Fayetteville s Incorporation of Stormwater Management into the Person Street Streetscape Project

Transcription

1 Fayetteville s Incorporation of Stormwater Management into the Person Street Streetscape Project Giselle Rodriguez, PE; William Hunt, PhD, PE; Mark Senior, MS, PE

2 At a Glance About Person St Innovative Stormwater Greenscape Why Person St? Why a green street design? Water quality benefits Challenges along the way Funding Cost Opportunities Partnerships Update Encouragement

3 Approved CIP Recurring allocation Conventional streetscape project Background

4 Map of streetscapes

5 Downtown Today

6 Person Street: Existing Improvements Lane-narrowing Street trees Sidewalk paving

7 Aerial View Improved section Area in NEED

8 Person Street Blounts Creek Makeover Needed!!!

9 Project Limits Blounts Creek 1,500-foot corridor 1 st block: 3 lane section + 45-degree parking on each side 2 nd block: 5 lane section w/o parking

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11 Unique Attributes Major corridor to downtown Strategic Planning Downtown Beautification Urban area NO land acquisition Connection with multi-use trail system Great asset: stormwater runoff Sandy clay loam texture Seasonally high water table > 78 inches below pavement Low traffic Road diet candidate Gray to Green conversion

12 Quality control

13 Now what Gathering leftovers Telling the story Green street It comes down to money Funding strategy Support Moving forward Team set up Partnerships Construction began March 28,2016

14 Teamwork Engineering Division NC State Bio & Ag WK Dickson Grant and Greenroads Planning Urban Designer Construction Management Traffic Services Parks & Rec Utilities: PWC Electric & Water; PNG; Century Link; TWC

15 Innovative Stormwater Design 87 % of the roadway will be treated by volume control and filtration Permeable Interlocking Concrete Paver (PICP) Stalls Bio-infiltration Bump Outs Silva Cell Systems Filterra Infiltration can be accomplished because of soil drainage: Sandy clay loam texture 0.4 inches per hour saturated hydraulic conductivity

16 Proposed Street Corridor

17 Bio-infiltration Bump Outs

18 Person Green Street (Photos: NCSU BAE)

19 Person Green Street (Photos: NCSU BAE)

20 Suspended Pavement Systems Silva Cell suspended pavement systems Urban tree root growth and stormwater management Source(both images): DeepRoot

21 Source: Smiley et al

22 Person Street Silva Cells Person Green Street (Photos: NCSU BAE)

23 Person Street Silva Cells Person Green Street (Photos: NCSU BAE)

24 Permeable Interlocking Concrete Pavers 6 No. 2 aggregate 4 No. 57 aggregate 2 No. 8 aggregate Upturned elbow in some systems Color scheme to match existing Fay. renovation

25 Person Green Street (Photos: NCSU BAE)

26 Filterra High-flow surface runoff filter ( cm/h) Open-throat inlet ideal for curb flow Proprietary soil media with tree planter Courtesy: Contech Engineered Solutions

27 Person Green Street (Photos: NCSU BAE)

28 Green Street Construction Video by: Mitch Woodward, NC Cooperative Extension

29 Person Street Monitoring Catch Basins Drain more than 50% of retrofit Drainage Area: 5.5 ac - 75% Impervious North Suspended Pavement Drainage Area: 0.16 ac 100% Impervious Internal water storage zone 1400 ft 3 soil volume Two trees (willow oak)

30 Monitoring Pre-retrofit monitoring: Water quality (TSS, TN, TAN, NO 2/3 -N, TKN, TP, Ortho-P) Hydrology (flow, rainfall)

31 Pre-Retrofit Results Runoff Threshold Runoff Depth (in) Runoff Threshold: 0.07 in Average Runoff Depth: 0.14 in Precipitation (in) Average Concentrations of Pollutants Pollutants TKN NO 2-3 -N NH 3 -N TP TSS Concentration (mg/l)

32 Monitoring Post-retrofit monitoring: Continue sampling at catch basins, along with the inlets and underdrains of the suspended pavement systems

33 Estimated Construction Cost 63% Demolition/site work ( $570,566) 35% SCM s s & Landscaping ($316,313) 2% Road resurface ($21,450) $908,329 Utility work by utility providers Final asphalt layer by Resurfacing contract

34 Bid Comparison Cost Estimate Bid Item $510,725 $729,972 Site work $316,313 $451,844 SCM s $21,450 $22,000 Resurface $41,001 $72,457 $18,839 $49,320 Irrigation & Landscaping Pavement Marking $908,328 $1,325,593 Total 30% higher Advertised 5 times Lack of bids Innovative project Surcharged market Bond capacity Actual Cost: $1,390,000

35 Exclusive Rewards Connection with multi-use trail system Improve access and mobility Increase economic activity Enhanced downtown character Safer and more secure Greater community engagement Stormwater quality & quantity control Urban area exempt by current ordinances Impervious area reduction 30% Marketing opportunities for redevelopment

