The overall scope of work included turning the existing extended detention structure designed for quality control into 1.49 acres of drainage area, of which .71 acres would be impervious cover. Included in this task was a Submerged Gravel Wetland for Drainage Area 1 that includes impermeable liner, layers of wetland soil, pea gravel, gravel median, cleanouts, observation wells, pretreatment, and wetland plantings as well as a Surface Sand Filter system for Drainage Area 2 which consists of 3” topsoil, 18” clean washed “concrete sand”, 3” of pea gravel before collected by a 6” perforated PVC pipe underdrain system.
This nearly $403,000 project was completed by our team within a 7-month time-frame during the Spring, Summer, and Fall of 2018 – the wettest seasons in recent years. Ferguson Trenching faced many challenges along the way including the current state of the site with respect to wildlife and overgrowth, the unpredicted amount of rainfall, logistical challenges, and adherence to strict protocol by the government contract.
The work area had not been maintained for a number of years, in turn making it home to an abundance of wildlife. Most of the wildlife like the deer and the groundhogs were consider harmless, but there was a fair share of snakes, chiggers and ticks that the workers needed to look out for and take appropriate precautions. Before we even started work, a job hazard analysis was completed for the clearing and grubbing task. The potential hazards of snake, tick and chigger bites were discussed and the steps to take to alleviate these hazards. Standard Personal Protective Equipment (PPE) of long pants, safety glasses, steel toed boots, hardhats and work gloves were required. The crew was further required to wear long sleeves during clearing and grubbing.
Weather can be an issue on any construction project. It can affect the materials being used and it can lead to the rescheduling of tasks which can disrupt the overall schedule of a project.
Pond retrofits can be very challenging because most of the time you’re working at the lowest point on a construction site where all the surrounding rain water drains to. You’re always at the mercy of Mother Nature. In our case, she showed no mercy! From the start of construction to the end, it rained. During construction, 49.83 inches of rain was measured. During the month of May alone, 8.92 inches of rain fell. 2018 would go on to become the wettest calendar year on record.
There were many weeks where it seemed like you were taking one step forward and two steps back. Stabilized slopes had to be re-graded and re-stabilized numerous times because of washouts. Pumps ran around the clock to keep areas drained down enough to work. The workers spent countless hours of hand shoveling silt that had washed into the lined pond. When the weather cooperated, the employees worked longer hours and even weekends to make up for missed days because of the rain.
Access to the pond was difficult. A stone haul road had to be built from the roadway to the perimeter of the pond. However, because of the grade elevations and size of the limits of disturbance, that was as far as dump trucks could go. All excavated dirt and aggregate materials had to be “carried” by machine to and from this point, greatly slowing down productivity. The sequence of construction also made things tight on site. Certain areas were required to be stabilized preventing those areas from further being used as space to move materials around site. With the tight quarters to work within, specialized equipment was brought in to convey materials that couldn’t be reached by the standard equipment on site.
In addition to adding an access road to the site, our team had to initiate an environmentally friendly waste management plan prior to any site preparation being completed. It was encouraged by the General Contractor and owner to utilize recycled materials in order to limit the waste produced on site. The site had to be kept clean and organized throughout the entire project.
We also could not interrupt any exiting utility service for any purpose without notifying the owner.
Ferguson Trenching Company successfully completed this project on budget and ahead of schedule.
Proud to be awarded an Excellence Award at ABC Chesapeake Shores’ 2019 Excellence in Construction & Safety awards banquet for this project.
The Ferguson Trenching Company team took on the fast-tracked Westfield Annapolis Mall Phase 2B Food Court Renovation project during the winter of 2018. We were tasked with installing 360 feet of piping that lead from the Westfield Annapolis food court and movie theater entrance to an adjacent parking lot. In addition, we were asked to install two 2,000-gallon grease interceptors which weighed in at roughly 25,000 pounds. These grease interceptors had to be buried in a 16 ft x 20 ft area at depths over twelve feet. Trench boxes were used one at a time to safely maneuver and install these large vessels.
One of the biggest challenges our team faced was not necessarily the fast-tracked 45-day completion timeline, but it was the restriction that was placed on us during that timeframe. During the entirety of the installation and restoration process, we were given limited working hours of Sunday through Thursday evenings of which Ferguson Trenching could only utilize overnight hours (10pm to 8am). This was due to having the mall entrance open during all standard business hours so that it did not impact the publics ability to access the mall at one of its main entrances.
