Plan Review

The Engineering Division reviews proposed development plans to ensure that stormwater is managed according to code requirements, both during and following construction. The Engineers promote "best management practices" (BMPs) that manage stormwater for both water quality and quantity.

From the earliest stages of site design, storm water management must be a key consideration. By identifying those parts of the site best suited for dealing with stormwater in a natural way, conservation design elements can be applied. This is the first step to green site management and to intelligent sustainable development.

Other Agencies in the Process

New Castle County is a designated agency for regulating the Delaware Sediment and Stormwater Program. To view the regulations or information about the program, visit the DNREC Division of Soil and Water Conservation website.

The Water Resources Agency maintains the Water Resource Protection Area maps that depict layers representing four main categories of water resource protection areas in New Castle County, Delaware. To view the WRPA maps, visit the Water Resources Agency online.

Consistency Reports

View a list of archived consistency reports.

General Information

  1. DelDOT and DNREC Sanitary Sewer Permit Submission Process (PDF)
  2. Design Routing Bio Retention Systems (PDF)
  3. DNREC Delegation (PDF)
  4. Drainage Code Waiver Request
  1. Expedited Plan Memo (PDF)
  2. Limit of Construction and Disturbance (PDF)
  3. Lines and Grades Guidance Memo (PDF)

Water Quality Improvement Plans

  1. Water Quality Improvement Plan - Christina River Watershed FINAL 2020
  2. Water Quality Improvement Plan - Dragon Run Creek Watershed FINAL 2020