BP filed an answer in Federal Court…to the federal government's lawsuit seeking damages for the Deepwater Horizon oil spill, under the Clean Water and Oil Pollution Acts. BP wrote in response that the government's "request for a declaratory judgment regarding alleged damages under OPA constitutes improper claim splitting." BP admits the explosion of the Deepwater Horizon caused the oil spill…but says the amount of oil spilled from its Macondo well is still unknown...BP denies that it contributed to the spill through "corporate practices of disregarding federal regulations…reflecting the known failure, prior to the Deepwater Horizon spill, to properly design, install, maintain, repair, and operate equipment intended to prevent personal injury, loss of life, harm to the environment, and disasters like the Deepwater Horizon spill."