Although we were only given 45 working days and extremely limited working hours to install our scope of work and complete all restoration, we completed the project in 30 days.
Pedestrian and Vehicular Control
Given that our work area was situated at the main entrance to the food court and movie theater, special attention had to be paid to protecting mall pedestrians and vehicles. Every night we set up a safety perimeter around our work area. Orange construction fence and posts enclosed our entire work area to prevent pedestrian traffic from entering the work zone. In addition to the construction fencing, water filled barricades were installed to block vehicle entrances so that cars and delivery trucks could not enter the site. Every morning this would all be taken down before 8AM so the site could be returned to normal use by mall patrons. Any open trenches were either backfilled or steel plated each morning to protect the public from any potential hazards. We had to be extremely attentive when setting these perimeters up because although the mall stores were closed, there were still pedestrians entering and exiting the movie theater throughout the evening hours.
Due to the fact that our work zone had to be returned to normal operations every morning, all equipment and material utilized had to be moved to an off-site staging area every day. Not only was this an added challenge for our crew, it required significant coordination with our dispatch department to make sure equipment was moved in a timely manner. With our already tight schedule and overnight working hours, we needed to make sure this process was smooth and quick so that we did not waste man hours on the job.
In addition to equipment and needed materials, any dirt excavated from our trenches had to be placed on dump trucks and hauled out in the middle of the night. Our team could not leave any dirt onsite which meant this process had to happen rather frequently. Since dump sites aren’t open in the middle of the night when we were able to complete the work, special arrangements were made.
Our team won an Excellence Award by ABC Chesapeake Shores during their Excellence in Construction & Safety Awards banquet on Thursday, September 19, 2019 for this project.
Forest Drive: Baltimore Gas and Electric Company (BGE) safely and reliably deliver gas to more than 655,000 customers in central Maryland. BGE’s STRIDE plan supports accelerated modernization of BGE’s natural gas distribution system to enhance safety and reliability. As part of BGE’s ongoing effort to maintain safe and reliable energy delivery systems, Ferguson Trenching Co., Inc. was awarded a contract in January 2015 to upgrade a gas main along Forest Drive between Greenbriar Lane and Spa Road. Our crews are installing approximately 4,550 linear feet of 8”, ¼” wall, wrapped HP steel pipe. In order to minimize the impact on the surrounding community and normal traffic patterns, the construction is taking place during overnight hours.
To keep pace with Maryland’s electricity-driven lifestyle, Competitive Power Ventures (CPV) is building a 725 megawatt natural gas-fired combined cycle power plant in Waldorf, Maryland. The new facility will generate enough electricity to power more than 650,000 homes and uses state-of-the-art technology to produce electricity efficiently and cleanly to help meet the region’s demand for energy.
When completed, CPV St. Charles will be one of the cleanest natural gas facilities ever built in Maryland and Washington, DC area, using clean natural gas and helping reduce dependency on older coal-burning power plants which currently supply a majority of the region’s power.
Ferguson Trenching Co., Inc. was subcontracted by CPV to design and construct the required natural gas infrastructure to the power plant site. Our crews installed over 6,400 linear feet of 16”, ½” wall, X-52, OHP steel pipe and a meter and regulator station on a 3.5 acre site, adjacent to Dominion Transmission’s pipelines. Despite a demanding schedule, Ferguson Trenching Co., Inc. finished the project ahead of schedule.
Fort Meade has a workforce of approximately 39,000 members, composed of military, civilian and contractor personnel. It is the fourth largest workforce of Army installations in the continental United States. In 2009, American Water (AW) was awarded ownership and a 50-year contract for the operations, maintenance, upgrades, renewal and replacement of water and wastewater systems at Fort Meade.
In 2013, AW awarded Ferguson Trenching Co., Inc. (FTC) a design build contract to increase fire flows to the 6th Cavalry Troop Housing located on Fort Meade. FTC is in the process of upgrading 3,000 linear feet of aging 8” cast iron water main with 12” PVC C-900 water main. In addition to the water main, FTC is installing eleven fire hydrants, reconnection three 8” fire service connections and thirteen 4” water service connections. The majority of construction is taking place in 6th Armored Cavalry Road and requires extensive pedestrian and vehicular maintenance of traffic.