 In 1957, NSB's costs of operating the line was NOK 750,000 per year, while income was NOK 90,000.In a letter dated 28 May, NSB proposed closing the line from 1 October 1958, and received support from the Ministry of Transport and Communications.However, Grimstad would need new and better roads should it lose the railway line, particularly the road from Grimstad to Blakstad.