Tackling Complex Shoring Challenges on the I-25 Over Comanche Road Expansion
October 10, 2025
How do you widen a highway, add new bridges, and keep traffic moving—all while working in tight spaces and around existing infrastructure? That was the challenge our team faced on the I-25 Over Comanche Road expansion project. At DHC, we pride ourselves on helping customers find cost-effective, practical solutions to complex construction problems. Every project…
232 Street Underpass
While D.H. Charles Engineering, Inc. is based in the United States, we also provide engineering services in many Canadian provinces. We recently had the opportunity to help a customer in British Columbia value-engineer a slide rail excavation shoring system on a large bridge construction project....
Burbank Water and Power Plant
Retaining stormwater is a massive challenge in the dry Southern California climate and stormwater retention and infiltration infrastructure is a critical piece of the water puzzle. However, placing these large preconstructed basins underground presents another challenge in itself. There are only a few ways to...
An Approach to Specialty Municipal Excavation Requirements
In almost all cases, excavation requirements are put in place by the local Authority Having Jurisdiction (AHJ) over a given project. This AHJ can be a municipality, building or structure owner, a railroad agency, an important utility owner, or multiple at once. Understanding how to...
Marysville & Binney Pumping Plants
At DHC we specialize in excavation shoring design for large underground water infrastructure. We love working with a contractor to come up with a solution that allows them to efficiently construct a new structure while also ensuring that all workers are safe during the process....
Laguna Treatment Plant
In Santa Rosa, CA, as is true in many cities, it’s important to maintain and upgrade infrastructure to meet the demands of a growing city. One of these needed upgrades was the replacement of a nearly 25-year-old UV disinfection system at the Laguna Treatment...
Cochran Basin Stormwater Conveyance
Utility work is far from glamorous. Utility systems are regularly overlooked, possibly due to the contents of the pipes or the fact that it literally is underground and unseen. Though these systems rarely get the recognition they deserve, they are an integral part of...
Purdy Creek Fish Barrier Removal
In the Pacific Northwest, management of natural resources, including the extensive network of streams and rivers, are of utmost concern. We rely on these resources for generating power, food, drinking water, and transportation of goods, and many local economies are dependent on their long-term sustainability....
Emergency Storm Drain Repair
Before joining the team here at D.H. Charles Engineering, I had only briefly heard of excavation shoring. Dig a hole, install supports, and ensure that the walls of soil don’t cave in. Although that is technically true, it barely scratches the surface of just...
Willamette Water Supply Project
The Willamette Water Supply Project is a $1.6 billion water conveyance pipeline project in Oregon. Pipeline construction began in 2016, and when substantially complete in 2026, will provide fresh drinking water, capable of meeting current and future needs, while ensuring resiliency, protection of public health,...
Tunneling Engineering 101
At DHC, we try our best to be the construction engineers that you can come to for any design on a construction site. So, when a contractor comes to us to design a jack and bore shoring system, we can help you make sure your...
Steel Culvert Rehab
DHC has recently completed multiple designs of arch and elliptical shaped steel casings for culvert rehab projects for InfraSteel. Structural load and stress calculations on the new casing sections were performed and submitted, to prove that the steel segments can safely support the full intended loading of...
Gaining Knowledge – Trench & Shoring Safety
The excavation shoring industry is consistently faced with the age-old challenges of working in unstable & changing soil conditions, managing groundwater, and protecting adjacent structures/utilities, while attempting to complete their work in a safe manner and remaining profitable. With projects getting progressively larger and more...