Holtwood Hydro Electric Power Plant Expansion

OVERVIEW

The Holtwood Hydroelectric Power Plant expansion project includes the 125-megawatt addition to the existing 108 megawatt plant, the demolition of an on-site existing coal-fired power plant, the construction of a new hydroelectric powerhouse, improvements to the fish passage at the Holtwood dam, and extensive roadway and rail modifications. There are more than 67,000 cubic yards of concrete, an on-site batch plant, more than 3,700 tons of reinforcing steel and more than 1.5 million cubic yards of excavation.

FACTS

Specialized Engineering is responsible for monitoring Construction Quality Assurance/Quality Control (QA/QC) during the phases of construction. Testing and Inspection Services provided by Specialized Engineering included the following:

  • Storm Water Management Construction
  • Utility Backfill
  • Deep and Shallow Foundation Construction
  • Reinforcing Steel
  • Structural Steel
  • Fireproofing
  • Formwork
  • Concrete Pre-placement
  • Cast-In-Place Concrete
  • Field Density Testing of Fill Materials
  • Masonry
  • Batch Plant
  • Precast Shop
  • Field Testing of Plastic Concrete

Specialized Engineering is conducting laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, masonry grout testing, and soil sampling in our onsite laboratory. Wish to learn more about this project? Please contact us at 800-773-3808.

USAMRIID Steam Sterilization Plant

OVERVIEW

The new U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) Steam Sterilization Plant Project includes a 3-story steel and concrete structure. The designed process capacity of contaminates is approximately 126,000 gallons per day of liquid bio-waste. The new structure will house multiple 7,000 gallon bio-waste reactors as well as multiple 30,000 gallon storage tanks.

FACTS

Specialized Engineering was responsible for surveying the potential hazardous material contaminates of existing infrastructure prior to demolition. This included that of suspected Asbestos Containing Materials (ACMs).

The foundation systems consist of caissons and spread foundations bearing on rock layers. To ensure the concrete shafts will have proper bearing capacity, Specialized Engineering is providing down-hole inspections of caisson excavations. During earthwork activities, vibration monitoring was also performed to determine if contractor activities would possibly cause damage to neighboring structures and infrastructure.

Responsible for field quality control and special inspection services during the phases of construction, Specialized Engineering is providing the following:

  • Structural Fill
  • Utility Backfill
  • Verification of Foundation Soil Bearing
  • Reinforcing Steel
  • Cast-In-Place Concrete
  • Structural Steel
  • Structural Masonry (Mortar/Grout)
  • Stone Sub-Base
  • Asphalt Paving
  • Spray-Applied Fireproofing

Specialized Engineering is conducting laboratory testing and analysis of proposed fill materials, concrete cylinders, masonry grout, hot-mix asphalt, and fireproofing density samples. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

City of Brunswick Wastewater Treatment Plant

OVERVIEW

The City of Brunswick Wastewater Treatment Plant project consisted of upgrading the existing 0.7-mgd wastewater treatment plant with an extended aeration plant to a 1.4-mgd enhanced nutrient removal plant. Included in the overall project was the installation of new pumps with variable frequency drives, remodel of lab and chemical feed areas and the creation of an expanded lab, office/locker room area. Additionally, the overall upgrades included the construction of a new three-basin sequencing bath reactor system and a new filter building that contains a mechanical screening system, grit removal system, chemical feed systems, and flow equalization.

FACTS

Specialized Engineering was responsible for Subsurface Investigation to determine the conditions of the site prior to excavation of materials, and monitoring Construction Quality Assurance/Quality Control (QA/QC) during the phases of construction.

Specialized Engineering provided the monitoring and completed documentation of the installation of the designed foundation improvement system (GEO-PIERS).

Testing and Inspection Services provided by Specialized Engineering included the following:

  • Structural Backfill/Fill
  • Reinforcing Steel
  • Structural Steel
  • Formwork
  • Concrete Pre-Placement
  • Cast-In-Place Concrete
  • Fireproofing

Specialized Engineering conducted laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, and soil sampling. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

City of Frederick Wastewater Treatment Plant

OVERVIEW

The City of Frederick Wastewater Treatment Plant project consisted of the expansion of the existing City of Frederick facility which included the construction of two (2) new, large clarifying tanks.

FACTS

Specialized Engineering was responsible for Subsurface Investigation to determine the conditions of the site prior to excavation, Environment Consulting, and the monitoring Construction Quality Assurance/Quality Control (QA/QC) during the phases of construction.

Specialized Engineering determined that the subsurface material was unsuitable for structural fill as previously anticipated. The unsuitable soil was considered to be environmentally contaminated and required special disposal at a certified location. Specialized Engineering prepared the required environmental documentation, testing, and monitoring to ensure the proper disposal of contaminated soil.

