I-10 Twin Peaks Traffic Interchange, Environmental Assessment

More documents

Recommendations

Info

Project Purpose and Need October 2005 CHAPTER 2: PROJECT PURPOSE AND NEED Project Location The proposed project involves the construction of a Twin Peaks Road TI on I-10 in the northwestern portion of the Tucson metropolitan area of Pima County, Arizona. The proposed project would occur primarily within the incorporated area of the Town of Marana, but also within the unincorporated area of Pima County. The Twin Peaks Road TI would be located approximately midway between the Avra Valley Road TI (MP 242) and the Cortaro Road TI (MP 246). Background and Overview Two studies, the Marana Master Transportation Plan completed in December 1989 and ADOT’s I-10 Design Concept Study (DCR), Ruthrauff Road to the Pima/Pinal County Line completed in 1990, recommended a new I-10 TI between the I-10 interchanges at Cortaro and Avra Valley Roads. Both studies recommended that the new I-10 TI connect Twin Peaks Road to El Camino de Mañana/Linda Vista Boulevard. The Marana Master Transportation Plan, the first transportation plan developed for the Town of Marana, recommended the TI as part of a planned parkway consisting of four- and six-lane arterials that encircled the Marana Town Center (near MP 236). The Marana Master Transportation Plan recommended two new TIs: a southern TI at Twin Peaks Road and a northern TI at Hardin Road (approximately MP 234). The ADOT I-10 DCR originally recommended the Twin Peaks Road TI to achieve desirable interchange spacing; however, as residential and commercial development increased in the area, the Twin Peaks Road TI was later seen as an important “reliever” for growing traffic congestion at the Cortaro Road TI. The DCR and the subsequent ADOT I-10 General Plan, Ruthrauff Road to Tangerine Road (1993) (General Plan) recommended a preliminary TI design which connected Twin Peaks Road and El Camino de Mañana and provided a grade separation with the Southern Pacific Railroad (now the UPRR). FHWA requires that additions or revisions of access to the interstate system be justified in a Change of Access Report. As a result of the recommendations of the General Plan, the Change of Freeway Access Report, I-10 Corridor Improvements General Plan Ruthrauff Road to Tangerine Road, dated December 1991, was completed. This report contained an analysis of a Twin Peaks Road TI. The additional point of access to I-10 at Twin Peaks Road was approved in a memorandum from FHWA Administrator T.D. Larson on June 26, 1992, subject to the State’s compliance with applicable Federal requirements. One of these Federal requirements was to analyze the social, economic, and environmental effects of the improvement alternatives recommended in the General Plan. The Final Environmental Assessment I-10 Corridor Improvements General Plan Ruthrauff Road to Tangerine Road assessed 12 miles of I-10 between Tangerine Road Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 2-1 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
Project Purpose and Need October 2005 (MP 240.4) and Ruthrauff Road (MP 252.4) in 1993 (hereinafter this document is referred to as the 1993 EA). Based on the social, environmental, and economic analyses in the 1993 EA, the FHWA issued a Finding of No Significant Impact (FONSI) on October 29, 1993. Although a FONSI determination allows a project to proceed to design and construction, funding limitations have prevented project advancement until now. Because of the time that has elapsed since the FONSI was issued and the changes in conditions that have occurred, new environmental investigations are required. The 1993 EA stated that the purpose and need for improvements to I-10 between Tangerine Road and Ruthrauff Road was to: • correct roadway, ramp, and frontage road deficiencies in design; • correct undesirable levels of service within certain segments of the interstate and at several interchanges; • provide future capacity and prevent operational issues relating to insufficient capacity; and, • improve safety in high volume interchange areas, freeway segments on which traffic demands are approaching capacity conditions, and other areas. The interest in a Twin Peaks Road TI has not waned. The first assumption in future growth projections developed for the transportation model used for the 2001-2025 Marana Transportation Plan Update (Plan Update) was the construction of the Twin Peaks Road TI. At a public open house on the Plan Update in December 2000, the public’s highest transportation priority was to extend Twin Peaks Road to I-10 to relieve the congestion on Cortaro and Ina Roads. Project Need The Twin Peaks Road TI and associated improvements are needed to: • relieve existing and future congestion on Cortaro Road and Silverbell Road; • eliminate stormwater from the I-10 mainline and frontage roads; • correct issues related to roadways not meeting current design standards, and motor vehicle conflicts with the railroad; and, • improve bicycle and pedestrian and general transportation system connectivity. Each of these project needs is documented in detail in the following sections. Congestion Relief The need for a Twin Peaks Road TI has been discussed since the mid-1980s. Since that time, development patterns changed as a result of environmental restrictions. The major reason for these changing development patterns was the listing of the cactus ferruginous pygmy-owl (CFPO) as endangered in 1997. Much of the land considered highly desirable for residential development was located in habitat considered critical to the survival of the CFPO. As a result, the bulk of development shifted to areas outside those preferred by Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 2-2 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
Page 1: Interstate 10 Traffic Interchange a
Page 4 and 5: Draft Environmental Assessment Octo
Page 12 and 13: Mitigation Measures October 2005
Page 14 and 15: Mitigation Measures October 2005 19
Page 16 and 17: Mitigation Measures October 2005 St
Page 18 and 19: Introduction October 2005 CHAPTER 1
Page 20 and 21: AVRA VALLEY RD MARANA I-10 SCENIC D
Page 22 and 23: Introduction October 2005 Cortaro R
Page 26 and 27: Project Purpose and Need October 20
Page 34 and 35: Alternatives October 2005 CHAPTER 3
Page 36 and 37: Alternatives October 2005 Figure 3-
Page 38 and 39: Alternatives October 2005 • Shall
Page 40 and 41: Alternatives October 2005 Interstat
Page 42 and 43: Alternatives October 2005 Road). Pr
Page 44 and 45: Alternatives October 2005 Preferred
Page 46 and 47: Alternatives October 2005 Twin Peak
Page 48 and 49: Alternatives October 2005 I-10 Fron
Page 50 and 51: Alternatives October 2005 Linda Vis
Page 52 and 53: Alternatives October 2005 Twin Peak
Page 54 and 55: Alternatives October 2005 and sidew
Page 56 and 57: Alternatives October 2005 proposed
Page 58 and 59: Alternatives October 2005 Near the
Page 60 and 61: Avra Valley Rd. Twin Peaks Rd. Silv
Page 62 and 63: Affected Environment and Environmen
Page 74 and 75:
Affected Environment and Environmen
Page 76 and 77:
Page 78 and 79:
Interstate 10 Traffic Interchange a
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Wall to Protect Rec. ID Affected En
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
44.20 Avra Valley Rd Twin Peaks Rd
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Public Involvement/Project Coordina
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Conclusion October 2005 Interstate
Page 178 and 179:
Bibliography October 2005 CHAPTER 8
Page 180 and 181:
Bibliography October 2005 Tetra Tec
show all

I-10 Twin Peaks Traffic Interchange, Environmental Assessment

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?