When caves collapse: people may be killed

On the 14 September the Planning Authority approved application PA3487/19 which proposed the   “stabilization of dangerous rock slope; repair to deteriorated concrete wall and construction of wave dissipation slope along the Qui Si Sana coastline”.

In simple language this involves a permit for remedial works after a cave along the Sliema Qui Si Sana coastline collapsed, thereby exposing the MIDI development works immediately behind the cave: the basement level of residential blocks T14 and T17.

We have been told that the cave collapsed as a result of erosion along the coastline. Some readers may tend to forget that way back in 2016, a Maltese geologist had sounded the alarm that a “high-rise had been constructed over a fractured and eroded sea cliff, which could collapse any time soon.” The collapse in fact occurred relatively quite soon, signifying that the geologist was pointing out the obvious which was being ignored or not given due consideration by the developer and his advisors.

The point to be made is why the Planning Authority permitted the development to take place so close to the coastline. As far as I am aware, the EIA relative to the Tigne Development by MIDI does not reveal any detailed studies on the condition of the coast as well as on the impacts of erosion on the Qui Si Sana coastline and its relevance to the development of the MIDI project. The issue is not just one of remedial works but on why the Planning Authority  ignored the state of the coast, as a result permitting development too close to the coastline for comfort. The collapse is adequate proof of all this. The Planning Authority has much to explain in this specific case. Its actions, or lack of them, should be investigated.

The issue is not one relative to the structural stability of the development but of the protection of the coastline.

Erosion as a result of natural elements occurs continuously. It is a natural ongoing phenomenon.

In this respect it may be pertinent to draw attention to a report, authored by a team of geologists, dated October 2007 and entitled : “Report on Coastal Sliema. Geology, geomorphology, sites of scientific interest and coastal protection considerations.” This report was commissioned by the Sliema Local Council.

The 50-page report, which makes interesting reading, emphasises that a number of sites along the Sliema coast “are undergoing rapid coastal erosion that will increase with climate change, resulting in instability or failure in coastal infrastructure.”

Of particular interest is that the report, authored in 2007, goes on to state that “The faulted coast along Għar id-Dud is retreating rapidly by dislodgement of boulders along joints and faults. Public structures that may be affected include Tower Road promenade. The Għar id-Dud cave may also partially or totally collapse, leading to the caving-in of the overlying pedestrian promenade. If collapse is sudden and during daytime/early night time, injury and loss of lives may result.”

I have personally drawn attention of the Transport Minister to the above some time ago, however to date I am not aware that any action has been taken.

The matter was already very worrying way back in 2007 and most probably it is even worse now, after thirteen years, given that no coastal protection works have been taken in hand in the area in the intervening period.

The Għar id-Dud cave is the result of natural erosion and collapse accelerated by wave action. This is a natural process that cannot be halted unless adequate coastal protection works are initiated. If nature is left on its own, the end result is quite predictable: a complete collapse of Għar id-Dud, a caving in of the overlying pedestrian promenade and a number of dead or injured pedestrians, depending on the time of day when a collapse possibly occurs.

Will Transport Malta and the other authorities wake up from their slumber and act immediately please?

published in The Malta Independent on Sunday: 27 September 2020

Gozo Channel: tunnelling discounts

 

When the current Gozo Channel tunnel debate was initiated around five years ago, the then Minister Chris Said went on record to emphasise that the proposed tunnel, to be bored under the seabed would cost approximately €150 million. This estimate has now been upped to €300 million.

This is one of the basic assumptions underlying the study commissioned by Transport Malta, together with the Gozo Business Chamber, and carried out by E Cubed Consultants Ltd, commonly referred to as the “economic and financial feasibility study”.

The study makes interesting reading as it considers the economics of the so-called permanent link between the islands of Gozo and Malta. I respectfully submit that the conclusions of this study are as valid as the basic assumptions which underpin it.

I draw the attention of readers to the fact that proposals for various tunnels are currently under consideration in other countries.

The first is the proposed Trans-Pennine tunnel, intended to improve the transport links between Sheffield and Manchester in the UK. The ambitious 18- mile (29km) tunnel would be built under the A628 Woodhead Pass. After having established that the geology of the Pennines was suitable for such a project, it was estimated that the approximate cost would be a staggering £6 billion (€8.40 billion).

The second UK project is the much-debated and controversial tunnel at Stonehenge. Intended to upgrade the A303 road, it is projected to have a length of 1.8 miles (2.9 km) and is currently estimated to cost £490 million (€700 million).

Another projected tunnel, recently given the green light, will pass between the Danish island of Lolland and the German island of Fehmarn. Construction work on this 19 km tunnel should start next January and it is estimated to cost €8.7 billion.

