MS4 Route Mapping PRIORITIZATION PARAMETERS

Approx. ADOT Named or Average Annual Length Year Age OAW/Impaired/ Not‐ Within 1/4 Pollutants ADOT Designated Pollutants Route ADOT Districts Annual Traffic Receiving Waters TMDL? Given Precipitation (mi) Installed (yrs) Attaining Waters? Mile? (per EPA) Pollutant? Uses (per EPA) (Vehicles/yr) WLA? (inches)

SR 24 (802) 1.0 2014 5 Central 11,513,195 Queen Creek N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 51 16.7 1987 32 Central 61,081,655 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 61 76.51 1935 84 Northeast 775,260 Little Colorado River Y (Not attaining) N E. Coli N FBC Y E. Coli N 7 Sediment Y A&Wc Y Sediment N SR 64 108.31 1932 87 Northcentral 2,938,250 Colorado River Y (Impaired) N Sediment Y A&Wc N ‐‐ ‐‐ 8.5 Selenium Y A&Wc N ‐‐ ‐‐ SR 66 66.59 1984 35 Northwest 5,154,530 Truxton Wash N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 7 SR 67 43.4 1941 78 Northcentral 39,055 House Rock Wash N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 17 Kanab Creek N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 68 27.88 1941 78 Northwest 5,557,490 Colorado River Y (Impaired) Y Temperature N A&Ww N ‐‐ ‐‐ 6 SR 69 33.87 1938 81 Northwest 17,037,470 Granite Creek Y (Not attaining) Y E. Coli N A&Wc, FBC, FC, AgI, AgL Y E. Coli Y 9.5 Watson Lake Y (Not attaining) Y TN Y ‐‐ Y TN Y DO N A&Ww Y DO Y pH N A&Ww, FBC, AgI, AgL Y pH Y TP Y ‐‐ Y TP Y SR 71 24.16 1936 83 Northwest 296,015 Sols Wash/Hassayampa River Y (Impaired, Not attaining) Y E. Coli N FBC N ‐‐ ‐‐ 7 Selenium Y A&Ww Y Selenium N Alamo Lake Y (impaired) N Ammonia N A&Ww N ‐‐ ‐‐ Mercury Y FC N ‐‐ ‐‐ pH N FBC, AgL, A&Ww N ‐‐ ‐‐ SR 72 36.74 1930 89 Southwest 1,173,110 Bouse Wash N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 4 SR 73 46.79 1927 92 Northeast 5,114,745 White River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 11 SR 74 31.02 1964 55 Central 10,199,195 Agua Fria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 8 SR 75 19.39 1932 87 Southeast 1,019,080 Gila River Y (Not attaining) Y E. Coli N FBC Y E. Coli N 6 Southcentral, Northeast, SR 77 253.93 1941 78 20,326,485 Santa Cruz River Y (Impaired, Not attaining) N Cadmium Y A&Wedw N ‐‐ ‐‐ 9 Southeast E. Coli N FBC N ‐‐ ‐‐ San Pedro River Y (Not attaining) Y E. Coli N FBC Y E. Coli N Gila River Y (Impaired) Y Sediment Y A&Ww N ‐‐ ‐‐ Salt River Y (Impaired) N E. Coli N FBC N ‐‐ ‐‐ Little Colorado River Y (Not attaining) N Sediment Y A&Wc Y Sediment N SR 78 19.47 1959 60 Southeast 120,085 Gila River Y (Not attaining) N E. Coli N FBC Y E. Coli N 8 Sediment Y A&Ww N ‐‐ ‐‐ SR 79 58.4 1992 27 Southcentral 4,898,665 Santa Cruz River Y (Impaired, Not attaining) N Cadmium Y A&Wedw N ‐‐ ‐‐ 7 E. Coli N FBC N ‐‐ ‐‐ Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 79 Business 2.05 1992 27 Southcentral 3,891,630 Gila River N ‐‐ ‐‐ ‐‐ ‐‐‐‐‐‐‐‐6 SR 80 120.23 1989 30 Southeast, Southcentral 3,482,465 Mule Gulch Y (Impaired) Y Copper Y PBC, A&Wedw N ‐‐ ‐‐ 6 San Pedro River Y (Impaired) Y E. Coli N FBC N ‐‐ ‐‐ Y Copper Y A&Ww N ‐‐ ‐‐ SR 82 65.74 1927 92 Southcentral 2,954,310 Nogales Wash Y (Impaired) Y Ammonia N A&Ww N ‐‐ ‐‐ 6.5 Chlorine N A&Ww N ‐‐ ‐‐ Copper Y A&Ww N ‐‐ ‐‐ E. Coli N PBC N ‐‐ ‐‐ Cienega Creek Y (OAW) N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Sonoita Creek Y (Impaired) Y DO N A&Ww N ‐‐ ‐‐ Zinc Y A&Ww N ‐‐ ‐‐ Upper Alum Gulch Y (Not attaining) Y Cadmium Y A&We, PBC, AgL Y CadmiumN Copper Y A&We, PBC, AgL Y Copper N Zinc Y A&We, PBC, AgL Y Zinc N pH N A&We, PBC, AgL Y pH N 3R Canyon Y (Not attaining) Y Beryllium N A&Ww, A&We, PBC, FBC, AgL Y Beryllium N Cadmium Y A&Ww, A&We, PBC, FBC, AgL Y Cadmium N Copper Y A&Ww, A&We, PBC, FBC, AgL Y Copper N Zinc Y A&Ww, A&We, PBC, FBC, AgL Y Zinc N pH N A&Ww, A&We, PBC, FBC, AgL Y pH N San Pedro River Y (impaired) Y E. Coli N FBC N ‐‐ ‐‐ SR 83 53.63 1927 92 Southcentral 1,197,930 Parker Canyon Lake Y (impaired) Y Mercury Y FC N ‐‐ ‐‐ 7.5 Babocomari River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Cienega Creek Y (OAW) N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Santa Cruz River Y (Impaired, Not attaining) N Cadmium Y A&Wedw N ‐‐ ‐‐ E. Coli N FBC N ‐‐ ‐‐ SR 84 23.68 1927 92 Southcentral 3,378,440 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 4.5 SR 85 128.86 1936 83 Southcentral, Southwest 7,756,250 Gila River Y (Not attaining) Y Selenium Y A&Wedw Y Selenium Y 4 SR 86 118.11 1930 89 Southcentral 13,494,050 Santa Cruz River Y (Impaired, Not attaining) N Cadmium Y A&Wedw N ‐‐ ‐‐ 5.5 E. Coli N FBC N ‐‐ ‐‐ Gila River Y (Not attaining) N Selenium Y A&Wedw Y Selenium Y San Simon Wash N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Southcentral, Central, SR 87 272.66 1927 92 13,021,740 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 9 Northcentral, Northeast Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ MS4 Route Mapping PRIORITIZATION PARAMETERS

