Bates College Lewiston Maine
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1 Bates College Lewiston Maine Success with the Stormcrete Precast Porous Concrete System used as a Gravel Filter Inlet 2017 North Country Stormwater Tradeshow and Conference
2 Benefits of Porous Pavement Lessens the impact on existing storms or combined sewers Greater base-flow in streams and rivers Provides natural filtration through soils of TSS: Nutrients, Heavy Metals and other pollutants. Higher coefficient of friction means safer stopping More closely mimicking the natural hydrologic responses to a rainfall events Reduces the Heat Island effect common to conventional pavement
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4 The Pre-Stormcrete Porous Pavement Market Permeable Interlocking Concrete Pavers Pervious Concrete Porous Asphalt
5 Plugging Issues Due to run-on
6 Durability Issues
7 Bad Batch
8 tick tick tick.
9 Vote of no confidence shown by the engineer
10 Negative Perceptions of Porous Pavement in the Marketplace Durability Installation is labor intensive Inconsistency in mix from batch to batch Difficult to produce Weather dependent (can t install when too cold/hot) Difficult to maintain and repair HIGH No access to subgrade (utilities) RISK!!!
11 Introducing Stormcrete Modular Precast Porous Concrete Stormwater System
12 Each precast porous segment is REMOVABLE and REUSABLE Modular Precast Porous Concrete Stormwater System
13 Stormcrete Typically 3-man crew
14 Stormcrete Manufacturing Mixed / Placed / Covered +/- 20 minutes in controlled conditions
15 Each Slab is labeled with cast date and weight (i.e. density)
16 Bates College Lewiston Maine Success with the Stormcrete Precast Porous Concrete System used as a Gravel Filter Inlet
17 Bates College Lewiston Maine Expansion of Residential Living Areas Existing dwellings removed to make room for two new residence halls
18 Bates College Lewiston Maine ME DEP Site Location Permit Required City of Lewiston and Maine DEP required no net increase in runoff. 95% treatment on all new impervious areas 80% treatment on all developed areas (imp. and pervious areas)
19 Bates College Lewiston Maine Treatment must consist of: Pollutant Removal Mitigation for increased frequency and duration of channel erosive flows Mitigation for any potential temperature impacts
20 Bates College Lewiston Maine Attenuation/Storage Requirement: The system must detain, retain, or result in the infiltration of stormwater from 24-hour storms of the 2- year, 10-year, and 25-year frequencies such that the peak flows of stormwater from the project site do not exceed the peak flows of stormwater prior to undertaking the project;
21 Bates College Lewiston Maine Stormwater Quality and Quantity Measures Proposed and Employed to remove pollutants and slow the rate of stormwater discharge from the project site: Underdrain Bioretention Cells Bioswale/Raingarden Subsurface Gravel Filter
22 Bates College Lewiston Maine Subsurface Gravel Filter : Utilizing a conventional manhole for a subsurface filter dictates that the invert level to the filter be about 4 deep. This pushes the bottom of the filter potentially deeper than desired. Using the Stormcrete Precast Porous Pavement System allows for an inlet at grade. Eliminating the need to excavate deeper than necessary potentially too close to groundwater or ledge.
23 Bates College Lewiston Maine Subsurface Gravel Filter with Stormcrete System Inlet
24 Bates College Lewiston Maine
25 Bates College Lewiston Maine
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28 Stormcrete Run-on Row
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32 Stormwater SUV (Stormwater Utility Vacuum) Stormcrete Precast Porous Concrete Gutter
33 B.I.R.D. Bunyan Infiltration Restoration Device
34 Stormcrete - Modular Precast Porous Concrete StormWater System Green Infrastructure Benefits: Controls stormwater quality and quantity Slabs are manufactured, cured and stored in a controlled environment Porous section is removable / maintainable / reusable Provides access to sub-base utilities, spills, etc. Reduces life cycle costs Can be installed year round in almost any type of weather conditions Ready to use immediately pre-cured LOW RISK!!!
35 Localized Flooding at Corners
36 Stormcrete Modular Porous Concrete
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