Incorporating LID into Historic Building Preservation in an Urban Setting Susan Donaldson, University of Nevada Cooperative Extension Lynell Garfield, City of Reno
McKinley Park School Built in 1909 On National Register of Historic Places since 1985
Issues at historical site Façade damaged by rain drip off splashing and turf irrigation spray heads Moisture issues in basement of building Roof runoff to basement sump currently pumped to sanitary sewer ADA parking lot requested New west end stairs requested
Funding Two grants received by City of Reno: EPA/NDEP 319(h) grant Leveraged against local Truckee River Fund grant
LID project components: Rainwater capture Snow slide clips and rain gutters Rainwater transport Impervious channel at base of building Rainwater infiltration (low tech) Rain garden to east of McKinley building Rainwater infiltration (high tech) Pervious concrete lot Sustainable understanding Use of educational signage to encourage stewardship Sustainable industry Partnership and local pervious concrete trainings supporting City Of Reno Structural Controls Ordinance
BMP Sizing Using Design Guidance Worksheets 4514 4512 4504 4506 4516 4514 Topography important! Roof shed of approximately 4987.5 square feet draining to each BMP as 100% imperviousness www.tmstormwater.com 4516 4508 4502 4512 4506 4516 4504 4512 4506 4508 4518 4508 4524 4522 4504 4508 4506 4506 4508 4506 4502 4502 4512 452 4518 4532 4504 4514 4542 4524 4508 4504 4518
Rain Garden Designed by CFA landscape architect Using Design Guidance Worksheets, garden was sized based upon rooftop runoff volume for 0.6 storm, WQv: 237 ft 3 ; Surface Area = 550 ft 2 ; 6 or less standing water Roof runoff from east side of courtyard and east roofshed diverted to rain garden Approximately 650 square foot depressed landscape area; two interconnected basins underlain with drain rock
Total construction costs = $29,000
June, 2010
October, 2010 1 inch storm
No runoff to river
May, 2011
Education Press releases Tours Signage Video
Issues Maintenance needed to keep culverts open Some ponding of water in concrete swales Plants require irrigation and routine maintenance Public still does not understand project
Pervious Concrete Parking Lot Pervious concrete parking lot on west side of building Receives runoff from west side of courtyard and west shedding south roof Safety: no puddling in storms or after snowmelt Industry partners/training Public outreach Signage to encourage locals to consider alternative hardscapes
First step infiltrometer tests
Central drain 4 ft wide and 3 ft deep added due to clay lens
Design, installation and maintenance of porosity of pervious concrete are very important in success of material
15-foot rolling screed (not vibrational)
6 pavement depth 6 to 48 of base Covered for 1 week
Construction BMPs also demonstrated
Infiltration rate = 5 gallons in 35 seconds through 12 ring Total installation cost = $135,000 1 rainstorm on June 6, 2011
Maintenance Vacuum sweep at least twice a year Avoid fine sediments on pervious concrete
Public Outreach Participation in public events McKinley Centennial Celebration reached 700+ people with design and stormwater message Interpretive signage On site and on Truckee River walkway Maintenance manuals For staff & industry Brochures For visitors Placement on Parks walking tour map of historic downtown Reno Trainings Concrete installers, design engineers, operations & maintenance staff
Centennial celebration
Pre-project training
What did we learn? Grant writing involving pervious concrete New material no estimates for cost at time of grant writing Design process with 5 departments, landscape plan development took 6 mos. Landscape project must avoid mature park trees On site recreation users and special events must remain unaffected during project phases
What did we learn? Economy and staffing shifts affect maintenance staff and availability Materials testing absent for pervious concrete; hard to convince engineers Additional geotech: very important, soils were made up of fill and inconsistent perc tests told just part of the story
Continued education and stewardship of projects will be needed. (ex. Adopt a Park)
Questions? Sue Donaldson Lynell Garfield 775 336 0242 775 334 3395 donaldsons@unce.unr.edu garfieldl@reno.gov www.unce.unr.edu/nemo