lD Statement of Basis and Purpose for Regulation 34 June 13-14, 2022 Rulemaking Submitted by American Rivers, American Whitewater, Colorado Trout Unlimited, Conservation Colorado, Dolores River Anglers (Chapter 145 Trout Unlimited), High Country Conservation Advocates, The Pew Charitable Trusts, San Juan Citizens Alliance, Trout Unlimited and Western Resources Advocates DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT Water Quality Control Commission REGULATION NO. 34 - CLASSIFICATIONS AND NUMERIC STANDARDS FOR SAN JUAN RIVER AND DOLORES RIVER BASINS 5 CCR 1002-34 (Editor's Notes follow the text of the rules at the end of ths CCR: Ducument) 34.54 STATEMENT OF BASIS, SPECIFIC STATUTORY AUTHORITY AND PURPOSE; JUNE 13-14, 2022 RULEMAKING; FINAL ACTION AUGUST 8, 2022; EFFECTIVE DATE DECEMBER 31, 2022 The provisions of C.R S. 25-8-202(1)(a), (b) and (2); 25-8-203; 25-8-204; and 25-8-402; provide the specific statutory authority for adoption of these regulatory amendments. The Commission also adopted in compliance with 24-4-103(4) C.R.S. the following statement of basis and purpose. Statement of Basis and Purpose A. Waterbody Segmentation Some renumbering and/or creation of new segments in the basin was made due to information which showed that new water quality data indicated that streams should be resegmented based on changes in their water quality; and/or certain segments could be grouped together in one segment because they had similar quality and uses. The following changes were made: Animas and Florida River Basins Bear Creek, Boulder Creek, Cascade Creek. Bear Creek and Boulder Creek were removed from segment 6 and placed in segment 12c. The upper portion of Cascade Creek was removed from segment 12a and placed in segment 12c. This segmentation combines reaches with similar use classification, standards, and Outstanding Waters (OW) designation. Segment 12c is now defined as: 12c. Hermosa Creek, including all tributaries, from the source to immediately below the confluence with Long Hollow, except for the East Fork of Hermosa Creek. Mainstem of Bear Creek, including tributaries and wetlands, from its source to the confluence with Mineral Creek. Mainstem of Boulder Creek, including tributaries and wetlands, from its source to the downstream public land boundary. Mainstem Cascade Creek including tributaries and wetlands from source to Tacoma diversion. To maintain consistency with segmentation changes, segment 12c was excluded from segment 6. Grasshopper Creek and Lime Creek. Grasshopper Creek and Lime Creek were removed from segment 12a and placed in segment 1. This segmentation combines reaches with similar use classification, standards, and OW designation. Segment 1 is now defined as: 1. All tributaries to the Animas River and Florida River, including all wetlands, which are within the Weminuche Wilderness Area. Mainstem Grasshopper Creek including tributaries and wetlands from source to confluence with Animas River. Mainstem Lime Creek including tributaries and wetlands from source to confluence with Cascade Creek. To maintain consistency with segmentation changes, segment 1 was excluded from segment 12a. Dolores River Basin Bear Cieek. Priest Creek. Wildcat Creek. Stoner Creek. Mainstem Dolores River and wetlands and tributaries from source to below confluence with Snow Spur Creek_ Those portions of Bear Creek, Priest Creek, Stoner Creek. and Wildcat Creek that lie within the boundaries of the San Juan National Forest were moved from segment 5a to 5b. The Dolores River from its source to below the confluence with Snow Spur Creek, was moved from segment 2 to Segment 5b. All wetlands and tributaries to the mainstem of the Dolores from its source to below the confluence with Snow Spur Creek were moved from segment 5a to 5b. Segment 5b is now defined as: 5b. the mainstem of Rio Lado from the source to the confluence with the Dolores River. Mainstem of Little Taylor Creek from the source to the confluence with Taylor Creek. Mainstemis of Bear Creek, Priest Creek, Wildcat Creek and Stoner Creek, including tributaries and wetlands, from their sources within the San Juan National Forest to the National Forest Boundary. Mainstem of the Dolores River, including tributaries and wetlands, from the source to a point immediately below the confluence with Snow Spur Creek, except for the listings in Segment 1. This segmentation combines reaches with similar use classification, standards, and OW designation. To maintain consistency with segmentation changes, segment 2 is now defined as: 2. Mainstem of the Dolores River from a point immediately below the confluence with Snow Spur Creek to a point immediately above the confluence with Horse Creek. Coal Creek, Slate Creek, and West Fork Dolores River. Coal Creek was removed from segment 7 and placed in segment 1. Slate Creek was removed from segment 6 and placed in segment 1. The upper portion of the mainstem of the West Fork Dolores River was