36 Exclusive Rewards Beautification Additional parking 28 existing parking spaces 42 proposed parking spaces LID encouragement Improve quality to an impaired stream Blounts Creek Research by NC State Bio & Ag Educational opportunity Greenroads Certification

37 What if Conventional Streetscape Project Cost saving $200,000 Impervious area increase 15,903 sf Peak flow increase Increased volume Less shade, higher temperature runoff No nutrients removal

38 Why Bother??? Can you get a water quality project with similar rewards for $300,000??? The real trade-offs are not easily monetized. No training will provide such an educational opportunity. No encouragement is greater than doing it yourself. Commitment as stewards of our environment: time to give back. Improve environmental resiliency. Enjoy ecosystem services. The right thing to do!!!

39 Public Meeting Downtown Alliance LID Summit LID Conference Texas PENC Fort Bragg Lunch & Learn Methodist Before During After Monitoring by NC State Before/after comparison Eyes on Fayetteville

40 Not all in favor Fire Police Business Owner Bid Process Strategy change Higher cost Multiple Accounts Grant schedule Hurricane Matthew Retrofits needed Challenges

41 What Worked Well Incorporate Greenroads requirements into contract with incentive built in 2 inspectors on the job Roadway inspector Stormwater inspector Weekly meetings Team effort

42 Cleanwater Management Trust Fund Grant Fayetteville Teamed with WK Dickson to prepare Innovative (Green Infrastructure) Stormwater Grant application Based on a successful application, were awarded a $309,500 grant for installation of the SCM s Largest of 3 out of 11 to receive a non-provisional award that year Fayetteville would cover the cost of the design ($37,677) and pre& post construction monitoring ($174,677)

43 Greenroads Certification Greenroads is a third-party rating system based on environmental, economic and social performance criteria. Greenroads is similar to LEED or Green Globes, but is designed specifically for roadway and transit infrastructure projects.

44 Greenroads Program Greenroads Foundation is a non-profit organization that oversees the certification reviews and education for Greenroads. Original Developers: University of Washington & CH2M Hill 5 years, 120+ project, 11 states, 8 Countries

45 Greenroads Requirements Each sustainable practice is assigned a point value according to its lifecycle impact on a transportation project. Two types of credits: Mandatory (all projects must do them and these credits do not earn points) voluntary (teams elect which to pursue and earn points) Voluntary credits track a variety of economic, social and environmental measures against specific performance targets

46 Greenroads Requirements Mandatory credits form the baseline for a transportation project to be considered green. The Project Requirements span all parts of a project lifecycle from early environmental planning, social and community decision-making, economic considerations, construction planning and operational management.

47 Greenroads Requirements

48 Greenroads Requirements Greenroads also includes 45 voluntary credits arranged in 5 Core areas Each of these Core Credits is worth 1 to 5 points. The five categories are: Environment & Water Construction Activities Materials & Design Utilities & Controls Access & Livability Creativity & Effort prioritization of local values, accredited and educated professionals on the team, enhanced performance beyond minimums and new ideas not included in the Rating System.

49 Greenroads Requirements

50 Greenroads Requirements

51 Greenroads Requirements

52 Greenroads Requirements

53 Greenroads Requirements The total points achieved are added together to give a final Greenroads score. The more points, the higher the certification level. Currently, there are four Certification levels: Bronze (40 points minimum), Silver (50 points minimum), Gold (60 points minimum), and Evergreen (80 points minimum)

54 Greenroads Requirements Due to a late start entering into the Greenroads program (after planning and design completed) obtaining certification was questionable Ultimately was awarded 45 points for a Bronze Certification Had LED lighting not been delayed, a Silver Certification would have been possible

55 Greenroads Observations Great program to help guide you to do what you should be doing anyway Not expensive to enlist in program ($2,000) Challenging and time consuming to navigate the requirements and provide documentation Need buy in from staff and contractor up front Need to pursue documentation from contractor from day 1

56 BEFORE AFTER

57 BEFORE AFTER

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59 AFTER

60 Lessons Learned Need for a purpose Everybody understands goals Stormwater runoff as asset Buy-in Change mind set mud holes in R/W Stakeholders Retrofit utility conflicts Contractor focused on completion not documentation Cumbersome for Greenroads To be learned Maintenance Train staff

61 Why should I adopt LID? It's the action, not the fruit of the action, that's important. You have to do the right thing. It may not be in your power, may not be in your time, that there'll be any fruit. But that doesn't mean you stop doing the right thing. You may never know what results come from your action. But if you do nothing, there will be no result. Mahatma Gandhi

62 Why should I adopt LID? It's the action, not the fruit of the action, that's important. You have to do the right thing. It may not be in your power, may not be in your time, that there'll be any fruit. But that doesn't mean you stop doing the right thing. You may never know what results come from your action. But if you do nothing, there will be no result. Mahatma Gandhi

63 Giselle Rodriguez, PE City Engineer (910)