3/7/2013. Compliance & Sustainability

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Martha Wells
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Environmental Science & Engineering WMU Arcadia

Project Challenges Successful Outcomes K.

Environmental Engineering Manager bboyer@kieser

com March 7, 2013 City of Kalamazoo Kalamazoo

miles Lake Allegan 0 5 10 15 WMU Main Campus WMU

Subwatershed MICHIGAN Project Direction of Flow

Daily Load (TMDL) PROJECT AREA CWA Section 303d

amount of a pollutant that a water body can

standards Kzoo River/Lake Allegan TMDL (2001)

1 Overview associates.com Celebrating 20 Years of Excellence in Environmental Science & Engineering WMU Arcadia Creek Stormwater Treatment and Floodplain Enhancement Project DEQ # and Regulatory Setting Stormwater Goals and Funding Project Challenges Successful Outcomes K. Brian Boyer, P.E. Environmental Engineering Manager associates.com March 7, 2013 City of Kalamazoo Kalamazoo River Watershed 2,020 sq. miles Lake Allegan WMU Main Campus WMU SCALE (MILES) Portage & Arcadia Creek Subwatershed MICHIGAN Project Direction of Flow to the Kalamazoo River Project Site Arcadia Creek APPROX. SCALE (MILES) Regulatory Setting Total Maximum Daily Load (TMDL) PROJECT AREA CWA Section 303d requirement to list impaired waters Maximum amount of a pollutant that a water body can receive and still safely meet water quality standards Kzoo River/Lake Allegan TMDL (2001) for phosphorus (TP) TMDL Goal: 50% reduction of 1998 (baseline) TP load Municipal Separate Storm Sewer System (MS4) WMU voluntary stormwater permit 2000 WMU MS4 Watershed General Permit, issued December 23, 2003 Compliance & Sustainability 1

2 Project Goals 1. Reduce nonpoint source pollutant loads TMDL Compliance (50% reduction goal) TMDL Compliance Plan for campus footprint 2. Reduce peak flows, increase floodplain access 3. Restoration of eroding streambanks 4. Bioretention within restored floodplains 5. Increase groundwater recharge 6. Enhance habitat using native vegetation 7. Stormwater Neutral TM (net zero TP discharge) Campus wide sustainability Off campus Offsets Flooding (2008) Stadium Steps Flooding Flooding around Steam Pipes Waldo Stadium Flooding CMI Grant Funding CMI Grant Funding Grant Amount: $ 379,252 Match Funds: $ 168,937 Total Amount: $ 548, Fixed budget 2. Pre approved work scope NATIVE VEGETATION ARCADIA CREEK STORMWATER TREATMENT & INFILTRATION STREAMBANK RESTORATION STORMWATER OVERFLOW BYPASS STORMWATER DIVERSION ARCADIA CREEK CMI Grant Funding NATIVE VEGETATION OFF LINE FLOODPLAIN BIORETENTION STREAMBANK RESTORATION Project Challenges 1. Endangered species evaluation/assessment MDEQ MDOT (extra review/approval process was not anticipated) 2. MDOT right of way requirements Side slopes (at most 4:1 side slope adjacent to road) Water depth (at most 4 ft maximum water depth) Set back distance (min. 28 ft roadway clear zone) Road sub grade (min. 32 in dry sub grade depth) Fencing/guardrail (perimeter fencing, roadside guardrail, 840 ft) ~$25K to $30K DESIGN REVISIONS $$$ 2

(existing/proposed w/ photos) List of all assumptions and variables used in model Discussion of how starting conditions were assumed Discussion of how n values were estimated Discussion of how other

Review Fee $1,500 30 Days! Project Challenges 4. Inaccurate historic floodplain elevation data 1970s data 2010 survey data (1 ft contours) City of Kalamazoo to submit flood insurance map revisions 5.

