8 CAR pt. 21, Appendix A. Designated Uses, Specific Standards, and Maps of Waters of the State by Ecoregions

A-1 ARKANSAS POLLUTION CONTROL AND ECOLOGY COMMISSION 8 CAR PT. 21 APPENDIX A Designated Uses, Specific Standards, and Maps of Waters of the State by Ecoregions A-2 APPENDIX A: MAP OF ECOREGIONS OF ARKANSAS Ozark Highlands A-3 Ouachita Mountains A-40 Boston Mountains A-18 South Central Plains A-51 Arkansas Valley A-29 Mississippi Alluvial Plain A-70 A-3 Index to Plates of the Ozark Highlands A-4 DESIGNATED USES: OZARK HIGHLANDS ECOREGION (Plates OH-1, OH-2, OH-3, OH-4) Extraordinary Resource Waters Current River (OH-4) Eleven Point River (OH-4) Strawberry River (OH-3, OH-4) Little Strawberry River (OH-3) Spring River, including its tributaries: Field Creek, Big Creek, English Creek, Gut Creek and Myatt Creek (OH-4) South Fork Spring River (OH-3, OH-4) North Sylamore Creek (OH-3) Buffalo River (OH-2, OH-3) Kings River (OH-2) Bull Shoals Reservoir (OH-2, OH-3) Natural and Scenic Waterways Strawberry River from headwaters to Sharp-Izard County Line (OH-3, OH-4) Kings River - that segment in Madison County (OH-2) Buffalo River (OH-2, OH-3) North Sylamore Creek (OH-3) 19 Ecologically Sensitive Waterbodies Cave Springs Cave, Logan Cave, and numerous springs and spring-fed tributaries which support Southern Cavefish, Ozark Cavefish, Arkansas Darter, Least Darter, Oklahoma Salamander, cave snails, cave crawfish, and unique invertebrates (OH-1, OH-2, OH-3) Strawberry River – location of Rabbitsfoot, Snuffbox, Western Fanshell, Ouachita Kidneyshell, Purple Lilliput, Scaleshell, Elktoe, Ozark Pigtoe, Round Pigtoe, Lilliput, Rainbow, and Bleedingtooth mussels; Least Brook Lamprey, Mooneye, Ozark Shiner, Western Sand Darter, Slenderhead Darter, Gilt Darter, and Strawberry Darter (OH-3, OH-4) Little Strawberry River – location of Ozark Pigtoe, Round Pigtoe mussels; Ozark Shiner and Strawberry Darter (OH-3) Spring River – Curtis Pearlymussel, Western Fanshell, Rabbitsfoot, Scaleshell, Ohio Pigtoe, Ouachita Kidneyshell, Salamander mussel, Purple Lilliput, Bleedingtooth mussel, Rainbow, Fawnsfoot, Elktoe, Ozark Pigtoe, Hickorynut, Round Pigtoe, Snuffbox and Pink Mucket mussels; Ozark Hellbender; Least Brook Lamprey, Mooneye, Blue Sucker, Silver Redhorse, Pealip Redhorse, Western Sand Darter, Current Darter, Gilt Darter, Saddleback Darter, Slenderhead Darter, and Stargazing Darter (OH-4) Rock Creek – Round Pigtoe, Curtis Pearlymussel, Snuffbox and Pink Mucket mussels; and Ozark Hellbender (OH-4) Eleven Point River – location of American Eel, Current Darter, Gilt Darter, and Stargazing Darter; Western Fanshell, Pink Mucket, Ouachita Kidneyshell, Bleedingtooth mussel, Rainbow, Ozark Pigtoe, Round Pigtoe, and Pyramid Pigtoe; and Ozark hellbender (OH-4) Current River – location of Rabbitsfoot, Ouachita Kidneyshell, Western Fanshell, Elktoe, Ozark Pigtoe, Round Pigtoe, Flat Floater, and Pink Mucket mussels (OH-4) Illinois River – Neosho Mucket, Rabbitsfoot, Purple Lilliput, Ouachita Kidneyshell, Ellipse, Rainbow, Elktoe, Round Pigtoe; Redspot Chub, Highfin Carpsucker, Pealip Redhorse, Sunburst Darter, and Highland Darter (OH-1) Primary Contact Recreation - all streams with watersheds of greater than 10 mi2 and all lakes/reservoirs20 Secondary Contact Recreation - all waters20 19 As designated in the National Wild and Scenic Rivers System. 20 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-5 Domestic, Industrial and Agricultural Water Supply - all waters20 Aquatic Life21 Trout Waters White River from Bull Shoals Dam to Dam #3 (OH-3) North Fork White River (OH-3) Spring River from Mammoth Springs to South Fork Spring River (OH-4) Upper White River from Beaver Dam to Missouri state line (OH-1) Lakes and Reservoirs - all Streams Seasonal Ozark Highlands aquatic life use - all streams with watersheds of less than 10 mi2 except as otherwise provided in 8 CAR § 21-505 Perennial Ozark Highlands aquatic life use - all streams with watersheds of 10 mi2 and larger and those waters where discharges equal or exceed 1 cfs Site Specific Designated Use Variations Supported by Use Attainability Analysis or Other Investigations Plate Map Inset Waterbody Variation Source Year OH-1 1 Railroad Hollow Creek No fishable/swimmable uses 3rd Party 1981 OH-1 2 Columbia Hollow Creek Seasonal aquatic life use March-June DEQ 1985 OH-1 6 Holman Creek from the confluence with Town Branch downstream to the confluence with War Eagle Creek No domestic water supply use 3rd Party 2020 OH-1 7 Town Branch from point of discharge of the City of Huntsville WWTP downstream to the confluence with Holman Creek No domestic water supply use 3rd Party 2020 OH-3 13 Moccasin Creek below Arkansas Highway 177 Perennial aquatic life use 3rd Party 1989 OH-4 19 Curia Creek below first waterfall Perennial aquatic life use DEQ 1985 OH-4 22 Stennitt Creek from Brushy Creek to Spring River No domestic water supply use 3rd Party 1999 OH-4 23 Brushy Creek – from Unnamed Tributary to Stennitt Creek No domestic water supply use 3rd Party 2020 OH-4 24 Unnamed Tributary – from Vulcan Outfall 001 to Brushy Creek No domestic water supply use 3rd Party 2020 21 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-6 SPECIFIC CRITERIA: OZARK HIGHLANDS ECOREGION (Plates OH-1, OH-2, OH-3, OH-4) Lakes and Streams Reservoirs Temperature °C (°F)22 29 (84.2) 32 (89.6) Trout Waters 20 (68) Turbidity (NTU) (base/storm) 10/17 25/45 Trout Waters 10/15 Dissolved Oxygen23 Non-Critical Critical 5 <10 mi2 watershed 6 2 10 to 100 mi2 6 5 >100 mi2 watershed 6 6 Trout Waters 6 6 All other criteria (same as statewide) 22 Increase over natural temperatures may not be more than 2.8°C (5°F). 