OPINION
This petition for review presents the question of whether the “discretionary function” exception to Alaska’s state claims act exempts the state from possible negligence liability in the state’s design of an airport taxiway.
In December 1975, a Japan Air Lines (JAL) Boeing 747 slid off a taxiway at Anchorage International Airport. The accident occurred as the aircraft was taxiing in preparation for takeoff. The portion of the taxiway where the accident took place was covered with “black ice,” formed by rain falling on frozen pavement.
As a result of the accident, the aircraft was severely damaged. JAL and its insurers, Tokio Marine & Fire Insurance Company, Ltd., and their co-insurers brought this action in the superior court against the *936 state, which owns and operates the airport, seeking to recover damages for cost of repair and loss of use of the aircraft. The parties have stipulated that the cost of repairing the aircraft was $19,743,029.61.
JAL’s complaint specified a number of instances of alleged negligence on the part of the state. The superior court granted partial summary judgment in favor of the state with respect to JAL’s allegation that the state was negligent “in maintaining and operating an east-west taxiway that is 25 feet less [in width] than the current [Federal Aviation Administration] standard, despite the fact that it contains substantial sloping inclines on either side, and is subject to hazardous icing and cross wind conditions.” In its decision the superior court held that “the conclusion that these decisions are immune from liability as valid exercises of the state’s discretionary function is inescapable. The location and size of the runways at ANC necessarily required consideration of the impact on surrounding airports, meteorological conditions, and available funds. Such considerations are indicia of the broad policy decisions meant to be immune from liability.” Following a motion for reconsideration, the court clarified its prior order, stating that it was intended to encompass not only the allegation that federal standards on the width of the taxiway were violated, but also JAL’s “allegations of negligent design generally, including failure to adhere to ICAO [International Civil Aviation Organization] standards, failure to provide 35-foot shoulders, and a 220 foot taxiway safety area.”
It is undisputed that the taxiway where the accident occurred was specifically designed by engineers employed by the state to accommodate wide-body jets such as the Boeing 747. The superior court’s ruling of partial summary judgment for the state was based on its conclusion that the design decisions in question were within the shield
of immunity provided by the discretionary function exception to state tort liability, AS 09.50.250. 1 We find that the design of the taxiway is not within the discretionary function exception, and therefore the state may be held liable for negligence in the design of the taxiway.
The purpose of the discretionary function exception is to preserve the separation of powers inherent to our form of government by recognizing that it is the function of the state, and not the courts or private citizens, to govern. Essentially, it seeks to ensure that private citizens do not interfere with or inhibit the governing process by challenging through private tort actions basic governmental policy decisions.
Adams v. State,
Of our previous cases interpreting the discretionary function exception,
State v. I’Anson,
Other jurisdictions have also held that design defects in highway construction are not immune from state liability under the discretionary function exception. A leading case so holding is
Breed v. Shaner,
The Washington Supreme Court has reached a similar conclusion as to state liability for highway design. In
Stewart v. State,
The decisions to build the freeway, to place it in this particular location so as to necessitate crossing the river, the number of lanes — these elements involve a basic governmental policy, program or objective. However, these are not the elements which are challenged by appellant. Rather, appellant argues that once those governmental decisions were made they had to be carried out without negligent design of the bridge or of the lighting system. Negligent design was not essential to the accomplishment of the policy, program or objective.
Id.
In
Andrus v. State,
In summary, the state may be held liable for injuries which result from negligent designs. The issue, as always, is whether the design decision in question involved a basic policy formulation which, under separation of powers concepts, should be immune to judicial review in a tort action, or whether the design decision at issue was merely part of the implementation or execution of a basic policy decision, and therefore not immune.
In the present case, the design decisions made in the taxiway plans by the state’s engineers were operational decisions which merely implemented the basic policy formulation decision to build a taxiway suitable for use by wide-body jets such as the Boeing 747. Once the basic policy decision to build such a taxiway at Anchorage International Airport was made, the state was obligated to use due care to make certain that the taxiway met the standard of reasonable safety for its users.
The superior court’s partial summary judgment order is REVERSED insofar as it is inconsistent with this opinion and the case is REMANDED for further proceedings.
Notes
. AS 09.50.250 provides in part:
A person or corporation having a ... tort claim against the state may bring an action against the state in the superior court... . However, no action may be brought under this section if the claim ... is an action for tort, and based upon the exercise or performance or the failure to exercise or perform a discretionary function or duty on the part of a state agency or an employee of the state, whether or not the discretion involved is abused ....
. We note that our case of
Jennings v. State,
In the present case, the state undertook the task of providing the traveling public with a taxiway designed for use by wide-body jets. In so doing it also assumed the responsibility of designing, constructing, and maintaining the taxiway safely. Once the state made the decision to build the taxiway, the discretionary function exception did not protect it from possible negligence liability in the operational carrying out of the basic policy-planning decision to build the taxiway.
See also Urethane Specialties, Inc. v. City of Valdez,
