Platte to Park Hill: Stormwater Systems · • Project Need • Open Channel • Detention Options...

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