Team 3: The Infiltrators Project Wrap-up Outline Intro - - PowerPoint PPT Presentation

Team 3: The Infiltrators

Project Wrap-up

▪

Intro

▫

Team Members

▫

Project Recap

▪

Design

▫

Overview

▫

Specifics

▫

Details

▪

Deliverables

▫

Plan Set

▫

Computer Model

▫

Educational Tool

▪

Conclusions

▫

Lessons Learned

▫

Project Assessment

Outline

Intro Design Deliverables Conclusions

Elvin Vindel

The Team

Megan Daubenmier Steven Johnson Peter Wagenmaker

Project Recap

Team 03 has come alongside the Plaster Creek Stewards to design a robust stormwater management plan for Christ Church’s property, and to aid the overall effort to restore Plaster Creek.

phpd.online.co.uk

Intro Design Deliverables Conclusions

Concerns:

• Disrupted habitats downstream from:
• Significant erosion in ravine
• Frequent flashy flows
• High sediment levels

Cause:

• High volumes and velocities of parking

lot runoff exiting site through ravine

Design Overview

Intro Design Deliverables Conclusions

1. Treatment of runoff from parking lots via rain gardens. 2. Redirection of runoff from parking lots to existing detention pond. 3. Extension of pond flow path via bioswale and regrading. 4. Redesign of pond outlet structure.

Design Solutions

Intro Design Deliverables Conclusions

Size:

• South RG = 1455 SF
• North RG = 515 SF

Specifications:

• 12- inch max depth
• Weep hole drainage
• Cobble border
• Conform to existing flow path
• Cost 7-9 $/SF

Rain Gardens

Intro Design Deliverables Conclusions

Rain Garden Detail

• Currently, half the property is impervious and drains to the ravine.
• By rerouting the runoff of 0.86 ac of impervious surface to the

pond, flow velocities will be reduced and water quality improved.

Water Redirection

Intro Design Deliverables Conclusions

Source: Google

• Given the pipe redirection design, improvements to the detention

pond are necessary. A 100-foot bioswale of 0.50% slope is designed to extend the flow path in the pond.

Bioswale Flow Extension

Intro Design Deliverables Conclusions

Source: Soil Sciences of America

• Flow Path Extension: The detention pond ”short circuits” since

the outlet and inlet are 28 feet apart. A bioswale will extend this path to 200 feet to promote retention and infiltration.

Bioswale Flow Extension

Intro Design Deliverables Conclusions

Inlet – Outlet = 28 ft Inlet – Outlet = ~200 ft

• Pond Bottom Re-Grading: To accommodate the bioswale slope,

the pond will be excavated 3 inches and replanted with native plants to encourage infiltration.

Bioswale Flow Extension

Intro Design Deliverables Conclusions

16

Bioswale Flow Extension

• By city regulations, the current outlet does not have an appropriate

release rate. An 18-inch perforated riser was designed to release at the mandated 0.05 cfs/ac.

Outlet Structure

Intro Design Deliverables Conclusions

Existing: 6.5” Exposed Outlet PVC Pipe

Plan Set

Intro Design Deliverables Conclusions

Plan Set

Intro Design Deliverables Conclusions

EPA SWMM Model

Intro Design Deliverables Conclusions

EPA SWMM Model

Intro Design Deliverables Conclusions

Educational Model

Intro Design Deliverables Conclusions

▪ EPA SWMM model validation ▪ Lack of experience in creating a

complete construction plan set.

▪ Late and incomplete topo survey ▪ Communication between industrial

consultant and objectives

▪ Financial analysis (esp. construction)

Obstacles

Intro Design Deliverables Conclusions

Source: viewstorm.com

▪ Completion of a complete sheetset

to be revised and delivered for approval to MDEQ.

▪ Working hydrologic model of the

site with proposed changes.

▪ Educational tool for PCS.

Project Deliverables

Intro Design Deliverables Conclusions

▪ Importance of project definition ▪ Teamwork and time management ▪ Communication ▪ Responsible decision-making

Lessons Learned

Intro Design Deliverables Conclusions

Source: slidescarnival.com

Acknowledgements

• Julie Wildschut, P.E. (Plaster Creek Stewards)
• Ralph Reznick (MDEQ)
• Scott Gritter (Christ Church Liaison)
• Leonard De Rooy, P.E. (Team Advisor)
• Exxel Engineering (Topographical Survey)
• Lon Tiffany (Dan Vos Construction Company)
• Robert Hoeksema (Engineering Faculty)

Questions?