Storm Water Improvements Project Phasing Analysis February 27, 2018

Tonight’s Presentati tion • Public education campaign update • MWRD grant application • Financial update • Stormwater project phasing options (Stantec presentation)

Public Education Campaign • To date, the following has been accomplished: • www.wilmettestormwater.com • Mindmixer online community engagement platform • Open House (February 8 th ) • 4-page direct mailing sent to all Wilmette addresses • Communicator insert • Online estimated bill payment calculator • Trustees have been receiving regular updates transmitting resident communications received via the website, email, and open house • The following tasks are in process: • Public education video • Open House (March 13 th from 4pm – 7pm) • Final mailing in advance of April 17 th Special Village Board meeting

MWRD RD Gr Grant Application on • Last week, Village Staff submitted a grant application to MWRD for the Sewer Expansion project • The application was prepared by Village Staff and technical reviews were conducted by both Christopher Burke Engineering and Stantec • The application requested $22 million for Phase I of the Lake Avenue sewer trunk line, and indicated there would be additional requests in years 2019 and beyond • MWRD considers the Village’s project “shovel ready” • Additional grant monies are expected to be available in future years

Storm Water Managem emen ent Proj ojec ect A Alternatives es The three projects under consideration by the Village include: 1. Sewer Expansion ( $80M - $95M) • Construction of 8 miles of new relief storm sewer 2. Reduced Sewer Expansion + Neighborhood Storage ($70M - $80M) • Reduced conveyance plus neighborhood storage in Kenilworth Gardens 3. Neighborhood Storage ($48M - $55M) • Neighborhood storage at Thornwood Park, Centennial Park, and the Community Rec Center 5

Financ ncing • On November 27, 2017 Staff made a 23 slide presentation regarding the potential financing of these projects, including a slide on how the sewer fee would incrementally increase over time • Feedback from the open house indicates that the sewer fee increases should be discussed in more detail • Accordingly, the following 4 slides have been prepared to better inform the community and Village Board of the sewer bill impact over time assuming each project is constructed without phasing • For example, the first year median sewer bill increase is estimated to be $63 - $105 depending on the project selected

Estimated Water/Sewer Bill Impact Over Time $800 +$21 +$420 +$21 +$21 $750 +$21 +$357 +$63 +$42 $700 +$42 $650 +$84 +$42 +$34 +$244 $600 +$63 +$21 +$84 +$21 $550 +$21 +$63 $500 +$105 +$84 $450 +$63 $400 $350 $356 $300 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 Sewer Expansion Hybrid Neighborhood Storage Note: The Village’s financial advisor prepared projected annual level debt service expenditures for each of the projects under consideration (in 2017 dollars utilizing the high-end construction cost estimates), using a 4.0% interest rate and maintenance of the Village’s Aaa bond rating. Assumes median annual usage of 84 units.

Neighbor orhood od S Stor orage Estimate ted Sewer er B Bill I Impact ct Median Annual Cumulative Year Increase Increase 2021 $ 63 $ 63 2022 84 147 2027 21 168 2029 21 189 2030 21 210 2038 34 244

Sewer E Expansion + Neighborho hood S Storage Estimated Sewer B r Bill I Impact Median Annual Cumulative Year Increase Increase 2021 $ 105 $ 105 2022 63 168 2023 63 231 2026 42 273 2030 42 315 2038 42 357

Sewer E Expansion Es Estimated Sewer r Bill Impact Median Annual Cumulative Year Increase Increase 2021 $ 105 $ 105 2022 84 189 2023 84 273 2026 63 336 2029 21 357 2031 21 378 2038 21 399 2040 21 420

Proj oject ected ed F Future C e Cost o of Vi Village S Servi vices ces • The following table projects the cost of Village services over time • Note that unanticipated expenses, state and federal mandates, weather, and performance of the economy will change these figures over time $4,500 Existing Cost of Village Services: $2,574 + $2,455 Cost of Services in 30 Years: $5,651 $4,000 + 143% Cost of Services in 30 Years + $3,500 Storm Water Improvements: $5,895 - $6,071 $3,000 $2,500 $2,000 + $244 + $307 + $357 + $420 + $315 $1,500 + 69% + 110% + 100% + 118% + 143% $1,000 $500 $- Property Tax Bill (3% annual inc.) Water Bill (3% annual inc.) Refuse Fee (2.5% annual inc.) Sewer Bill w/ Neighborhood Storage Sewer Bill w/ Hybrid Option ($80M) Sewer Bill w/ Relief Sewer ($95M) ($55M) 2017 2040 11

1 Se par ate Stor m Se we r Syste m Study – Phasing Analysis Village of Wilme tte , Illinois F e b rua ry 27, 2018

2 Pha sing Ana lysis Ob je c tive Unde r stand how pr oje c t phasing c an impac t: • Pr oje c t c osts • T ime to de live r be ne fits