removed from segment 10a and placed in segment 1. This segmentation combines reaches with similar use classification, standards, and OW designation. Segment 1 is now defined as: 1. All tributaries and wetlands to the Dolores River and West Dolores River which are within the Lizard Head Wilderness area. Mainstem of the West Fork of the Dolores River, including wetlands, from Lizard Head Wilderness boundary to the bridge at County Road 38. Mainstems of Coal Creek and Slate Creek, including tributaries and wetlands, from the boundary of the Lizard Head Wilderness Area to their confluences with the Dolores River. To maintain consistency with segmentation changes, segment 1 was excluded from segment 10a; segment 7 was deleted; and segment 6 is now defined as: 6. Mainstem of Coke Oven Creek, from the Lizard Head Wilderness Area boundary to its confluence with the Dolores River. San Juan River Basin Fall Creek. Wolf Creek, and Quartz Creek. Fall Creek, Wolf Creek, and Quartz Creek were removed from segment 5 and placed in segment 4. This segmentation combines reaches with similar use classification, standards, and OW designation. Segment 4 is now defined as: 4. All tributaries to the San Juan River, Rio Blanco, and Navajo River including all wetlands which are within the Weminuche Wilderness area and South San Juan Wilderness Area. Mainstem of Fall Creek, including tributaries and wetlands, from its source to the irrigation diversion just upstream from the confluence with Wolf Creek. Mainstem of Wolf Creek, including tributaries and wetlands, from the boundary of the Weminuche Wilderness area to the confluence with Fall Creek. Mainstem of Quartz Creek, including tributaries and wetlands, from the boundary of the South San Juan Wilderness area to the boundary of the San Juan National Forest. To mainiain consistenc, with segmentation Janges seyment 4 was excludedf from segmer L 5, B Changes to Antidegradation Designation The Commission reviewed changes to segments AF12C, AF01. D005b. D001 and SJ04 to determine if the Outstanding Waters (OW) designation is warranted. Based on evidence that shows the water quality meets the requirements of section 31 8(2)(a), and on the presence of unique conservation values possessed by these stream segments, the OW designation was added to [List to be completed following preliminary final action by tne commission. Outstanding Waters Designation The Southwest Colorado Outstanding Waters Coalition (or the Coalition) proposed the classification of OW for numerc us segments in the Gunnison and San Juan Basins in order to protect water quality to the highest level possible under state regulations, to support fish, wildlife and vegetation habitat mitigation, and to preserve outstanding stream segments that provide climate refugia. The Commission added the OW designation to the following segments based on the following evidence: Animas River Basin Boulder Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a) and the presence of outstandingly remarkable ecological values for aquatic habitat and drinking water supply, OW designation was warranted and Boulder Creek was added to segment 12c. Bear Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a) and the presence of outstandingly remarkable ecological values for aquatic habitat and drinking water supply, OW designation was warranted and Bear Creek was added to segment 12c. Upper Cascade Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a), on the presence of outstandingly remarkable values for aquatic habitat, recreational paddling, and swimming, and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, OW designation was warranted and Upper Cascade Creek was added to segment 12c. Lime Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a), on the presence of outstandingly remarkable values for aquatic habitat, recreational paddling and swimming, and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities OW designation was warranted and Lime Creek was added to segment 1. Grasshopper Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a), on the presence of outstandingly remarkable ecological values for aquatic habitat, including for sensitive trout species, and on the existence of an essentially undisturbed montane watershed environment with wilderness values, OW designation was warranted and Grasshopper Creek was added to segment 1. San Juan River Basin Fall Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a) and the presence of outstandingly remarkable ecological values for aquatic habitat, including habitat for San Juan cutthroat trout, and wilderness values, OW designation was warranted and Fall Creek was added to segment 4. Wolf Creek. Based on ample evidence that water quality meets the requirements of 31.8(2)(a) and the presence of outstandingly remarkable ecological values for aquatic habitat, including habitat for San Juan cutthroat trout, and Milderness values. OW designation was War rranted and Wolf