I'm sorry if my explanation of the unwanted official usage of "no fewer than" wasn't necessary for you, but I had to study it for quite a while before I grasped the difference!

Unfortunately a phrase like "creid é nó ná creid" would be too informal here I think. To keep the tone of the article, I would need something of a higher register.

Déarfainn - 19 damba ar a laghad

Séamus

A oiread agus 19 / As many as 19

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Táim ag foghlaim fós. Fáilte roimh gach aon cheartúchán.

I'm not really sure but if I imagine myself needing to say this in conversation I think it would look something like this:

... ach 's é an plean atá ann le gairid atá ag cur imní an domhain ar lucht éiceolaíochta - tá 19 damba le tógáil ar an abhainn, agus ní lú ná sin.

Honestly though, am not too sure about the last part.

Slán,

Domhnall

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Ultach mé agus Gaeilg Uladh a labhraim go measardha maith!

Ní lú ná... Is what I have seen as well.

Mise freisin.

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It is recommended that you always wait for three to agree on a translation.
I speak Connemara Irish, and my input will often reflect that.
I will do an mp3 file on request for short translations.
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Ar a luíghead (my spelling of ar a laghad to show Munster pronunciation) is what most people are suggesting here. What about: an chuid ba lú dhe?

Tá, an chuid ba lú dhe, 19 dambaí le tógáilt ar an abhainn

These versions suffer from the drawback that they mean "at least" or "at the least" - whereas the English doesn't mean "at least", but rather "precisely 19, which is a very high number". "No less than" indicates you think the number is outrageously high.

That's why I prefer Mick's version with oiread, possibly padded out to emphasise the outrageous nature of the number:

'Sé rud atá idir lámhaibh acu ná oiread agus a 19 de dhambaíbh a thógáilt ar an abhainn

... a oiread agus 19 damba a thóigeáil ar an sruth mór/an abhainn féin ...

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WARNING: Intermediate speaker - await further opinions, corrections and adjustments before acting on my advice.
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), agus Gaeilge an Chaighdeáin Oifigiúil (CO).

Táim ag teacht le Patrickj anseo - go gciallaíonn an Béarla gur 19 atá i gceist agus gur uafásach an méid é sin.

Measaim féin gurb é an leagan 'a oiread agus' an moladh is fearr atá léite agam.
Ba mhaith liom moladh eile a chaitheamh i bhur dtreo muna miste libh (blas áirithe de leagan Phatrickj air, gabh mo leithscéal a Phatrick!):

Ach is é an plean is déanaí atá beartaithe – a leithéid agus naoi gcinn déag de dhambaí a thógáil ar an bpríomhabhainn, chomh maith leis na dosaenacha eile ar a fo-aibhneacha – a chuireann scanradh ar éiceolaithe.

Seachnaígí le bhur dtoil! Ní cainteoir ó dhúchas mé ná baol air, ach duine a d'fhoghlaim agus atá fós ag foghlaim.