3 Pha sing Ana lysis Appro a c h Co nstruc tio n I mple me nta tio n Pha sing I mpa c ts Pa c ka g e s Sc he dule

Co nstruc tio n Pa c ka g e s

5 De finitio n o f Co nstruc tio n Pa c ka g e s F ac tor s Conside r e d Note s Co nstruc tio n Co ntra c t Va lue $10 millio n - $25 millio n swe e t spo t fo r ma jo r c ivil c o nstruc tio n L o g ic a l Co nstruc tio n Bre a kpo ints Cha ng e s in re lie f se we r a lig nme nt o r dia me te r Cha ng e s in Co nstruc tio n Ac tivitie s Size o f pipe a nd struc ture s; Ope n c ut vs tunne l c o nstruc tio n Po te ntia l fo r De live ring Be ne fits Co mple te c o mpo ne nts tha t pro duc e b e ne fits Co nstruc tio n I mpa c t Ma na g e me nt E va lua tio n o f c o nc urre nt disruptio n o f stre e ts, pa rks

6 Pha sing Co nside ra tio n Re duc e d Ma ximize e a rly b e ne fits Pha se 1 F lo o d Risk Orde r pha se s to b uild Pha se 1 Pha se 2 Pha se 3 upo n o ne a no the r

7 E xisting Co nditio ns – 10-yr Sto rm

8 Se we r E xpa nsio n Pha sing Ana lysis $14.0 Million $17.9 Million $19.8 Million $20.6 Million $12.1 Million Constr uc tion Cost E ngine e r ing De sign & T otal Pr oje c t Costs (inc l. c ontinge nc y) Constr uc tion Se r vic e s Cost $84.4 Millio n $10.1 Millio n $94.5 Millio n

9 Se we r E xpa nsio n Plus Ne ig hb o rho o d Sto ra g e Pha sing Ana lysis $17.0 Million $20.2 Million $8.5 Million $13.6 Million $8.5 Million Constr uc tion Cost E ngine e r ing De sign & T otal Pr oje c t Costs (inc l. c ontinge nc y) Constr uc tion Se r vic e s Cost $67.8 Millio n $8.1 Millio n $75.9 Millio n

10 Ne ig hb o rho o d Sto ra g e Pha sing Ana lysis $17.0 Million $5.0 Million $13.2 Million $12.4 Million Constr uc tion Cost E ngine e r ing De sign & T otal Pr oje c t Costs (inc l. c ontinge nc y) Constr uc tion Se r vic e s Cost $47.6 Millio n $5.7 Millio n $53.3 Millio n

I mple me nta tio n Sc he dule

12 I mple me nta tio n Sc he dule s • T ime line Options • No Pha sing • 10- ye a r Imple me nta tion Sc he dule • 20- ye a r Imple me nta tion Sc he dule

13 Co st Allo c a tio n Ove r T ime Se we r E xpansion Option, 10- ye ar Sc he dule

14 I nfla tio n Co st Summa ry a ssume d to b e 3% pe r ye a r Se we r E xpansion Option, 10- ye ar Sc he dule

I mple me nta tio n Sc he dule

16 Pha sing Ana lysis Re sults

Re fe re nc e Ma te ria ls

26 Se we r E xpa nsio n Optio n -10-yr Sto rm Re d uc tio n in 95% (10-yr) Vulne ra b le Struc ture s 36% (100-yr) Pro je c t Co st (2017 do lla rs) $80 - $95 millio n

27 Se we r E xpa nsio n plus Ne ig hb o rho o d Sto ra g e – 10-yr Sto rm Re d uc tio n in 81% (10-yr) Vulne ra b le Struc ture s 35% (100-yr) Pro je c t Co st (2017 do lla rs) $70 - $80 millio n

28 Ne ig hb o rho o d Sto ra g e Optio n – 10-yr Sto rm Re d uc tio n in 71% (10-yr) Vulne ra b le Struc ture s 12% (100-yr) Pro je c t Co st (2017 do lla rs) $48 - $55 millio n

29 Alte rna tive Co mpa riso n Se we r Se we r E xpansion + Ne ighbor hood Me tr ic E xpansion Ne ighbor hood Stor age Stor age Study Are a s Se rve d 14/ 14 10/ 14 11/ 14 Vulne ra b le Str e s Pro te c te d uc tur - 10-yr Sto rm (10% Annua l Risk) 95% 81% 71% - 100-yr Sto rm (1% Annua l Risk) 36% 35% 12% Vulne ra b le Pr tie s Pro te c te d ope r - 10-yr Sto rm (10% Annua l Risk) 97% 79% 67% - 100-yr Sto rm (1% Annua l Risk) 21% 22% 6% T o ta l Pro je c t Co st Ra ng e $80 - $95 $70 - $80 $48 - $55 (millio ns o f 2017 Do lla rs) Disruptio n - Pa rks 0 1 3 Pha sing F le xib ility L imite d Mo de ra te Sig nific a nt

Storm Water Improvements Project Phasing Analysis February 27, 2018 - PowerPoint PPT Presentation

Storm Water Improvements Project Phasing Analysis February 27, 2018 Tonights Presentati tion Public education campaign update MWRD grant application Financial update Stormwater project phasing options (Stantec presentation)

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