Wetland & Stream Restoration

  • Science
  • Engineering
  • Design

Green Infrastructure & Stormwater Management

  • Science
  • Engineering
  • Design

Nature-based Design & Resiliency

  • Science
  • Engineering
  • Design

Pond & Lake Management

  • Science
  • Engineering
  • Design

Water Resources Engineering

Natural Resources & Landscape Architecture

Regulatory Compliance

Geosciences & Soils Lab

Nature-based Solutions for Watershed Management and Ecological Restoration

Since 1998, we have led 10,000+ water resource projects for over 2,000 clients, producing award-winning environmental solutions from concept to construction.

Our Firm

We are committed to improving our ecosystems, quality of life, and communities for the better.

Our passion and commitment to the integration of innovative science and engineering drive us to exceed on behalf of every client.


more about us

Inspired by Nature. Engineered with Science.

see all awards

Our Initiatives

Passion + Commitment

From safety to sustainability, we’re always striving to improve. Through our internal working groups, staff are empowered to share ideas and take action so our firm can continue to evolve and grow.

Read more
  • Sustainability & Stewardship

  • Justice, Equity, Diversity, & Inclusion

  • Climate Change & Resilience

  • Health & Safety

1 / 10

Hot Topics

HARMFUL ALGAL BLOOMS. HABs have serious, negative impacts on water quality and the health of people, pets, and livestock. What causes HABs, how can they be prevented and what can you do to help?

Inland Flood Protection Rule.New Jersey Governor Philip Murphy announced the Administration’s adoption of the Inland Flood Protection Rule to better protect New Jersey’s communities from worsening riverine flooding and stormwater runoff.

FLOATING WETLAND ISLANDS. Looking for a unique and creative way to manage nutrient runoff in freshwater lakes? Floating Wetland Islands are a low-cost, effective green infrastructure solution used to mitigate phosporus and nitrogen stormwater pollution.

LANDSCAPE ARCHITECTURE.Planting native flowering plants, grasses and trees boosts the aesthetic appeal of any landscape while reducing stormwater runoff and increasing habitat for birds, pollinators, and other critical species. Read about a planting initiative we designed and implemented at Thompson Park as part of a multi-faceted Stormwater Treatment Train project.

MANAGING INVASIVE SPECIES.  The Champlain Canal, a 60-mile canal in New York that connects the Hudson River to the south end of Lake Champlain has been identified by natural resources scientists and managers as a major pathway by which non-native and invasive species can invade Lake Champlain. In partnership with the USACE, our team is working to prevent the transfer of invasive species via the Champlain Canal.

CLIMATE CHANGE AND LAKES. Lakes are living laboratories through which we can observe the local effects of climate change in our own communities. We put together a list of four inter-related, climate change induced environmental impacts that can affect lakes and lake communities.

WHAT IS GREEN INFRASTRUCTURE?  Green infrastructure can be an eco-friendly way to handle stormwater runoff. Learn about best practices and read about a real-world example of green infrastructure techniques in action.

BUILD A RAIN GARDEN. Rain gardens are a cost effective, attractive, and sustainable way to minimize stormwater runoff and filter out pollutants. This aesthetic, low-maintenance addition to any outdoor landscape creates a functioning habitat that attracts pollinators, beneficial insects, and birds. And, in a small way, it helps reduce erosion, promote groundwater recharge, and minimize flooding.

BECOME A SCHUYLKILL RIVER COMMUNITY SCIENTIST.  Looking for an easy way to get involved? Find a spot on the Schuylkill River and visually assess any debris or dumping along 100-foot stretch of its riverbanks using our mobile-friendly form.  It only takes 5 minutes!

Aquatic Organism Passage & Culvert Restoration.  Historically, culverts were built to move water quickly, however the designs present a barrier for migratory fish and aquatic organisms.  AOP efforts seek to maintain connectivity by allowing aquatic organisms to migrate upstream or downstream under roads. Princeton Hydro partnered with New York – New Jersey Harbor & Estuary Program (HEP) and the Hudson River Foundation to create a toolkit for addressing problematic road-stream crossings.