Sent bitcoin from coinbase to another wallet has been pending for hours

[Watterboy]

Sent bitcoin from coinbase to another wallet and it has been pending for hours please help.  receiving address is : 12A9u8QH7ALAe64J4u5T7LEKVStV6DV6p9 

[Potato Chips]

There is currently no transactions found in this address: https://blockchain.info/address/12A9u8QH7ALAe64J4u5T7LEKVStV6DV6p9

So I'm assuming that they still haven't initiated your withdrawal yet. As the usual answer, No one in here can help you. You should contact their support regarding this.
But since their support is currently under heavy load. I'm guessing your problem is already solved before they can even reply.

I'll leave the links here:

Submit a request here: https://support.coinbase.com/customer/portal/emails/new
Facebook: https://www.facebook.com/Coinbase
Twitter: https://twitter.com/coinbase

*Read and follow the yellow text box

[chris200x9]

As per this transaction ID your transaction already confirmed - https://blockchain.info/address/12A9u8QH7ALAe64J4u5T7LEKVStV6DV6p9

5 confirmations when I'm writing this post.

Since bitcoin blockchain is crowded so you need to wait for some time to see your transaction confirmation.