I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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Introduction October 2005 CHAPTER 1: INTRODUCTION This environmental assessment (EA) is being prepared to comply with the National Environmental Policy Act (NEPA) of 1969 and the policies of the Federal Highway Administration (FHWA), as the lead federal agency. The EA process provides steps and procedures to evaluate the potential social, economic, and environmental impacts of a proposed action while providing an opportunity for public and local, state, or other agencies to provide input and/or comment. In addition, this EA provides FHWA and the Arizona Department of Transportation (ADOT) a detailed analysis to better examine and consider the level of impacts on any sensitive social, economic, and environmental resources and assists in the decision-making process. A companion document to this EA has been prepared. The companion document is entitled Interstate 10 Traffic Interchange at Twin Peaks Road/Linda Vista Boulevard Initial Location Design Concept Report (DCR). The DCR is a document prepared for ADOT, which documents the design concept for proposed improvements, substantiates recommendations, documents alternatives considered, and identifies environmental effects. The DCR contains a higher level of engineering design detail than this EA and readers who desire that level of detail are referred to that document. Explanation of Project The existing Interstate 10 (I-10) traffic interchanges (TI) at Avra Valley Road and Cortaro Road are approximately four miles apart; therefore, the Town of Marana, as part of its Marana Master Transportation Plan, proposed a new major arterial roadway that would cross the I-10 Corridor in the vicinity of Twin Peaks Road and provide additional access to and from I-10. ADOT’s I-10 General Plan, Ruthrauff Road to Tangerine Road (General Plan) proposed the construction of a new I-10 TI in the vicinity of Twin Peaks Road, Linda Vista Boulevard, and El Camino de Mañana that would be an extension of the existing Twin Peaks Road in Marana. The General Plan also proposed a gradeseparated crossing of this roadway with the Union Pacific Railroad (UPRR) because only one other grade-separated railroad crossing (Orange Grove Road) existed between Ruthrauff Road and Tangerine Road. According to Pima Association of Governments’ (PAG) 2025 Regional Transportation Plan, the new TI and roadway would serve a substantial amount of traffic both crossing and accessing I-10. The proposed project would construct a new I-10 TI at Twin Peaks Road (hereinafter referred to as the Twin Peaks Road TI) approximately midway between the Avra Valley Road TI (milepost [MP] 242) and the Cortaro Road TI (MP 246) and would connect Twin Peaks Road on the west to El Camino de Mañana/Linda Vista Boulevard on the east. The proposed project location and vicinity are presented in Figures 1-1 and 1-2, respectively. Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 1-1 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
N 95 Yuma Yuma San Luis Hoover Dam Bullhead Bullhead City City 95 68 Topock 95 95 40 Lake Lake Havasu Havasu City City 95 Ehrenberg 95 93 L A P A Z Y U M A M O H A V E C O C O N I N O 85 85 60 8 303 89 Y A V A P A I 101 M A R I C O P A Ajo Ajo Why Mobile Mobile Cottonwood Cottonwood Cordes Cordes Juction Juction 10 101 87 P I N A L 202 60 Eloy Eloy P I M A 287 87 10 89 89 87 60 87 Page Parker Parker Payson Quartzsite Quartzsite Wellton Wellton Kingman Kingman Littlefield Littlefield Peach Springs STATE HIGHWAY SYSTEM OF ARIZONA ARIZONA DEPARTMENT OF TRANSPORTATION INTERMODAL TRANSPORTATION DIVISION 0 25 50 75 100 MILES 72 15 8 93 10 60 66 40 Colorado City 97 PROJECT NAME Seligman Seligman PROJECT NUMBER TRACS NO. 71 96 389 Wickenburg Wickenburg Gila Gila Bend Bend Ash Ash Fork Fork Chino Chino Valley Valley Prescott Prescott 89 85 Lukeville Fredonia Fredonia Jacob Lake Grand Canyon 86 Clarkdale Clarkdale Jerome Jerome 69 74 Phoenix Phoenix 238 64 Prescott Prescott Valley Valley Williams Williams 347 89A 17 67 North Rim Sedona Sedona 51 84 180 89A 179 Camp Camp Verde Verde 587 387 Casa Casa Grande Grande 386 89 Flagstaff Flagstaff 87 89 88 Coolidge Sasabe Sasabe Tuba City 40 Payson Superior Florence Florence 86 289 Roosevelt Roosevelt Apache Apache Junction Junction Robles Junction 286 188 10 160 Leupp 260 Young Miami Miami Kearny 79 98 87 Winlsow Hayden Hayden 19 STATE MAP 264 99 288 77 Mammoth Mammoth 77 Tuscon Tucson 189 Nogales 77 10 40 60 264 N A V A J O G I L A Sonoita Patagonia Patagonia 99 564 Globe Globe Winkelman 83 SANTA CRUZ Kayenta Kayenta 260 Second Mesa 87 Joseph City 377 Snowflake 82 60 70 10 366 266 A P A C H E 189 A 260 G R A H A M Benson Benson 90 163 277 Sierra Sierra Vista Vista 92 160 73 Holbrook Holbrook 77 Taylor Fort Grant Bonita Bonita 90 Show Show Low Low Pinetop Pinetop 80 77 Pima Pima Willcox Willcox Bisbee Bisbee Safford Safford Thatcher 191 Chinle Ganado Window Rock 40 191 Bowie 186 191 Eagar Eagar Clifton Clifton Sanders Alpine Alpine 191 GREENLEE Morenci Morenci C O C H I S E Tombstone Tombstone 80 191 61 473 191 191 Teec Nos Pos 180 191 273 264 St. St. Johns Johns 181 Douglas Douglas FIGURE 160 Springerville Springerville 78 61 180 San San Simon Simon 80 75 Duncan Duncan 70
Page 1: Interstate 10 Traffic Interchange a
Page 4 and 5: Draft Environmental Assessment Octo
Page 12 and 13: Mitigation Measures October 2005
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Page 16 and 17: Mitigation Measures October 2005 St
Page 20 and 21: AVRA VALLEY RD MARANA I-10 SCENIC D
Page 22 and 23: Introduction October 2005 Cortaro R
Page 24 and 25: Project Purpose and Need October 20
Page 34 and 35: Alternatives October 2005 CHAPTER 3
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Affected Environment and Environmen
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Interstate 10 Traffic Interchange a
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44.20 Avra Valley Rd Twin Peaks Rd
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Conclusion October 2005 Interstate
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Bibliography October 2005 CHAPTER 8
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Bibliography October 2005 Tetra Tec
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I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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