COMMITMENTS AND CONTINGENCIES (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Environmental Loss Contingencies by Site

The number of environmental sites and related reserves for which remediation or long-term monitoring, preliminary site work or site assessment is being performed are as follows:



	As of March 31, 2018			As of December 31, 2017
	Number of Sites	Reserve (in millions)		Number of Sites	Reserve (in millions)
Eversource	58	$	63.8	59	$	54.9
CL&P	14	5.1		14	4.7
NSTAR Electric	15	2.8		15	2.7
PSNH	9	5.6		10	5.7

Schedule of Guarantor Obligations

The following table summarizes Eversource parent's exposure to guarantees and indemnifications of its subsidiaries to external parties, as of March 31, 2018:



Company	Description	Maximum Exposure (in millions)		Expiration Dates
On behalf of subsidiaries:
Eversource Gas Transmission LLC	Access Northeast Project Capital Contributions Guaranty ⁽¹⁾	$	185.0	2021
Various	Surety Bonds⁽²⁾	41.2		2018 - 2019
Eversource Service and Rocky River Realty Company	Lease Payments for Vehicles and Real Estate	7.3		2019 - 2024

⁽¹⁾

Eversource parent issued a declining balance guaranty on behalf of its subsidiary, Eversource Gas Transmission LLC, to guarantee the payment of the subsidiary's capital contributions for its investment in the Access Northeast project. The guaranty decreases as capital contributions are made. The guaranty will expire upon the earlier of the full performance of the guaranteed obligations or December 31, 2021.


⁽²⁾	Surety bond expiration dates reflect termination dates, the majority of which will be renewed or extended. Certain surety bonds contain credit ratings triggers that would require Eversource parent to post collateral in the event that the unsecured debt credit ratings of Eversource parent are downgraded.

Schedule of Complaints and Base ROE

A summary of the four separate complaints and the base ROEs pertinent to those complaints are as follows:



Complaint	15-Month Time Period of Complaint (Beginning as of Complaint Filing Date)	Original Base ROE Authorized by FERC at Time of Complaint Filing Date ⁽¹⁾	Base ROE Subsequently Authorized by FERC for First Complaint Period and also Effective from October 16, 2014 through April 14, 2017 ⁽¹⁾	Reserve (Pre-Tax and Excluding Interest) as of March 31, 2018 (in millions)		FERC ALJ Recommendation of Base ROE on Second, Third and Fourth Complaints
First	10/1/2011 - 12/31/2012	11.14%	10.57%	$—	⁽²⁾	N/A
Second	12/27/2012 - 3/26/2014	11.14%	N/A	39.1	⁽³⁾	9.59%
Third	7/31/2014 - 10/30/2015	11.14%	10.57%	—		10.90%
Fourth	4/29/2016 - 7/28/2017	10.57%	10.57%	—		10.57%

⁽¹⁾

The ROE billed during the period October 1, 2011 through October 15, 2014 consisted of a base ROE of 11.14 percent and incentives up to 13.1 percent. On October 16, 2014, the FERC set the base ROE at 10.57 percent and an incentive cap at 11.74 percent for the first complaint period. This was also effective for all prospective billings to customers beginning October 16, 2014. This FERC order was vacated on April 14, 2017.


⁽²⁾	CL&P, NSTAR Electric and PSNH have refunded all amounts associated with the first complaint period, totaling $38.9 million (pre-tax and excluding interest) at Eversource (consisting of $22.4 million at CL&P, $13.7 million at NSTAR Electric and $2.8 million at PSNH), reflecting both the base ROE and incentive cap prescribed by the FERC order.


⁽³⁾	The reserve represents the difference between the billed rates during the second complaint period and a 10.57 percent base ROE and 11.74 percent incentive cap. The reserve consisted of $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH as of March 31, 2018.