We've Moved!
![We've Moved 600 NW 124th St, OKC OK 73114](/sites/default/files/styles/cropped_16_9/public/2023-07/WE%27VE%20MOVED%20half%20page%20Website%20Blog_0.png?itok=IjIy035G)
![](/sites/default/files/styles/cropped_16_9/public/2023-07/IMG_1088.jpg?itok=3Uu7Fmhb)
Visit us at our new location!
HDCL Holiday Schedule
![HDCL Holiday Schedule HDCL Holiday Schedule](/sites/default/files/styles/cropped_16_9/public/2022-11/tnc_11065968_1.jpg?itok=5zFcUzeI)
HDCL will be CLOSED the following days:
Thanksgiving Day – Thursday, November 23, 2023
Black Friday – Friday, November 24, 2023
Christmas Day (Observed) – Monday, December 25, 2023
Boxing Day – Tuesday, December 26, 2023
New Year's Day (Observed) – Monday, January 1, 2024
15th Street is open again!
![The construction at the Railroad crossing is finished Railroad crossing construction complete](/sites/default/files/styles/cropped_16_9/public/2021-08/15th%20open.png?itok=1sGVqm5P)
We are pleased to announce that the construction is finished at the railroad crossing on 15th Street!
You can once again get to our Calibration Lab from Broadway Extension without detouring to 2nd Street or 33rd Street.
Please contact us if you have any questions. Click below for a link to google maps.
15th Street is Temporarily Closed at the Railroad Tracks
![15th Street Construction](/sites/default/files/styles/cropped_16_9/public/2021-08/15th%20re-route.png?itok=M9odM5Ts)
15th Street is temporarily closed at the Railroad tracks. The easiest re-routes are either 33rd Street to Kelly and around, or 2nd Street to Kelly and around.
We can also email you a larger version of this map if you would like, just let us know!
Please call us if you have any questions 405-285-5850.
HDCL will be CLOSED Wednesday, February 17, 2021 due to Winter Storm
![HDCL will be CLOSED Wednesday, February 17, 2021 due to Winter Storm CLOSED Wednesday, February 17, 2021 due to Winter Storm](/sites/default/files/styles/cropped_16_9/public/2021-02/191126165300-top-5-thanksgiving-storms-4-super-169.jpg?itok=coIU7_po)
HDCL will be CLOSED Wednesday, February 17, 2021 due to Winter Storm