NM 532 Curve Correction Project - New Mexico Department of ...
NM 532 Curve Correction Project - New Mexico Department of ... NM 532 Curve Correction Project - New Mexico Department of ...
NM 532 Curve Correction Project Environmental Assessment 1.0 SUMMARY The New Mexico Department of Transportation (NMDOT), in cooperation with the Federal Highway Administration (FHWA), proposes to reconstruct three curves of the NM 532 roadway in Lincoln County, New Mexico (see Figure 1.1). NM 532 is a rural arterial roadway that extends from NM 48 in Alto to Ski Apache, and it provides the only roadway access to Ski Apache and nearby areas on the Lincoln National Forest. The project area is located within NMDOT District 2. The NM 532 Curve Correction Project is listed in the Fiscal Year (FY) 2012-2015 Statewide Transportation Improvement Program (STIP) Amendment 4 as control number (CN) 2101140. The NM 532 Curve Correction Project EA was developed in accordance with the National Environmental Policy Act (NEPA), NMDOT Location Study Procedures (NMDOT, 2000) and Federal Highway Administration (FHWA) Technical Advisory T 6640.8A, 23 Code of Federal Regulations (CFR) Parts 771 and 772, and other applicable guidelines and regulations. The purpose of the NM 532 Curve Correction Project is to improve traffic and safety conditions between MP 0.0 and MP 12.0 while considering the needs of local residents, forest visitors, and the Mescalero Apache Tribe. The project need is based on the following conditions: insufficient shoulder width; roadway geometry does not meet current standards resulting in several sharp curves; post-fire soil erosion undercuts the roadway, steep drop-offs next to driving lanes; limited signage to inform drivers of roadway conditions; lack of pull-off areas; poor pedestrian access at scenic areas; extensive maintenance needs; and economic viability of recreation-related businesses. The following three curves are proposed for extensive reconstruction: Texas Turn at MP 6.89-7.05, Axle Bend Curve at MP 8.21-8.37, and Last Curve at MP 11.86-11.95 (see Figure 1.2). These curves have been identified as priority for improvements. Work would entail increasing the curve radii and correcting the curve grades. At each curve, a retained soil system (RSS) wall would be constructed using additional native fill. The RSS would consist of a geo-grid embankment constructed at a 0.5:1 slope with rock-filled baskets for the wall face. Perforated drainpipes and subsurface drain outlets would be installed as part of the RSS wall. Guardrail would be installed at the top of the embankment. Energy dissipaters or other similar slope protection measures would be installed in areas where drainage has caused severe erosion. On the upslope side of Axle Bend Curve, some rock would be excavated and removed. No blasting would occur. Rock or slope protection would be used to create a stabilized rock-cut face only if unstable rock is encountered. The current proposed typical section would consist of two 11-foot travel lanes, two 3-foot shoulders, and two 2.5 foot tapers. Existing vehicle pull-off areas at each curve would be paved. In some areas, slopes would be excavated and additional fill would be placed. Walls, guardrails, and signs would be installed in some sections. The total estimated project cost for the Recommended Build Alternative is $1.8 million. Construction of the project would begin in 2013. This EA concludes that the Recommended Build Alternative meets the purpose and need of the proposed project and is not expected to have significant adverse social, economic, or environmental impacts that will warrant an Environmental Impact Statement. Unless significant impacts are identified as a result of public review, a Finding of No Significant Impact (FONSI) will be requested from FHWA. If a FONSI is issued, it will provide approval for final design and construction of NM 532 at Texas Turn at MP 6.89- 7.05, Axle Bend Curve at MP 8.21-8.37, and Last Curve at MP 11.86-11.95. March 2013 1 CN 2101140
11 EOP (Mile Post 12.0) San Juan Rio Arriba Taos Los Alamos Mora Harding McKinley Sandoval San Miguel Santa Fe Cibola Guadalupe Quay Valencia Torrance Curry De Baca Catron Socorro Roosevelt Lincoln Sierra Grant Otero Doña Ana Luna Hidalgo Colfax Union Chaves Eddy Last Curve MP 11.86-11.95 Project Area Lea 11 Nogal Peak, NM (1982) USGS 7.5' Quadrangle 10 Legend 8 Project Area 6 7 Axle Bend Curve MP 8.21-8.37 Texas Turn MP 6.89-7.05 4 532 ¬«NM USGS 7.5' Quadrangle Angus, NM (1982) 2 3 ± T10S, R13E; Lincoln National Forest Unplatted Lands Lincoln County, New Mexico 1:47,000 0 0.5 1 1.5 Kilometers BOP (Mile Post 0.0) Marron and Associates, Inc. 9 8 NM 532 Proposed Upgrades Figure 1.1 Project Area Map 10
- Page 1 and 2: Notice of Environmental Assessment
- Page 4 and 5: TABLE OF CONTENTS 1.0 SUMMARY .....
