Rayburn Country Electric Cooperative (RCEC) on Jan. 5 filed with the Public Utility Commission of Texas an application to amend its certificate of convenience and necessity for the Lower Bois D’Arc Water Treatment Plant 138-kV Transmission Line Project in Fannin and Hunt counties in Texas.
The project is needed to supply wholesale power to a delivery point at the new Lower Bois d’Arc Creek Reservoir (LBCR) Treatment Plant substation to be built by Fannin County Electric Cooperative (FCEC), which would be used to serve the North Texas Municipal Water District’s (NTMWD) water treatment plant and related facilities associated with NTMWD’s proposed Lower Bois d’Arc Creek Reservoir, RCEC said.
The new line would connect a planned substation to be built and owned by FCEC, located on NTMWD-owned property southeast of the intersection of County Road (CR) 4965 and U.S. Highway 69, about 1.14 miles from the Leonard city limits near the proposed LBCR water treatment plant and related facilities – anticipated to be called the LBCR Treatment Plant substation – to a proposed switch/meter station located along Oncor’s existing Bonham SWT-Wolfe City 2 SWT 138-kV transmission line on the south side of Farm-to-Market (FM) Road 68 about 0.11 miles east and 0.02 miles south of the intersection of FM 68 and CR 3710 – anticipated to be called the LBCR Treatment Plant Switch.
RCEC added that the point of delivery at the LBCR Treatment Plant substation is located within the singly certificated service area of FCEC.
RCEC would install new transmission switching equipment at the LBCR Treatment Plant Switch, RCEC said, noting that the LBCR Treatment Plant Switch site would be about 4.5 acres in size. The proposed site was identified because, for instance, it connects to Oncor’s existing 138-kV line, which is the closest transmission line capable of providing the needed interconnection.
RCEC also said that FCEC selected the location for the LBCR Treatment Plant substation based primarily on the need to, for instance, locate adjacent to the concentrated load center to be served by the project.
The entire project would be about 12 miles to 18 miles long, depending on the final route selected, RCEC said.
RCEC said that it would own, operate, and maintain all transmission line facilities associated with the project. RCEC also noted that it has acquired the LBCR Treatment Plant Switch property, and would own, operate, and maintain all facilities associated with the LBCR Treatment Plant Switch where the new 138-kV transmission line would connect to Oncor’s existing 138-kV transmission line.
The typical height of pole structures would be about 70 feet to 95 feet above ground level, but the final, actual above-ground height may vary depending on terrain, structure location, and span length, and may range in height from 65 feet to a maximum of 150 feet above ground level, RCEC said.
The standard single-pole transmission structures proposed for the project are steel or concrete poles with steel davit arms supporting the conductors, RCEC said.
While none of the right of way (ROW) has been acquired, RCEC has acquired the property where the LBCR Treatment Plant Switch would be located, RCEC said, adding that some portions of alternative routes would be located on NTMWD-owned property, as would the LBCR Treatment Plant substation. NTMWD intends to grant easements at no cost to RCEC for the portion of any alternative route selected by the commission that is located on NTMWD-owned property.
Land uses within the study area are predominantly agricultural, RCEC added, noting that the study area contains limited urban development with isolated and rural residences scattered throughout.
RCEC noted that it retained Atkins to prepare an environmental assessment. RCEC also said that after evaluating 15 alternative routes, it selected “Route L” as the route that best complies with certain rules, and, among other things:
- Has the shortest route – 12.65 miles
- Is the cheapest route – estimated to cost about $8.8m
- Has the fourth fewest habitable structures within 300 feet of the ROW centerline – 17
- Has the greatest length of ROW paralleling NTMWD’s proposed water pipeline – 7.36 miles
- Has the least number of additional parks/recreation areas within 1,000 feet of the ROW centerline – zero
- Has the fourth shortest length of ROW crossing areas of high archaeological/historical site potential – six miles
Among other things, RCEC said that according to the estimated schedule, ROW and land acquisition would begin in December and be completed in April 2019; engineering and design would begin in December and be completed in February 2019; material and equipment procurement would begin in February 2019, and be completed in May 2019; construction of the facilities would begin in May 2019, and be completed in February 2020, which is also when the facilities would be energized.