Drift Creek
This watershed was processed with a 30-meter DEM.  10-meters DEMs may
exist, but are not easily available.

196700 30-meter cells: 177.03 square km.

and here are the elevations.
A VALUE of 0 is 0-100 meters.  COUNT is the number of 30-meter cells.
       VALUE      COUNT
           0      13990
         100      35295
         200      50582
         300      41294
         400      28757
         500      18325
         600       5493
         700       1870
         800       1094

and here is the 20-meter version:
       VALUE      COUNT
           0       2068
          20       2023
          40       2690
          60       3383
          80       3826
         100       4641
         120       5668
         140       7550
         160       7934
         180       9502
         200       9914
         220      10506
         240      10201
         260       9929
         280      10032
         300       9331
         320       8685
         340       8282
         360       7863
         380       7133
         400       6723
         420       6297
         440       5885
         460       5312
         480       4540
         500       4908
         520       4219
         540       3656
         560       3134
         580       2408
         600       1772
         620       1375
         640       1083
         660        751
         680        512
         700        396
         720        326
         740        427
         760        423
         780        298
         800        400
         820        558
         840        136