ATTACHMENT 4 Upper Flint River Basin Profile

Transcription

1 ATTACHMENT 4 Uppe Flint Rive Bsin Pofile The Uppe Flint Rive Bsin is locted in the southen section of the Meto Wte Distict nd encompsses bout 556 sque miles of the Meto Wte Distict, o 11 pecent of its totl e. This lso epesents 21 pecent of the ovell Uppe Flint Rive (Hydologic Unit Code) HUC-8 Bsin, which extends downstem to Mcon County in southen Geogi. Potions of 25 cities nd 5 counties e within the Distict potion of the Uppe Flint Rive Bsin including Fulton, Clyton, Fyette, Cowet nd Heny Counties (Figue UF-1). Lge cities include College P, Fibun, Fyetteville, Newnn, Pechtee City, Rivedle, Tyone nd Union City. Physicl nd Ntul Fetues Geogphy The Uppe Flint Rive Bsin lies entiely within the Piedmont povince nd includes only the Geenville Slope distict. It is chcteized by olling topogphy tht deceses gdully in elevtion fom bout 1,000 feet in the nothest to 600 feet in the southwest. Those flowing to the southwest occupy shllow, open vlleys with bod, ounded divides while those flowing to the southest occupy nowe, deepe vlleys with now, ounded divides (Cl nd Zis, 1976). The Flint Rive is entiely within the Piedmont povince, which consists of seies of olling hills nd occsionl isolted mountins. The Uppe Flint Rive Bsin includes potions of the Ginesville Ridge, Geenville Slope, Wshington Slope nd Winde Slope physiogphic disticts (Meto Wte Distict, 2002). Hydology nd Soils The Uppe Flint Rive Bsin oigintes in Atlnt nd dins to ll of Fyette County nd potions of Clyton, Cowet, Dougls nd Heny Counties. It eventully dins to the Gulf of Mexico t Aplchicol By in Floid. It is compised of one 8-digit HUC, thee 10-digit HUCs nd nineteen 12-digit HUCs, nd its min tibuties e Line, Moning, White O nd Whitewte ees. Of the ppoximtely 240 miles of ssessed wtes in the Uppe Flint Rive Bsin, 17 pecent e designted solely fo dining wte, 18 pecent fo dining wte nd fishing with the emining 64 pecent designted fo fishing (Figue UF-2). Stem dischges fo the Flint Rive nd its tibuties e ecoded by the USGS sttion , the Flint Rive ne Giffin. Annul flows nge fom low of 9.2 cubic feet pe second (cfs) to high of 3,150 cfs, with men of 290 cfs (USGS, 2015). The existing esevois in the Uppe Flint Rive Bsin e pimily smlle impoundments on tibuties to the Flint Rive tht wee developed fo dining wte supply. An ssessment of the vilbility of goundwte esouces in select pioitized quifes of Geogi ws completed s pt of Geogi's Compehensive Stte-wide Wte Mngement Pln (Geogi EPD, 2010). While none of the Uppe Flint Rive Bsin within the Meto Wte Distict ws selected s pioity quife fo ssessment, the etceous Aquife in Geogi's Costl Plin includes the southen tip of the Uppe Flint Rive HUC-8 wteshed below the fll line. The quifes in the Piedmont povince e in cystlline ocs tht cop out in the nothen potion of the bsin nd extend to the fll line. The oc is ovelin with deposits of wetheed, unconsolidted oc debis (egolith) tht me up the vilble quife spces. These deposits e thicest in vlleys, but genelly povide insufficient yield fo uses othe thn vey low density esidentil, nd thus sufce wte is the pimy souce of potble wte fo the Distict. PAGE UF-1 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

