This thesis pertains to the influence of underground technical infrastructure during the construction phase on the selected components of the natural environment. The subject of research is the DN1000 MOP 8.4 MPa high pressure gas transmission system, realized in Poland from ZZU Wierzchowice till Kiełczów node. Studies identified the impacts on particular components of the environment, including land surface, plants, animals, biodiversity, air, water resources and quality, landscape and acoustic climate. An assessment was made on the impact, scale, frequency, duration or the influence type in the two stages of the investment process. It was found that the stage of DN1000 gas pipelines caused a significant change in the prevailing balance of the natural environment in the assembly area mainly due to soil transformation and vegetation removal as assessed as long-term. The impact on other components analysed in terms of frequency is usually medium-term or short-term, and in terms of duration – momentary. During the operation of the gas pipeline, the negative impact of the network was strongly determined in relation to the forested areas and forests, where the negative impact was recorded not only during the implementation of the network but also in the phase of its use.