3 Project Challenges 3. MDEQ Floodplain Permit APPLICATION CORRECTION REQUEST HEC RAS modeling, plan, profiles, cross sections ~$15K to $20K Topo contours no greater than 1 ft intervals River/overbank cross sections (existing/proposed w/ photos) List of all assumptions and variables used in model Discussion of how starting conditions were assumed Discussion of how n values were estimated Discussion of how other variables were estimated Calibration to existing Flood Insurance Study Depict proposed floodway, discuss determination methods Obtain a Letter of Map Revision (LOMR) from FEMA Add l File Fee $450 Review Fee $1, Days! Project Challenges 4. Inaccurate historic floodplain elevation data 1970s data 2010 survey data (1 ft contours) City of Kalamazoo to submit flood insurance map revisions 5. Revisions to maintain project objectives Layout and grading plan revisions (MDOT/ MDEQ concerns) 6. Cost concerns and project viability Do we still have a project? ADDITIONAL COSTS $42K to $52K 1. Endangered species evaluation/assessment Additional MDOT Review Resubmit MDEQ documentation, no additional information 2. MDOT right of way requirements Eliminate fencing, install used guardrail 3. MDEQ Floodplain Permit Application Correction Request Modeling alterna ve cross sectional increase demo Cross section all fill areas No decrease of floodplain cross sectional areas Provided 15 critical cross sections, with grading modifications Avg. Increase = 9.5% FILL Additional Net Increase 3.8 = Acre ft 8.18% CUT 4. Inaccurate historic floodplain elevation data Historic fill concerns Provide historic aerial photos (spanning ) Demonstrate no land/veg disturbance, age of existing trees Can rely on 2010 survey data (1 ft contours) 5. Revisions to maintain project objectives Substitute guardrail for plants/trees/plugs (seed only) On site, upland spoils placement (in lieu of hauling) USED GUARDRAIL $10,360 Savings ON SITE SPOILS $85,770 Savings 3

4 Stormwater Diversion Swale Expanded Floodplain Stormwater Diversion Swale Stormwater Treatment Infiltration Expanded Floodplain Stormwater Treatment Infiltration Expanded Floodplain Streambank Restoration Increase Floodplain Connectivity and Capacity 4

Increase Floodplain Connectivity and Capacity Bioretention &

1998 468.8 acres treated including BTR (blue areas) 59.

Provide treatment for first-flush stormwater runoff 120 ac-ft/yr

Restoration of disconnected floodplains bioretention 1 6 acres 1.

recharge 60 ac-ft/yr Enhanced habitat through use of native Michigan

5 acres Reduction of total phosphorus load to Arcadia Creek Reduction

Areas 27 tons/yr Description TMDL Compliance Stormwater NeutralTM (Net

(TP) Removal ($/lb) $5,460 Total Suspended Solids (TSS) Removal ($/ton)

5 Increase Floodplain Connectivity and Capacity Bioretention & Infiltration Removal of In stream Obstruction Improvement 15 BMPs since acres treated including BTR (blue areas) 59.8% of campus Quantification Redirect urban stormwater runoff 102 acres Provide treatment for first-flush stormwater runoff 120 ac-ft/yr Streambank restoration of eroding streambanks 268 ft p used for Restoration of disconnected floodplains bioretention 1 6 acres 1.6 Increased floodplain capacity 6,130 cyd Increased groundwater recharge 60 ac-ft/yr Enhanced habitat through use of native Michigan vegetation/seed mixes 3.5 acres Reduction of total phosphorus load to Arcadia Creek Reduction of sediment loading to Arcadia Creek 85 lbs/yr Off Campus Contributing Areas 27 tons/yr Description TMDL Compliance Stormwater NeutralTM (Net zero TP Runoff Volume Metric Construction ($) $235,000 Total Phosphorus (TP) Removal ($/lb) $5,460 Total Suspended Solids (TSS) Removal ($/ton) $19,580 discharge) Off Campus Offsets Stormwater Volume Treated ($/gal) $0 34 $0.34 Drainage Area Served ($/acre) $2,300 ENVIRONMENTAL METRICS = $$$ PRIORITIES FUTURE DECISION MAKING! 5

Concluding Remarks Floodplain enhancement / functionality Collaboration / negotiation Shared vision for improvement / outcomes Water quality goals

Kalamazoo MDOT Driesenga & Associates Hoffman Brothers, Inc. MDEQ Questions? Brian Boyer, P.E. Environmental Engineering Manager bboyer@kieser associates.

6 Concluding Remarks Floodplain enhancement / functionality Collaboration / negotiation Shared vision for improvement / outcomes Water quality goals / objectives Priorities (environmental benefits/metrics) PROJECT PARTNERS The FORUM of Greater Kalamazoo Western Michigan University City of Kalamazoo MDOT Driesenga & Associates Hoffman Brothers, Inc. MDEQ Questions? Brian Boyer, P.E. Environmental Engineering Manager bboyer@kieser associates.com (Copies of presentation are available) Celebrating 20 Years of Excellence in Environmental Science & Engineering associates.com 6

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