2 FIGURE UF-1 Uppe Flint Bsin within the Meto Wte Distict Sou th DeKlb Fulton Hpeville 285 Ri ve College P Foest P Pe ee C e Chtthoochee Hills 675 Le City Union City Fibun e Flint Rive Be Coll Est Point Dougls Do g Rive Rivedle Moow OCMULGEE 75 M p e e e Jonesboo e C Clyton ee Tyone ee FLINT Line C 85 ee J.W. Smith Resevoi e ee R Keg ee Shpsbug Woolsey Be Tuin 85 Moelnd Senoi Boos Splding o ee hite o le W te hi W C e Gntville Riv e Litt D Cowet ee C To w lig e ne Li Fyette Heny Hmpton n di Pechtee City h In nc Flint Rive Roc B Newnn Lovejoy Fyetteville Flt e l ee o Sh e C AF T te Ced m C ng ni ew MIDDLE CHATTAHOOCHEE e Legend Stems Meiwethe ± Pie n In Stocbidge o it Wh Plmetto Big Cot to 5 10 Miles Les Uppe Flint HUC 8 Boundy Lm Meto Wte Distict Counties Distict Cities Intestte Highwys

3 The Geogi Geologic Suvey Hydologic Atls 18 dtbse identifies ppoximtely 84 es, epesenting bout 15 pecent of the Meto Wte Distict, liely to contin thic soils consideed to be n indicto of significnt goundwte echge es. Of these, thee e ppoximtely 77 sque miles, o 14 pecent of the totl ive bsin e, within the Uppe Flint Rive Bsin (see Tble UF-1). Tble UF-1. Goundwte Rechge Aes within the Uppe Flint Rive Bsin Rechge Ae Type County Sque Miles of Rechge Ae Type within County Pobble Aes of Thic Soil Clyton Cowet Fyette Fulton Heny Totl Rechge Ae Potions of Fulton, Clyton, Heny nd Cowet Counties ovelp the bsin boundy. b Mino diffeences in mpping methodologies my cuse bsin totls to vy slightly fom county totls. Thee e thee soil ssocitions tht descibe the soil types in the Uppe Flint Rive Bsin: Ashl-Pcolet- Cecil, Cecil-Mdison-Pcolet nd the "ubn" soils tht stt in south Fulton County (Tble UF-2). The Ashl- Pcolet-Cecil ssocition ws found long the bns of some of the mjo ives, pticully Pechtee City nd Fyetteville. These soils e vible nd less well dined thn soils on highe elevtions (Thoms nd Tte, 1973; USDA, 1976; Thoms, 1982; USDA, 1958). The Cecil-Mdison-Pcolet ssocitions wee the most bundnt ssocited with modete olling hills. These soils e well dined nd highly wetheed, hving ed to yellowish-ed subsoil (Boc, 1977; Jodn et l., 1973; Muphy, 1979; Thoms nd Tte, 1973; USDA, 1976; Thoms, 1982; Wells, 1961; Robetson et l., 1960; USDA, 1958; Tte, 1967; Thoms nd Tte, 1964). Tble UF-2. Mjo Soil Associtions within the Uppe Flint Rive Bsin Soil Assocition Significnce to Wteshed Mngement Ashl-Pcolet-Cecil Cecil-Mdison-Pcolet Chcteistics: Modetely deep nd excessively dined. Significnce to Wteshed Mngement: Runoff is slow to pid with modetely pid pemebility. Chcteistics: Associted with modete olling hills, well dined, highly wetheed. Significnce to Wteshed Mngement: Sloping sufces my be moe susceptible to incesed eosion due to stomwte unoff velocities fom impevious sufces; welldined soils my be moe pemeble, which inceses infilttion cpcity in es without impevious cove, lso my impove fesibility fo infilttion pctices. 77 b Ubn soils Chcteistics: Highly distubed nd compcted soils. Significnce to Wteshed Mngement: Compcted soils; poo-dined, soils e less fesible fo infilttion, esticted wte dinge. Potected Species Potected species include ll species listed s thetened o endngeed by the USFWS o Ntionl Mine Fisheies Sevice, nd those listed s endngeed, thetened, e o unusul by the Stte of Geogi. The USFWS lso my designte citicl hbitt fo fedelly listed species, which povides potection fo the hbitt s well s the species itself. The cuent listings of these endngeed species, including thei sttus, PAGE UF-3 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

