Complex sentence: The E4 test stand was proposed in the year 2000 near the H1 test stand--however there are no substantial utilities on the site and the gravel access road to the test stand would require improvements.
Split into simpler sentences: The E4 test stand was proposed in the year 2000. The location for the E4 test stand was proposed for near the H1 Test Stand was evaluated but there are no substantial utilities on the site and the gravel access road to the test stand would require improvements.