Extension approved to green belt quarry Hertfordshire County Council has approved a proposal to extract 3.5 million tonnes of sand and gravel over 10 years at Hatfield quarry. by Ruth Amundson Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Email: mineralplanning@haymarket.com Call: 0208 267 8120 RegisterFREE Limited free articles a month Free email bulletins Register Subscribe Prices on request Full access to mineralandwasteplanning.co.uk Exclusive event discounts Mineralandwasteplanning print magazine Plus lots more including our State of the Industry Report. See all benefits