Storm Water System

The crew cleans all 1,570 storm inlets yearly and performs hydraulic cleaning (jetting) of the pipes. Some 56,700 feet is annually inspected with a television camera to determine and inventory pipe conditions. You can find the Storm-Water Ordinance under City Code 6-6-1.

To report illicit discharges and other stormwater issues, please contact:

Matt Culpo - Stormwater Engineer
(406) 447-8073
mculpo(at)helenamt.gov

The storm-water system is regulated under a Phase 2, MS-4 MPDES permit issued by DEQ. The City has developed a Storm-Water Management Plan and a Storm-Water Master Plan. New additions to infrastructure to the system and new connections that will discharge to the MS4 system must be developed to meet state standards, City of Helena Engineering standards and the system is operated to apply "best management practices" to protect storm-water quality. 

The storm-water system consists of:

  • 71 miles of storm pipe, which range from 8" to 90" pipes
  • 32.6 miles of open storm drainage ditch
  • 707 manholes
  • 1,790 storm inlets

This section will be responsible for helping implement the Phase II storm-water program.

Helena is divided into six drainage basins:

  • West Side
  • Last Chance
  • Davis
  • Bull Run
  • Airport
  • East Side

The crew cleans all 1,570 storm inlets yearly and performs hydraulic cleaning (jetting) of the pipes. Some 56,700 feet is annually inspected with a video camera to determine and inventory pipe conditions.