Public Notice: §401 Clean Water Act (CWA) Water Quality Certification for the Navajo Gallup Water Supply Project Reach 27.7B, McKinley County, New Mexico
The U.S. Bureau of Reclamation (USBR) is requesting §401 CWA Water Quality Certification from the Environmental Protection Agency. The §401 CWA Water Quality Certification will authorize construction of a municipal and industrial water supply from the San Juan River to the eastern section of the Navajo Nation, the Southwestern portion of the Jicarilla Apache Nation, and the City of Gallup, New Mexico. The project includes installing approximately 6,650 linear feet of 16” Cl. 350 ductile iron waterline, 15,000 linear feet of 16” Cl. 250 DR-18 PVC waterline, and a meter station.
Reach 27.7B is located northeast of Gallup, New Mexico. The 16” waterline begins at the end of NGWSP Reach 27.6 close to the intersection of Hasler Valley Road and County Road 43. The waterline then runs northwest along Hasler Valley Road and the Transwestern Gas line to the west end of Red Rock Park. The meter station is located south of the Kinder-Morgan gas lines off Hasler Valley Road.
Written Comments must be received on or before October 29, 2021.
Waters of the U.S. were identified at two locations within the alignment of Reach 27.7B. Construction activities proposed within the ordinary high water mark (OHWM) of both crossings include; clearing and grubbing of small bushes, rocks, and other objects natural to the landscape, excavating a trench, and installing 16-inch ductile iron and PVC water pipeline. Construction activities proposed within the OHWM of Crossing 27.7B-3 include installing a gabion grade control structure for bank stabilization and scour reduction. All disturbed areas would be backfilled and re-contoured to their original grade upon completion of construction activities so that there is no reduction, obstruction, or detrimental effects to channel flow.
Avoidance and minimization measures to mitigate temporary and minor impacts specific to Crossing 27.7B include the following:
- Best Management Practices (BMPs) will be implemented to prevent adverse water quality impacts in accordance with the State of New Mexico’s CWA Section 401 water quality certification conditions for USACE’s 2021 Nationwide Permits under CWA Section 404.
- Temporary and permanent soil erosion control measures will be implemented in accordance with the National Pollutant Discharge Elimination System (NPDES) permit process of the CWA, and a Storm Water Pollution Prevention Plan (SWPPP) will be prepared. Temporary measures to control erosion and sediment could include protecting stockpiled materials to prevent erosion of the materials into Waters of the U.S. by installing silt screens, straw bales, or other erosion control measures, and stabilizing disturbed areas by re-seeding them with a mixture of local source, native riparian grasses, and shrubs.
Additional information and project documents are available from the U.S. Bureau of Reclamation’s website.