4 wtesheds s well s those wtes tht e designted to meet stte dining wte citei within the Uppe Flint Rive Bsin. Souce wte ssessments wee pefomed fo ll dining wte supplies within the Uppe Flint Rive Bsin s equied by the EPA. The souce wte ssessments detemined the potentil fo pollution bsed on numbe of wteshed chcteistics nd ssigned susceptibility ning to ech souce. The susceptibility nings thoughout the bsin wee low fo Hotons ee nd Ptes ee nd high fo Flint Rive. All othe souce wtes wee ssigned susceptibility ning of medium. These susceptibility nings indicte the ubn nd sububn ntue of most of the wtesheds within the Uppe Flint Rive Bsin. Tble UF-4. Uppe Flint Rive Bsin Dining Wte Supply Souces Wte Supply Souce Owne/Opeto Using Souce Flint Rive Shol ee Resevoi J.W. Smith Resevoi Whitewte ee Le Kedon (Flt ee) Le Pechtee (Flt ee) Le Hoton (Hoton ee) Le McIntosh (Line ee) Line ee White O ee Hutchin s Le (Keg ee) Still Bnch ee Lnd Cove/Lnd Use Clyton County Wte Authoity Fyette County Wte System Clyton County Wte Authoity Clyton County Wte Authoity City of Fyetteville Fyette County Wte System Fyette County Wte System Fyette County Wte System Fyette County Wte System Fyette County Wte System Newnn Utilities Newnn Utilities City of Senoi City of Giffin (To Cowet County) The nothen extent of the Uppe Flint Rive Bsin is tvesed by ove 46 miles of mjo tnspottion coidos such s Intesttes 85, 75 nd 285, s well s Htsfield Atlnt Intentionl Aipot nd its suppoting businesses (Figue UF-3). The Flint Rive, Cmp ee nd Moning ee wtesheds in southesten Fulton County nd nothwesten Clyton County lso include eltively lge mount, 15 pecent, of high o medium density esidentil lnds. With the exception of some limited pocets of dense development ound Fyetteville, Newnn nd Pechtee City, the southen two-thids of the Uppe Flint Rive Bsin e dominted by low density esidentil nd undeveloped lnds. Ovell, the ive bsin ws lmost eqully split between developed nd undeveloped lnds in 2010 with foested/open spce epesenting 28 pecent of the totl cege (Tble UF-5, Figue UF-3). PAGE UF-5 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

5 nge nd hbitt, cn be ccessed vi the USFWS's utomted Infomtion, Plnning nd Consevtion System (IPC, Ntive Species Within the Meto Wte Distict, thee e numbe of potected niml species tht spend ll o pt of thei life cycle in ives nd stems o depend on stems fo significnt potion of thei life histoy. In ddition, thee e potected plnts tht e eithe qutic o semi-qutic nd gow within o long the mgins of ives nd stems. Tble UF-3 lists the 16 potected qutic o semi-qutic species potentilly found within the counties of the Uppe Flint Rive Bsin of the Distict. Tble UF-3. Aqutic nd Semi-Aqutic Potected Species in the Uppe Flint Rive Bsin Fun Type Common Nme Sttus Clyton Cowet Fyette Fulton Heny Bid Bld Egle US X Bid Bchmn's Spow GA X Bid Peegine Flcon GA X Fish Bluestipe Shine GA X Fish Highscle Shine GA X X X X Fish Cheoee Dte US X Invetebtes Chtthoochee yfish GA X Invetebtes Delicte Spie GA X X Invetebtes Inflted Spie GA X Invetebtes Ryed eeshell GA X Invetebtes Southen eemussel GA X X Invetebtes Gulf Moccsinshell US X X X Invetebtes Ovl Pigtoe US X Invetebtes Puple Bnclimbe US X Invetebtes Shinyyed Pocetboo US X X X Invetebtes Southen Eltoe GA X Tout Stems Tout stems e clssified in ccodnce with the pimy nd secondy designtions nd citei defined in Section 15 of Geogi's Wte Use Clssifictions nd Wte Qulity Stndds ( ). Thee e no pimy tout stems o secondy tout stems locted within the Meto Wte Distict of the Uppe Flint Rive Bsin. Lnd Use nd Impied Wtebodies Chcteistics Dining Wte Supply As descibed in the Wte Supply nd Wte Consevtion Pln, thee e 12 individul wte supply souces opeted by six septe entities (Tble UF-4). Figue UF-2 illusttes the coesponding wte supply PAGE UF-4 DECEMBER 2016 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT

