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Stormwater Facilities 

 

DEEP EXPERIENCE IN DESIGN AND MAINTENANCE

United under one company, MacKay Sposito and Riparia Environmental bring clients complete stormwater services — spanning planning, design, maintenance, and compliance.

Together we provide comprehensive stormwater design and maintenance services to keep your facilities in compliance year-round. Our goal is to establish effective stormwater systems, and vegetation management, along with routine inspections and ongoing maintenance to ensure your infrastructure functions properly while meeting regulatory standards.

Examples of Well-Maintained Facilities

Wet Pond
Wet Pond

A basin that has two or more pool cells and is typically filled with water year-round. Designed to reduce flows, remove sediment, and reduce phosphorous.

Photo Credit: Stormwater Partners

Detention Basin
Detention Basin

Tried and true method of controlling stormwater flow from heavy rainfall. 

 

 

 

Photo Credit: Stormwater Partners

Swale
Swale

A common surface facility with a wide, flat-bottomed channel, filled with grass or other plants, slows flow, and reduces pollutants.

 

 

Photo Credit: Stormwater Partners

Cartridge Filter
Cartridge Filter

An underground system of filter media that effectively removes pollutants from stormwater.

 

 

Photo Credit: Stormwater Partners

Services

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Inspections

Initial system assessments, routine yearly status checks, post major storm event monitoring

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Vegetation Management

Leaf, blackberry, and other invasive plant removals, tree care and removal, mowing, specialty wetland and raingarden plant care and replacements

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Sediment Removal

Catchbasin cleaning, treatment manholes, filter vaults, detention ponds and pipes

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Hardware Repair

Cartridge replacements, ladder replacements, grates, flow control structures, pipe inspections, fence repair

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Engineering

 Civil design, facility redesigns, construction management, surveying, landscape architecture, and permitting

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Pest Control

Moles, voles, gophers, insects

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Source Control

Street sweeping, use-assessments, erosion control, problem root cause analysis

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Refurbishment

Restoring functions for bio-swales, wetponds, detention basins, raingardens, infiltration basins, reforming side walls and berms, impacted soil replacements

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Regulatory

Letter writing, surveying, engineering design, facility redesigns, permitting

A snapshot of our work

Vancouver WA

Port of Vancouver Waterfront Utility Improvements


Port of Vancouver
  • First phase of Columbia River waterfront development
  • Deep stormwater, sanitary sewer, and water lines for future extension
  • Transportation Improvement Board funding required quick completion
  • Installed during time of low groundwater levels due to proximity to the Columbia River

Camas, WA

Skyridge Middle School Drainage Design


Camas School District
  • Stripped and graded existing track to drain to a nearby catch basin
  • Constructed underdrain to supplement catch basins
  • Designed roof drain and french draining systems 
  • Designed a retaining wall 
  • New athletic field drainage system 
  • Added riprap ditch to the north side of the 

Vancouver WA

Sorenson Neighborhood Park


Clark County
  • Inclusive play elements including nature play areas
  • ADA access throughout the park.
  • Naturalized and sustainable water quality and detention facilities.

Vancouver WA

The Vancouver Clinic at 87th Avenue


The Neenan Company

Project Highlights:

  • 137,000 sf, three-story building
  • Existing Clinic building remained open during construction
  • Phase 1 –new building and south and west parking lots
  • Phase 2 – east parking lot and demolition of old building