The estimates for the proposed tunnels in the United Kingdom indicate that the cost of a 10 km tunnel would exceed the €2 billion mark, even before taking into account the fact that excavating below the seabed would cost substantially more. In addition, the Danish/German tunnel indicates a pro-rata cost of €4.7 billion for a 10 kilometre tunnel.

In addition, the geological parameters below the Gozo Channel are still largely unknown: geological studies have to be carried out and examined in detail in order to establish the facts. Without these facts, the basic information necessary to take essential design decisions is still unavailable. What is known is worrying enough: the presence of active geological faults running right through the proposed route of the tunnel.

The study’s conclusions – that the proposed tunnel is economically viable – have  been reached prior to the carrying out of geological studies. Even the estimated costs used in the economic viability study have been established before these essential geological studies.

In this type of project, no estimate of costs can be precise – especially if it is not based on adequate and essential information.

This indicates that the conclusion of the economic viability study was premature.

In addition to the geological studies, additional important (and essential) studies have (as far as is known) not yet been commissioned. These include studies on the environmental impact, business impact and social impact.

Once concluded, such studies will inevitably point to other issues that will require detailed consideration, including the extent to which the projected permanent link between Malta and Gozo will toll the death knell for holiday accommodation in Gozo: hotels, flats and farmhouses.

The above indicates that, unless the promoters of the tunnel have some cast-iron guarantee of substantial discounts on the costs, the proposal is a non-starter even before any consideration of the environmental, business and social impact. It is about time to begin serious work on the practical alternative: a fast ferry service between Gozo and the Grand Harbour.

published in The Malta Independent on Sunday : 6 December 2015

Tunnel vision

 

Gozo’s connectivity issues are considered as a problem when in reality they define Gozo and determine its distinct features. Unfortunately, in this respect both the government and the opposition have developed a tunnel vision, that is they tend to focus on just one view and ignore everything else.

The latest twist in the current debate is the declaration by the Finance Minister in his budget statement earlier this month that the feasibility study commissioned by Transport Malta, together with the Gozo Business Chamber has been concluded positively  and that the next step would be  the commissioning of a technical and geological study relative to the projected tunnel across the Gozo Channel.

Transport Malta, prodded by the Gozo Business Chamber, seems to be bent on putting the cart before the horse as it is inconceivable how a feasibility study could be concluded without first having identified all the geological issues and examined them in detail.  Knowing that the Gozo Channel contains a number of geological faults, including active ones, leads to the logical preliminary conclusion that geological studies of the area proposed to be tunnelled could have a substantial bearing on the technical parameters of the project. This would include the specific  route to be selected, the actual works to be carried out and the costings. The geological studies could also lead to a technical recommendation to select an alternative solution other than boring a tunnel below the seabed .

When the PN-led government placed the issue on the national agenda, former Minister Chris Said gave his guesstimate that the tunnel would cost in the region of €150 million. We have recently been informed that this guesstimate has increased substantially to between €250 and €300 million.

These guesstimates are on the low side, because when the geological issues have been examined the estimate could well shoot up to over €1 billion- this being around 4 times what has been taken into consideration in the so-called “feasibility study”.

These type of project very rarely follow estimated costs. The tunnel linking the Marsa and Delimara powers stations in Malta, for example, overshot its projected costs by around 100% due to the absence of adequate geological information. As a result, parts of the  tunnel caved in during works, necessitating substantial additional work, including redirecting parts of it. On the other hand,  expenditure on the Channel Tunnel linking Folkestone in Kent to Coquelles near Calais exceeded the projected estimates by around 80% notwithstanding the availability of detailed geological studies.

Last week, one of the Sunday newspapers referred to a survey carried out by the Gozo Tourism Association which indicates that 64% of tourism operators in Gozo are adamantly against the proposed tunnel because the direct result of this would be to render Gozo as an appendage of Malta. Gozo would be transformed into a one- day destination, just like most of the other tourism attractions spread over the Maltese islands.

Gozitan tourism operators have a very valid point, as the direct result of this tunnel vision is that Gozo would be transformed from an island into a remote village. Most hotels in Gozo as well as the flats and farmhouses available to let, could then require the identification of another use.

This matter has not yet been examined and yet it is fundamental to the decision-making process and should have been the first step in the whole exercise.

All this muddle and I have not yet commenced discussing the environmental impacts of the proposed tunnel!

The tunnel will generate large quantities of rock which require disposal. The precise amount would depend on the route to be followed (and consequently the length of the tunnel) as well as the selected design (the cross sectional area) and could be anything between one and two million cubic metres of fragmented rock.

