxygen level outside
at zero to 100 meters above sea level should be 20.9 and the oxygen reading right now is 20.9
okay so i realized we don't want to be the other side of the tunnel
um so we're gonna head back out to the side that rebecca is working at um and we're gonna take our
gas meter and we're gonna head over to port mulgrave so great old ridgelane tunnel tick
um we're not going to go there so there's loads more culverts and bits and pieces the other side
mine working four o'clock in the afternoon we want to get over to the end of this line or the start
of this line at port mulgrave ridgeland tunnel tick really interesting we're gonna now head back
down the line itself towards the coast to the port molgrave site the harbour
really interesting stuff there but also we're gonna have a look at the deadly mine um ready
so we made it to port molgrave which i've been wanting to do for quite some time
having seen all these different reports on these tunnels and
uh bits and pieces so we're now clambering down the side of the cliff i read yesterday some
tripadvisor reports and there were people who were giving this random historic port two stars
my children didn't like it here it's like dude this is like a historic place you're not here
for your like four-year-old kid to enjoy it's not like an adventure park no it's a historic piece
of you know your local history and it's like two stars would not recommend so well you know
camera and steps probably not the best idea in the world probably not
um oh look at the little bench this is so cool
oh god we're going down there no surely not good dude but we've got all the equipment right that's
really steep and there's a lovely rope which i assume is fine and strong but that's like
i'm sure i read there was a step somewhere what's that okay i'm going that way let's go that way
no wonder that guy gave this two stars on his um trip advice
so there are two tunnels here that go into the hillside they are you enter them via
one portal now that one portal you go inside it you climb over what is already the first collapse
and then you have two more portals the portal on the left is a the original iron stone mine
built in probably 1850 1855 there abouts until um the iron stone became quite depleted here so
they built the second tunnel and they bought that immediately adjacent to the original mine tunnel
so you go inside the first portal and you have two tunnel entrances one of them is a mile long
tramway tunnel with track in and all sorts but it's incredibly dangerous because it does have
at least four or five collapses it also has a junction inside it and i think only one person
has ever got to that junction on account of the fact that it's extremely dangerous
because of the quality of air we'll come to the quality of air in a second
and right above us is the actual tunnel just up there
hopefully we can get to it this is probably the wrong way but you know
that is the only way down having a giggle
wow bad news yeah big time
someone i mean someone's tried to someone's trying to sort through that
last reports online but it wasn't locked so a little bit guide we brought oxygen in
through there so inside this tunnel there's two tunnels you can't see because you've got a clap
straight away beyond that you've got left hand tunnel uh which is now the old original mine
right hand tunnel which goes right the way up to where we were with the original turn
about a mile inland that's got collapses all the way along it
the reason why if you ever come here and you do get inside you need to be exceptionally careful
the reason why you need to do that is because of the low oxygen levels so somebody online who've
been chatting to went over the third collapse and started hyperventilating i realized the mistake
he'd made didn't take the right precautions admitted his mistake got out as quick as he can
somebody else said went in there after and found the oxygen levels were in single digit figures
so don't come here to expect them to go inside unless you're extremely prepared
we've got everything we need in the bag we've got five gas detectors including obviously o2 um so
i don't want to sort of advertise this but people are going to come here because there's loads
of this online and we explore so i kind of feel we've got a responsibility to say don't come here
because it is genuinely deadly in terms of the collapse possibility the land slip possibility and
of course the air quality you don't know how bad the air is until it's too late literally too late
a little bit disappointed we were prepared helmet waders air quality meter free torches
and we couldn't get in the tunnel we wanted it was incredibly difficult to get to halfway up that
cliff side um i mean yeah we were going to try and sort of get in and do a bit of you know monitor
of the of the gas levels and the end of us um but we can't which is kind of disappointing but
also pleasing that they have actually locked it and bolted it shut um so yeah we're going
to sort of highlight the dangers of going in some of these places um not that we're experts
but we're sort of learning enough to know that there are there can be danger yeah these sort of
things so the first tunnel was great because we realized actually air quality for a normal turn
like that is absolutely fine we know that one's got lots of collapses and it's not bricklined
until you get quite far in so there's all sorts of reasons why the gas in the air isn't good in there
um yeah probably quite possibly one of the most dangerous tunnels that we haven't gone into
there we go right hope you enjoyed a little explore we've done today
um from the north east coast of um north east yorkshire
obviously
you