Creek Nas added to segment 4. Quartz Creek. Based on ample evidence that water quality nieets the requirements of 31.8(2)a) and the presence of outstandirgly remarkable ecological values for aquatic h3 abitat, including habitat for sensitive cutthroat trout species, and wilderness values, OW designation was warranted and Quartz Creek was added to segment 4. Upper Dolores River Basin Bear Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of increasingly-crticaly-challenged, conservation-quality, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment: and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities. that portion of Bear Creek that lies within the boundaries of the San Juan National Forest was added to segment 5b and designated as OW. Coal Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of increasingly-crtically-challenged, conservation-quality, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, that portion of Coal Creek from the boundary with Lizard Head wilderness Area to its confluence with the Dolores River was added to segment 1 and designated as OW. Dolores River above Snow Spur Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of criticaly-challenged, conservation-quality, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, that portion of the mainstem Dolores immediately below the confluence with Snow Spur Creek up to its source was added to segment 5b and designated as OW. Priest Gulch Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of increasingly-criticaly-challenged, conservation-qually, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, that portion of Priest Gulch Creek that lies within the boundaries of the San Juan National Forest was added to segment 5b and designated as OW. Slate Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of increasingly-criticaly-challenged, conservation-qualily, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, that portion of Slate Creek between the boundary with Lizard Head Wilderness Area and its confluence with the Dolores River was added to segment 1 and designated as OW. Snow Spur Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of increasingly-crticaly-challenged, conservation-qualty, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, Snow Spur Creek was added to segment 5b and designated as OW. Stoner Creek. Based On ample evidence that W ater quanty meets the TE quirements of section 31.8(2)a), on the cresence of increasingly-crti-aly-challenged, conservation- quality. native Colorado River Cutthroat pooulations and habitat throughout the stre am segmer t: on the existence of an essentially undisturbed montane watershed environment: and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities. that portion of Stoner Creek that lies within the boun daries of the San Juan National Forest was added to segment 5b and designated as OW. WestFork Dolcres River. Based on ample evidence that water quality meets the requirements of section 31.8,2)(a), on the presence of increasingly-crticaly-challenged, conservation-qualily, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, that portion of the West Fork from the Lizard Head Wilderness Area boundary downstream to the bridge at County road 38 was added to segment 1 and designated as OW. Wildcat Creek. Based on ample evidence that water quality meets the requirements of section 31.8(2)(a), on the presence of increasingly-critically-challenged, conservation-quality, native Colorado River Cutthroat populations and habitat throughout the stream segment; on the existence of an essentially undisturbed montane watershed environment; and on the availability of pristine backcountry recreational fishing, hunting, camping, and hiking opportunities, that portion of Wildcat Creek that lies within the boundaries of the San Juan National Forest was added to segment 5b and designated as OW. Data demonstrating that the above segments meet or exceed the water quality standards set by the Commission for OWs are contained in Appendix 1 of the Southwest Colorado Outstanding Waters Coalition Prehearing Statement (March 2022). The Commission has determined that the evidence demonstrates that the three criteria for an OW designation set forth in section 31.8(2)(a) are met for this proposal. The Commission also notes that the outreach undertaken by the Southwest Outstanding Waters Coalition as the proponent of these designations helps to demonstrate broad support for the conclusion that these waters constitute an outstanding natural resource and that the additional protection provided by this designation is appropriate. The Commission understands that there are existing land uses, including grazing permits, in place in many of these watersheds. The evidence demonstrates that these existing land uses are compatible with the OW designation, since the current high level of water quality has been attained with these uses in place. It is the Commission's intent that these OW