Category Archives: Carollo

Successful Owner Project Procurements Begin With Deciding What’s Important

When considering a project delivery approach, municipal owners may be reluctant to choose a collaborative-delivery method. Design-bid-build (DBB) has been the standard approach in public works contracting, so changing to a different approach can be challenging and uncomfortable. Some owners may fear that they have less influence with a collaborative-delivery approach than they do with DBB. Owners still maintain influence throughout collaborative delivery but will exert that influence differently than with DBB. This influence starts with the procurement documents and is memorialized in the design-build (DB) contract.

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Topics: Carollo, Design-Build, Owners.

Progressive Design-Build Delivery Provides Design and Construction Flexibility for the Clifton Water District

The Clifton Water District (District) was formed as a Special District within the state of Colorado in 1951, and provides water service to more than 13,700 residential and commercial users. When the District’s conventional water treatment system was no longer able to cost effectively treat their source water, it became necessary to purchase more expensive potable water from an outside supplier. To minimize the impact of the higher water cost to their ratepayers, the District determined an upgrade of their existing treatment system was necessary. When it was time to implement this upgrade, the District knew they needed to balance a number of key objectives, primary among these was to continue to supply their customers with a reliable source of potable water during construction of the project.

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Topics: Carollo, Progressive Design-Build, Water Design-Build Project.

How Collaboration in a CMAR Project Successfully Delivered a Treatment Plant Expansion at UTRWD’s Riverbend Water Reclamation Plant

Upper Trinity Regional Water District’s (UTRWD) Riverbend Water Reclamation Plant (WRP), located in north central Texas near the city of Aubrey, needed to increase its capacity from 2 million gallons per day (mgd) annual average daily flow to 4 mgd with a peak flow rate of 16 mgd. This expansion was required to keep up with the economic growth occurring to the north of the Dallas-Fort Worth metroplex. In order to increase capacity, a new influent pump station, new screening and grit removal headworks, a new sludge pump station building, modification of sequential batch reactor basins to conventional aeration basins with ballasted activated sludge, and new secondary clarifiers were required.

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Topics: Carollo, CMAR, Wastewater Infrastructure/Treatment.

Does an Owner Advisor Ever Assume the Role of a Construction Manager on a Design-Build Project?

It’s important to first define what we mean by “construction management (CM).” In the water industry, the term CM has become synonymous with what are truly construction administration (CA) services, where the owner employs the OA to be the quality assurance agent for the project. Construction management is the responsibility and the job of the design-build (DB) team. In essence, the DB team retains the responsibility for managing the construction phase of the project and has responsibility for the overall quality control (QC) of that work. An owner advisor (OA) working as a representative of the owner as a CA has the responsibility for quality assurance (QA). This includes traditional activities such as payment administration, critical contract submittal and shop drawing reviews for compliance to the contract documents, interpretation of the contract documents, inspection of the work, etc.

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Topics: Carollo, Design-Build, Owner Advisor.

The Olathe Water Treatment Plant Expansion: Fixed-Price Design-Build

The decision of the City of Olathe, KS, to pursue a design-build delivery method to expand its existing 17-mgd water treatment plant to 36 mgd and then retaining Carollo Engineers to perform a feasibility study, were essential first steps towards achieving a successful project conclusion. Following the feasibility study, the City not only contracted with Carollo for 30% design of the expansion; but also a joint venture of Carollo Engineers and Garney Construction to complete the design and construct the treatment plant expansion. This award-winning design-build project included the integration of membrane filters into the existing retrofitted lime-softening facility.

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Topics: Carollo, Fixed-Price Design-Build, Water Design-Build Project.

Carollo Engineers Supports California Direct Potable Reuse Initiative

WDBC member Carollo Engineers, a California-based, water-focused consulting engineering firm, recently announced a pledge of $150,000 toward a new Direct Potable Reuse (DPR) research initiative, led by the WateReuse Research Foundation (WRRF). Since July of 2012, the WRRF has raised more than $2.7 million toward the California DPR Initiative, which exists to help California meet its legislative and state-mandated DPR initiatives by 2016.

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Topics: Carollo.