Correspondence LAW /CRANDALL
A DIVISION OF LAW ENGINEERING
AND ENVIRONMENTAL SERVICES. INC.
April 4, 1997
Mr. Jim Funk
City of Tigard
13125 SW Hall Boulevard id Tigard, Oregon 97223
Subject: Site Drai I • _ • ' : n Adjustment
Ryder Truck Rental
14750 SW 72nd Street
Tigard, Oregon
w /Crandall Project No. 70144 - 6-0385
Dear Mr. Funk:
After a discussion with Mr. Phil Hickman, Project Manager for Hal's Construction, and Mr. Ron Schlenker,
Project Manager for Ryder Truck Company, and due to the existing site grading, we would like to eliminate
the 3 foot concrete swale at the above referenced site. The contractor agreed to maintain a slope of at least
1.5% away from the building and towards the catch basins. Since the owner wants to eliminate the concrete
swale and the contractor agreed to provide a smooth transition between the slopes leading to each catch
basin, Law /Crandall is satisfied with the elimination of the swale.
Concrete swales have the advantage of eliminating pavement distress by providing a more rigid area at the
bottom of the curves and channeling the water to the catch basins. However, the contractor proposes to
provide a smooth transition to the catch basins, and the owner favors the elimination of the concrete swale
due to past maintenance experience. Based on these points we request the City of Tigard's approval for
eliminating the concrete swale.
Please feel free to contact me if you have any questions regarding this matter.
Sincerely,
LAW /CRANDALL
//4e4"- /409''
A. Mazen Wahbeh Richard C. Leach
Project Manager Principal Engineer, Vice President
AWB/bt
(2 copies submitted)
cc: Ryder Truck Company
Mr. Ron Schlenker
Hal's Construction Inc.
Mr. Phil Hickman
200 CITADEL DRIVE • LOS ANGELES, CA 90040 -1554
(213) 889 -5300 • FAX (213) 721 -6700