MoDNR Order to City of Columbia regarding sewer/basement backups, 8/2011

8/14/2019 MoDNR Order to City of Columbia regarding sewer/basement backups, 8/2011

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City of Columbia

Sewer UtilityCity Council Worksession

November 2011

1

Abatement Order on Consent


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Why an AOC?

1/25/2011 C

2

2010.


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18, 2010 C

A

3

2.5 25.

, C $600,000 . $120,000 .


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2002 1,294

138

4

390

766

.


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. . A 4, 2011 . A 4, 2011 .

A A

5

.. 23 . 23 .

, ,

$1,200,000 .$1,200,000 .


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.

2007

6

. , ,

7,000

2001 2005,

, , ,

.


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2002 409

241

168

7

.


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FY YearFY Year Precipitation / inPrecipitation / in SSOSSO FY YearFY Year Precipitation / inPrecipitation / in SSOSSO

20112011 3333 1313 19931993 3838 11

20102010 5353 117117 19921992 6262 00

20092009 5252 3030 19911991 3434 00

20082008 6060 3838 19901990 3535 1120072007 3838 00 19891989 5454 00

20062006 3030 00 19881988 3535 00

20052005 4040 00 19871987 3131 00

8

20042004 4747 55 19861986 3434 1120032003 4141 00 19851985 4242 00

20022002 4242 00 19841984 5555 00

20012001 4444 55 19831983 5151 00

20002000 4141 22 19821982 4646 0019991999 4040 33 19811981 4848 44

19981998 3030 00 19801980 4949 00

19971997 4545 11 19791979 2424 00

19961996 3737 22 19781978 3232 00

19951995 4040 11 19771977 3838 44


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1/25/2011 C

2010.

9

.

2/11/2011 C

A 7.


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4/13/2011, C AC

. 5/12/2011 C

. C 6/8/2011.

7/14/2011, C AC

10

. .

8/16/2011, C AC

. C 8/24/2011. 8/29/2011, C AC

.


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, B B B

180

180 .

11

C, , (C)

180

24

A . 1


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& B 12/31/2021, C & B 12/31/2021, C &

18 . 18 . 50% & 1 50% & 1

12

..

B 12/31/2026, C & B 12/31/2026, C &

25 . 25 .

80% & 1 80% & 1 ..


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13


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. .

2011 1

2012 2, 3 & 4 1

2013 4, 5 & 6 2, 3 & 4 1

2014 7 & 8 4, 5 & 6 2, 3 & 4

2015 9, 10 &11 7 & 8 4, 5 & 6

2016 12, 13 & 14 9, 10 &11 7 & 8

14

, , , ,

2018 19 & 20 15, 16, 17 & 18 12, 13 & 14

2019 21 & 22 19 & 20 15, 16, 17 & 18

2020 23, 24 & 25 21 & 22 19 & 20

2021 3121 23, 24 & 25 21 & 22

2022 23, 24 & 25

2023

2024

20252026 3126


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B

C

&

C

, &

C

C B B

2011 $400,000 $400,000 $3,000,000 08 2012 $700,000 $400,000 $1,500,000 $2,600,000

2013 $750,000 $1,000,000 $4,000,000 $5,750,000

15

$29,800,000 A12

, , , , , , ,

2015 $700,000 $700,000 $4,500,000 $5,900,000

2016 $600,000 $950,000 $4,500,000 $6,050,000

2017 $700,000 $750,000 $4,000,000 $5,450,000

2018 $550,000 $850,000 $5,000,000 $6,400,000

$24,150,000 A172019 $600,000 $550,000 $4,000,000 $5,150,000

2020 $900,000 $700,000 $4,000,000 $5,600,000

2021 $1,000,000 $6,000,000 $7,000,000

$6,550,000 $7,900,000 $42,500,000 $56,950,000


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Estimated Rate Impact

YearYear % INCREASE% INCREASE AVG. RES. COSTAVG. RES. COST

2009 2009 15%15% 2008 2008 $13.66$13.66

2010 2010 15%15% 2008 2008 $15.72$15.72

2011 2011 15%15% 2008 2008 $18.07$18.07

16

2012 2012 15%15% 2008 2008 $20.38$20.38 2013 2013 8%8% 2008 2008 $22.01$22.01

2014 2014 18%18% & & $25.97$25.97

2015 2015 10%10% & & $28.57$28.57

2016 2016 5%5% & & $30.00$30.00

2017 2017 4%4% & & $31.20$31.20


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$74,000,000$74,000,000

C 1C 1 $26,000,000$26,000,000C 2C 2 $27,000,000$27,000,000

C 3C 3 $21,000,000$21,000,000

17

C C 20,000,00020,000,000 $29,000,000$29,000,000

$123,000,000 $123,000,0002004 2004


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18


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How it gets into the systemHow it gets into the system

Public SectorPublic Sector Private SectorPrivate Sector

19


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I & II & I What is it?What is it? InflowInflow surface water which enters the sewersurface water which enters the sewer

through direct connections such as down spouts,through direct connections such as down spouts,sump pumps, area drains, cross connections withsump pumps, area drains, cross connections withstorm sewers, etc.storm sewers, etc.

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InfiltrationInfiltration groundwater that seeps into sewersgroundwater that seeps into sewersthrough sewer pipe and manhole defects such asthrough sewer pipe and manhole defects such ascracks, broken pipe joints, bad servicecracks, broken pipe joints, bad service

connections, manhole defects, etc.connections, manhole defects, etc.

Documents

MoDNR Order to City of Columbia regarding sewer/basement backups, 8/2011