Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Amber Meadows Pump Station Design-Build

 

Contract: $873,000

Design-Build Team Members
Owner: City of Frederick, Maryland
Design-Builder Johnston Construction Company
Engineer: Buchart-Horn, Inc.

Key Accomplishments:

• The acceptance of Johnston Construction Company’s alternate design concept proposing three suction lift pumps in lieu of the suggested submersible pumps design.
• The alternate design eliminated confined space issues thereby greatly simplifying operations and maintenance of the pump station.
• Significant cost savings were realized by the use of variable speed drive systems which eliminated the replacement of the existing deep wet well and also resulted in reduced future energy consumption.
• The alternate design provided a significant cost savings by eliminating full time by-pass pumping during construction by integrating a staged construction plan into the design.
• Directional drilling was utilized to replace 400 feet of underground electrical primary service. This avoided disrupting the daily operations of an adjacent medical complex and prevented damage to the established landscaping on the adjoining right-of-way properties.

Project Description:

Johnston Construction Company led the design-build team providing engineering, construction, and project commissioning services under a public bid fixed price contract for the $873,000, 1.6 MGD wastewater pump station upgrade.

The Amber Meadows Pump Station is a satellite pump station serving the highly developed commercial district along the Route 15 corridor, located in an upscale medical office complex. A major upgrade to the existing dry-pit pump station was required due to an increase in recurring station failures. The new station was constructed within a twenty foot sewer easement and designed to blend into the surrounding architecture and landscaping. Right-of-way conditions challenged the project by requiring the new station to be constructed exactly where the existing station was located. After relocating the existing generator, the station building was constructed around the below grade dry well. The existing station continued to be utilized during construction which eliminated the need for costly diesel by-pass pumps. Once the new pump station was operational, the existing below grade dry-pit pump station was demolished from within the building.

The upgraded pump station includes three new 40 HP Gorman Rupp suction lift pumps, associated variable speed controls, influent grinder system, flow metering equipment, telecommunications monitoring, and a 100 KW emergency generator. The equipment was fully enclosed in a new split faced masonry building with architectural features to match the surrounding commercial buildings.

The project was completed in July of 2005.