23 At water temperatures ≤ 10°C or during March, April and May when stream flows are 15 cfs and greater, the primary season dissolved oxygen standard will be 6.5 mg/L. When water temperatures exceed 22°C, the critical season dissolved oxygen standard may be depressed by 1 mg/L for no more than 8 hours during a 24-hour period. A-7 Site Specific Criteria Variations Supported by Chemical and Biological Data Criteria with an asterisk (*) were developed using background flow of 4 cfs. Plate Map Inset Waterbody Variation Source Year OH-1 1 Railroad Hollow Creek from headwaters to Spavinaw Creek Year-round DO 2 mg/L 3rd Party 1981 OH-1 3 SWEPCO Reservoir Maximum temperature 54°C (limitation of 2.8°C above natural temperature does not apply) 3rd Party 1984 OH-1 4 Illinois River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 300 mg/L DEQ 1973 OH-1 5 White River (WHI0052 to Missouri state line, including Beaver Reservoir) Chloride 20 mg/L, sulfate 20 mg/L, TDS 160 mg/L DEQ 1973 OH-1 6 Holman Creek from the confluence with Town Branch downstream to the confluence with War Eagle Creek Chloride 180 mg/L, sulfate 48 mg/L, TDS 621 mg/L 3rd Party 2020 OH-1 7 Town Branch from point of discharge of the City of Huntsville WWTP Downstream to the confluence with Holman Creek Chloride 223 mg/L, sulfate 61 mg/L, TDS 779 mg/L 3rd Party 2020 OH-2 8 Kings River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 150 mg/L DEQ 1973 OH-2 9 Crooked Creek from Harrison WWTP outfall to DEQ Monitoring Station WHI0193 Chloride 22.6 mg/L, sulfate 24.4 mg/L, TDS 269 mg/L 3rd Party 2017 OH- 2&3 10 Crooked Creek from DEQ Monitoring Station WHI0193 to mouth Chloride 20 mg/L, sulfate 20 mg/L, TDS 238 mg/L 3rd Party 2017 OH- 2&3 11 Buffalo River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 200 mg/L DEQ 1973 OH-3 12 White River (Dam #3 to Missouri state line, including Bull Shoals Reservoir) Chloride 20 mg/L, sulfate 20 mg/L, TDS 180 mg/L DEQ 1973 OH-3 13 Moccasin Creek below Highway 177 Critical season DO 5mg/L 3rd Party 1989 OH- 3&4 14 White River (Mouth to Dam #3) Chloride 20 mg/L, sulfate 60 mg/L, TDS 430 mg/L DEQ 1973 OH- 3&4 15 Strawberry River Chloride 20 mg/L, sulfate 20 mg/L, TDS 270 mg/L DEQ 1975 A-8 Plate Map Inset Waterbody Variation Source Year OH- 3&4 16 South Fork Spring River Chloride 20 mg/L, sulfate 20 mg/L, TDS 270 mg/L DEQ 1975 OH- 3&4 17 Myatt Creek Chloride 20 mg/L, sulfate 20 mg/L, TDS 270 mg/L DEQ 1975 OH-4 18 Spring River Chloride 20 mg/L, sulfate 20 mg/L, TDS 290 mg/L DEQ 1975 OH-4 19 Curia Creek below first waterfall Critical season DO 6 mg/L DEQ 1985 OH-4 20 Big Creek Chloride 20 mg/L, sulfate 30 mg/L, TDS 270 mg/L DEQ 1975 OH-4 21 Eleven Point River Chloride 20 mg/L, sulfate 20 mg/L, TDS 270 mg/L DEQ 1975 OH-4 22 Stennitt Creek from Brushy Creek to Spring River Sulfate 43.3 mg/L, *TDS 456 mg/L 3rd Party 2020, 1999 OH-4 23 Brushy Creek – from Unnamed Tributary to Stennitt Creek Sulfate 126 mg/L, TDS 549 mg/L 3rd Party 2020 OH-4 24 Unnamed Tributary – from Vulcan Outfall 001 to Brushy Creek Sulfate 260 mg/L, TDS 725 mg/L 3rd Party 2020 OH-4 25 Current River Chloride 20 mg/L, sulfate 30 mg/L, TDS 270 mg/L DEQ 1975 A-9 A-10 A-11 A-12 A-13 Index to Plates of the Boston Mountains A-14 DESIGNATED USES: BOSTON MOUNTAINS ECOREGION (Plates BM-1, BM-2, BM-3) Extraordinary Resource Waters Middle and Devils Forks of the Little Red River including Beech Creek, Tomahawk Creek, Turkey Creek, Lick Creek, Raccoon Creek, and Little Raccoon Creek (BM-2, BM-3) Archey Creek from headwaters to confluence with South Fork Little Red River (BM-2) Illinois Bayou including North, Middle and East Forks (BM-2) Big Piney Creek (BM-2) Hurricane Creek (BM-2) Mulberry River (BM-1, BM-2) Lee Creek from state line upstream to headwaters (BM-1) Salado Creek (BM-3) Kings River (BM-1) Richland Creek and Falling Water Creek (BM-2) Buffalo River (BM-1, BM-2) Natural and Scenic Waterways Mulberry River (BM-1, BM-2) Buffalo River (BM-1, BM-2) Kings River (BM-1) Big Piney Creek (BM-2) 24 Hurricane Creek (BM-2)24 Richland Creek (BM-2)24 Ecologically Sensitive Waterbodies Middle, South, and Devils Forks of Little Red River including Beech Creek, Tomahawk Creek, Turkey Creek, Lick Creek, Raccoon Creek, Little Raccoon Creek, and Archey Creek above Greers Ferry Reservoir - location of endemic Yellowcheek Darter; Western Fanshell, Rabbitsfoot, Bleedingtooth mussel, Purple Lilliput, Pyramid Pigtoe, Ouachita Kidneyshell, Sandbank Pocketbook, Rainbow, Pondhorn, Elktoe, Ozark Pigtoe, Round Pigtoe, Lilliput, and endangered Speckled Pocketbook mussels (except Devils Fork) (BM-2, BM-3) Foshee Cave - location of aquatic cave snail (BM-3) Upper White River - location of Autumn Darter, Highland Darter, and Longnose Darter; Ozark Pigtoe, and Purple Lilliput (BM-1) Primary Contact Recreation - all streams with watersheds of greater than 10 mi2 and all lakes/reservoirs25 Secondary Contact Recreation - all waters25 Domestic, Industrial and Agricultural Water Supply - all waters25 Aquatic Life25 Trout Waters Little Red River below Greers Ferry Dam (BM-3) Lakes and Reservoirs – all 24 As designated in the National Wild and Scenic Rivers System. 25 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-15 Streams Seasonal Boston Mountain aquatic life- all waters with watersheds of less than 10 mi2 except as otherwise provided in 8 CAR § 21-505 Perennial Boston Mountain aquatic life- all waters with 10 mi2 watershed or larger and those waters where discharges equal or exceed 1 cfs Use Variations Supported by Use Attainability Analysis None SPECIFIC CRITERIA: BOSTON MOUNTAINS ECOREGION (Plates BM-1, BM-2, BM-3) Lakes and Streams Reservoirs Temperature °C (°F)26 31 (87.8) 32 (89.6) Trout Waters 20 (68) Turbidity (NTU) (base/storm) 10/19 25/45 Trout Waters 10/15 Dissolved Oxygen (mg/L) 27 Non-Critical Critical 5 <10 mi2 watershed 6 2 10 mi2 and greater 6 6 Trout Waters 6 6 All other criteria (same as statewide) Site Specific Criteria Variations Supported by Chemical and Biological Data Plate Map Inset Waterbody Variation Source Year BM-1 1 Illinois River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 300 mg/L DEQ 1973 BM-1 2 West Fork White River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 180 mg/L DEQ 1975 BM-1 3 White River headwaters to Noland WWTP Chloride 20 mg/L, sulfate, 20 mg/L, TDS 160 mg/L DEQ 1973 BM-1 4 White River from Noland WWTP to 0.4 miles downstream (WR-02) Chloride 44 mg/L, sulfate 79 mg/L, TDS 362 mg/L 3rd Party 2018 BM-1 5 White River from WR-02 to WHI0052 Chloride 30 mg/L, sulfate 40 mg/L, TDS 237 mg/L 3rd Party 2018 26 Increase over natural temperatures may not be more than 2.8°C (5°F). 