Verde River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ East Verde River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Tonto Creek Y (Impaired) N Mercury Y FC N ‐‐ ‐‐ SR 88 45.67 1927 92 Central, Southeast 4,918,010 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 9.5 Canyon Lake Y (Impaired) N DO N A&Ww N ‐‐ ‐‐ Apache Lake Y (Impaired) Y DO N A&Ww N ‐‐ ‐‐ Mercury Y FC N ‐‐ ‐‐ Roosevelt Lake Y (Impaired) Y Mercury Y FC N ‐‐ ‐‐ SR 89 104.53 1992 27 Northwest 10,028,375 Hassayampa River Y (Not attaining) N Cadmium Y A&Ww, FBC, FC, AgI, AgL Y Cadmium N 9 Copper Y A&Ww, FBC, FC, AgI, AgL Y Copper N Zinc Y A&Ww, FBC, FC, AgI, AgL Y Zinc N pH N A&Wc, FBC, AgI, AgL N ‐‐ ‐‐ Granite Creek Y (Impaired, Not attaining) Y DO N A&Wc N ‐‐ ‐‐ E. Coli N FBC Y E. Coli Y Watson Lake Y (Not attaining) Y TN Y ‐‐ Y TN Y DO N A&Ww Y DO Y pH N A&Ww, FBC, AgI, AgL Y pH Y TP Y ‐‐ Y TP Y Verde River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 89A 83.85 1992 27 Northwest, Northcentral 14,813,525 Agua Fria River N ‐‐‐‐‐‐‐‐‐‐‐‐‐‐ 12 Verde River Y (Impaired) Y Turbidity Y A&Ww Y Turbidity N Oak Creek Y (OAW, Impaired) Y Turbidity Y A&Ww Y Turbidity N E. Coli N FBC Y E. Coli N Oak Creek Y (OAW, Not attaining) Y E. Coli N FBC Y E. Coli N SR 90 46.77 1957 62 Southeast, Southcentral 7,251,820 San Pedro River Y (Impaired) Y Copper Y A&Ww N ‐‐ ‐‐ 5.5 E. Coli N FBC N ‐‐ ‐‐ Babocomari River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 92 33.91 1935 84 Southeast, Southcentral 9,139,965 San Pedro River Y (Impaired) Y Copper Y A&Ww N ‐‐ ‐‐ 6.5 E. Coli N FBC N ‐‐ ‐‐ SR 95 116.46 1970 49 Southwest, Northwest 15,167,575 Colorado River N ‐‐‐‐‐‐‐‐‐‐‐‐‐‐ 4.5 SR 96 21.79 1962 57 Northwest 502,240 Santa Maria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐9 SR 97 10.91 1962 57 Northwest 330,325 Santa Maria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐8 SR 98 66.89 1974 45 Northcentral 2,560,110 Lake Powell Y (Impaired) N Mercury Y FC N ‐‐ ‐‐ 5 Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 99 44.31 1970 49 Northcentral 267,180 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 4 Loop 101 60.98 1988 31 Central 71,967,780 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 New River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Agua Fria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 143 3.93 1957 62 Central 35,502,455 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 169 15.16 1971 48 Northwest 2,811,595 Agua Fria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 10 SR 177 31.69 1953 66 Southeast 1,323,125 Gila River Y (Impaired) Y Sediment Y A&Ww N ‐‐ ‐‐ 10.5 Arnett Creek Y (Impaired) Y Copper Y A&Ww N ‐‐ ‐‐ Queen Creek Y (Impaired) Y Copper Y A&Ww N ‐‐ ‐‐ SR 179 14.49 1962 57 Northcentral 5,028,970 Verde River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐10 Oak Creek Y (OAW, Impaired) Y Turbidity Y A&Ww Y Turbidity N SR 180A 11.18 1974 45 Northeast 73,730 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 5 SR 181 26.8 1970 49 Southeast 348,940 Wilcox Playa N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 186 33.39 1955 64 Southeast 1,884,860 Wilcox Playa N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 187 5.43 1944 75 Southcentral 1,000,100 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 188 60.85 1959 60 Southeast 1,158,145 Roosevelt Lake Y (Impaired) Y Mercury Y FC N ‐‐ ‐‐ 10 Apache Lake Y (Impaired) Y DO N A&Ww N ‐‐ ‐‐ Tonto Creek Y (Impaired) Y Mercury Y FC N ‐‐ ‐‐ Pinto Creek Y (Impaired, Not attaining) Y Copper Y A&Ww, FBC, FC, AgI, AgL Y Copper N SR 189 3.75 1956 63 Southcentral 9,077,550 Nogales Wash Y (impaired) Y Ammonia N A&Ww N ‐‐ ‐‐ 8 Chlorine N A&Ww N ‐‐ ‐‐ Copper Y A&Ww N ‐‐ ‐‐ E. Coli N PBC N ‐‐ ‐‐ SR 195 22.08 2009 10 Southwest 8,803,070 Colorado River Y (impaired) N Selenium Y A&Ww N ‐‐ ‐‐ 2 N DO N A&Ww N ‐‐ ‐‐ Loop 202 57.17 1990 29 Central 75,617,780 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 202S 1.22 1993 26 Central 16,316,960 Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 SR 210 3.96 1998 21 Southcentral 10,183,135 Santa Cruz River Y (Impaired, Not attaining) N Cadmium Y A&Wedw N ‐‐ ‐‐ 6 E. Coli N FBC N ‐‐ ‐‐ SR 238 20.27 1986 33 Central 2,172,845 Gila River Y (Not attaining) N Selenium Y A&Wedw Y Selenium Y 4 SR 260 217.78 1970 49 Northeast, Northcentral 11,894,255 Little Colorado River Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N 15 White River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Verde River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Verde River Y (Impaired) N Turbidity Y A&Ww Y Turbidity N Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Christopher Creek Y (Impaired, Not attaining) Y DO N A&Wc N ‐‐ ‐‐ E. Coli N FBC Y E. Coli N Tonto Creek Y (Not attaining) Y TN Y A&Wc, A&Ww, FBC, FC, AgL, AgI YTNN Mercury Y FC N ‐‐ ‐‐ SR 261 17.92 1991 28 Northeast 112,785 Crescent Lake Y (Impaired) Y ph N AgL, AgI, FBC, A&Wc N ‐‐ ‐‐ 12 MS4 Route Mapping PRIORITIZATION PARAMETERS

