When are へ and に used together?


> おばあさん は 川（かわ） へ せんたく に でかけます。

Why is there both へ and に? When can they be used together? Can someone break
down the sentence for me to understand?




The に you presented indicates purpose of going rather than a direction.

Related: [Is it true that only movement verbs can take [V-stem]に to express a
purpose?](https://japanese.stackexchange.com/q/2957/542)

Constituent parts:

  * おばあさんは(The woman(topic)) 

  * 川へ(in the direction of river) 

  * せんたくしに(for the purpose of laundry) 

  * でかけます(go out)

Sentence: The woman goes out to the river to do laundry.