27 At water temperatures ≤ 10°C or during March, April and May when stream flows are 15 cfs and greater, the primary season dissolved oxygen criteria will be 6.5 mg/L. When water temperatures exceed 22°C, the critical season dissolved oxygen criteria may be depressed by 1 mg/L for no more than 8 hours during a 24-hour period. A-16 Plate Map Inset Waterbody Variation Source Year BM-1 6 White River (WHI0052 to Missouri state line, including Beaver Reservoir) Chloride 20 mg/L, sulfate 20 mg/L, TDS 160 mg/L DEQ 1973 BM-1 7 Kings River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 150 mg/L DEQ 1975 BM-2 8 Buffalo River Chloride 20 mg/L, sulfate, 20 mg/L, TDS 200 mg/L DEQ 1975 A-17 A-18 A-19 A-20 Index to Plates of the Arkansas Valley A-21 DESIGNATED USES: ARKANSAS VALLEY ECOREGION (Plates AV-1, AV-2, AV-3) Extraordinary Resource Waters Cadron Creek including North Fork and East Fork (AV-2, AV-3) Mulberry River (AV-1) Big Creek adjacent to natural areas (AV-3) Natural and Scenic Waterway Mulberry River (AV-1) Ecologically Sensitive Waterbodies None Primary Contact Recreation - all streams with watersheds of greater than 10 mi2 and all lakes/reservoirs28 Secondary Contact Recreation - all waters28 Domestic, Industrial and Agricultural Water Supply - all waters28 Aquatic Life28 Trout Waters Little Red River below Greers Ferry Dam to Searcy (AV-3) Lakes and Reservoirs - all Streams Seasonal Arkansas Valley aquatic life use - all streams with watersheds of less than 10 mi2 except as otherwise provided in 8 CAR § 21-505 Perennial Arkansas Valley aquatic life - all streams with watersheds of 10 mi2 or larger and those waters where discharges equal or exceed 1 cfs Site Specific Designated Use Variations Supported by Use Attainability Analysis Plate Map Inset Waterbody Variation Source Year AV-1 3&4 Poteau River from U.S. Business Highway 71 to Oklahoma state line No domestic water supply use 3rd Party 1995 AV-1 5 Unnamed tributary to Poteau River at Waldron No domestic water supply use 3rd Party 1995 28 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-22 SPECIFIC CRITERIA: ARKANSAS VALLEY ECOREGION (Plates AV-1, AV-2, AV-3) Lakes and Streams Reservoirs Temperature °C (°F)29 31 (87.8) 32 (89.6) Trout Waters 20 (68) Arkansas River 32 (89.6) Turbidity (NTU) (base/storm) 21/40 25/45 Arkansas River 50/52 Trout Waters 10/15 Dissolved Oxygen (mg/L)30 Non-Critical Critical 5 <10 mi2 watershed 5 2 10 to 150 mi2 5 3 151 mi2 to 400 mi2 5 4 >400 mi2 watershed 5 5 Trout waters 6 6 All other criteria (same as statewide) Site Specific Criteria Variations Supported by Chemical and Biological Data Plate Map Inset Waterbody Variation Source Year AV-1 1 Arkansas River (Dardanelle Lock and Dam [L&D #10] to Oklahoma state line, including Dardanelle Reservoir) Chlorides 250 mg/L, sulfates 120 mg/L, TDS 500 mg/L DEQ 311973, 1988 AV-1 2 James Fork Chlorides 20 mg/L, sulfates 100 mg/L, TDS 275 mg/L DEQ 311973, 1975 AV -1 3 Poteau River from Scott County Road 59 to Oklahoma state line Chlorides 120 mg/L, sulfates 60 mg/L, TDS 500 mg/L 3rd Party 1995 AV -1 4 Poteau River from confluence with Unnamed tributary to Scott County Road 59 Chlorides 185 mg/L, sulfates 200 mg/L, TDS 786 mg/L 3rd Party 2020 AV -1 5 Unnamed tributary from Tyson-Waldron Outfall 001 to confluence with the Poteau River Chlorides 180 mg/L, sulfates 200 mg/L, TDS 870 mg/L 3rd Party 2020 29 Increase over natural temperatures may not be more than 2.8°C (5°F). 30 At water temperatures ≤ 10°C or during March, April and May when stream flows are 15 cfs and greater, the primary season dissolved oxygen criteria will be 6.5 mg/L. When water temperatures exceed 22°C, the critical season dissolved oxygen criteria may be depressed by 1 mg/L for no more than 8 hours during a 24-hour period. 31 Cl, SO4 earlier date, TDS later date. A-23 Plate Map Inset Waterbody Variation Source Year AV-2 6 Dardanelle Reservoir Maximum temperature 35°C (95°F) (limitation of 2.8°C above natural temperature does not apply) 3rd Party 1985 AV-2 7 Arkansas River (Murray Lock and Dam [L&D #7] to Dardanelle Lock and Dam [L&D #10]) Chlorides 250 mg/L, sulfates 100 mg/L, TDS 500 mg/L DEQ 321973, 1988 AV-2 8 Arkansas River (Mouth to Murray Lock and Dam [L&D #7]) Chlorides 250 mg/L, sulfates 100 mg/L, TDS 500 mg/L DEQ 321973, 1988 AV- 2&3 9 Cadron Creek Chlorides 20 mg/L, sulfates 20 mg/L, TDS 100 mg/L DEQ 331973, 1981 AV-3 10 Little Red River (including Greers Ferry Reservoir) Chlorides 20 mg/L, sulfates 30 mg/L, TDS 100 mg/L DEQ 321973, 1988 32 Cl, SO4 earlier date, TDS later date. 33 SO4 earlier date, Cl & TDS later date. A-24 A-25 A-26 A-27 Index to Plates of the Ouachita Mountains A-28 DESIGNATED USES: OUACHITA MOUNTAIN ECOREGION (Plates OM-1, OM-2) Extraordinary Resource Waters Lake Ouachita (OM-1, OM-2) DeGray Reservoir (OM-2) Saline River - entire segment including North, Alum, Middle and South Forks (OM-2) Caddo River - above DeGray Reservoir (OM-1, OM-2) South Fork Caddo River (OM-1) Cossatot River - above Gillham Reservoir (OM-1) Caney Creek (OM-1) Little Missouri River - above Lake Greeson (OM-1) Mountain Fork River (OM-1) Big Fork Creek - adjacent to natural area (OM-1) Natural and Scenic Waterway Cossatot River above Gillham Reservoir (OM-1) Little Missouri River above Lake Greeson (OM-1) Brushy Creek (OM-1)34 Ecologically Sensitive Waterbodies Ouachita River above Lake Ouachita - location of Caddo Madtom, Ouachita Darter, Peppered Shiner, Kiamichi Shiner, Beaded Darter, Saddleback Darter, Stargazing Darter; Ouachita Kidneyshell, Ouachita Fanshell, Rabbitsfoot, Elktoe, Pondhorn, Pyramid Pigtoe, Purple Lilliput, Lilliput, and threatened Arkansas Fatmucket mussels (OM-1) South Fork Ouachita River - location of Ouachita Kidneyshell, Pondhorn, Purple Lilliput, Lilliput, Rainbow, Arkansas Fatmucket mussels; and Caddo Madtom (OM-1) Caddo River and all tributaries above DeGray Reservoir - location of endemic Paleback Darter, Caddo Madtom, Beaded Darter; Ouachita Kidneyshell, Slippershell, Southern Pocketbook, Elktoe, Purple Lilliput, Lilliput, and threatened Arkansas Fatmucket mussels (OM-1, OM-2) Mountain Fork River - location of threatened Leopard Darter and Ouachita Shiner; Ouachita Kidneyshell, Purple Lilliput, and Lilliput mussels (OM-1) Cossatot River above Gillham Reservoir - location of threatened Leopard Darter, Ouachita Shiner, and Brown Bullhead; Louisiana Pigtoe mussel (OM-1) Saline River including Alum, Middle, North and South Forks, and Ten Mile Creek - location of endemic Ouachita Madtom, Kiamichi Shiner (North and Alum Fork only), Brown Bullhead (Middle Fork only); Pink Mucket, Southern Pocketbook, Ouachita Kidneyshell, Ouachita Fanshell, Purple Lilliput, Lilliput, Elktoe, Pondhorn, and threatened Arkansas Fatmucket mussels (except South fork and Ten Mile Creek) (OM-2) Little Missouri River above Lake Greeson - location of Caddo Madtom and Elktoe mussel Mayberry Creek (tributary to Hallman's Creek) - location of Paleback Darter and Louisiana Pigtoe (OM-2) Robinson Creek - location