- Page 8 and 9: Texas Turn MP 6.89-7.05 Last Curve
- Page 10 and 11: San Juan Rio Arriba Taos Colfax Uni
- Page 12 and 13: NM 532 Curve Correction Project Env
- Page 14 and 15: NM 532 Curve Correction Project Env
- Page 16 and 17: NM 532 Curve Correction Project Env
- Page 18 and 19: NM 532 Curve Correction Project Env
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- Page 22 and 23: NM 532 Curve Correction Project Env
- Page 24 and 25: NM 532 Curve Correction Project Env
- Page 26 and 27: VICINITY MAP LEGEND INTENT SCALES V
- Page 28 and 29: ℄ NM-532 PROPOSED RSS WALL LEFT S
- Page 30 and 31: TYPICAL GEOGRID COVERAGE TYPICAL RS
- Page 32 and 33: FACING UNIT REINFORCED SOIL SLOPE D
- Page 34 and 35: NM 532 VICINITY MAP NTS Δ LEGEND E
- Page 36 and 37: NM 532 VICINITY MAP NTS Δ LAST CUR
- Page 38 and 39: From: To: Subject: Date: Wallace, L
- Page 40 and 41: NEW MEXICO ENVIRONMENT DEPARTMENT O
- Page 42: parties involved in the project to
- Page 46 and 47: Bibliography Banks, P.E. undated. B
11<br />
EOP<br />
(Mile Post 12.0)<br />
San Juan Rio Arriba Taos<br />
Los Alamos Mora<br />
Harding<br />
McKinley Sandoval<br />
San Miguel<br />
Santa Fe<br />
Cibola<br />
Guadalupe Quay<br />
Valencia Torrance<br />
Curry<br />
De Baca<br />
Catron Socorro<br />
Roosevelt<br />
Lincoln<br />
Sierra<br />
Grant<br />
Otero<br />
Doña Ana<br />
Luna<br />
Hidalgo<br />
Colfax<br />
Union<br />
Chaves<br />
Eddy<br />
Last <strong>Curve</strong><br />
MP 11.86-11.95<br />
<strong>Project</strong> Area<br />
Lea<br />
11<br />
Nogal Peak, <strong>NM</strong> (1982)<br />
USGS 7.5' Quadrangle<br />
10<br />
Legend<br />
8<br />
<strong>Project</strong> Area<br />
6<br />
7<br />
Axle Bend <strong>Curve</strong><br />
MP 8.21-8.37<br />
Texas Turn<br />
MP 6.89-7.05<br />
4<br />
<strong>532</strong><br />
¬«<strong>NM</strong><br />
USGS 7.5' Quadrangle<br />
Angus, <strong>NM</strong> (1982)<br />
2<br />
3<br />
±<br />
T10S, R13E;<br />
Lincoln National Forest<br />
Unplatted Lands<br />
Lincoln County, <strong>New</strong> <strong>Mexico</strong><br />
1:47,000<br />
0 0.5 1 1.5<br />
Kilometers<br />
BOP<br />
(Mile Post 0.0)<br />
Marron<br />
and Associates, Inc.<br />
9<br />
8<br />
<strong>NM</strong> <strong>532</strong><br />
Proposed Upgrades<br />
Figure 1.1<br />
<strong>Project</strong> Area Map<br />
10
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