Permitting and Regulatory Approvals - Design-Build for Water and Wastewater Projects - page 276

utilities and required several iterations of proposed alignments to quickly
address the stakeholders' concerns.
• Expediting the process of securing a US Army Corps of Engineers 404 Per-
mit for a creek crossing where the pipeline crossed a jurisdictional water-
way. Design workshops were held on-site to assist in the development of
options and ensure clear understanding of the crossing challenges.
• Confirming locations of existing utilities quickly, so as to identify variation
between field conditions and design information, thus allowing reaction to
pinch points and clearance issuing well before these issues could impact the
construction effort. Finding adequate room within the existing easements
was a continual challenge.
• Satisfying multiple stakeholders, including the Town of Castle Rock, US
Army Corps of Engineers, land owners, homeowner's associations, and
the Colorado Department of Transportation; promptly addressing their
concerns provided an atmosphere of collaboration, which was essential to
the design-build process. The collaborative approach allowed the team to
keep moving forward and deliver the project ahead of the Town's critical
milestones.
Why the Owner Chose Design-Build
The primary reason the Town of Castle Rock chose a progressive DB delivery
method for the Accelerated Wells Installation project was the need to accomplish the
project on an accelerated eight-month schedule. The expedited schedule was neces-
sary to meet customer water demands and ensure that the Town's water customers
would not see a reduction in service and quality of their water supply. Completing
design and construction of two well development sites, four new wells, two new well
houses, and approximately 10,000 lin ft of new raw water pipeline in less than eight
months did not allow time for the traditional DBB process. Using DB enabled the
project to be delivered within the Town's desired time frame; the well houses were
completed one month ahead of schedule. Lower project cost and having a single
point of responsibility for project delivery were also attractive factors that influenced
the Town's decision to use DB.
Lessons Learned
Given the critical nature of permitting and easements to this project, all related chal-
lenges and risks were identified up front. Key high-risk items, such as right-of-way
acquisition and regulated creek crossings, were tackled immediately to minimize
their impact to the project.
Construction phasing was critical in order to ensure on-time delivery of this
project. The construction phasing was broken into four elements in two phases that
allowed the team to deliver initial raw water supply from the Woodlands 1 facility
early to meet initial water demands. The well house, well equipment and transmis-
sion lines associated with the initial element were released earlier to support key