of threatened Leopard Darter (OM-1) Primary Contact Recreation - all streams with watersheds of greater than 10 mi2 and all lakes/reservoirs35 Secondary Contact Recreation - all waters36 Domestic, Industrial and Agricultural Water Supply - all waters36 34 As designated in the National Wild and Scenic Rivers System 35 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-29 Aquatic Life36 Trout Waters Upper Lake Hamilton from Blakely Mt. Dam to Hwy. 270 bridge (OM-2) Lakes and Reservoirs – all Streams Seasonal Ouachita Mountain Ecoregion aquatic life - all streams with watersheds of less than 10 mi2 except as otherwise provided in 8 CAR § 21-505 Perennial Ouachita Mountain Ecoregion aquatic life - all streams with watershed of 10 mi2 or larger and those waters where discharges equal or exceed 1 cfs Site Specific Designated Use Variations Supported by Use Attainability Analysis Plate Map Inset Waterbody Variation Source Year OM-1 4 Rolling Fork from unnamed tributary A at Grannis to DeQueen Reservoir No domestic water supply use 3rd Party 1995 OM-1 5 Unnamed tributaries A and A1 at Grannis No domestic water supply use 3rd Party 1995 A-30 SPECIFIC CRITERIA: OUACHITA MOUNTAIN ECOREGION (Plates OM-1, OM-2) Lakes and Streams Reservoirs Temperature °C (°F)36 30 (86) 32 (89.6) Trout Waters 20 (68) Turbidity (NTU) (base/storm) 10/18 25/45 Trout Waters 10/15 Dissolved Oxygen (mg/L) 37 Non-Critical Critical 5 <10 mi2 watershed 6 2 10 mi2 and greater 6 6 Trout Waters 6 6 All other criteria (same as statewide) Site Specific Criteria Variations Supported by Chemical and Biological Data Plate Map Inset Waterbody Variation Source Year OM-1 1 Mountain Fork Chlorides 20 mg/L, sulfates 20 mg/L, TDS 100 mg/L DEQ 1973 OM-1 2 Barren Creek (AR_11140108_907) pH 5.5-8.5 su DEQ 2022 OM-1 3 Upper Rolling Fork Chlorides 20 mg/L, sulfates 20 mg/L, TDS 100 mg/L DEQ 381973, 1981 OM-1 4 Rolling Fork from unnamed tributary A to DeQueen Reservoir Chlorides 130 mg/L, sulfates 70 mg/L, TDS 670 mg/L 3rd Party 1995 OM-1 5 Unnamed tributaries A and A1 at Grannis Chlorides 135 mg/L, sulfates 70 mg/L, TDS 700 mg/L 3rd Party 1995 OM- 1&2 6 Ouachita River (Carpenter Dam to Headwaters, including Lake Ouachita tributaries) Chlorides 10 mg/L, sulfates 10 mg/L, TDS 100 mg/L DEQ 1975 OM-1 7 Prairie Creek: from headwaters to confluence with Briar Creek Critical season DO 4 mg/L 3rd Party 1985 OM-1 8 Cossatot River Chlorides 10 mg/L, sulfates 15 mg/L, TDS 70 mg/L DEQ 1981 OM-1 9 Irons Fork Creek (AR_08040101_838) pH 5.5-8.5 su DEQ 2022 OM-1 10 Short Creek (AR_11140109_719) pH 5.5-8.5 su DEQ 2022 36 Increase over natural temperatures may not be more than 2.8°C (5°F). 37 At water temperatures ≤ 10°C or during March, April and May when stream flows are 15 cfs and greater, the primary season dissolved oxygen criteria will be 6.5 mg/L. When water temperatures exceed 22°C, the critical season dissolved oxygen criteria may be depressed by 1 mg/L for no more than 8 hours during a 24-hour period. 38 SO4 earlier date, Cl & TDS later date. A-31 Plate Map Inset Waterbody Variation Source Year OM-1 11 Caney Creek (AR_11140109_921) pH 5.5-8.5 su DEQ 2022 OM -1 12 Saline River (Red River Basin) Chlorides 20 mg/L, sulfates 10 mg/L, TDS 90 mg/L DEQ 1973 OM-1 12 Saline River (Red River Basin) (AR_11140109_014) Critical season DO 5 mg/L DEQ 2022 OM-1 13 Little Missouri River Chlorides 10 mg/L, sulfates 90 mg/L, TDS 180 mg/L DEQ 391975, 1995 OM-1 14 Muddy Fork Little Missouri River Sulfates 250 mg/L, TDS 500 mg/L DEQ 1998 OM-1 15 South Fork Ouachita River (AR_08040101_043) Critical season DO 5 mg/L, DEQ 2022 OM-1 16 South Fork Caddo River Sulfates 60 mg/L, TDS 128 mg/L 3rd Party 1995 OM-1 17 Back Valley Creek Sulfates 250 mg/L, TDS 500 mg/L 3rd Party 1995 OM-2 18 Dry Fork Creek (AR_11110206_914) pH 5.5-8.5 su DEQ 2022 OM-2 19 Alum Fork Saline River (AR_08040203_014) Critical season DO 5 mg/L DEQ 2022 OM-2 20 Wilson Creek from a point approximately 0.85 mile upstream of Outfall 001 to UMETCO Outfall 001 Chlorides 56 mg/L, sulfates 250 mg/L, TDS 500 mg/L 3rd Party 2012 OM-2 20 Wilson Creek downstream of UMETCO Outfall 001 to its mouth Chlorides 56 mg/L, sulfates 250 mg/L, TDS 500 mg/L 3rd Party 2012 39 Cl earlier date, SO4 & TDS later date. A-32 Temporary Variations Supported by Environmental Improvement Project Plate Map Inset Waterbody Variation Source Year OM-2 1 Chamberlain Creek from headwaters to confluence with Cove Creek Chlorides 68 mg/L, sulfates 1,384 mg/L, TDS 2,261 mg/L40 3rd Party 2020 OM-2 2 Cove Creek from the confluence with Chamberlain Creek to the Ouachita River Sulfates 250 mg/L, TDS 500 mg/L41 3rd Party 2020 OM-2 3 Lucinda Creek from the confluence of Rusher Creek to the confluence with Cove Creek Sulfates 250 mg/L, TDS 500 mg/L41 3rd Party 2020 OM-2 4 Rusher Creek from the confluence of the East and West Forks to confluence with Lucinda Creek Sulfates 250 mg/L, TDS 500 mg/L41 3rd Party 2020 40 These temporary standards variations are effective for 148 months from EPA’s approval of the EIP on January 7, 2020. A-33 A-34 A-35 Index to Plates of the South Central Plains A-36 DESIGNATED USES: SOUTH CENTRAL PLAINS ECOREGION (Plates SCP-1, SCP-2, SCP-3, SCP-4) Extraordinary Resource Waters Saline River (SCP-3, SCP-4) Moro Creek - adjacent to natural area (SCP-2) Natural and Scenic Waterways Saline River from the Grant-Saline County line to mouth (SCP-3) Ecologically Sensitive Waterbodies Little River above Millwood Reservoir - location of Rocky Shiner, Bluehead Shiner, Western Starhead Topminnow; Rabbitsfoot, Texas Pigtoe, Pyramid Pigtoe, Louisiana Pigtoe, Round Pigtoe, Ouachita Kidneyshell, Fawnsfoot, Winged Mapleleaf, Southern Mapleleaf, Gulf Mapleleaf, Ouachita Rock Pocketbook, and Pink Mucket mussels (SCP-1) Grassy Lake and Yellow Creek below Millwood Reservoir - unique ecosystem and biota including but not limited to: Alligator Gar and Blackspot Shiner; Ouachita Rock Pocketbook and Louisiana Pigtoe mussels (SCP-1) Lower Little Missouri River - location of Peppered Shiner, and Longnose Darter, American Eel, Alabama Shad, Crystal Darter, Ouachita Darter, Saddleback Darter, and Stargazing Darter; Rabbitsfoot, Pink Mucket, Pyramid Pigtoe, Round Pigtoe, Ouachita Kidneyshell, Ouachita Fanshell, Southern Pocketbook, Purple Lilliput, Lilliput, and Elktoe mussels (SCP-2) Lower Saline River - location of Peppered Shiner, Crystal Darter, Goldstripe Darter,Western Sand Darter, Saddleback Darter, and Stargazing