Construction hazards: first dust pollution, now landslides
By Aileen Qaiser
THE Kumhar Road landslide in Rawalpindi, highlighted in the press last week, is the most recent of a number of incidents lately in the twin cities that point to inadequacy in sound environmental management practices during construction. The result is these sites pose health and safety hazards to both workers and the public.
Earth-moving operations connected with construction work on the Sheikh Rashid or Leh Expressway had caused a retaining wall and a portion of Kumhar Road on the banks of the Nullah Leh to collapse about a month ago putting about a dozen houses on the opposite edge of the road at risk of collapse.
The gravity of the situation at this site was worsened recently by rains which caused landslides and eroded the road even further putting dozens of occupants in the affected houses at risk of death and injury should the houses collapse.
Although the Kumhar Road case has not claimed any life so far and the occupants have reportedly been evacuated, a dumper truck driver involved in efforts to stabilize the ground at the affected site and reconstruct the road was injured last week when his vehicle fell into Nullah Leh.
An earlier mudslide last month however at the underpass construction site at China Chowk in the Capital’s Blue Area had killed two labourers and injured two others.
Excavation work for the underpass and consequent erosion at the construction site due mainly to rains had not only caused the tragic accident, but like in the Kumhar Road case, also put several buildings in the vicinity of China Chowk, including the multi-storey Shaheed-i-Millat Secretariat, in danger of structural damage if not collapse.
Earlier in the middle of this year when the weather was dry, the earthworks, quarrying and demolition at various road construction sites were a major source of dust pollution in Islamabad.
It is not as though there is a shortage of guidelines on environmental management practices in Pakistan. For instance, the Guidelines for the Preparation and Review of Environmental Reports produced by the Pakistan Environmental Protection Agency (Pepa) in 1997 require that an environmental management plan (EMP) for any project provide a framework for sound management or mitigation of environmental impacts both during construction and later operation of the project.
Pepa in 1997 had also produced a series of reports entitled Sectoral Guidelines for Environmental Reports, in which it is maintained that construction is the time when impact on the environment is most severely felt and when the project site is particularly vulnerable to environmental disturbance or damage.
Out of five main environmental disturbances during the construction process outlined by Pepa, two are very much evident at the Kumhar Road and China Chowk construction sites. These are silt run off from construction operations, worsened by erosion during rains from unprotected excavated areas resulting in excessive soil erosion and possible damage to property; and dangers to workers and nearby residents from accidents, hazardous materials and emissions.
It is not always clear who is responsible when things go wrong in big construction projects like these. One thing however is definite: the soil slippage at both construction sites and the accident at the China Chowk site could have been prevented if mitigation or erosion control measures during the construction had been carefully planned and tied to monitoring and management plans.
The China Chowk construction site had also exhibited a third environmental disturbance outlined by Pepa, i.e., disruption of local traffic patterns, congestion and blocking of access to adjoining activities leading to accidents. This happened in March 2007 when an Indian national was killed in a traffic accident reportedly caused by the lack of installation of warning signs about the danger posed by the construction site to passing motorists and pedestrians.
Incidentally, Pepa’s guidelines also outline mitigation measures to control dust and odour generation and minimize their impact during construction. However, it is obvious from the severe dust pollution which enveloped several areas of Islamabad earlier during the drier months that these mitigation measures were not implemented at the road construction sites or if they were, had been inadequate.
Apart from the landslides at the Kumhar Road and China Chowk sites, two other incidents of structural collapse at construction sites in this part of the region have raised concerns about the general safety standards in our construction industry and the inadequate adoption of safety precautionary measures at these sites.
The most recent accident is the collapse of an under- construction building in Murree three weeks ago that killed at least two labourers and injured six others while they were removing the scaffolding supporting a newly laid floor of the building. In April 2003, the collapse of the under-construction Bano Arcade complex in Rawalpindi had killed two people and injured many others while a new floor was being added to the already constructed building.
Meanwhile, the collapse of completed structures like the multi-storey Margalla Tower apartment block in Islamabad during the October 2005 earthquake and a seven-storey apartment building in Murree in August 2006 that was scheduled for demolition after suffering structural damage in the October 2005 earthquake, has drawn attention not only to the construction quality and safety standards of many of our buildings but also to the viability of their design.
The fact that several other multi-storey buildings in Murree have been built in apparent violation of regulations and rules, as was reported in an English daily last week, ought to be a major cause of concern. Some of these buildings, precariously perched on hill slopes, pose grave danger to the public should they collapse during landslides in heavy rain or earthquake.
The standard of quality in our construction is most evident in the many roads built recently in the twin cities. Almost every week, one newspaper or the other publishes a photograph or two of a portion of a newly built road that has become potholed and broken after a little bit of rain. Last week, photographs were published which showed the broken and damaged portions of two recently built roads, viz., 7th Avenue and a link road on 9th Avenue.
While broken roads can at most cause traffic accidents, the consequences of a broken bridge, as we have seen in the case of the Northern Bypass in Karachi, can be much more catastrophic.
If there is any lesson we can learn from the construction practices in the more developed countries, it is the intrinsic link between safety and quality. The practices leading to high quality work and results most often lend to safe working conditions and high quality work practices.
There is no doubt whatsoever that unregulated construction activity, as it is going on here, is dangerous. The right standards of safety therefore need to be established in our construction industry so that both workers and the affected public can be kept safe and healthy.


