UMaine Drainage Improvements A focus on alleviating the build up of surface water on the mall and me

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UMaine Drainage ImprovementsA focus on
alleviating the build up of surface water on the
mall and meeting discharge requirements into
Stillwater River set by DEP
NATO Name Hotel
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Members of Team Smahties

• Nathan Belz (aka Jeff Goldblum)
• Anthony Dumais (aka Jesse Bradford)
• Stephen LaPlante (aka John Belushi)
• Nathan Seguin (aka Napoleon Dynamite)
• Ian Simpson (aka Jason Statham)

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Primary Contacts

• UMaine Facilities Management
• Ron Brown
• Brian Foley
• CES, Inc.
• Shawn Small, PE
• Contech (Stormwater 360)
• Richard Tibbetts, Sales Engineer
• Invisible Structures (Rainstore)
• Kevin Cobaugh, Sales Engineer

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Problem Identification

• Puddles on the University Mall make travel
  inconvenient for pedestrians and are
  aesthetically unappealing
• Improper grading of the Mall
• Lack of drainage to move surface water away from
  Mall
• Discharge into Stillwater River does not meet DEP
  standards and regulations
• Increase in impervious areas on campus
• Editorial published in Maine Campus on October
  27, 2005 We Need to Clean Up Our Ugly Mall

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Schedule of Events
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Phase I
Drainage Improvements on The UMaine Mall

• Perform hydraulic analysis of the Mall
• Install French Drains along pedestrian walkways
  for storm water runoff collection
• Tie French Drains into the current storm water
  collection system that exists in Drainage Region
  5
• Regrade the Mall to facilitate drainage of
  surface water towards the French Drains

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Hydraulic Analysis of The Mall

• Land area 4 acres
• Obtained data from USDA TR-55 Method (Developed)
• 2-Year Event gt 4.2 ft³/s
• 10-Year Event gt 7.4 ft³/s
• 25-Year Event gt 9.2 ft³/s
• Discharge to be used in French Drain Design based
  on 25-year event gt 9.2 ft³/s

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Install French Drain and Regrade the Mall

• French Drain Dimensions
• 18 wide x 24 deep
• 1800 linear feet of 6 perforated pipe
• 2 slope from center of Mall towards French
  Drains

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Tie French Drain System into Existing Drainage
Structure

• Use two Type F catch basins to tie French Drain
  system into existing

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Phase I Cost Analysis
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Phase II
Hydraulic Analysis and Design for UMaine Storm
Water Drainage Region 5

• Hydraulic analysis of current Drainage Region 5
  using TR-55 Method
• Design of water retention and treatment
  facilities in proximity to Stillwater River based
  on 25-year storm event
• RainStore³ Retention Facility
• Stormwater 360 Treatment Unit

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Hydraulic Analysis of UMaine Storm Water Drainage
Region 5

• Land area 20 acres
• Obtained data from USDA TR-55 Method (Developed)
• 2-Year Event gt 21 ft³/s
• 10-Year Event gt 37 ft³/s
• 25-Year Event gt 46 ft³/s
• Discharge to be used in retention and treatment
  design based on a 25-year event gt 46 ft³/s

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Water Treatment Facility

• Used 25-year storm event storage volume to design
  a Vortechs water treatment facility
• Vortechs Model 1000
• 9 long x 6 wide x 7 deep
• Removes sediment, trash, free oil grease

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Water Retention Facility

• Used 25-year storm event storage volume to design
  retention facility with Rainstore³ Estimator
• 13,557 units
• Chamber size gt 95 x 128 x 4 deep
• Capacity of 45,000 ft³ of water (336,000 gallons)
• Obtained design details and technical
  specifications from Rainstore³ site
• Place Rip Rap around opening of outlet pipe to
  prevent erosion

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94 Void space provides 25 gallons of water
storage per unit
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Proposed Facility Locations
GREEN Rainstore³ Retention Facility TEAL
Stormwater 360 Treatment Unit
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Phase II Cost Analysis
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Estimated Project Cost

• Phase I 158,000
• Phase II 477,000
• Total Project Cost 635,000

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Questions???