Darter; Rabbitsfoot, Winged Mapleleaf, Pink Mucket, Texas Pigtoe, Pyramid Pigtoe, Round Pigtoe, Ouachita Kidneyshell, Ouachita Fanshell, Southern Pocketbook, Purple Lilliput, Lilliput, Gulf Mapleleaf, Southern Mapleleaf, Elktoe, and Fawnsfoot mussels (SCP-3) Ouachita River near Arkadelphia - location of Rabbitsfoot, Arkansas Fatmucket, Lilliput, Pyramid Pigtoe, Round Pigtoe, Ouachita Kidneyshell, Ouachita Fanshell, Elktoe, Flat Floater, Ouachita Rock Pocketbook, and Pink Mucket mussels; American Eel, Alabama Shad, Crystal Darter, Saddleback Darter, and Stargazing Darter (SCP-4) Streams with Substantial Springwater Influence L'Eau Frais (SCP-4) Cypress Creek (SCP-4) East and West Fork Tulip Creeks (SCP-4) Others to be determined Primary Contact Recreation - all streams with watersheds greater than 10 mi² and all lakes/reservoirs41 Secondary Contact Recreation - all waters43 Domestic, Industrial, and Agricultural Water Supply - all waters43 41 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-37 Aquatic Life43 Trout Waters Little Missouri River from Narrows Dam to confluence with Muddy Fork (SCP-1) Lakes and Reservoirs - all Streams Seasonal South Central Plains aquatic life - all streams with watersheds of less than 10 mi2 except as otherwise provided in 8 CAR § 21-505 Perennial South Central Plains aquatic life - all streams with watersheds of 10 mi2 or larger and those waters where discharges equal or exceed 1 cfs Site Specific Designated Use Variations Supported by Use Attainability Analysis Plate Map Inset Waterbody Variation Source Year SCP -1 2 Red River from Oklahoma state line to confluence with Little River No domestic water supply use 3rd Party 1994 SCP -1 4 Lick Creek Seasonal aquatic life use; no primary contact DEQ 1988 SCP -1 7 Red River from the mouth of the Little River to the Arkansas/Louisiana state line No domestic water supply use 3rd Party 2016 SCP -1 9 Bluff Creek and unnamed tributary No domestic water supply use 3rd Party 1998 SCP -1 10 Mine Creek from Highway 27 to Millwood Lake No domestic water supply use 3rd Party 1995 SCP -1 15 Caney Creek No domestic or industrial water supply use 3rd Party 1995 SCP -1 16 Bois d'Arc Creek from Caney Creek to Red River No domestic or industrial water supply use 3rd Party 1995 SCP -2 23&24 Dismukes Creek and Big Creek to Bayou Dorcheat No domestic water supply use 3rd Party 2002 SCP -2 25 Albemarle unnamed tributary (AUT) to Horsehead Creek No domestic water supply use 3rd Party 2002 SCP -2 26 Horsehead Creek from AUT to mouth No domestic water supply use 3rd Party 2002 SCP -2 29 Haynes Creek from mouth of Flat Creek to confluence with Smackover Creek No domestic water supply use 3rd Party 2008 SCP -2 30 Flat Creek from mouth of UTA to confluence with Haynes Creek No domestic water supply use 3rd Party 2008 SCP -2 31 Unnamed tributary A to Flat Creek from mouth of EDCC 001 ditch to confluence with Flat Creek No domestic water supply use 3rd Party 2007 SCP -2 32 Unnamed tributary to Flat Creek from EDCC Outfall 001 downstream to confluence with unnamed tributary A to Flat Creek No domestic water supply use 3rd Party 2007 SCP -2 34 Gum Creek No domestic water supply use 3rd Party 1998 SCP -2 44, 45, &48 Bayou de Loutre from mouth of UT004 to Louisiana state line No domestic water supply use 3rd Party 2008 A-38 Plate Map Inset Waterbody Variation Source Year SCP -2 38 Unnamed tributary 002 (UT002) No domestic water supply use 3rd Party 2007 SCP -2 39 Unnamed tributary 004 (UT004) No domestic water supply use 3rd Party 2007 SCP -2 40 Unnamed tributary 003 (UT003) No domestic water supply use 3rd Party 2007 SCP -2 41 Unnamed tributary to Little Cornie Bayou (UTLCB-2) No domestic water supply use 3rd Party 2007 SCP -2 42 Little Cornie Bayou from Walker Branch to Arkansas/Louisiana state line No domestic water supply use 3rd Party 1998 SCP -2 43 Walker Branch No domestic water supply use 3rd Party 1998 SCP -2 46&47 Loutre Creek Perennial aquatic life use, except seasonal from railroad bridge to mouth 3rd Party 1986 SCP -2 47 Loutre Creek from Highway 15 S. to the confluence of Bayou de Loutre No domestic water supply use 3rd Party 2008 SCP -2 49 Boggy Creek from the discharge from Clean Harbors El Dorado LCC downstream to the confluence of Bayou de Loutre No domestic water supply use 3rd Party 2007 SCP -2 51 Jug Creek Perennial aquatic life use 3rd Party 1987 SCP -3 55 Mossy Lake No fishable/swimmable or domestic water supply uses DEQ 1973 SCP -4 58 Town Creek below Acme tributary No domestic water supply use 3rd Party 1995 SCP -4 59 Unnamed tributary from Acme No domestic water supply use 3rd Party 1995 SCP -4 60 Dodson Creek Perennial aquatic life use DEQ 1986 SCP -4 62 Holly Creek No domestic water supply use 3rd Party 1988 SCP -4 65 Alcoa unnamed tributary to Hurricane Creek and Hurricane Creek No domestic water supply use 3rd Party 1998 SCP -4 67 Dry Lost Creek and tributaries No domestic water supply use 3rd Party 1998 SCP -4 69&70 Lost Creek No domestic water supply use 3rd Party 1998 A-39 SPECIFIC CRITERIA: SOUTH CENTRAL PLAINS ECOREGION (Plates SCP-1, SCP-2, SCP-3, SCP-4) Typical Lakes and Streams Reservoirs Temperature °C (°F)42 30 (86) 32 (89.6) Ouachita River (state line to Little Missouri River) 32 (89.6) Red River 32 (89.6) Little River (from Millwood Lake to the Red River) 32 (89.6) Trout Waters 20 (68) Turbidity (NTU) (base/storm) 21/32 25/45 Red River 50/150 Trout Waters 10/15 Dissolved Oxygen (mg/L) 43 Non-Critical Critical 5 <10 mi2 watershed 5 2 10 mi2 - 500 mi2 5 3 >500 mi2 watershed 5 5 All sizes (springwater influenced) 6 5 Trout Waters 6 6 All other criteria (same as statewide) Site Specific Criteria Variations Supported by Chemical and Biological Data Criteria with an asterisk (*) were developed using background flow of 4 cfs. Plate Map Inset Waterbody Variation Source Year SCP -1 1 Little River from Oklahoma State line to Millwood Lake Chlorides 20 mg/L, sulfates 20 mg/L, TDS 100 mg/L DEQ 1973 SCP -1 2 Red River from Arkansas/Oklahoma state line to mouth of the Little River Chlorides 250 mg/L, sulfates 200 mg/L, TDS 850 mg/L DEQ, 3rd Party 1973, 1994 SCP -1 3 Cossatot River Chlorides 10 mg/L, sulfates 15 mg/L, TDS 70 mg/L DEQ 1981 SCP -1 4 Lick Creek - from headwaters to Millwood Reservoir Critical season DO 2 mg/L DEQ 1988 SCP -1 5 Saline River (Red River Basin) Chlorides 20 mg/L, sulfates 10 mg/L, TDS 90 mg/L DEQ 1973 42 Increase over natural temperatures may not be more than 2.8°C (5°F). 