Dharwad

1.4 L without scholarship.

It is very good for you. Many people wants to get this seats in IITS NITS. You are very lucky to have this seat. It is very good option, and don't go for other options. Work hard here and get placed.

For document verification after seat allocation you have to visit the nearest reporting center. It is not the case, you have to visit the institute in which the seat is allotted. You can visit any of the following reporting centers as per your convenience. List of reporting centers is available at:
https://josaa.nic.in/webinfocms/Handler/FileHandler.ashx?i=File?=111&iii=Y

Till now I think IIIT DHARWAD is best as it's construction started for own campus and Sudha Murty is also present in Board of Governors. Pune comes after that, then Sri City, Nagpur,Kottayam and at last Kurnool.

You can check the NIRF - MHRD 2018 ranking of engineering colleges of india at
https://www.nirfindia.org/2018/EngineeringRanking.html
BEST OF LUCK!

For mining branch, the on-campus placements are very low, it's less than 30% and even low for the batches I saw. None of my friends from Mining department got placed in the campus and many of them have pointer 8.5+. Later, they got jobs through off-campus placements, that's a different story.

Well, if we consider all the colleges in Karnataka, then NITK will be the de-facto #1. Other noteworthy mentions would include IIIT, Bangalore and MIT (Manipal, not Massachusetts.). If Masters/Doctoral courses are included as well, then, there is the one and only, IISc Bangalore.

KCET 2018 College Predictor
Use your KCET 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack. The result is based on admissions data of KCET 2017. Get resources, insights on colleges & courses:
https://www.shiksha.com/b-tech/resources/kcet-college-predictor.