Little Colorado River Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N SR 264 154.35 1961 58 Northeast 7,054,355 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 5.5 Puerco River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Chinle Creek N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 266 19.18 1957 62 Southeast 91,980 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 7.5 SR 273 19.26 1957 62 Northeast 191,990 White River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 17.5 Little Colorado River Y (Not attaining) N Turbidity Y A&Wc Y Turbidity N Cresecent Lake Y (Impaired) Y pH N A&Wc, FBC, AgI, AgL N ‐‐ ‐‐ SR 277 30.66 1962 57 Northeast 1,960,050 Little Colorado River Y (Not attaining) N E. Coli N FBC Y E. Coli N 7 Sediment Y A&Wc Y Sediment N SR 286 45.04 1955 64 Southcentral 430,335 Santa Cruz River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 SR 287 32.07 1932 87 Southcentral 10,769,690 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐6 SR 288 52.56 1959 60 Southeast 269,005 Roosevelt Lake Y (impaired) Y Mercury Y FC N ‐‐ ‐‐ 14.5 SR 289 10.33 1960 59 Southcentral 423,035 Nogales Wash Y (impaired) Y Ammonia N A&Ww N ‐‐ ‐‐ 8 Chlorine N A&Ww N ‐‐ ‐‐ Copper Y A&Ww N ‐‐ ‐‐ E. Coli N PBC N ‐‐ ‐‐ Loop 303 35.25 1991 28 Central 18,164,590 Agua Fria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 347 28.69 1997 22 Central, Southcentral 15,247,875 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 5 SR 366 28.33 1960 59 Southeast 227,395 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 13.5 Grant Creek N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ SR 373 4.46 1961 58 Northeast 345,290 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 24.5 SR 377 33.83 1971 48 Northeast 987,690 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 5.5 SR 386 11.88 1967 52 Southcentral 58,400 Santa Cruz River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐‐‐ 8 SR 387 15.71 1967 52 Southcentral 8,049,710 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 4 SR 389 32.6 1960 59 Northcentral 1,591,400 Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐‐‐ 8 SR 473 9.91 1967 52 Northeast 66,795 White River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 21 SR 564 9.16 1970 49 Northeast 116,800 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 SR 587 6.1 1985 34 Central 3,343,035 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6 SR 989 2.04 1993 26 Southcentral 7,266,055 Santa Cruz River Y (Impaired, Not attaining) N Cadmium Y A&Wedw N ‐‐ ‐‐ 6 E. Coli N FBC N ‐‐ ‐‐