designations should not be the basis upon which federal, state or local agencies place more onerous or costly conditions upon permits or approvals existing at the time of the designation, or upon any renewals thereof. Further, acknowledging that the adoption of the OW designation for identified segments is a discretionary undertaking by the Commission, with such designations not being subject to federal approval or disapproval, the Commission may, in the future, remove the OW designation from any such segment in accordance with the state substantive and procedural rules then in effect. COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT WATER QUALITY CONTROL COMMISSION 5 CCR 1002-34 REGULATION NO. 34 CLASSIFICATIONS AND NUMERIC STANDARDS FOR SAN JUAN RIVER AND DOLORES RIVER BASINS APPENDIX 34-1 Stream Classifications and Water Quality Standards Tables Effective 12/31/2022 Abbreviations and Acronyms Aq - Aquatic C = degrees Celsius CL = cold lake temperature tier CLL = cold large lake temperature tier CS-I - cold stream temperature tier one CS-I1 = cold stream temperature tier two D.O. = dissolved oxygen DM = daily maximum temperature DUWS = direct use water supply E. coli = Escherichia coli EQ - existing quality mg/L = milligrams per liter mg/m2 = milligrams per square meter mL - milliliter MWAT = maximum weekly average temperature OW - outstanding waters SC = sculpin SSE = site-specific equation T = total recoverable = total tr = trout TVS = table value standard ug/L - micrograms per liter UP = use-protected WS = water supply WS-I = warm stream temperature tier one WS-II = warm stream temperature tier two WS-III = warm stream temperature tier three WL - warm lake temperature tier REGULATION #34 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS San Juan River Basin non ne Lan SVt Rin Blanco, and vas 3j0 n rinciun ma * m a : nys nassivian Soun San sa1 MrTS Mainslem ofFall Creek mcludica noutares andwellands. rom, IS source to the rrigaton Ur CBLNsDAUIaINA confecewin WolrCreek Mustemtairess. including Inbiularies and wellands from tne bourdary vof the V/eminuche Wideressarean to Ihe.confluencewilkF Fall Creeh Mansten pfQuartz Creek. including Irbutaresany ellands: frofn boundary 5 the South San Juan Wldemess area jo thes boundry o the San Juan Nalional Forest COSJSJ04 Classifications Physical and Bicloge ai Metals (ug/L) Designation Agriculture DM MWAT acute chronic OW Aq Life Cold 1 Temperature *C CS-I CS-I Arsenic 340 Pecreation E acute chronic Arsenici / 0.02 Water Supply D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: DO. (spawning) a Cadmium T) 5.0 Othern pH 6.5-9.0 Chromium m TVS Temporary Mortification(s): chlorophyll a (mg'm2) 150 Chromium III(T) 50 Arsenic(chronic) aybrid E. Coli (per 100 mL) 126 Chromium VI TVS TVS Expiration Date of 12/31/2024 Copper TVS TVS Inorganic Iron - (mg/L) WS Uranium(acute): See 34.5(3) for details Uranium(chronic) See 34,5(3) for details. acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron 0.75 Lead(T) 50 Chloride 250 Manganese TVS TVS/WS Chlorine 0.019 0.011 Mercury(T) - 0.01 Cyanide 0.005 - Molybdenum(T) 150 Nitrate 10 Nickel TVS TVS Nitrite 0.05 Nickel(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies* varies* Zinc TVS TVS . The East and West Forks of the San Juan River, including all tributaries. from the boundary of the Weminuche Wilderness Area (West Fork) andt the source (East Fork) to the confluence of the mainstem of the San Juan Rive. except for thel listings in Segment 4. AII tributaries to the San Juan River from ap point below the confluence with the' West Fork to: a point below the confluence with Fourmile Creek. COSJSJ05 Classifications Physical and Biological Metals (ug/L) Designation Agriculture DM MWAT acute chronic Reviewable Aq Life Cold 1 Temperalure *C CS-I CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 0.02 Water Supply D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spawning) 7.0 Cadmium(T) 5.0 Other: pH 6.5-9.0 Chromium III TVS Temporary Modification(s): chlorophyll a (mg/m2) 150* Chromium III(T) 50 Arsenic(chronic) hybrid E. Coli (per 100 mL) 126 Chromium VI TVS TVS Expiration Date of 12/31/2024 Copper TVS TVS chlorophyll a (mg/m2).chronic): - applies only above Inorganic (mg/L) Iron - WS the facilities listed at 34.5(5). acute chronic Iron(T) 1000 Phosphorus(chtonio), - applies only above the facilities listed at 34,5(5). Ammonia TVS TVS Lead TVS TVS Uranium(acute) - See 34.5(3) for details. Boron 0.75 Lead(T) 50 Uranium(chronic) - See 34.5(3) for details. Chloride 250 Manganese TVS TVS/WS Chlorine 0.019 0,011 Mercury(T) 0.01 Cyanide 0.005 - Molybdenum(T) 150 Nitrate 10 Nickel TVS TVS Nitrite - 0.05 Nickel(T) 100 Phosphorus - 0.11* Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies* varies* Zinc TVS TVS(sc) All metals are dissolved unless otherwise noted. D.O. - dissolved oxygen T= = total recoverable DM = daily maximum t= total MWAT: - maximum weekly average temperature