In addition, the proposed point of entry of the tunnel at Iċ-Ċumnija on the outskirts of Mellieħa, would most probably be accessed through a new road network in the area immediately behind the Għadira Nature Reserve and bird sanctuary. This means that all the environmental issues which were discussed when the proposed TEN-T network was being debated will once more be of relevance.

There are many other ways through which Gozo’s connectivity issues can be addressed and there are certainly more cost effective ways than the proposed tunnel. The costs to be considered are not just financial: they include social and environmental costs, which should be considered on the drawing board and not as an afterthought.

This is the problem with the tunnel vision – you just have one view, excluding all the others.

Il-mina bejn Malta u Għawdex

 

Ma nafx jekk il-Ministru tal-Finanzi kienx jaf x’inhu jgħid meta qal li l-feasibility study “ikkummissjonat minn Transport Malta u l-Gozo Business Chamber” dwar il-mina bejn Malta u Għawdex kien lest. Imbagħad fis-sentenza ta’ wara jgħidilna li l-pass li jmiss issa huwa l-istudju tekniku u ġeoloġiku dwar il-mina.

Il-mistoqsija toħroġ waħedha: kif tista’ tagħmel feasibility study sura, jiġifieri studju dwar jekk jaqbilx li jsir il-proġett, meta għadek ma lestejtx l-iktar studju importanti: dak ġeoloġiku.

Dan ilu żmien jingħad minn kull min jaf l-affarijiet.

Jiena ktibt dwar dan kważi ħames snin ilu.

Iktar importanti milli ktibt jien, illum tkellem mat-Times il-ġeoloġista Peter Gatt. Tkellem ukoll mat-Times nhar it-3 ta’ Frar 2011.

Dr Peter Gatt jispjega fit-Times tal-lum għaliex qabel ma jsir l-istudju ġeoloġiku ma tista’ tikkonkludi xejn. Dan l-istudju hu “a vital first step”. Dan minħabba li l-istudju ġeoloġiku, jekk isir sewwa, jidentifika l-problemi ġeoloġiċi fuq ir-rotta li tkun ser titħaffer. Min-naħa l-oħra, jispjega Dr Gatt, jekk l-istudju ma jsirx, jew ma jsirx sewwa l-ispejjes tal-proġett jimmoltiplikaw. Kif ġara, jgħidilna Dr Gatt, fil-mina bejn Delimara u l-Marsa [bejn iż-żewġ power stations] li swiet id-doppju ta’ dak ippjanat minħabba li, billi ma kienx hemm informazzjoni ġeoloġika adegwata f’idejn min fassal il-proġett, kien hemm kollass tal-blat f’diversi partijiet tal-mina.

Dr Gatt isemmi l-eżempju tal-istudju ġeoloġiku li sar bi preparazzjoni għaċ-Channel Tunnel bejn l-Ingilterra u Franza. Dan l-istudju dam 50 sena biex sar u minkejja dan, l-ispiża taċ-Channel Tunnel xorta varjat bi 80% mill-istima oriġinali.

Meta wieħed iqis dan kollu ma nafx x’feasibility study sar!

Qalulna ukoll (mhux fil-baġit) li l-mina ser tiġi tiswa madwar €250 miljun. Meta tqis l-ispejjes li jistgħu jkunu meħtieġa minħabba l-kundizzjonijiet ġeoloġiċi taħt il-Fliegu bejn Malta u Għawdex, naħseb li din l-istima hi baxxa ħafna. Fil-fatt jiena fl-artiklu tiegħi tal-2011 kont għidt li probabbilment li l-ispiża tkun bejn €1 biljun u €1.5 biljun. Dan kont ibbażajtu fuq l-ispiża stmata għall-mina bejn il-gżira Daniża ta’ Lolland u l-gżira Ġermaniża ta’ Fehmarn li kienet qed tkun diskussa f’dak iż-żmien. Għalkemm dawn huma stimi imma xorta hemm diskrepanza kbira li mhiex ġustfikata.

Hemm dawn il-problemi kollha u għandna ma bdejniex nitkellmu dwar impatti ambjentali, li minnhom hemm bosta.

Il-mina, biex issir, ser tiġġenera kwantità kbira ta’ blat imqatta. Dan ivarja skond id-diżinn u jista’ jammonta sa żewġ miljun metri kubi ta’ blat. Hemm ukoll is-siti Natura 2000 li qegħdin viċin ħafna taż-żona fejn ser tiżbokka l-mina fl-inħawi taċ-Ċumnija limiti tal-Mellieħa.

Imma l-feasibility study lest, qalilna l-Ministru!