Afghans National Army Garrison for the 4th Bridgade, 205th Corps Garrison, Phase I

Project Background

The project consisted of the design and construction of an Afghan National Army Garrison for the 4th Brigade, 205th Corps in Tarin Kowt, Uruzgan Province, Afghanistan. The garrison project consisted of new Brigade HQ Kandak, GSU Kandak, CS/RCC Kandak, CSS Kandak, Infantry Kandak, and other common facilities for the brigade, including all waste water treatment plant, support facilities, utilities and infrastructure as applicable. The project was defined as the design, materials, labor, and equipment to construct buildings, roads, utilities, and other infrastructure to accommodate a garrison with a design-end population of approximately 4,700 personnel.


Wastewater Treatment Plant (WWTP)

S&B Infrastructure, Ltd. (S&BI) was awarded a subcontract to design a wastewater treatment plant and outfall. The Wastewater Treatment Plant (WWTP) was designed as a partial mix aeration lagoon system that consisted of features such as a lift/pump, headworks, aeration pond, settling pond, sludge drying lagoons, central  control panel,  and a chlorine contact tank. The capacity of the wastewater treatment plant was approximately  930,000 liters per day.


S&BI included in the design package, a 14m2 chemical feed/storage building, 3m high chain link fence with Y- Y channel and triple strand concertina wire, aggregate surfaced vehicle parking spaces, driveways, and the roadway.


The partial mix aerated wastewater treatment lagoon systems were designed in accordance with the following: AED Design Requirements - Package Wastewater Treatment Plants and Lagoons, UFC 3-240-09FA Domestic Wastewater Treatment, US EPA. Municipal Wastewater Stabilization Ponds – Design Manual, EPA-625/1-83-015, and Wastewater Engineering Treatment and Reuse, Metcalf & Eddy, McGraw- Hill, latest versions.


S&BI submitted the complete design analysis, plans, and technical specifications for review and approval by USACE Engineering for the WWTP.


S&BI’s biggest challenge for this project was to fit the WWTP within a very limited existing ROW boundary area. S&BI closely coordinated with the construction contractor, geotechnical firm, survey firm and the USACE-AED to meet the WWTP design requirements and fit lagoons with existing ROW boundary. S&BI achieved this task by recommending to USACE to reduce the lagoon capacity from 930,000 to 586,000 liters per day and tie to a Dutch Pond on the north side of Tarin Kowt to offset the capacity requirement. These design requirements saved time and money for both the project and client.



Bob Sokoloski, Project Engineer - FOB Tarin Kowt


The Client was very satisfied with S&BI’s quick and accurate response to the design of WWTP. S&BI made a positive impact to the Design-Build team. Clients appreciated our support in saving money and time to USACE and best of all, offering positive solutions to project issues.

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