Platte to Park Hill: Stormwater Systems March 2016
Topics • Project Need • Open Channel • Detention Options (Cole, City Park Golf Course) • Park Hill Detention • Globeville Landing Outfall • Funding, Timing & Next Steps
PROJECT NEED
Project Need 36 th & High, 2011
Natural Drainage Patterns
Existing Pipes 7
Priority Areas 8
Priority Areas 9
Open Drainage Channel 10
Example: Harvard Gulch
Basin Low Areas 12
Detention Option 1: Cole
Example: Crestmoor Park
Detention Option 2: City Park Golf Course
Example: Lakewood Golf Course
City Park Golf Course: Feasibility Study Option 1 PAR Hole 1 2 3 4 5 6 7 8 9 Total 10 11 12 13 14 15 16 17 18 Total 72 Par 4 4 5 3 4 4 3 4 4 35 5 5 3 4 4 4 3 5 4 37 DRAFT
City Park Golf Course: Feasibility Study Option 1
City Park Golf Course: Feasibility Study Option 1 5-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 1 10-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 1 100-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 2 PAR Hole 1 2 3 4 5 6 7 8 9 Total 10 11 12 13 14 15 16 17 18 Total 70 Par 4 4 3 4 4 3 5 3 5 35 4 3 4 4 4 5 4 3 4 35 DRAFT
City Park Golf Course: Feasibility Study Option 2
City Park Golf Course: Feasibility Study Option 2 5-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 2 10-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 2 100-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 3 PAR Hole 1 2 3 4 5 6 7 8 9 Total 10 11 12 13 14 15 16 17 18 Total 70 Par 4 4 4 4 3 5 3 4 4 35 4 4 3 4 5 4 4 3 4 35 DRAFT
City Park Golf Course: Feasibility Study Option 3
City Park Golf Course: Feasibility Study Option 3 5-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 3 10-year storm (DRAFT)
City Park Golf Course: Feasibility Study Option 3 100-year storm (DRAFT)
Tree Impacts: Option 1 DRAFT 153 trees impacted out of 872 Of the trees impacted, 47% of them are under 12” diameter and 5% of them are 36”+ diameter
Tree Impacts: Option 2 DRAFT 280 trees impacted out of 872 Of the trees impacted, 49% of them are under 12” diameter and 4% of them are 36”+ diameter
Tree Impacts: Option 3 DRAFT 246 trees impacted out of 872 Of the trees impacted, 49% of them are under 12” diameter and 5% of them are 36”+ diameter
Two Detention Location Options Cole Detention City Park Golf Course Detention
Areas of Reduced Flooding
PARK HILL BASIN
Park Hill Detention 38
Park Hill Detention 39
Alternative Pipe Alignments 40
GLOBEVILLE LANDING OUTFALL
Globeville Landing Outfall 42
Globeville Landing Outfall • New outfall New (with existing) Outfall • Natural open channel • Incorporating water quality • Opportunity to Existing re-envision park Outfall and uses
FUNDING, TIMING & NEXT STEPS
Funding for Citywide Stormwater Projects • Denver pays for stormwater and drainage projects through wastewater fees and through partnerships when feasible • Four types of stormwater projects: – Citywide storm improvements – Major basin projects – Urban waterways (gulches) – Water quality • Over the last 20 years, Denver has only had 2 stormwater rate increases • City Council is scheduled to hear full proposal for rate increase in spring 2016
Funding for Platte to Park Hill • Platte to Park Hill: Stormwater Systems will be one of many projects paid for through wastewater fees • Other funding partners may include: – Urban Drainage and Flood Control District – CDOT – RTD
Overall Timeline Fall/ Winter 2015 Spring 2016 Summer/Fall 2016 Late 2016 2017 2018 2019 Globeville Landing Outfall Conceptual Planning and Preliminary Design Montclair/Park Hill Basin Conceptual Planning Montclair/Park Hill Preliminary Design Globeville Landing Outfall Construction Montclair/Park Hill Basin Construction Globeville Montclair/Park Landing Outfall Hill Basin operational operational
Preliminary Construction Timeline • Globeville Landing Outfall construction – Begin 2016, complete by 2017 • Open Channel – Begin 2017, complete by 2018 • Cole or City Park Golf Course Detention construction – Begin 2017, complete by 2018 • Park Hill Detention & Pipe construction – Begin 2018, complete 2019
Next Steps • Extending the public comment window • Ramping up community outreach between now and the selection of the preferred option o Project updates, website, small community meetings • Further refinement of the draft options based on additional input • Announcement of preferred option in early April
INFORMATION ADDITIONAL
2014 Storm Drainage Master Plan • Citywide planning tool that identifies basic stormwater needs • Master Plan identifies and prioritizes projects, which consist of pipes that meet 5-year storm criteria • Platte to Park Hill was not included in the master plan because it solves the 100-year event • Modeling for Platte to Park Hill area indicated a need to consider higher level of criteria (100-year) due to high flood risk
Thank You Visit the project website at: http://denvergov.org/PlattetoParkHill
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