The main issue with the parking space is slope. ADAAG 4.6.3 (http://www.access-board.gov/adaag/html/adaag.htm#4.6) states, "Parking spaces and access aisles shall be level with surface slopes not exceeding 1:50 (2%) in all directions." The picture of the drain within the space was intended to be an indicator that slope could be an issue: typically, a parking lot will severely slope the lot to drain water more quickly. While a drain in the accessible parking space or access aisle is not prohibited, it would probably not be encouraged.

Slopes within parking spaces are necessary to assist with the clearing of water and the prevention of puddling that can freeze and create even more access and safety issues. However, in the photo, the severity of the slope is the problem (probably the most common problem with accessible parking spaces). A slope that is too severe can cause balance problems for persons with mobility difficulties, transferring problems from a vehicle into a wheelchair, and possibly cause persons using a lift or ramp to tip over.

As the photo indicated, the slope near the drain was 3.8%, which is nearly double the maximum slope allowed. Because this building and contiguous parking lot was constructed since the ADA and associated laws have been in effect, this parking lot needs to be leveled in order to comply with ADAAG 4.6. If it were constructed prior to the institution of these laws, these spaces could possibly be relocated to a level or more level area, but would still need to be located on the shortest route possible to the entrances. (See ADAAG 4.6.2 (http://www.access-board.gov/adaag/html/adaag.htm#4.6) for additional information.)

the parking lots accessiblity problem: the slope near the drain is nearly double the maximum slope allowed

Photo of a Smart Tool which indicates the slope of the parking lot