Northeast, Southeast, US 60 355.59 1932 87 Southcentral, Central, 89,896,580 Nutrisio Creek Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N 9 Northwest, Southwest Little Colorado River Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N Little Colorado River Y (Impaired) N E. Coli Y+ FBC Y E. Coli Y Sediment Y A&Wc Y Sediment Y Salt River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Pinto Creek Y (Not attaining) Y Copper Y A&Ww Y Copper N Five Point Mtn Tributary Y (Impaired) Y Copper Y A&We N ‐‐ ‐‐ Queen Creek Y (Impaired) Y Copper Y A&Ww N ‐‐ ‐‐ Lead Y PBC N ‐‐ ‐‐ Selenium Y A&Ww N ‐‐ ‐‐ New River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Agua Fria River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Hassayampa River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ US 64 4.14 1989 30 Northeast 958,490 San Juan River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 4 US 70 122.13 1934 85 Southeast 7,482,135 Gila River Y (Not attaining) Y E. Coli N FBC Y E. Coli N 7 Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ US 89 136.33 1926 93 Northcentral 11,872,355 Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐‐‐‐‐ 5 Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ US 89A 178.33 1960 59 Northcentral 2,296,945 Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 7.5 Kanab Creek Y (Impaired) N Selenium Y A&Ww, FBC, DWS, FC, AgL N ‐‐ ‐‐ US 93 176.3 1935 84 Northwest 9,131,570 Hassayampa River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 6.5 Alamo Lake Y (impaired) N Ammonia N A&Ww N ‐‐ ‐‐ Mercury Y FC N ‐‐ ‐‐ pH N FBC, AgL, A&Ww N ‐‐ ‐‐ Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ US 95 104.18 1960 59 Southwest 16,406,020 Colorado River Y (Impaired) Y Selenium Y A&Ww N ‐‐ ‐‐ 3 Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ US 160 159.33 1970 49 Northeast, Northcentral 5,188,110 Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 5 San Juan River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ US 163 23.21 1970 49 Northeast 4,972,030 San Juan River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐4 US 180 164.1 1961 58 Northeast, Northcentral 5,318,415 San Francisco River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 8 Nutrisio Creek Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N Little Colorado River Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N Little Colorado River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Little Colorado River Y (Not attaining) N Sediment Y A&Wc Y Sediment Y US 191 396.18 1982 37 Southeast, Northeast 4,100,410 Whitewater Draw N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 9 Wilcox Playa N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Gila River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Gila River Y (Not attaining) Y E. Coli N FBC Y E. Coli N MS4 Route Mapping PRIORITIZATION PARAMETERS