6 20 Winston Douglsville 20 Sou th Est Point Dougls Rive DeKlb Hpeville Do g 285 Ri ve C e Fulton Union City Fibun e 675 Le City Flint Rive Be Coll College P Foest P Pe ee Rivedle Moow 75 Chtthoochee Hills M o Jonesboo Stocbidge C ee Clyton FLINT Tyone Line C 85 ee Flt e e R D e ee C e C ee Be Tuin Hmpton To w lig Woolsey Shpsbug Heny n di ne Li Keg ee J.W. Smith Resevoi In Fyette Pechtee City h Flint Rive nc Lovejoy Fyetteville ee l Roc B Newnn 85 OCMULGEE e te ee Big Cot to e e AF T p e m C ng ni ew MIDDLE CHATTAHOOCHEE it Wh Ced Plmetto o Sh Cowet FIGURE UF-2 Uppe Flint Bsin Dining Wte Stem Segments Riv e Senoi Boos hite ee Splding Legend le W o Litt te hi W Moelnd o Dining Wte Stem C e e Dining Wte Les Dining Wte Supply Wtesheds Meiwethe ± 10 Stems Uppe Flint HUC 8 Boundy Pie Miles Meto Wte Distict Counties Distict Cities Intestte Highwys Lm ni

7 FIGURE UF-3 Uppe Flint Rive Bsin 2012 Lnd Cove 285 DOUGLAS DEKALB FULTON OCMULGEE CLAYTON Coll HENRY MIDDLE CHATTAHOOCHEE 75 Splding R 85 AF T COWETA FAYETTE Butts D Legend Meto Wte Distict Counties 2012 Distict Lnd Cove Agicultul Lnds Pie Foest / Open Spce FLINT Toup Meiwethe Lm Commecil / Industil Institutionl High Density Residentil Medium Density Residentil ± Upson 0 Tlbot Miles Low Density Residentil Tnsitionl / Extctive Lnds Tnspottion nd Utility Wte / Wetlnds Uppe Flint HUC-8 Boundy Intestte Highwys Monoe

8 Tble UF-5. Uppe Flint Rive Bsin Lnd Cove / Lnd Use within the Meto Wte Distict Lnd Cove/Lnd Use 2010 Existing (%) 2040 Futue (%) Agicultul Lnds 16 Commecil 6 Foest/Open Spce 28 High Density Residentil 4 Industil/Institutionl 1 Low Density Residentil 21 Medium Density Residentil 11 Tnsitionl/Extctive Lnds 3 Tnspottion nd Utilities 2 Wte/Wetlnds 7 Undeveloped Developed Notes: Undeveloped = Agicultul, Foest / Open Spce nd Wte / Wetlnds Dt Souce: Aggegted Lnd Cove ctegoies fom ARC's 2010 LndPo Geogphic Infomtion System (GIS) nd 2040 Envision Dt The Pln 2040 Unified Policy Gowth Mp estimtes tht ppoximtely 3 pecent of the cuent foested nd gicultul lnd will be developed in the next 25 yes esulting in the Uppe Flint Rive Bsin being 52 pecent developed (ARC, 2012). The eltive pecent distibution nd genel chcte of these gowth es e illustted in Figue UF-4. Much of this gowth is nticipted to occu in the nothen potion of the bsin in south Fulton nd Noth Clyton Counties while infill development nd edevelopment esulting in incesed density is expected to continue in Pechtee City, Newnn nd noth Fyette County. PAGE UF-8 DECEMBER 2016 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT

9 0% 4% Rul Aes 19% 37% Developing Rul Developing Sububs Estblished Sububs Mtuing Neighbohoods Region Employment 28% 11% Figue UF-4. Uppe Flint Rive Bsin Futue Gowth Ae Distibution Note: Ctegoies e defined in Effective Impevious Aes The level of wteshed impeviousness hs long been lined to impcts on chnges in hydologic egimes tht led to incesed intensity nd fequency of pe stomwte flows, which ffect stem stbility, wte qulity nd qutic hbitt nd biotic community integity. In genel, the most sensitive qutic ognisms e ffected t impevious levels gete thn 10 pecent. Between 11 nd 25 pecent of most stem communities become impcted, nd ove 25 pecent of stems e genelly no longe ble to suppot vible biotic communities (Schuele, 2001). Coidos Of the 19 HUC-12s within the Meto Wte Distict potion of Uppe Flint Rive Bsin, six hd n effective impevious e (EIA) gete thn 10 pecent, pimily those HUCs tht included the Htsfield Atlnt Intentionl Aipot nd suounding e o tht stddle mjo tnspottion coido such s Intesttes 85 o 285 o the HUC is locted within the moe densely ubnized e of locl cities lie Newnn nd Pechtee City. Figue UF-5 illusttes tht the HUC-12 with the hedwtes (Mud ee nd Jeste ee) of the Uppe Flint Rive is the only wteshed to hve n EIA gete thn 20 pecent. Attchment 10 lists HUC-12 wteshed numbes nd desciptions. Combined-sewe Oveflow Aes Thee e no combined-sewe oveflow es in the Uppe Flint Rive Bsin. PAGE UF-9 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

10 FIGURE UF-5 Uppe Flint Bsin HUC-12 Effective Impevious Aes (EIA) Est Point Dougls Hpeville College P Foest P Fulton Union City Fibun Coll 675 Le City Moow Rivedle 85 Chtthoochee Hills Stocbidge Coll Jonesboo Plmetto 75 Tyone Clyton Fyetteville Pechtee City Shpsbug Fyette Heny Lovejoy Hmpton Woolsey OCMULGEE Tuin D Cowet R Newnn Moelnd FLINT AF T MIDDLE CHATTAHOOCHEE Senoi Boos Splding Legend Gntville Effective Impevious Ae 0%-5% 5%-10% 10%-15% 15%-20% Meiwethe ± 11 >20% Uppe Flint Pie Miles HUC 12 Boundy Lm Meto Wte Distict Counties Distict Cities Intestte Highwys

11 Impied Wtebodies Geogi EPD detemines whethe wtebody is suppoting its designted uses by collecting wte qulity dt nd comping these dt ginst the wte qulity citei. Geogi EPD descibes thei listing methodology nd pefeed minimum dtset t This methodology is impotnt to undestnd the smple size, extent nd timefme of the dtset tht ws used to list wtebody. Feedbc cn be given to Geogi EPD if dditionl dt o infomtion e nown tht my ffect futue smpling o listing evlutions. Of the 240 miles of stems ssessed in the Meto Wte Distict potion of the Uppe Flint Rive Bsin, 124 miles, o 52 pecent, did not meet stte wte qulity stndds bsed on the (d) list. The stems listed s not suppoting e summized in Tble UF-6 by pmete nd gphiclly shown in Figue UF-6. This includes new fecl colifom bctei listings in Fyette County bsed on 2012 dt nd new biot (fish) listings in Clyton, Fulton nd Fyette Counties bsed on 2008 Geogi Deptment of Ntul Resouces Wte Resouces Division Rive Bsin Monitoing Dt. The dissolved oxygen listing is fo Flt ee fom Le Pechtee to Line ee in Pechtee City, which cn hve low levels of dissolved oxygen duing dought conditions nd peiods of low flow. Sevel stems e listed fo violtions of moe thn one pmete; theefoe, the totl impied miles by pmete will not equl the totl miles of not suppoting stems. Tble UF-6. Uppe Flint Rive Bsin Summy of Impied Stems iteion Violted Miles of Stem % of 2014 Assessed Stems Fecl Colifom Bctei Biot (Fish Community) Biot (Mcoinvetebte Community) 8 3 Dissolved Oxygen 4 2 Totl Stem Milege Listed Totl Stem Milege Assessed fo Possible Impiment 240 Totl Stem Milege in Bsin 397 The mjoity of ssessed stems (43 pecent) in the Uppe Flint Rive Bsin does not meet wte qulity stndds fo fecl colifom bctei s esult of nonpoint souce pollution. These bctei ente the stem fom both nthopogenic nd non-nthopogenic souces, including snity sewe oveflows, leing sewe lines, filing septic systems nd pet/wildlife wste. Fecl colifom typiclly is found in both developed nd undeveloped wtesheds, nd monitoing pogms in Geogi hve found levels tht exceed stte stndds in ubn, gicultul nd foested es (Geogi EPD, 2011). While fecl colifom is ubiquitous in stems coss the county (Geogi EPD, 2011), concenttions of bctei cn incese s esult of the highe density of potentil pollutnt souces nd decesed stomwte filttion nd stomwte tetment fom popultion gowth nd development. Biot listings typiclly indicte high sediment lods in stems, which deceses hbitt qulity fo benthic mcoinvetebtes nd fish. Sediment souces include unoff fom constuction sites s well s fom stembn eosion due to cceleted stemflow velocities fom impevious cove ssocited with ubniztion. PAGE UF-11 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