tr-trout See 34.6 for further details on applied standards. sc-sculpin REGULATION #34 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS San Juan River Basin All metals are dissolved unless otherwise noted, D,O,= dissolved oxygen T: = total recoverable DM: = daily maximum t= total MWAT: = maximum weekly average temperature tr=trout See 34.6 for further details on applied standards. sc-scuipin REGULATION #34 STREAM CLASSIPICATIONS and WATER QUALITY STA ANDARDS Animas and Floricta River Basins inuill r - 1 ing ida RvEi arg aweuangs vn ns wtnws wer : nes3 Frea, Mainster Grasshopper Creekincluding Mbutanes and wetnds froms source toconttiencewith. Anmas-River ManstemtmaCrk incluning rbutanas andwatlands trom sourcet tocunfl ent with Case ade Creek cos AF01 Classifications Physical and Biolonical Matals lug/L) Designation Agrcuiture DM MWAT - acute chronic OW Ac! Life Cold Temperature C CS-I CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 002 Water Supolv D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spawning) 79 Cadmium(T) 5.0 Other: PH 6.5-9.0 Chromium III TVS chlorophyll a img/m2) 150 Chromium II(T) 50 Uraniumfacut ) See 34. 5(3) for details E. Coli (per 1001 mL) 126 Chromium VI TVS TVS Uraniums shronic) = See 34.5(3) for details. Copper TVS TVS Inorganic (mg/L) Iron WS acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron 0,75 Lead(T) 50 Chloride 250 Manganese TVS TVS/WS Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 0.005 Molybdenum(T) 150 Nitrate 10 Nickel TVS TVS Nitrite - 0.05 Nickel(T) 100 Phosphorus : 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies" varies" Zinc TVS TVS 6 Mainstem of the Animas River from thes source to the outlet of Denver Lake. Mainstem, including all tributaries and wetlands of Cinnamon Creek, Grouse Gulch, Picayne Gulch, and Minnie Gulch: All tributaries and wetlands to the Animas River from immediately: above Maggie Gulch le- to a pointi immediately above Elk Creek except for those listed under segments 3c. 7.8: ana9 and 120 South Mineral Creek and allo olher tributaries andy wetlands to Mineral Creek. exceptf for those specifically listed in segments 8 and9 and 12c. COSJAF06 Classifications Physical and Biological Metals (ug/L) Designation Agriculture DM MWAT acute chronic Reviewable Aq Life Cold 1 Temperature "C CS-L CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 0.02 Water Supply D.0. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spawning) 7.0 Cadmium(T) 5.0 Other: pH 6.5-9.0 Chromium III TVS Temporary Modification(s): chlorophyll a (mg/m2) 150 Chromium III(T) 50 Arsenic(chronic) hybrid E. Coli (per 100 mL) 126 Chromium VI TVS TVS Expiration Date of 12/31/2024 Copper TVS TVS Inorganic (mg/L) Iron WS Uranium(acute) - See 34.5(3) for details. Uranum(chronic) See 34,5(3) tor details, acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron 0.75 Lead(T) 50 Chloride 250 Manganese TVS TVS/WS Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 0.005 Molybdenum() 150 Nitrate 10 Nickel TVS TVS Nitrite 0.05 Nickel(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies* varies* Zinc TVS TVS All metals are dissolved unless otherwise noted. D.O. dissolved oxygen T = total recoverable DM: = daily maximum t= total MWAT = maximum weekly average temperature tr=trout See 34.6 for further details on applied standards. sc=sculpin RE GULATION #34 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS Animas and Florida River Basins VE - oint imeciais aouls inec confher N E ninal My DN tluani Min - oua Pek a at I 9 aat 2L ane 5 Altrbutares o the Florica River From * - 5 D pels - c i e Mc Spony eek ex r the specific lsuny a OSJAF124 Classifications Physical and Biological Metals (ug/L) Designation Agnculture DM MWAT acute chronic Reviewable ALfe Coid Temperature "C CS-I CS-I Arsenic 340 Recreation E acute chronic Arrenic: T: 2.02 Water Supply D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D,0. (spawniny, 7,0 Cadmum(T) 5,0 Other: pH 6,5-9,0 Chromium III TVS Temporary Modifica ation(s): chlorophylil a (mg/m2) 150* Chromium III(T) 50 Arsenic(chronic) - hybrid E. Coli (per 100 mL) 126 Chromium VI TVS TVS Expiration Date of 12/31/2024 Copper TVS TVS chlorophyll a (mg/m2)chronic) = applies only Inorganic (mg/L) Iron WS above the facilities lisled at 34,5(5). acute chronic iron(T) 1000 Phosphorus(chronic): - applies only above the facilities listed at 34.5(5). Ammonia TVS TVS Lead TVS TVS Uranium(acute): See 34.5(3) for details. Boron 0.75 Lead(T) 50 Uranium(chronic) - See 34.5(3) for details. Chloride 250 Manganese TVS TVSWS Chlorine 0,019 0.011 Mercury(T) 0.01 Cyanide 0.005 - Molybdenum() 150 Nitrate 10 Nickel TVS TVS Nitrite 0.05 Nickel(T) 100 Phosphorus 0.11" Selenium TVS TVS Sulfate WS Silver TVS TVS(tr) Sulfide 0,002 Uranium varies* varies" Zinc TVS TVS 12c. Hermosa Creek including all tributaries. from the source toi immediately below the confluence with Long Hollow except for Ihe East Fork of Hermosa Creek, Mainstem