Underground - Deep Utilities
Within Underground - Deep Utilities, a large spectrum of client services are offered and are listed below:
Our work consists of a combination of public and private works. With our large crew capacity and equipment pool, we can offer our clients safe, timely, cost effective workmanship while providing the utmost customer service satisfaction.
Volker Stevin Contracting was contracted to install all of the necessary storm piping for the new runway expansion, which included:
A portion of the large diameter storm line included tunnelling of large diameter pipe for crossing of sensitive utility corridors due to jet fuel lines servicing the Airport and an active roadway that needed to remain open at all times. The project was done under strict project guidelines for Safety, Environment and included the development of project specific Quality Control Program.
This project required many different trades to occupy the space at the same time, for this, the utmost importance was placed on communication and planning to ensure all works were completed on time and safely. For Volker Stevin's portion, as well as self-performing on the installation of the deep utilities, several contractors were employed to complete the various scopes of our work including: Earthworks, Piling, Electrical, Mechanical, Tunnelling and Guard Rails.
Volker Stevin was contracted to install new storm lines, feedermain and asphalt carriage ways as part of the East Village development within the downtown core of Calgary.
The contract required heavy coordination with many stakeholders in an effort to keep everything moving, while limiting disruption to surrounding public businesses which included an operating night club directly adjacent to the work at depths of up to 10m. Work also required the realignment of an existing 900mm steel feedermain that needed to be installed to a new depth of 10m to accommodate the construction of a new underpass.
The work required bypassing an existing 1050mm RCP sanitary line that was running at approximately 70% capacity to facilitate the installation of a 900mm HDPE Storm Syphon. This was achieved by cutting the top of the existing sanitary, installing 2 10" pumps to divert the flow around the work are and plugging the line. Work was completed without incident.
Volker Stevin was contracted to install a new sanitary trunk line through a non-active landfill that was capped in the late 1940's. The work included the relocation of an existing water main, and construction of a new roadway, and concrete flatwork within the width of the Right of Way.
The contract was part of the expansion of the sanitary system for North Calgary, as well as future growth north of the city. The project involved heavy coordination with many stakeholders in an effort to keep everything moving, while limiting disruption to the Calgary Zoo.
The work through the landfill necessitated the development of a specific Health and Safety Plan to deal with the potential contaminants expected within the non-active landfill area. At all times during this phase of the owrk, the trench had active fans cicurlating air, with active and passive air quality monitoring taking place. All excavated material was hauled to the Shepard Landfill and was replaced with drianage gravel for the pipe zone and imported clay backfill. One fo the more interesting installation issues on site was that some zones would have the ipe sitting on top of garbage. As it would not be economically sound to excavate to competent base material, concrete slabs were built to increase the surface area and bridge the poor base. The slabs were instlaled below the pipe bedding and the pipe installed.
The sanitary lines installed for the project ranged from 1800mm to 2700mm RCP, installed to depths between 5 - 11m.
Volker Stevin was contracted to install a New Sanitary Trunk Line using both open-cut excavation and trenchless installation (Micro-Tunnelling). The work included the relocation of an existing water main, and construction of a new roadway, concrete flatwork, and installation of a new storm line for the width of the Right of Way.
Excavation depths for the open-cut portions of the project in live roadways ranged from 6 to 8.5m, next to an existing and active 1500mm RCP sanitary line.
Some the of the more technically challenging work involved the installation of two tenchless installations of 1650mm Reinforced Concrete Pipe; one crossing completed below McKnight Boulevard and one crossing below 32nd Avenue.
Upon completion of the underground work, the project indlued the construction of a new road way on 6th Street NE from north of McKnight Boulevard through to Laycock Park which is south of 64th Avenue.
Volker Stevin was contracted to construct utilities including storm, sanitary and water for the future residential development of Carrington located in the northwest of Calgary. Work involved installation through an existing Environmental Reserve complete with re-construction of the existing dranage path and mitigating measures associated with protection of existing high-value vegetation. Work continued from there withint the limits of the Stoney Trail Transportation Utility Corridor (TUC), with depths of installation in the range of 11 to 17m.
Main challenges of this project were the movement of large volumes of loam and earth in order to complete the installation of the utilities and replacing that material back to pre-construction grades. The work included two directional bore shots below the TUC for a new Sanitary gravity sewer and water distribution piping.
Volker Stevin was contracted to relocate underground utilities to accommodate for the construction of a new treatment section at the Bonnybrook Wastewater Treatment Plant. The pipes diverted consisted of steel syphons of sizes 900mm and 450mm and of an HDPE syphon of size 650mm. Two 250mm steel sludge forcemains were also diverted. The average length of each diverted line was 135m and the average depth at 4.5m.
Construction was performed in a carefully timed sequence to ensure uninterrupted operation of the treatment plant at all times. Due to the nature of work, and excavating in close proximity to live syphons and forcemains under a constant 175psi of pressure, strict safety measures were implemented and followed throughout the project.
Volker Stevin was contracted to install a new water feedermain as part of the larger MacLeod and 162nd Ave SE Interchange project. The scope of work included removal and abandonment of existing feedermain pipe and the installation of new steel pipe re-aligned to accommodate construction of the interchange. A main valve chamber was added to the scope and constructed as well.
Being one of the many contractors on site, VSCL frequently coordinated their activities with the other contractors to ensure proper phasing of required work. The project was split into two major phases. The first phase was designed to allow for the initial opening of East-West traffic on the new bridge, while the second phase (currently on winter hold) was to complete the deep utility work on the north end of the project to allow for constructing the off-ramps and tying in bridge traffic to MacLeod Trail.
The project did come with challenges, such as working near many other contractors on site, to existing utilities, to the public and to live traffic. However, proper communication and planning proved to be critical in addressing those challenges.
Over 11,000 hours have been recorded on this project so far with no lost time incidents.
Volker Stevin Contracting was contracted to construct an emergency storm outfall for a private development, Heritage Pointe, located south of Calgary, on the east side of the QEII. The work included the completion of the storm system, including ties to the existing storm pond system, and creek for offload of the storm pond system in high water events. The work involved portions of open cut excavation as well as a 600mm Direction drill up a hill with an elevation difference of 40m, and a guided bore of a 900mm steel casing across the existing Utility ROW and future roadway.
The main challenges of this project were the installation of the 600mm HDPE line to be installed up a hill side to service as an emergency outfall for the new community. The area of the project involved a high Ground Water Table, which impacted the construction at the project site. The water mixed with the silty sand clays caused the material to flow when excavated, in order to be able to work in the excavation, a well point dewatering system was required to be setup and used. Once the localized dewatering had brought the water level down to a manageable elevation, the excavation for the dual purpose pit was completed. The pit was to act as the receiving pit for the directional drill and subsequent back-reaming to upsize the hole for accommodation of the 600mm HDPE, and the launching pit for the 900mm guided bore.
Due to the geological makeup and natural scouring of the hill side, during the directional drilling phase of the work, fracking to the surface of the drilling muds occurred, and was mitigated satisfactorily with our timely response. Immediately in-house forces and equipment (Maintenance crews, Hydro-vac and Vacuum Truck units) were mobilized concurrent with directional drilling operation, and cleanup was completed within days of the pipe installation completion.
As a whole the project was completed on time and within the budget allotted. The project was completed without any serious incidents or lost time.