12 Totl mximum dily lods (TMDLs) nd TMDL Implementtion Plns hve been developed to help juisdictions ddess impied stems nd specific pmetes of concen. Moe infomtion on specific TMDLs in the Uppe Flint Rive Bsin cn be found on the Geogi EPD website. PAGE UF-12 DECEMBER 2016 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT

13 FIGURE UF-6 Uppe Flint Bsin 305(b)/303(d) Listed Wtes Sou th Est Point Dougls Rive DeKlb Hpeville Do g Ri ve 285 College P Sou th Foest P Pe ee C e Union City Fibun e Rivedle Moow OCMULGEE 75 M Chtthoochee Hills Jonesboo p e e e m C ng ni e te C ee 85 Clyton FLINT Tyone Fyetteville ee e R e e 85 To w lig e C Be Tuin e C n di ee Shpsbug Keg ee Woolsey Hmpton In Fyette Pechtee City h ne Li Newnn nc Heny J.W. Smith Resevoi Flint Rive Roc B Lovejoy Flt e l ee o Sh Line C ee AF T Big Cot to Stocbidge o ew Ced it Wh Plmetto MIDDLE CHATTAHOOCHEE Riv e Boos Splding hite ee le W o Litt te hi W D Senoi Moelnd Le City Flint Rive Be Fulton Rive 675 o C e Legend e 2014 Listed Wtes Suppoting Not Suppoting Assessment Pending Stems 2014 Listed Les Meiwethe ± Pie Uppe Flint HUC 8 Boundy Lm Meto Wte Distict Counties 10 Miles Distict Cities Intestte Highwys n In di