ofE Bear Creek Induding ntutaresanawilans. tromits-source tot thes confluencewith! Mineral Creek Mainstemol Boulder Creek including Ibutaresands wetlands fromitss source to the fownstream public land boundary Mainsten Cascade Creek including tributaries ands wetlands from source 1o Taroma diversion. COSJAF12C Classifications Physical and Biological Metals (ug/L) Designation Agriculture DM MWAT acute chronic oW Aq Life Cold 1 Temperature "C CS-I CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 0,02 Water Supply D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spawning) 7.0 Cadmium(T) 5.0 Other: pH 6.5-9.0 Chromium IlI TVS chlorophyll a (mg/m2) 150 Chromium III(T) 50 Uranium(acute) - See 34.5(3) for details. E. Coli (per 100 mL) 126 Chromium' VI TVS TVS Uranium(chronic) See 34,5(3) for details. TVS Copper TVS Inorganic (mg/L) Iron WS acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron 0.75 Leau(T) 50 Chloride 250 Manganese TVS TVSAWS Chlorine 0,019 0.011 Mercury(T) - 0.01 Cyanide 0.005 Molybdenum(T) - 150 Nitrate 10 Nickel TVS TVS Nitrite - 0.05 Nickel(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate WS Silver TVS TVS(tr) Sulfide 01002 Uranium varics* varies' Zinc TVS TVS All metals are dissolved unless otherwise noted. D.O. = dissolved oxygen T=t total recoverable DM = daily maximum t= total MWAT: - maximum weekly average temperature tr=trout See 34.6 for further details on applied slandards. sc=sculpin REGULATION #34 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS Animas and Floricla River Basins All metals are dissolved unless otherwise noted. D.O. = dissolved oxygen T= total recoverable DM: = daily maximum t=t total MWAT - maximum weekly average temperature tr=trout See 34.6 for further details on applied standards. sc=sculpin REGULATION #34 STRE AM CLASSIFICATIONS and WATER QUALITY STANDARDS Dolores River Basin 51 rR.3- ra:c ne nat -n *t the Dolores Rive Mlanslem- of Spriny Crest IFA-the Seue to the boefltas Hn- Stoner Greek: Mains'es 1 oi t - nlu ay'o Those portio nsofBac Creek. Prestg ERLMIACRAS JPeK. including inbutaries ang.wellands rom ther sources01 their downstrear San JuanNationall + prest boundary Mainstem of the Dolores Rivez bweraadariaN from the source to a pomnt inmediatel below the ML withSnow Sour Creek exdep! forthe listingsin Segmenl COSJDO058 Classifications Physical and Biological Metals (ug/L) Designation Agn iculture DM MWAT acute chronic oW Aq Life Cold 1 Temperature 'C CS-I CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 002 Water Eupply D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spawnirg) 70 Cad dmium(T) 5.0 Other pH 6.5-9.0 Chromium III TVS Tempoiary Modification(s): chlorophyll a (mg/m2) 150 Chromium III(T) 50 Arsenic(chronic) - hybrid E. Coli (per 100 mL) 126 Chromium VI TVS TVS Expiration Date of 12/31/2024 Copper TVS TVS Inorganic Iron WS Uranium(acute) = See 34.5(3) for details. (mg/L) Uraniumychronic) See 34: 5(3) for details. acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron 0,75 Lead(T) 50 Chloride 250 Manganese TVS TVS/WS Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 0.005 Molybdenum(T) 150 Nitrate 10 Nickel TVS TVS Nitrite - 0.05 Nickel(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0,002 Uranium varies' varies* Zinc TVS TVS(sc) 2. Mainstem of the Dolores River fron thet source le- from a point immedialely below thes confluences with Snow Spur Greek to a point immedialely. above the confluence with Horse Creek. COSJDO02 Classifications Physical and Biological Metals (ug/L) Designation Agncullure DM MWAT acute chronic Reviewable Aql Life Cold 1 Temperature *C CS-I CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 0.02 Water Supply D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D,O. (spawning) 7.0 Cadmium(T) 5.0 Other: pH 6.5-9.0 Chromium III TVS Temporary Modification(s): chlorophyll a (mg/m2) 150 Chromium II(T) 50 Arsenic(chronic) - hybrid E. Coli (per 100 mL) 126 Chromium VI TVS TVS Expiration Date of 12/31/2024 Copper TVS TVS Inorganic Iron WS = (mg/L) Uranium(acute) See 34.5(3) for details. acute chronic Iron(T) 1000 Uranium(chronic), See 34.5(3) for details. Ammonia TVS TVS Lead TVS TVS Boron 0,75 Lead(T) 50 Chlaride ?50 Manganese TVS TVSWS Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 0.005 - Molybdenum(T) 150 Nitrate 10 : Nickel TVS TVS Nitrite - 0.05 Nickel(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies* varies* Zinc TVS TVS(sc) All metals are dissolved unless otherwise noted, D.O. - dissolved oxygen T=t total recoverable DM: = daily maximum t= total MWAT: - maximum weekly average temperature tretrout See 34.6 for further details on applied standards. sc=sculpin REGULATION #34 STREAM CLASSIFICATIONS anci WATER QUALITY STANDARDS Dolores RiverBasin 10a Janser NEtES as Rver Fun zard deat Midersess rea bou ndary to C surauen winFisn excepi for hulistings in Segment1 COSJDCI 04 Classifications Physical and Biological Metais lug/L) Designation Agrilnilie OM MWA acute chronic Revi-waple Aq Life Cold 1 Temperature 'C CS-I CS-I Arsenic 340 Recieation E acute chronic ArsenicT) 0.02 Water Sunely D.O. