The rating is however constrained by significant capital expenditure plans of JSWIL which is envisaged to be executed over the next 4-5 years and is expected to result in significant deterioration in the capital structure going forward as a result of additional debt to be availed for executing the same, said the agency. Furthermore, the company is also undertaking expansion at existing ports primarily to cater to increased steel requirements of JSW Steel Limited and two green-field projects, which are yet to be fully operational. The ratings are also constrained by moderate debt coverage metrics on account of expected increase in leverage, revenue concentration risk primarily due to high dependence on group companies for cargo throughput (mainly JSW Steel Limited) and uncertainty with respect to cargo handling by South West Ports Limited (SWPL).