The generator matrix

 1  0  0  1  1  1  1  1  1  6  1  1  1  0  1  1  6  1  1  3  1  1  1  6  3  1  6  1  1  3  1  1  1  1  1  1  0  6  1  1  1  1  1  3  1  1  1  1  1  0  1  6  0  1  1  1  1  1  1  0  3  3  3  3  6  6  1  1  6  1
 0  1  0  6  1  7  8  0  2  1  6  7  5  1  1  3  0  4  6  1  1  2  3  1  6  7  1  8  5  1  2  8  4  7  5  1  1  1  8  2  0  6  0  3  6  4  3  4  5  1  3  1  1  7  5  0  6  1  3  1  1  1  1  1  1  1  2  8  1  0
 0  0  1  7  1  6  2  8  6  7  4  2  1  5  4  3  1  0  5  3  8  3  7  2  1  8  0  1  3  2  5  7  4  0  6  5  3  5  8  8  2  0  4  1  3  1  5  3  7  4  2  4  7  5  0  3  8  2  0  8  8  1  7  6  1  6  0  3  3  5

generates a code of length 70 over Z9 who´s minimum homogenous weight is 137.

Homogenous weight enumerator: w(x)=1x^0+222x^137+166x^138+138x^140+36x^141+90x^143+4x^144+12x^146+16x^147+12x^149+4x^153+16x^156+12x^158

The gray image is a code over GF(3) with n=210, k=6 and d=137.
This code was found by Heurico 1.16 in 0.34 seconds.