43 At water temperatures ≤ 10°C or during March, April and May when stream flows are 15 cfs and greater, the primary season dissolved oxygen criteria will be 6.5 mg/L. When water temperatures exceed 22°C, the critical season dissolved oxygen criteria may be depressed by 1 mg/L for no more than 8 hours during a 24-hour period. A-40 Plate Map Inset Waterbody Variation Source Year SCP -1 6 Little River from Millwood Lake to the Red River Chlorides 20 mg/L, sulfates 20 mg/L, TDS 138 mg/L; temperature 32°C/89.6°F DEQ, 3rd Party 441973, 2016 SCP -1 7 Red River from mouth of the Little River to the Arkansas/Louisiana state line Chlorides 250 mg/L, sulfates 200 mg/L, TDS 780 mg/L DEQ, 3rd Party 451973, 2018 SCP -1 8 Muddy Fork Little Missouri River Sulfates 250 mg/L, TDS 500 mg/L 3rd Party 1998 SCP -1 9 Bluff Creek and unnamed tributary *Sulfates 651 mg/L, *TDS 1033 mg/L 3rd Party 1996 SCP -1 10 Mine Creek from Highway 27 to Millwood Lake Chlorides 90 mg/L, sulfates 65 mg/L, TDS 700 mg/L 3rd Party 1995 SCP -1 11 McKinney Bayou Chlorides 180 mg/L, sulfates 60 mg/L,TDS 480 mg/L DEQ 1973 SCP -1 12 Days Creek Chlorides 250 mg/L, sulfates 250 mg/L,TDS 500 mg/L DEQ 1991 SCP -1 13 Sulphur River Chlorides 120 mg/L, sulfates 100 mg/L,TDS 500 mg/L DEQ 1975 SCP -1 14 Kelley Bayou Chlorides 90 mg/L, sulfates 40 mg/L,TDS 500 mg/L DEQ 1973 SCP -1 15 Caney Creek *Chlorides 113 mg/L, *sulfates 283 mg/L, TDS 420 mg/L 3rd Party 1995 SCP -1 16 Bois d'Arc Creek from Caney Creek to Red River *Chlorides 113 mg/L, *sulfates 283 mg/L, *TDS 420 mg/L 3rd Party 1995 SCP -1 17 Posten Bayou Chlorides 120 mg/L, sulfates 40 mg/L, TDS 500 mg/L DEQ 1973 SCP -1 18 Bodcau Creek Chlorides 250 mg/L, sulfates 70 mg/L, TDS 500 mg/L DEQ 1973 SCP - 1&2 19 Little Missouri River Chlorides 10 mg/L, sulfates 90 mg/L, TDS 180 mg/L DEQ 1975 SCP -2 20 Garland Creek Chlorides 250 mg/L, sulfates 250 mg/L,TDS 500 mg/L 3rd Party 1985 SCP -2 21 Bayou Dorcheat Chlorides 100 mg/L, *sulfates 16 mg/L, TDS 250 mg/L DEQ 1981 SCP -2 22 Crooked Creek Chlorides 250 mg/L, sulfates 10 mg/L,TDS 500 mg/L DEQ 1973 SCP -2 23 Dismukes Creek *Chlorides 26 mg/L, *TDS 157 mg/L 3rd Party 2002 SCP -2 24 Big Creek from Dismukes to Bayou Dorcheat *Chlorides 20 mg/L, *TDS 200 mg/L 3rd Party 2002 SCP -2 25 Albemarle unnamed tributary (AUT) to Horsehead Creek *Chlorides 137 mg/L, *TDS 383 mg/L 3rd Party 2002 44 Cl earlier date, SO4 & TDS later date. A-41 Plate Map Inset Waterbody Variation Source Year SCP -2 26 Horsehead Creek from AUT to mouth *Chlorides 85 mg/L, *TDS 260 mg/L 3rd Party 2002 SCP -2 27 Cypress Creek Chlorides 250 mg/L, sulfates 70 mg/L, TDS 500 mg/L DEQ 1973 SCP -2 28 Smackover Creek Chlorides 250 mg/L, sulfates 30 mg/L, TDS 500 mg/L DEQ 1973 SCP -2 33 Cornie Bayou Chlorides 230 mg/L, sulfates 30 mg/L, TDS 500 mg/L DEQ 1973 SCP -2 34 Gum Creek *Chlorides 104 mg/L, *TDS 311 mg/L 3rd Party 1998 SCP -2 35 Little Corney Bayou Chlorides 200 mg/L, sulfates 10 mg/L, TDS 400 mg/L DEQ 1973 SCP -2 36 Three Creeks Chlorides 250 mg/L, sulfates 10 mg/L, TDS 500 mg/L DEQ 1973 SCP - 2&4 37 Ouachita River (Camden to Carpenter Dam) Chlorides 50 mg/L, sulfates 40 mg/L, TDS 150 mg/L DEQ 1975 SCP -2 42 Little Cornie Bayou Chlorides 200 mg/L, sulfates 20 mg/L, TDS 500 mg/L DEQ 1973 SCP -2 43 Walker Branch Chlorides 180 mg/L, TDS 970 mg/L 3rd Party 1998 SCP -2 44 Bayou de Loutre above Gum Creek Chlorides 250 mg/L, sulfates 90 mg/L, TDS 500 mg/L 3rd Party 1996 SCP -2 45 Bayou de Loutre from AR0001171 outfall 001 to Loutre Creek Maximum water temperature 96°F 3rd Party 2002 SCP -2 46 Loutre Creek from headwaters to railroad bridge Critical season DO 3 mg/L, primary season DO 5 mg/L 3rd Party 1986 SCP -2 47 Loutre Creek from railroad bridge to mouth Critical season DO 2 mg/L 3rd Party 1986 SCP -2 48 Bayou de Loutre below Gum Creek Chlorides 250 mg/L, sulfates 90 mg/L, TDS 750 mg/L 3rd Party 1996 SCP -2 49 Boggy Creek from the discharge from Clean Harbors El Dorado LCC downstream to the confluence of Bayou de Loutre. Chloride 631mg/L, Sulfate 63 mg/L, TDS 1360 mg/L, Selenium 15.6 u/L 3rd Party 2007 SCP - 2&4 50 Moro Creek Chlorides 30 mg/L, sulfates 20 mg/L, TDS 260 mg/L DEQ 1973 SCP -2 51 Jug Creek - from headwaters to confluence with Moro Creek Critical season DO 3 mg/L 3rd Party 1987 SCP - 2&3 52 Ouachita River (Louisiana state line to Camden) Chlorides 160 mg/L, sulfates 40 mg/L, TDS 350 mg/L DEQ 1973 SCP - 2,3,&4 53 Saline River (Ouachita River Basin) Chlorides 20 mg/L, sulfates 40 mg/L, TDS 120 mg/L DEQ 1973 SCP -3 54 Mossy Lake Exempt from 8 CAR § 21- 406 and Subpart 5 DEQ 1973 A-42 Plate Map Inset Waterbody Variation Source Year SCP -3 56 Ouachita River from Ouachita River mile (ORM) 223 to the Arkansas-Louisiana border (ORM 221.1) Site specific seasonal DO criteria: 3 mg/L June and July; 4.5 mg/L August; 5 mg/L September through May. These seasonal criteria may be unattainable during or following naturally occurring high flows, (i.e., river stage above 65 feet measured at the lower gauge at the Felsenthal Lock and Dam, Station No.89-o, and also for the two weeks following the recession of flood waters below 65 feet), which occurs from May through August. Naturally occurring conditions which fail to meet criteria should not be interpreted as violations of these criteria 3rd Party 1997 SCP -3 57 Chemin-A-Haut Creek Chlorides 50 mg/L, sulfates 20 mg/L, TDS 500 mg/L DEQ 1973 SCP -4 58 Town Creek below Acme tributary Sulfates 200 mg/L, TDS 700 mg/L 3rd Party 1995 SCP -4 59 Unnamed tributary from Acme Sulfates 330 mg/L, TDS 830 mg/L 3rd Party 1995 SCP -4 60 Dodson Creek - from headwaters to confluence with Saline River Critical season DO 3 mg/L DEQ 1986 SCP -4 61 Saline River east bifurcation at Holly Creek sulfate 250 mg/L, TDS 500 mg/L 3rd Party 1998 SCP -4 62 Holly Creek Chlorides 30 mg/L, sulfates 860 mg/L, TDS 1600 mg/L 3rd Party 1988 SCP -4 63 Hurricane Creek above Hurricane Lake Dam Chloride 20 mg/L, sulfate 250 mg/L, TDS 500 mg/L DEQ 1973 SCP -4 64 Hurricane Creek from Hurricane Lk. Dam to Ben Ball Bridge Chloride 125 mg/L, sulfate 730 mg/L, TDS 1210 mg/L 3rd Party 1998 SCP -4 65 Alcoa unnamed tributaries to Hurricane Creek and Hurricane Creek Chlorides 125 mg/L, sulfates 700 mg/L, TDS 1100 mg/L 3rd Party 1998 SCP -4 66 Hurricane Creek from Ben Ball Bridge to US Hwy.270 Chloride 125 mg/L, sulfate 700 mg/L, TDS 1200 mg/L 3rd Party 1998 SCP -4 67 Dry Lost Creek and tributaries sulfate 560 mg/L, TDS 880 mg/L 3rd