Hovedplan Avløp 2012-2021

Hovedplan Avløp 2012-2021

Enebakk kommune Driftsenheten Hovedplan Avløp 2012-2021 A009491 2011 – 11 – 15 Innholdsfortegnelse Side 1 INNLEDNING .............................................................................................................................................. 4 1.1 BAKGRUNN ............................................................................................................................................. 4 1.2 HENSIKT ................................................................................................................................................. 4 1.3 PLANPERSPEKTIV .................................................................................................................................... 5 1.4 OMFANG ................................................................................................................................................. 5 1.5 DIREKTIV ................................................................................................................................................ 5 2 OVERSIKT ................................................................................................................................................... 5 3 DIMENSJONERINGSGRUNNLAG .......................................................................................................... 6 3.1 BEFOLKNINGSUTVIKLING ....................................................................................................................... 6 3.2 AREALPLAN ............................................................................................................................................ 6 4 NEDBØR ....................................................................................................................................................... 7 5 MÅLBESKRIVELSE ................................................................................................................................... 8 5.1 INNLEDNING ........................................................................................................................................... 8 5.2 MÅLOMRÅDER ........................................................................................................................................ 8 5.3 DELMÅL ................................................................................................................................................. 8 6 VANNMILJØ ................................................................................................................................................ 9 6.1 GENERELT .............................................................................................................................................. 9 6.2 VASSDRAGSKONTROLL ......................................................................................................................... 10 6.3 KLASSIFISERING ................................................................................................................................... 11 6.4 MÅL...................................................................................................................................................... 11 6.5 STATUS ................................................................................................................................................. 12 6.5.1 Generelt ........................................................................................................................................... 12 6.5.2 Langenvassdraget ............................................................................................................................ 12 6.5.3 Lysernvassdraget ............................................................................................................................. 13 6.6 BØRTERVASDRAGET ............................................................................................................................. 14 6.7 BEKKER VED FLATEBY - DRENERING TIL ØYEREN ................................................................................ 15 6.8 OPPSUMMERING VANNKVALITET .......................................................................................................... 15 7 INNLEKKING I AVLØPSNETTET. UTSLIPP FRA OVERLØP ........................................................ 15 7.1 GENERELT ............................................................................................................................................ 15 7.2 AVLØPSMENGDER I 2010 ...................................................................................................................... 15 7.3 SAMMENLIGNING AV AVLØPSMENGDER I 2009 OG 2010 ....................................................................... 16 7.4 FORURENSNING I OVERLØP ................................................................................................................... 17 8 KONTROLLSYSTEM FOR INNLEKKING I SPILLVANNSNETTET ............................................. 17 9 PÅSLIPPSTILLATELSER ....................................................................................................................... 17 10 FORURENSNINGSREGNSKAP .............................................................................................................. 17 11 BESKRIVELSE AV EKSISTERENDE AVLØPSNETT........................................................................ 18 11.1 RENSEDISTRIKT .................................................................................................................................... 18 11.2 DATA FOR LEDNINGSNETTET ................................................................................................................ 19 11.2.1 Generelt ....................................................................................................................................... 19 11.2.2 Pumpestasjonene ......................................................................................................................... 19 11.2.3 Ledningsnettets lengde, materiale og leggeår ............................................................................. 20 11.3 SPILLVANNSMENGDER .......................................................................................................................... 22 11.3.1 Generelt ....................................................................................................................................... 22 A009491 Side 1 av 32 11.3.2 Ytre Enebakk ............................................................................................................................... 22 11.3.3 Kirkebygda .................................................................................................................................. 23 11.3.4 Flateby ........................................................................................................................................ 23 12 TILTAK ....................................................................................................................................................... 23 12.1 GENERELT ............................................................................................................................................ 23 12.2 NYTT RENSEANLEGG BARBØL .............................................................................................................. 25 12.3 UTVIDELSE AV RA FLATEBY ................................................................................................................ 25 12.4 REHABILITERING AV PUMPESTASJONER ................................................................................................ 25 12.5 REHABILITERING AV AVLØPSNETTET .................................................................................................... 26 12.6 OVERVANNSHÅNDTERING .................................................................................................................... 26 12.7 NYE ANLEGG FOR Å IVARETA UTBYGGING ............................................................................................ 27 12.8 OPPDATERING AV LEDNINGSKARTDATABASEN ..................................................................................... 27 12.9 FØLGE OPP VANNKVALITETEN I RESIPIENTENE ..................................................................................... 27 12.10 DRIFTSKONTROLL - AVLØPSNETTET ................................................................................................. 28 12.11 KONTROLL AV PRIVATE ANLEGG ...................................................................................................... 28 12.12 INNKJØP AV UTSTYR ......................................................................................................................... 28 12.13 REPARASJONER, UNDERSØKELSER ................................................................................................... 28 12.14 TØMMING AV SLUK .......................................................................................................................... 28 12.15 SAMMENSTILLING AV KOSTNADER ................................................................................................... 28 13 GEBYRBEREGNING ................................................................................................................................ 30 13.1 GENERELT ............................................................................................................................................ 30 13.2 FORDELING AV KOSTNADER PÅ INVESTERING OG VEDLIKEHOLD

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