Risk /Reward
July, 2016
A new 28,000 ft force main now stretches from Anne Arundel County, Maryland to Annapolis thanks in part to the completion of a 4,200 ft river crossing by Carson Corporation. Horizontal Directional Drilling 24” HDPE over 4,000 ft presented risks that Carson Corporation studied prior to bidding this project. Carson Corporation determined that conditions under the South River pushed 24” HDPE DIPS DR-7 product pipe to its pullback load tolerance. Fortunately, Carson produced a clean 36” bore and the pullback forces never neared unsafe levels.
Installation Details and Project Summary
Owner: Anne Arundel County, MD
Consulting Engineer: GHD
Project: Mayo WRF ENR FM – South River
Location: Anne Arundel County, MD, Mayo Peninsula, South River
HDD Contractor: Carson Corporation, Lafayette, NJ
Pipe Supplier: Tricon
Pipe Size/Length: 4,200’ of 24″ DR7 HDPE DIPS
Installation: Horizontal Directional Drill
Steering Contractor: Inrock
Carson Corporation Contact:
Bob Carson-VP of Business Development (201) 230-4686, [email protected]
Carson Corporation overcame many obstacles during this installation, some of which include:
-Working with 6 regulatory agencies
-Residential noise restrictions
-Limited time frame because shellfish and fish spawning patterns
-Pushing pullback capacity of HDPE
-Maintaining hole while drilling through unstable soils
Overcoming these obstacles and others led to a successful completion of this project. The reward for Carson Corporation is installing a critical piece of a big project and “doing it right” despite many challenges.
Please see attachments for additional articles relating to this important project.
HDPE in for the Long Haul Via HDD
Capital Gazette Article