Testing and Inspection Services provided by Specialized Engineering included the following:

  • Structural Backfill/Fill
  • Reinforcing Steel
  • Structural Steel
  • Formwork
  • Concrete Pre-Placement
  • Cast-In-Place Concrete

Specialized Engineering conducted laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, and soil sampling. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

F.J. Griffith, Jr. Wastewater Treatment Facility

OVERVIEW

The F.J. Griffith Wastewater Treatment Plant project consisted of the construction of a new state-of-the-art 120-mgd water treatment plant in Fairfax County, Virginia. The new treatment plant replaced the existing Lorton and Occoquan Treatment Plants. The new facility also included public meeting facilities, a wildflower meadow and public ball field space.

FACTS

Specialized Engineering was responsible for monitoring Construction Quality Assurance/Quality Control (QA/QC) during the phases of construction. Testing and Inspection Services provided by Specialized Engineering included the following:

  • Structural Backfill/Fill
  • Reinforcing Steel
  • Structural Steel
  • Formwork
  • Concrete Pre-Placement
  • Cast-In-Place Concrete

Specialized Engineering conducted laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, and soil sampling. Wish to learn more about this project? Please contact us at 800-773-3808.

Seneca Wastewater Treatment Plant

OVERVIEW

The Seneca Wastewater Treatment Plant project consisted of the new construction and upgrades to the 25-year-old facility. Modernization of the existing facility was necessary to meet future wastewater needs of upper Montgomery County residents. Using advanced technology to protect the environment and the Chesapeake Bay, the Washington Suburban Sanitary Commission (WSSC) expanded the average plant capacity from 5-mgd to 20-mgd, with the possibility of future expansion capacity of 26-mgd. The new wastewater treatment plant uses state-of-the-art biological and chemical processes that remove 64-percent more nitrogen along with 77-percent more phosphorous than the original 5-mgd plant.

FACTS

Specialized Engineering was responsible for monitoring Construction Quality Assurance/Quality Control (QA/QC) during the phases of construction.

Testing and Inspection Services provided by Specialized Engineering included the following:

  • Structural Backfill/Fill
  • Reinforcing Steel
  • Structural Steel
  • Formwork
  • Concrete Pre-Placement
  • Cast-In-Place Concrete

Specialized Engineering conducted laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, and soil samples. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

Corbalis Water Treatment Plant Expansion – Stage 2

OVERVIEW

The Corbalis Water Treatment Plant expansion project consisted of the Stage 2 Expansion of the current water treatment plant. The Stage 2 Expansion included of the construction of a new water quality laboratory, visitor education center, a vehicular entrance to the site, a reinforced concrete Ozone contactor, a structural enclosure for a 300-foot walkway, along with a liquid oxygen storage facility with two 13,000 gallon tanks.

FACTS

Specialized Engineering was responsible for monitoring Construction Quality Assurance/Quality Control (QA/QC) along with performing Special Inspections and Construction Materials Testing and Inspections during the Stage 2 Development. Testing and Inspection Services provided by Specialized Engineering included the following:

  • Structural Backfill/Fill
  • Fireproofing
  • Reinforcing Steel
  • Structural Steel
  • Pre-Cast Concrete
  • Cast-In-Place Concrete
  • Built-up Asphalt Roofing
  • Ornamental Handrails and Railings

As Special Inspection Engineer of Record (SIER), Specialized Engineering assured project compliance with procedural requirements set forth in the Fairfax County Special Inspection Program Manual, which included the following actions:

  • FCCSS Preconstruction Meeting Attendance
  • Certification of Special Inspections
  • Verification of Approved Documents
  • Submission of Special Inspection Reports

Specialized Engineering conducted laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, masonry grout testing, and soil sampling. Wish to learn more about this project? Please contact us at 800-773-3808.

DDC/DDSP Central Heating Plant

OVERVIEW

The U.S. Army Corps of Engineers (USACE) DDC/DDSP Central Heating Plant project consists of the construction of a new Central Heating Plant (CHP) at Defense Depot Susquehanna Pennsylvania, New Cumberland, PA. The new CHP is designed to have two (2) 75 MBTU/HR boilers and one (1) 50 MBTU/HR boiler, with Number 2 diesel fuel as primary fuel. The designs include administrative office space, employee break area, restrooms and lockers, storage tank to hold minimum of a 30 day supply of Number 2 diesel fuel, along with an emergency back-up generator with automatic switch security fencing and access gate around the fuel tanks. Anti-terrorism/Force Protection measures will include laminated glass and traffic control barriers. The new utility infrastructure will connect to the existing distribution system. Upon completion of the project, the existing CHP, Building 86, two storage sheds, and two existing fuel oil storage tanks will be demolished.

FACTS

Specialized Engineering is responsible for monitoring Construction Quality Assurance/Quality Control (QA/QC) during the phases of construction.

Testing and Inspection Services provided by Specialized Engineering include the following:

  • Soil and Groundwater Sampling (Phase 1 ESA)
  • Structural Backfill/Fill
  • Caissons
  • Reinforcing Steel
  • Structural Steel
  • Cast-In-Place Concrete
  • Structural Masonry
  • Asphalt Paving

Specialized Engineering is conducting laboratory testing and analysis of proposed fill materials, testing of concrete cylinders, masonry grout testing, and soil sampling. Wish to learn more about this project? Please contact us at 800-773-3808.