San Francisco River Y (Impaired) Y E. Coli N FBC N ‐‐ ‐‐ Blue River Y (Impaired) N E. Coli N FBC N ‐‐ ‐‐ Nutrisio Creek Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N Little Colorado River Y (Not attaining) Y Turbidity Y A&Wc Y Turbidity N Zuni River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ Puerco River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ San Juan River N ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐

+ E. Coli is considered an ADOT pollutant on US 60 ONLY, due to the presence of multiple rest areas ++ Port of Entry (at the border and along either a State Route or US Route)

Legend:

: 200+ miles : 100‐199 miles : 50‐99 miles

: 75‐100 yrs old : 50‐74 yrs old : 25‐49 yrs old

: 50 million+ vehicles per year : 25‐49,999,999 million vehicles per year : 10‐24,999,999 million vehicles per year : 1‐9,999,999 million vehicles per year : 500,000‐999,999 vehicles per year

: Within 1/4 mile of impaired water : Within 1/4 mile of not‐attaining water : Within 1/4 mile of OAW : Within 1/4 mile of impaired water & ADOT contributes pollutants of concern : Within 1/4 mile of impaired water, ADOT contributes pollutants of concern, & ADOT has TMDL WLAs for those pollutants

: 20+ annual inches of precipitation : 15‐19 annual inches of precipitation : 10‐14 annual inches of precipitation

: Serves a POE