In the Ralston North Badger Basin of Powell, Wyoming, an 84-inch diameter triple-span culvert had outlasted its original design life and necessitated either replacement or repair. To circumvent potential delays and road closures, the Wyoming Department of Transportation (WYDOT) explored the feasibility of a reline solution.
Initially, WYDOT had proposed a 72-inch HDPE liner pipe for the culvert's rehabilitation project. However, upon careful consideration, they recognized the potential for greater efficiency and cost-effectiveness with a DuroMaxx® SRPE liner solution compared to the original plan. Consequently, they approved the solution proposed by Mountain Construction Company, marking the first instance of integrating a DuroMaxx® SRPE liner solution into a WYDOT reline project.
Contech Engineered Solutions manufactured 216 LF of 72-inch plain end DuroMaxx® for this reline project, comprising three 24 LF-long pieces per run. The timely manufacturing and delivery of these segments met the project's stringent deadlines. Wilson Brothers Construction, the subcontractor, internally welded these three pipe segments before their insertion into the host pipe. Subsequently, a lightweight grout was pumped through a flowfill header cap. The integration of internally welded couplers joined the plain ends seamlessly. Leveraging their extensive experience in Wyoming, Wilson Brothers Construction adeptly sliplined each section into the existing triple-barrel span, employing a unique technique developed through their numerous reline projects. This underscores the evolving innovation in this construction methodology.
Contractors favor DuroMaxx for large diameter relines due to its low profile, allowing for a larger inner diameter while preserving the desired outer diameter (OD). Nick Wilson of Wilson Brothers Contractor attested to this: "I opt for Duromaxx in reline projects of 60-inch diameter and above. Its lower profile compared to other pipes I've used ensures a snug fit, requiring less grout and yielding a superior final product. Plus, Contech's swift delivery is a game-changer."