NH Conservation

M-183 115kV line

map

2023, March 30: start of construction form

2023, March 30: DES permit waiving specific requirements of Env-Wq 1503.21(c)(2) and Env-Wq 1504.09,

2023, March 29: Alteration of Terrain application

2023, March 29: Environmental Resources map

2023, March 29: transmittal of final documents. "Additionally, project construction is planned to begin as soon as possible upon permit approval. With that, I wanted to inquire about the start of construction waiver and how/when that should be submitted?'

2023, March 16: PAC minutes; no comment from PAC on project

2023, March 16: PAC presentation

2023, February 14: "Although the Committee reviewed the project and plans and determined the minimal impact on the Cocheco River corridor would occur, it was noted that the project appeared to be outside the jurisdiction of the committee"

2023, February 16: email E$, Fish & Game, DES

2023, February 7: crossing license with revision and original license. "The proposed project encompasses a structure replacement whereby Structure 88 at the public water and Structures 81 through 85 at the state-owned land crossing span are to be replaced with a weathering steel equivalent having the design and specification depicted and noted in the Structure Details of Exhibits 2 and 4 submitted by ES. Structure 87 will not be replaced as part of this crossing."

2023, February 6: petition for crossing; "Eversource will maintain and operate the clearances of the crossings at a height no less than what is required by the 2012 National Electrical Safety Code (NESC, Table 232-1) which is 15.5 feet for neutral or ADSS wires over state-owned lands

2023, February 3: staff recommendation; 15.5 feet for neutral or ADSS wires of Cocheco River and public land.

2023, January 9: revised exhibit for crossing of Cocheco River

2023, January 9: exhibits for crossing; 795 ASCR 31/1 Coot, (2) 7#8 Alumoweld, (1) 64 fiber ADSS

2010, October 15: staff recommendation; "That crossing has been licensed by the Commission (see Order No. 12,219 in Docket 76-22). PSNH also received a license from the Commission for the fiber optic cable it installed and maintains at the same crossing location (see Order No. 22,454 in Docket DE 96-370). PSNH states that it needs to uprate the M-183 line conductors to increase the power transfer capability of the line in order to meet the increased load growth in the seacoast are of New Hampshire."

2010, September 23: revised petition to cross the Cocheco River in Dover

2010, August 27: petition to cross Cocheco River in Dover; "uprate the M- 183 line conductors to increase the power transfer capability of the line. This need is a result of load growth in the seacoast area of New Hampshire. A portion of the M-183 line, from Madbury Substation to Structure 13 and from Structure 55 to Cocheco Street Substation, is 795 ACSR 36/1 conductor currently designed to operate at 212°F (100°C). This project will raise structures in certain locations to allow the 795 ACSR 36/1 conductor to operate at a full rating of 284°F (140°C) and maintain all required clearances."

2009, October 7: Order Nisi granting license; "The majority of the line is constructed with 795 kcmil ACSR conductors; however, a 3.2 mile section, including the Bellamy River Crossing, is constructed with smaller 477 kcmil ACSR conductors. According to PSNH, load growth in the seacoast area requires that this small section of line be upgraded to match the power capacity of the remainder of the line. PSNH said it also plans to upgrade the existing static wire conductors providing lightning protection at the crossing."

2009, September 30: staff recommendation; "The three phase conductors will be 795 kcmil ACSR with a 26/7 stranding"

2009, July 2: petition to cross the Bellamy River; "Between structures 13 and 55, the two existing 3#6 copperweld static wires will also be replaced with two new 7#8 alumoweld static wires."

1996,December 11: licensing of one ADSS