Distribution and Transmission

Pipeline design, and specifically water distribution and transmission main design, is a core practice for RH2. Our professionals have worked together to design distribution and transmission main ranging in size from 4 inches to 78 inches in diameter, and utilizing materials including ductile iron, PVC, HDPE, concrete cylinder, and steel piping.

We have developed specialized software which greatly improves the speed and accuracy with which we are able to complete pipeline designs. In fact, one project that we recently completed included more than 78,000 feet of pipeline, ranging in size from 4 inches to 36 inches in diameter. In order to meet funding constraints and a truncated construction season, RH2 successfully completed the design in less than 9 months, including survey, design, environmental and right-of-way permitting, and easement acquisition.

Over the past 10 years, RH2 has worked with more than 70 water purveyors throughout Washington and Oregon, designing new and replacement water main ranging in size from 4 to 78 inches and in a variety of pipe material for a total of more than 160 miles of water main.

RH2’s history of using computer-aided design to produce color 3D plans has consistently resulted in projects with tighter bids and fewer and smaller change orders. At times, the most challenging part of the design can be accomplishing the construction with minimal disturbance to the community. Since many pipeline replacement projects are located in older, well-established areas, there is often a need for community involvement to inform customers about what to expect and when. RH2 is accustomed to working with clients to develop detailed design plans and construction specifications that are easy to understand, thus helping to minimize unintended damage and inconvenience to customers and their property.

We have an exceptional track record of accomplishing pipeline projects with minimal or no negative feedback from surrounding neighbors. Other common obstacles to pipeline projects are poor record drawings of the existing infrastructure and utilities that cannot be accurately located. To help reduce unknowns and minimize conflicts and risk, RH2 has adopted special techniques for identifying and categorizing subsurface utilities that are based on ASCE’s Standard Guideline for the Collection and Depiction of Existing Subsurface Utility Data.

Our in-house staff are also skilled at providing efficient and effective services during construction, including submittal review, coordinating with contractors and other utilities, and providing inspection for specific construction activities.