Party 1998 SCP -4 68 Hurricane Creek from Hwy 270 to Saline River Chloride 100 mg/L, sulfate 500 mg/L, TDS 1000 mg/L 3rd Party 1998 SCP -4 69 Lost Creek to Little Lost Creek sulfate 510 mg/L, TDS 820 mg/L 3rd Party 1998 SCP -4 70 Lost Creek below Little Lost Creek sulfate 300 mg/L, TDS 550 mg/L 3rd Party 1998 A-43 Plate Map Inset Waterbody Variation Source Year SCP -4 71 Little Fourche Creek (Willow Springs Branch to Fourche Creek) TDS 179 mg/L 3rd Party 2014 SCP -4 72 Willow Springs Branch (McGeorge Creek to Little Fourche Creek) Sulfate 112 mg/L, TDS 247 mg/L 3rd Party 2014 SCP -4 73 McGeorge Creek (headwaters to Willow Springs Branch) Sulfate 250 mg/L, TDS 432 mg/L 3rd Party 2014 SCP -4 74 Bayou Bartholomew Chlorides 30 mg/L, sulfates 30 mg/L, TDS 220 mg/L DEQ 1973 Temporary Variations Supported by Environmental Improvement Project Plate Map Inset Waterbody Variation Source Year SCP -4 1 Holly Creek Selenium chronic criteria 17 μg/L 3rd Party 2014 SCP -4 2 Reyburn Creek from headwaters to confluence of Francois Creek Sulfates 250 mg/L, TDS 500 mg/L45 3rd Party 2020 SCP -4 3 Scull Creek from a point approximately 350 feet upstream of Clearwater Lake to Clearwater Lake (including Clearwater Lake) and from Clearwater Lake dam to confluence Reyburn Creek Sulfates 250 mg/L, TDS 500 mg/L46 3rd Party 2020 45 These temporary standards variations are effective for 148 months from EPA’s approval of the EIP on January 7, 2020. A-44 A-45 40 39 37 38 A-46 A-47 A-48 Index to Plates of the Mississippi Alluvial Plain A-49 DESIGNATED USES: MISSISSIPPI ALLUVIAL PLAIN ECOREGION (Plates MAP-1, MAP -2, MAP -3, MAP -4, MAP -5) Extraordinary Resource Waters Second Creek (MAP -4) Cache River above Cache Bayou - adjacent to natural areas (MAP -3) Arkansas River below Norrell Lock and Dam (Dam #2) (MAP -5) Strawberry River (MAP -1) Two Prairie Bayou adjacent to natural areas (MAP -3) Natural and Scenic Waterways None Ecologically Sensitive Waterbodies Lower St. Francis River and lower 10 miles of Straight Slough - location of Pondhorn, Western Fanshell, Pink Heelsplitter, Fawnsfoot, Elktoe, Gulf Mapleleaf, Southern Mapleleaf, Round Pigtoe, Pyramid Pigtoe, Scaleshell, Hickorynut, Fat Pocketbook mussels (MAP -2, MAP -4) Right Hand Chute at confluence with St. Francis River - location of Fawnsfoot, Tapered Pondhorn, Scaleshell, Pyramid Pigtoe, and Fat Pocketbook mussels (MAP -2) Departee Creek - location of Flat Floater mussel (MAP -1) Black River at mouth of Spring River - location of Rabbitsfoot, Western Fanshell, Hickorynut, Round Pigtoe, Pyramid Pigtoe, Pink Mucket mussels; Lake Sturgeon and Sabine Shiner (MAP -1) Channel-altered Mississippi Alluvial Plain Ecoregion Streams - These include the majority of the streams in this ecoregion and are characterized by substantial alteration of the morphology of their main-stream channel as well as their tributary streams. Such alteration of the tributaries of these streams significantly affects the water quality and hydrology of the streams and their watersheds. Most of the upper segments of these waters have been dredged and straightened into ditches. Additionally most of the tributaries of these streams have been straightened, ditched and, in some cases, rerouted to quickly move water off the agriculture fields and into the major streams. In the lower segments of these waters, channel realignment is less expansive but most of these channels have been “snagged” to remove any in-stream obstructions (brush, logs, and other debris) and the stream channel and banks have been dredged to uniform depths and cleared of any obstructions. These include Cache River, Bayou DeView, Village Creek, Blackfish Bayou and others to be determined by the division on a case by case basis. Primary Contact Recreation - all streams with watersheds of greater than 10 mi2 and all lakes/reservoirs46 Secondary Contact Recreation - all waters48 Domestic, Industrial and Agricultural Water Supply - all waters48 Aquatic Life48 Trout Waters - none Lakes and Reservoirs - all Streams Seasonal Mississippi Alluvial Plain aquatic life - all streams with watersheds of less than 10 mi2 except as otherwise provided in 8 CAR § 21-505 Perennial Mississippi Alluvial Plain aquatic life - all streams with watersheds 10 mi2 or larger and those waters where discharges equal or exceed 1cfs 46 Except for those waters with designated use variations supported by Use Attainability Analysis or other investigations. A-50 Site Specific Designated Use Variation Supported by Use Attainability Analysis Plate Map Inset Waterbody Variation Source Year MAP - 1 3 Curia Creek below first waterfall Perennial aquatic life use DEQ 1985 MAP - 1 6 Coon Creek and unnamed tributary from Frit Ind. No domestic water supply use 3rd Party 1996 MAP - 2 19 Ditch No. 27 No domestic water supply use 3rd Party 2006 MAP - 2 20 Ditch No. 6 No domestic water supply use 3rd Party 2006 MAP - 3 26 Rocky Branch Creek and Bayou Meto from Rocky Branch Creek to Bayou Two Prairie No domestic water supply use 3rd Party 2008 MAP - 3 70 Unnamed ditch to Little LaGrue Bayou Perennial aquatic life use DEQ 1986 MAP - 5 76 Little Lake Bayou Seasonal aquatic life use, no primary contact use DEQ 1986 SPECIFIC CRITERIA: MISSISSIPPI ALLUVIAL PLAIN ECOREGION (Plates MAP -1, MAP -2, MAP -3, MAP -4, MAP -5) Least-Altered Channel-Altered Lakes and Streams Streams Reservoirs Temperature oC (oF)47 30 (86) 32 (89.6) 32 (89.6) White River 32 (89.6) St. Francis River 32 (89.6) Mississippi River 32 (89.6) Arkansas River 32 (89.6) Turbidity (NTU) (base/storm) 45/84 75/250 25/45 Arkansas River 50/52 Mississippi River 50/75 St. Francis River 75/100 Dissolved Oxygen (mg/L)48 Non-Critical Critical Non-Critical Critical 5 <10 mi2 watershed 5 2 5 2 10 mi2 to 100 mi2 5 3 5 3 >100 mi2 watershed 5 5 5 5 All other criteria (same as statewide) Site Specific Criteria Variations Supported by Chemical and Biological Data Criteria with an asterisk (*) were developed using background flow of 4 cfs. 47 Increase over natural temperatures may not be more than 2.8°C (5°F). 