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Platte to Park Hill: Stormwater Systems
March 2016
• Project Need• Open Channel• Detention Options (Cole, City Park Golf Course)• Park Hill Detention• Globeville Landing Outfall• Funding, Timing & Next Steps
Topics
PROJECT NEED
36th & High, 2011
Project Need
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
Hole 1 2 3 4 5 6 7 8 9 Total 10 11 12 13 14 15 16 17 18 TotalPar 4 4 5 3 4 4 3 4 4 35 5 5 3 4 4 4 3 5 4 37
PAR72
City Park Golf Course:Feasibility Study Option 1
DRAFT
City Park Golf Course:Feasibility Study Option 1
5-year storm (DRAFT)
City Park Golf Course:Feasibility Study Option 1
City Park Golf Course:Feasibility Study Option 1
10-year storm (DRAFT)
City Park Golf Course:Feasibility Study Option 1
100-year storm (DRAFT)
Hole 1 2 3 4 5 6 7 8 9 Total 10 11 12 13 14 15 16 17 18 TotalPar 4 4 3 4 4 3 5 3 5 35 4 3 4 4 4 5 4 3 4 35
PAR70
City Park Golf Course:Feasibility Study Option 2
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)
Hole 1 2 3 4 5 6 7 8 9 Total 10 11 12 13 14 15 16 17 18 TotalPar 4 4 4 4 3 5 3 4 4 35 4 4 3 4 5 4 4 3 4 35
PAR70
City Park Golf Course:Feasibility Study Option 3
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)
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 1
DRAFT
Tree Impacts: Option 2
280 trees impacted out of 872
Of the trees impacted, 49% of them are under 12” diameter and 4% of them are 36”+ diameter
DRAFT
Tree Impacts: Option 3
246 trees impacted out of 872
Of the trees impacted, 49% of them are under 12” diameter and 5% of them are 36”+ diameter
DRAFT
Cole Detention City Park Golf Course Detention
Two Detention Location Options
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 (with existing)
• Natural open channel
• Incorporating water quality
• Opportunity to re-envision park and uses
Existing Outfall
New Outfall
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
Montclair/Park Hill Basin Conceptual Planning
Montclair/Park Hill Preliminary Design
Montclair/Park Hill Basin operational
Globeville Landing Outfall Construction
Montclair/Park Hill Basin Construction
Globeville Landing Outfall operational
Globeville Landing Outfall Conceptual Planning and Preliminary Design
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 optiono Project updates, website, small community
meetings
• Further refinement of the draft options based on additional input
• Announcement of preferred option in early April
ADDITIONALINFORMATION
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 YouVisit the project website at:
http://denvergov.org/PlattetoParkHill