Are the CDID #1 ditches waters of the U.S.?

Yes. CDID #1’s ditches are considered Waters of the U.S. and subject to the Clean Water Act.

Discharges to our ditches must meet City of Longview or Cowlitz County stormwater requirements, and comply with the 2019 Stormwater Management Manual for Western Washington

Permitted Discharges

Discharges from our ditches to surface waters are permitted as a Municipal Separate Storm Sewer System (MS4) under the Western Washington Phase II Municipal Stormwater National Pollutant Discharge Elimination System (NPDES) permit. As a Phase II Secondary Permittee, CDID #1 is required to also adopt and implement its own Stormwater Management Program (PDF) to control stormwater flows, educate the public, eliminate illicit discharges and reduce contaminated runoff.

Show All Answers

1. Are the CDID #1 ditches waters of the U.S.?
2. What is an illicit discharge?
3. Are non-stormwater discharges allowed?
4. Can I drain my swimming pool or hot tub to the ditch?
5. What do I need to know before starting construction?