48 When water temperatures exceed 22°C, the critical season dissolved oxygen criteria may be depressed by 1 mg/L for no more than 8 hours during a 24-hour period. A-51 Plate Map Inset Waterbody Variation Source Year MAP- 1,3,4,&5 1 White River (Mouth to Dam #3) Chloride 20 mg/L, sulfate 60 mg/L, TDS 430 mg/L DEQ 1973 MAP- 1&2 2 Black River Chloride 20 mg/L, sulfate 30 mg/L, TDS 270 mg/L DEQ 1975 MAP -1 3 Curia Creek below first waterfall Critical season DO 6 mg/L DEQ 1985 MAP -1 4 Strawberry River Chloride 20 mg/L, sulfate 20 mg/L, TDS 270 mg/L DEQ 1975 MAP-1 5 Current River Chloride 20 mg/L, sulfate 30 mg/L, TDS 270 mg/L DEQ 1975 MAP -1 7 Unnamed tributary from Frit Ind., to Coon Creek *Sulfates 48 mg/L 3rd Party 1996 MAP- 1&3 8 Cache River Chloride 20 mg/L, sulfate 30 mg/L, TDS 270 mg/L DEQ 1981 MAP- 1&2 9 Lost Creek Ditch Chloride 20 mg/L, sulfate 30 mg/L, TDS 270 mg/L DEQ 1973 MAP -1 10 Unnamed tributary to Big Creek Chlorides 71 mg/L, sulfates 60 mg/L, TDS 453 mg/L 3rd Party 2011 MAP -1 11 Big Creek from Whistle Ditch to mouth of unnamed tributary Chloride 58 mg/L, sulfates 49 mg/L 3rd Party 2011 MAP -1 12 Bayou DeView from AR Hwy 14 to Whistle Ditch Chloride 48 mg/L, sulfates 38 mg/L, TDS 411.3 mg/L 3rd Party 2011 MAP - 1&3 13 Bayou DeView from mouth to AR Hwy 14 Chloride 48 mg/L, sulfates 37.3 mg/L, TDS 411.3 mg/L 3rd Party 2011 MAP- 1&4 14 L'Anguille River Chloride 20 mg/L, sulfate 30 mg/L, TDS 235 mg/L DEQ 1975 MAP-2 15 St. Francis River (36o N. Lat. to 36o 30' N. Lat.) Chloride 10 mg/L, sulfate 20 mg/L, TDS 180 mg/L DEQ 1973 MAP- 2&4 16 St. Francis River (Mouth to 36o N. Lat.) Chloride 10 mg/L, sulfate 30 mg/L, TDS 330 mg/L DEQ 1973 MAP-2 17 Little River Chloride 20 mg/L, sulfate 30 mg/L, TDS 365 mg/L DEQ 1973 MAP-2 18 Pemiscot Bayou Chloride 20 mg/L, sulfate 30 mg/L, TDS 380 mg/L DEQ 1973 MAP -2 19 Ditch No. 27 Sulfates 480 mg/L, TDS 1,200 mg/L, maximum water temperature 95oF 3rd Party 2006 MAP -2 20 Ditch No. 6 from Ditch No. 27 confluence to its mouth Sulfates 210 mg/L, TDS 630 mg/L 3rd Party 2006 MAP -2 21 Tyronza River headwaters to Ditch No. 6 confluence Chlorides 20 mg/L, sulfates 30 mg/L, TDS 350 mg/L DEQ 1975 MAP - 2&4 22 Tyronza River from Ditch No. 6 confluence to its mouth Chlorides 20 mg/L, sulfates 60 mg/L, TDS 350 mg/L 3rd Party 2006 MAP - 2&4 23 Mississippi River (Arkansas River to Missouri state line) Chloride 60 mg/L, sulfate 175 mg/L, TDS 450 mg/L DEQ 1973 MAP -3 24 Arkansas River (Mouth to Murray Lock and Dam [L&D #7]) Chlorides 250 mg/L, sulfates 100 mg/L, TDS 500 mg/L DEQ 1973 MAP -3 25 Plum Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 A-52 Plate Map Inset Waterbody Variation Source Year MAP -3 26 Rocky Branch Creek *Chlorides 64 mg/L 3rd Party 2008 MAP -3 27 Bayou Meto (Rocky Branch to Pulaski/Lonoke county line) *Chlorides 64 mg/L 3rd Party 2008 MAP -3 28 Indian Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 29 Snow Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 30 Bayou Meto from mouth to Pulaski/Lonoke county line Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 31 Bakers Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 32 Indian Bayou Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 33 Caney Creek Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 34 Caney Creek Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 35 Main Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 36 Flat Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 37 Salt Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 38 Crooked Creek Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 39 Bayou Two Prairie (Pulaski/ Lonoke county line to Northern boundary of Smoke Hole Natural Area) Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 40 Bayou Two Prairie (Southern boundary of Smoke Hole Natural Area to Mouth) Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 41 Brownsville Branch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 42 Ricky Branch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 43 White Oak Branch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 44 Shumaker Branch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 45 Fish Trap Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 45 Skinner Branch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 46 Eagle Branch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 47 Big Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 49 Blue Point Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 49 Buffalo Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 A-53 Plate Map Inset Waterbody Variation Source Year MAP -3 50 Dennis Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 51 Flynn Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 52 Wabbaseka Bayou Chlorides 95 mg/L, sulfates 45mg/L 3rd Party 2008 MAP -3 53 Bradley Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 54 Boggy Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 55 Tupelo Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 56 Five Forks Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 57 Cross Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 58 Salt Bayou Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 59 Government Cypress Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 60 Newton Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 61 West Bayou Chlorides 95 mg/L, sulfates 45mg/L 3rd Party 2008 MAP -3 62 Bubbling Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 63 Tipton Ditch Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 64 Castor Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 65 Long Pond Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 66 Brushy Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 DMAP - 3 67 Little Bayou Meto Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 68 Hurricane Slough Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 69 Bear Bayou Chlorides 95 mg/L, sulfates 45 mg/L 3rd Party 2008 MAP -3 70 Unnamed ditch to Little LaGrue Bayou - from headwaters to confluence with Little LaGrue Bayou Critical season DO 3 mg/L DEQ 1986 MAP -3 71 Little Red River (including Greers Ferry Reservoir) Chlorides 20 mg/L, sulfates 30 mg/L, TDS 100 mg/L DEQ 491973, 1988 MAP-5 72 Overflow Creek Chloride 20 mg/L, sulfate 30 mg/L, TDS 170 mg/L DEQ 1973 MAP-5 73 Bayou Bartholomew Chloride 30 mg/L, sulfate 30 mg/L, TDS 220 mg/L DEQ 1973 49 Cl & TDS earlier date, SO4 later date. A-54 Plate Map Inset Waterbody Variation Source Year MAP-5 74 Bayou Macon Chloride 30 mg/L, sulfate 40 mg/L, TDS 330 mg/L DEQ 1973 MAP-5 75 Boeuf River Chloride 90 mg/L, sulfate 30 mg/L, TDS 460 mg/L DEQ 1973 MAP -5 76 Little Lake Bayou Critical season DO 2 mg/L DEQ 1986 MAP -5 77 Mississippi River (Louisiana state line to Arkansas River) Chloride 60 mg/L, sulfate 150 mg/L, TDS 425 mg/L DEQ 1973 A-55 A-56 A-57 A-58 A-59