14 Mngement Issues nd Recommendtions Initil Sceening of Pioity Aes Within the Meto Wte Distict, the poposed implementtion ctions will vy between bsins depending on the existing lnd uses, wte qulity, stem nd wtebody condition nd othe wteshed-specific mngement issues. The timefme fo implementtion will lso vy bsed on viety of fctos such s TMDL listings, pesence of souce wte wtesheds nd potentil fo significnt development in the futue. Pioity es, lso nown s citicl es pe EPA guidnce, wee identified t the Distict-level by HUC-12 wteshed s n initil sceening to enble communities to pefom moe detiled pioitiztions on subwteshed bsis. The pioity es wee identified t the HUC-12 level in Tble UF-7, if they include stem o wtebody with TMDL, wte supply wtesheds o existing EIA gete thn 10 pecent. Tble UF-7. Uppe Flint Rive Bsin Initil Sceening of Pioity Aes Bsed on HUC-12 Wtesheds Totl HUC-12 Wtesheds (Uppe Flint Rive Bsin) Mngement Issues nd Recommended Sttegies Tble UF-8 outlines mngement issues nd sttegies fo the Uppe Flint Rive Bsin within the Meto Wte Distict. These issues nd sttegies wee used to infom nd guide the moe specific mngement mesues nd equiements found in Sections 5, 6 nd 7. The ecommended sttegies pesented in Tble UF-8 e bsed on dt pesented within this Rive Bsin Pofile. These sttegies e povided to futhe descibe the commonlity of cuses nd potentil solutions to the wteshed issues. They povide foundtion fo guidnce, but e not pesented hee s mndtoy equiements. Tble UF-8. Uppe Flint Rive Bsin Mngement Issues nd Recommended Sttegies Mngement Issue Desciption Recommended Sttegies Souce wte qulity Wtesheds tht Include 303(d)-listed Segment (TMDL) Souce wte wteshed potection of smll wte supply wtesheds. Wte Supply Wtesheds Existing Effective Impevious Cove (EIA > 10%) Pecent of Totl Wtesheds 68% 84% 32% Wte Supply Wtesheds epesent HUC-12 wtesheds tht din to wte supply inte. Mny of the HUC-12s do not ctully contin ny wte supply intes. Implement souce wte potection mesues in ll wte supply subwtesheds. Continue collbotive effots in smll dining wte supply wtesheds, such s Shol ee, Line ee, Flt ee nd White O ee, to potect the vibility of these supplies. Inceses in impevious cove (new development) Inceses in impevious cove cn led to chnge in the hydologic egime of wteshed by cusing moe intense, high-velocity stomwte flows nd incesed eosion nd sedimenttion. 6 (32%) HUC-12 wtesheds with EIA of > 10%. 3% shift fom undeveloped to developed lnd cove ( ). Mnge nonpoint souce pollution. Adopt nd enfoce the post-constuction stomwte contol odinnce nd use of Geogi Stomwte Mngement Mnul design stndds. Wteshed impovement pojects, such s stem estotion nd stembn stbiliztion, e ecommended in es with filing stem bns to educe instem sediment lod contibutions. PAGE UF-14 DECEMBER 2016 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT

15 Tble UF-8. Uppe Flint Rive Bsin Mngement Issues nd Recommended Sttegies Mngement Issue Desciption Recommended Sttegies Indequte stomwte contols on existing impevious cove Biot TMDLs Bctei TMDLs Le mngement Much of the development in the bsin occued pio to cuent Geogi Stomwte Mngement Mnul design stndds. Limited esouces nd cost of mintining nd epiing stomwte infstuctue. Vying locl sttegies of funding stomwte mngement. 12% of the ssessed stems hve impied fish communities nd 3% hve impied benthic mcoinvetebte communities. Biot impiment in this bsin e the esult of high sediment lods, pimily ssocited with existing development with indequte stomwte contols, which is concen fo dining wte souce supplies, biot nd ecetion. 43% of ssessed stem segments in the Flint Rive Bsin (within the Meto Wte Distict) e listed fo fecl colifom bctei. Within the bsin, thee e public nd pivtely-held nd mnged les tht ply significnt ole in meeting designted uses nd downstem hydologic egimes nd wte qulity. Implement n sset mngement pogm to identify nd pioitize mintennce nd cpitl impovement pojects to mximize benefit. Conside updting stomwte contols duing edevelopment. Identify oppotunities fo wteshed impovement pojects to etofit o instll updted stomwte contols, geen infstuctue, stomwte tetment o othe contols. Conside dedicted funding souces such s stomwte utilities nd see out oppotunities fo gnts, lons nd ptneships. Enfoce post-constuction stomwte odinnce on new development nd see oppotunities to etofit stomwte contols to mximize wte qulity nd chnnel potection. Recommend wteshed impovement pojects, such s stem estotion nd stembn stbiliztion, in es with filing stem bns to educe instem sediment lod contibutions. Identify bctei souces though inspections, monitoing, souce tcing nd stem wls. Educte public on pollution pevention, pope septic system mintennce nd epoting potentil illicit dischge. Addess fecl colifom bctei contibutions fom snity sewe oveflows s outlined in the Wstewte Mngement Pln. Pefom egul mintennce to ensue pope functioning of decentlized systems (such s septic tns). Develop centl inventoy of les, owneship nd mngement pctices to fcilitte pollutnt souce identifiction both up nd downstem of the le. Coodinte vilble wte qulity dt nd mngement ctivities fo inventoied les. Implement shoeline potection nd upstem sediment mngement to pevent excessive nutients nd sedimenttion within the le. Fcilitte pope mintennce nd mngement, pticully of smll les by poviding esouces, lins o othe mteils to ssist with peiodic ctivities such s inspections, wte qulity smpling o dedging. Conduct public eduction nd involvement ctivities to pomote wteshed stewdship to potect le qulity. PAGE UF-15 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