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O: (spawning) 9 CaumiumT) 5.0 Other: pH 6.5-9,0 Chromium III TVS chlorophyll a (mg/m2) 50 Chromium IT 50 Manganeseichronte, WWS, TVS ind 50 ug/L E.C Coli (per 100 mL) 126 Chromium VI TVS TVS Uranum(acute): = See 34,5(3) for details. Copper TVS TVS Uranium(chronic See 34,5(3) for details: Inorganic (mg/L) Iron WS acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron 0.75 LeadT) 50 Chloride 250 Manganese TVS varies* Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 0,005 Molybdenum(T) 150 Nitrate 10 a Nickel TVS TVS Nitrite - 0.05 Nickei(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0,002 Uranium varies* varies* Zinc TVS TVS Allb tnbutaries andwellandst to the Dolores River and West Dolores River noluding ally wellands trbutanes, which are within the Lizard Head Wilderness area. Mainstemo oft they West Farks ofthe Dolores River includings wetlands trom zardHead Widemesst Boundary to the andgeat County Road 38 Mainstems of Conl Creek ands Slate Creeki including Iributaries andy wetlands. from Ihe boundary, of IheLizard Head Wilderness Areat tot their confluences with the Dolores River COSJDO01 Classifications Physical and Biological Metals (ug/L) Designation Agricullure DM MWAT acute chronic OW Aql Life Cold 1 Temperature PC CS-I CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 0.02 Water Supply D.0. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spawning) 7.0 Cadmium(T) 5.0 Other: pH 6.5-9.0 Chromium III TVS Temporary Modification(s): chlorophyl! a (mglm2) 150 Chromium II(T) 50 Arsenic(chronic) - hybrid E. Coli (per 100 mL) 126 Chromium' VI TVS TVS Expiralion Date of 12/31/2024 Copper TVS TVS Inorganic Iron WS = "Uranium(acute) See 34.5(3) for details. (mg/L) Uranium(chronic) : See 34.5(3) for details. acute chronic Iron(T) 1000 Ammonia TVS TVS Lead TVS TVS Boron - 0.75 Lead(T) 50 Chloride 250 Manganese TVS TVSWS Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 0,005 Molybdenum(T) 150 Nitrate 10 : Nickel TVS TVS Nitrite - 0.05 Nickel(T) 100 Phosphorus : 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies* varies* Zinc TVS TVS(sc) All metals are dissolved unless otherwise noted. D.O. dissolved oxygen T=t total recoverable DM = daily maximum t= total MWAT = maximum weekly average temperature tr=trout See 34.61 for further details on applied standards. sc=sculpin RE GULATION #34 STRE.AM CLASSIF ICATIONS and WA TER QUALITY STANDARDS Dolores River Basin Mainstem ofc Coal Greek frens thr oundary nr 5e tzare Heag Malderness Area to the-sonfluence Wi th the Doler 5 River Duleted cos SJDO07 Clas sifir ations Physical and Bioloyicui Metais (ugi-) Designatio Agriculture DM MWAT acute chronic Reviewable Aq Life Cold- 4 Temperature "C GSI GS Arsenic 340 RecreationE acute chronic Arsenic T) 9.02 Water Supply D.0.( (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.O. (spa vning) 79 Cadmium(T) 5-0 Other: pH 65 0 Chromium III PVS chloraphyll a (mg/m2) 150 Chromium III(T) 50 Vraniun(acute = See 34.5(31 for detailsr E. Coli (per 100 mL) 126 Chromium VI TVS TVS VranumlChrone - See 34.5 5(3) sordetails Copper TVS TVS Inorganic (mg/L) Iron WS acute chronic Iron(T) 1000 Ammonia TVS TVS Lead PVS TVS Boron 0.75 Lead(T) 50 Chloride 250 Manganese TVS TVSANS Chlorine 0.019 0.011 Mercury(T) 0.01 Cyanide 9.005 Molybdenum() 150 Nitrate 10 Nickel MVS TVS Nitrite 0.05 Nickel(T) 100 Phosphorus 0.11 Selenium PVS TVS Sulfate S Silver MVS TVSA) Sulfide 0.002 Uranium varies: varies Zinc TVS TVSIsc) 6. Mainstem of the Slate Creek and Coke Oven Creek. from the Lizard Head Wilderness Area boundary to their its con fluences with the! Dolores River. COSJDO06 Classifications Physical and Biological Metals (ug/L) Designation Agriculture DM MWAT acute chroniç Reviewable Aq Life Cold 1 Temperature "C CS-1 CS-I Arsenic 340 Recreation E acute chronic Arsenic(T) 0.02 Water Supply D.0. (mg/L) 6.0 Cadmium TVS TVS Qualifiers: D.0. (spawning) 7.0 Cadmium(T) 5.0 Other: pH 6.5- 9.0 Chromium III TVS chlorophyll a (mg/m2) 150 Chromium III(T) 50 Uranium(acute) = See 34.5(3) for details. E. Coli (per 100 mL) 126 Chromium VI TVS TVS Uranium(chronic) - See 34 5(3) for details. Copper TVS TVS Inorganic (mg/L) Iron - WS acute chronic Iron(T) - 1000 Ammonia TVS TVS Lead TVS TVS Boron 0.75 leadT) 50 Chloride 250 Manganese TVS TVS/WS Chlorine 0.019 0.011 Mercury(T) - 0.01 Cyanide 0.005 - Molybdenum(T) 150 Nitrate 10 Nickel TVS TVS Nitrite 0.05 Nickel(T) 100 Phosphorus - 0.11 Selenium TVS TVS Sulfate - WS Silver TVS TVS(tr) Sulfide 0.002 Uranium varies* varies" Zinc TVS TVS All metals are dissolved unless otherwise noted. D.O. - dissolved oxygen T= total recoverable DM: = daily maximum t=t total MWAT: = maximum weekly average temperature tr=trout See 34.61 for further details on applied standards. sc=sculpin REGULATION #34 STRF AM CLASSIFICATIONS and WATER QUALITY STANDARDS Dolores River Basin All metais are dissolved unless otherwise noted. D.O. - dissolved oxygen T=t total recoverable DM = daily maximum t=t total MWAT - maximum weekly average temperature tr-trout See 34.6 for further details on: applied slandards. sc=sculpin STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS - FOOTNOTES (A) Whenever a range of standards is listed and referenced to this footnote, the first number in the range is a strictly health-based value, based on the Commission's established methodology for human health-based standards. The second number in the range is a maximum contaminant level. established under the federal Safe Drinking Water Act that has been determined to be an acceptable level of this chemical in public water supplies, taking treatability and laboratory detection limits into account. Control requirements, such as dis charge permit effluent limitations, shall be established using the first number in the range as the ambient water quality target, provided that no effluent limitation shall require an end-of-pipe" discharge level more restrictive than the second number in the range. Water bodies will be considered in attainment of this standard, and not included on the Section 303(d) List, SO long as the existing ambient quality does not exceed the second number in the range. (B) Assessment of adequate refuge shall rely on the Cold Large Lake table value temperature criterion and applicable dissolved oxygen standard rather than the site-specific temperature standard. (C) For certain site-specific temperature standards, the temperature excursions listed in Table 1- Footnote 5(c) of 31.16 do not apply. Assessment of ambient-Dased temperature standards should be conducted in a way that represents similar conditions to those under which the criteria were developed (i.e., air, low flow, and warming event excursions should not apply). Similarly, where site-specific adjustments to the winter shoulder season have been adopted, the winter shoulder season excursion does not apply. / John II. Wy right, C.P.G. P. 0. Box 308 Silverton, CO 81433 (970) 387-0257 February 22, 2022 Commissioners of San Juan County, and Silverton Board of Trustees RE: OHV Route Modification Greetings Commissioners and Trustees. Last Friday afternoon, Commissioner Kuhlman engaged me while we were both visiting the post office, asking me how I felt about opening the truck by-pass just below the cemetery to OHV traffic. I remembered when it was first opened to OHV traffic, and that was some time before OHVS were allowed into town. Initially, I had 10 objections to a re-opening oft the by-pass for OHV traffic. but I had not had much time to re-think the issuc during our bricf visit at the post office. I have second thoughts about re-opening the truck by-pass now. They are these: 1. The first opening years ago was like the camel's nose working its way under thc tent - it eventually made it all the way into town and brought excessive noise and irritation to my household as lines of OHVs revved their engines to make it up the hill by my house. I seek to avoid a recurrence of that. 2. As I advised the commissioners on another, similar matter involving traffic along the lower river road, the desires of individual property owners along that road should be given special weight in consideration of an altered use of that road. Same way with re- opening the truck by-pass. There is developable residential land along that route. Noisy, dusty traffic along that route will be a deterrent to residential development. That is the voice of experience, as I lost more than one potential sale of my place when prospective buyers experienced the raucous sound of OHVS running along the hill by my house. 3. In line with Point 2 above, when there is a new land use proposed, such as re-opening the truck by-pass, the Town and/or the County should contact proximal land owners with a formal statement of proposal. including maps clearly indicating the location of the proposed land use, for their comment. That is a requirement for any newly proposed land use in the county, and this should be no different. Again, the voice of experience: that courtesy was never afforded me when the initial proposed OHV route through town was put forth that did not include the segments of Greene Street and what had become CR 110 (formerly Colorado 110) around Memorial Park and up the hill by my house. Since I wasn tj proximal Io the then proposedioute. I nad no objection. Instead. L went away for a two-week, job in Nevada. On my Teturn, I learned that during my absence the proposed route had been approveu to nclude that segment of Greene Street and CR 119 - without any notice or inquiry to me as an affected party. Proper service of a proposed new land use to proximal land owners for comment is appropriate. Use ofthe local newspaper to get out the word is ineffective. Sincerely, yn Mati