Why Do We Take Soil Erosion & Sediment Control Measures?

Walter HopkinOur Blog

Have you ever driven past a construction site and wondered: What is the purpose of that black fabric installed along the site’s border? This black filter fabric is known as a silt fence, and it plays a vital role in preserving a site’s soil. Normally, vegetation stabilizes topsoil so that stormwater is less likely to disturb it and transport it …

Flood Hazard Area (FHA) Emergency Rule-making

Walter HopkinOur Blog

Recently, the New Jersey Department of Environmental Protection (NJDEP) announced that it would be implementing Emergency Rule-making to the Flood Hazard Area Control Act (FHACA) Rules (or N.J.A.C. 7:13). Five key points from this Emergency Rule-making include, but are not limited to: Non-tidal design flood elevations will be raised by two feet. “Non-tidal” applies to sites that are not affected by flooding …

Innovation in Light Design – Visual Lighting

Walter HopkinOur Blog

In most New Jersey municipalities, there are minimum lighting requirements for roadways, parking lots, and outdoor recreational areas. These requirements exist to ensure the safety of drivers and pedestrians traveling through the area. So, Civil Engineers and Landscape Architects prepare lighting plans to demonstrate compliance with these requirements, when applicable. Here at WJH Engineering, we are constantly re-investing in our …

How Fast Does Water Travel?

Walter HopkinOur Blog

The answer to this question has become increasingly important to land developers. The speed at which water travels through soil (permeability) can affect the amount of land available for development on a property. In stormwater management design, which is required for virtually all development, permeability determines the size of a stormwater management system. If the soil has a low permeability, …

What is the DRCC?

Walter HopkinOur Blog

Do you know if your project is subject to DRCC review? Well, if you are located in Hunterdon County, Mercer County, Somerset County, or Middlesex County it very well might be! The Delaware and Raritan Canal Commission, also known as the DRCC, is a state agency that was created in 1974. Their mission is to prepare, adopt, and implement a …

Continuing Education at WJH Engineering

Walter HopkinOur Blog

Skilled workers are an essential asset for any business. They play an important role in developing a company’s reputation and ongoing success. Being in a field as dynamic and innovative as civil engineering and surveying, it is of utmost importance that our employees are familiar with the latest programs and standards used in the industry. To kick off the new …


Stormwater Pollution Prevention Plan

Walter HopkinOur Blog

Most of our clients (contractors, builders, and commercial site owners/operators) are required to file and maintain a Stormwater Pollution Prevention Plan (SWPPP). A SWPPP is a site-specific document that consists of plans and a written report addressing the sources of stormwater pollution present at a construction site. This pollution can be as simple as sediment, leaves and tree branches, or …


Septic Design Plans

Walter HopkinOur Blog

At WJH, we provide a wide range of services, including plot plans, subdivisions, site plans, surveys, septic design plans, and many others. A septic design plan is prepared when there is no public sewer available to a site. This can limit the size and scope of a project. A commercial building’s size can be constrained based on the availability of …

Hudson Pointe Redevelopment Project - Keyport NJ

Hudson Pointe Redevelopment Project – Keyport NJ

Walter HopkinOur Blog

WJH, along with the team of attorney Sal Alfieri of Cleary, Giacobbe, Alfieri and Jacobs, Planner Christine Cofone, and Architect James Monteforte were recently successful in obtaining Planning board approval for an exciting mixed use residential development! This approval was the culmination of 2 years of coordination, cooperation and hard work from the team and the Borough’s professionals T&M Associates …

Operation & Maintenance Manual maintenance activities for all stormwater management systems

WJH’s O&M Manuals

Walter HopkinOur Blog

Most of our projects include the design of stormwater management systems, which can include detention basins, underground recharge systems, rain gardens, and more. However, in addition to the design and construction of these systems, it is imperative to keep in mind the day-to-day operation and recurring maintenance of these systems, to allow their continued ability to treat the stormwater runoff …