Walden provides a variety of services for the development and improvement of drainage and stormwater systems including but not limited to design of gray and green infrastructure, water quality components, stormwater safety, MS4 programs and permitting and many types of stormwater-related compliance concerns every day.  Our experience and knowledge makes us the best-equipped team to tackle the most challenging drainage or stormwater problems. We are staffed with highly experienced civil and environmental engineers, geologists, and scientists who have the knowledge and skill to help our clients move forward in a cost-effective manner. By hiring Walden, you can increase the confidence that your residents, elected officials, regulatory agencies and other stakeholders will have in your stormwater systems.

Walden’s Stormwater Services are listed below:


  • MS4 Services; Designated Program Coordinator
  • Illicit Discharge Surveys, Investigations
  • Stormwater Utility Feasibility Studies, Implementation
  • Grant Writing and Administration
  • Infrastructure Condition Assessments/Audit
  • Subsurface Utility Engineering
  • Regulatory Strategies and Negotiations
  • NPDES/SPDES Permitting
  • Bulkhead Design and Rehabilitation
  • Watershed Quality Studies
  • Stormwater Management Plan & Program (SWMP) Development
  • Minimum Control Measure (MCM) Development
  • Stormwater Pollution Prevention Plan (SWPPP) Development
  • Erosion and Sediment Control Inspection and Training
  • Construction Site Stormwater Runoff Control
  • On-Demand Training Programs


MS4 Inspections and Compliance

In preparation for the scheduled USEPA/NYSDEC inspections, Walden completed MS4 compliance evaluations at the Town’s facilities to identify compliance issues and recommend actions to comply with MS4 requirements and best management practices (BMPs) in order to avoid potential violations. Read more

MS4 Supplemental Environmental Project (SEP)

Walden implemented a Supplemental Environmental Project (SEP) in mid-2014 to address a violation observed during USEPA’s March 2013 MS4 inspection at an Inwood Highway Yard. At the time of this inspection, the Contractor installing underground storage tanks at the site discharged unfiltered turbid water into the storm drain, in violation of NPDES regulations. Read more