16 Tble UF-8. Uppe Flint Rive Bsin Mngement Issues nd Recommended Sttegies Mngement Issue Desciption Recommended Sttegies Flint Rive Flows Due to upstem impcts, the Flint Rive hs significntly educed o no flow duing times of less infll. This hs n impct not only on stem nd ecologicl helth, but lso wte vilbility, ecetion oppotunities, nd othe beneficil downstem uses. Ptne with locl juisdictions nd othe steholdes to develop pojects nd specific sttegies fo ddessing Loo to geen infstuctue nd othe multiple benefit solutions Apply n integted wte mngement ppoch to ddess issues in the Uppe Flint while lso incesing esiliency in the system. Identify Indictos nd Monitoing to Mesue Implementtion Success A citicl component of ny wteshed mngement pogm is the bility to ssess pogess nd detemine if mngement sttegies e effectively ddessing issues. This Pln includes implementtion ctions elted to wteshed monitoing nd conducting conditions ssessments to evlute implementtion success. These implementtion ctions include long-tem mbient tend monitoing (5.F.1) nd hbitt nd biologicl monitoing (5.F.2), s well s esouce-specific implementtion ctions fo TMDL Mngement (4.H.2). Communities my choose to conduct poject-specific monitoing ssocited with wteshed impovement poject, such s biologicl o geomophologicl monitoing to evlute success. As included in EPA (2008), monitoing pogm should tc pogess in meeting lod eduction gols nd ttining wte qulity stndds nd othe gols. Mesuble pogess is citicl to ensuing continued suppot of wteshed pojects, nd pogess is best demonstted with the use of monitoing dt tht ccutely eflect wte qulity conditions elevnt to the identified poblems. Monitoing pogms should include bseline (befoe), poject-specific (duing) nd post-poject (fte) monitoing. Some potentil indictos to mesue implementtion success fo the Uppe Flint Rive Bsin e listed s follows, but this list is not exhustive: PAGE UF-16 DECEMBER 2016 Select epesenttive monitoing sttions within the wteshed to monito fo pollutnts of concen nd othe wte qulity o biologicl pmetes. Use USGS stem gge dt o collect dt to estblish stem stge-dischge eltionships nd clculte o model wte qulity pollutnt lods nd potentil eductions. Clculte o model impovements to hydologic nd hydulic conditions bsed on stuctul poject implementtion. Estimte stembn stbility nd hbitt impovement bsed on nnul stem coss section suveys nd bn eosion monitoing. Conduct stem wls o stuctue inspections to inventoy stuctue condition nd pefomnce, stembn stbility nd ipin condition ove time. Conduct poject monitoing to estblish pe-, duing- nd post-poject conditions, s well s upstem/downstem monitoing duing the sme time peiod to educe the effects of envionmentl vibility. To detemine if wte qulity degdtion is being pevented, conduct GIS nlysis to identify highctivity es of wteshed using eil ovelys, wo odes, fcility inspection, eosion nd METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT

17 sedimenttion contol o new constuction inspection dt. Identify if monitoing dt nd GIS dt follow simil pttens. Tc numbe, loction, size o fetues (tht is, dinge e teted o line feet of estoed stem) of wteshed impovement, geen infstuctue o othe nonpoint souce eduction pojects. Compe pecentge of TMDL stem segments ove time. Tc implementtion ctions by juisdiction within the bsin. Tc enfocement ctions by ctegoy nd loction. Tc stem buffe vinces nd locl pemits issued. Conduct public suveys fo pollution pevention weness o eduction effectiveness, pticully pe nd post dt ssocited with n eduction event. Compe existing wte qulity modeled lods ginst futue wte qulity modeled lods. PAGE UF-17 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT DECEMBER 2016

18 This pge left intentionlly bln. PAGE UF 18 DECEMBER 2016 METROPOLITAN NORTH GEORGIA WATER PLANNING DISTRICT