This stack is in the process of being removed in favor of newer vent stacks just around the corner on the building. If other geocacher's want to log this benchmark before it is completely gone they should do so soon.
Will upload photos soon.
Previous articles in the series:
Geocaching by Bicycle: Introduction
Geocaching by Bicycle: April 3, 2016
Geocaching by Bicycle: April 5, 2016
Geocaching by Bicycle: May 12, 2016
Geocaching by Bicycle: May 16, 2016
Geocaching by Bicycle: May 17, 2016
Geocaching by Bicycle: May 18, 2016
Geocaching by Bicycle: May 19, 2016, Take Care, GC532QA
Geocaching by Bicycle: May 19, 2016, One Womans Junk Another Womans Treasure, GC3KHWH
Geocaching by Bicycle: May 19, 2016, Bob's der Stopp, GC335VZ
Geocaching by Bicycle: May 19, 2016, USGS Perry, GC2T05C
Geocaching: May 19, 2016, One Lone Tree, GC43VX8
Geocaching: May 19, 2016, Zooo Hooo Bass, GC2JN8N
Geocaching: May 19, 2016, Deer Runway, GC49CBP
Geocaching: May 21, 2016, Welcome to Riverside, GC3GR5A
Geocaching: May 22, 2016, Alongside Bruguier's Cabin, GC2HQFG
Geocaching: May 25, 2016, Perry Creek Pathway, GC1HEEE
Geocaching: May 26, 2016, The Grand Geo, GC5A04G
Geocaching: May 26, 2016, L&C Sergeant Floyd River Museum, GCE34B
Geocaching: May 26, 2016, Siouxland Veterans Bridge, GC4MWCJ
Geocaching: May 28, 2016, Other Side of the Bridge, GC4MZKC
Geocaching: May 28, 2016, Recess, GC6AMHZ
Geocaching: May 28, 2016, Fallen, GC6AMGR
Geocaching: May 28, 2016, Kitty Surprise, GC4V005
Geocaching: May 29, 2016, Sergeant Floyd Monument, GC27D3
Geocaching: May 30, 2016, Old Church TB Hotel, GC4FGA0
Geocaching: May 30, 2016, the red box, GC5AQ4V
Geocaching: June 1, 2016, V Is For Vixen And Visitors, GC37XND
Geocaching: June 1, 2016, Riverside Sports Light, GC3G4ZD
Geocaching: June 2, 2016, No Way Ly Seks, GC3T4ZK
Geocaching: June 2, 2016, dont wake the birds, GC53F2A
Geocaching: June 2, 2016, RR History, GC44F3Z
Geocaching: June 4, 2016, Bob's Path Stops Here, GC34DMX
Geocaching: June 4, 2016, Continental Bridge, GC1NYKV
Geocaching: June 4, 2016, Up Down Along The Trail, GC2J41X
Geocaching: June 4, 2016, Riverside Freeway, GC3TTG7
Geocaching: June 5, 2016, Bob's Boulevard, GC34DKH
Geocaching: June 5, 2016, Unhappy birds, GC3GJZA
Geocaching: June 5, 2016, Diamonds Again or Left / Right, GC49RFT
Geocaching: June 6, 2016, Via Riverside, GC2HWY4
Geocaching: June 6, 2016, Riverside Drive-In, GC3TTHD
Geocaching: June 8, 2016, Christy Bear, GC3T1BJ
Geocaching: June 9, 2016, Left Center, GC2J40E
Geocaching: June 10, 2016, RAGBRAI BENCH, GC5YKZY
Geocaching: June 11, 2016, "Old Highway 20" - Eberly Public Area, GCPNB9
Geocaching: June 12, 2016, Riverside Sports Trail, GC2HQH3
Geocaching: June 12, 2016, Riverside Sports, GC2HKJA
Geocaching: June 13, 2016, War Eagle Drive, GC4TNAK
Geocaching: June 14, 2016, Patriots Pride, GC5E45Q
Geocaching: June 16, 2016, Sioux City Sioux (Quartzite), GC1RY3W
Geocaching: June 16, 2016, Question, GC2G1V4
Geocaching: June 16, 2016, Goldie Beck, GC2GRAC
Geocaching: June 17, 2016, Memorial, GC2T04V
Geocaching: June 19, 2016, Near Riverside, GC3T4XW
Geocaching: June 19, 2016, Which Side, GC3BMED
Geocaching: June 20, 2016, Rose Hill, GC26PH8
Geocaching: June 20, 2016, U Is For Under The Tree And Unity, GC37XNF
Geocaching: June 20, 2016, 0 Day 12-12-12, GC41B7J
Geocaching: June 20, 2016, Zoom-Zoom-Zoom, GC1H8D7
Geocaching: June 20, 2016, Center Street Baseball At The Creek, GC1HEEP
Geocaching: June 20, 2016, Volunteers, GC2KJYV
Geocaching: June 22, 2016, Hobby, GC6JAZJ
Geocaching: June 22, 2016, Very Lonely, GC3EHC9
Geocaching: June 25, 2016, By Air Land and Sea, GC4R8CD
Geocaching: June 25, 2016, The Ammo Box In The Yard, GC1XHY6
Geocaching: June 29, 2016, Xpecting Balls And Strikes, GC2FQFH
Geocaching: June 30, 2016, Into The Heights, GC2JE57
Geocaching: June 30, 2016, Conventional Wisdom, GC1BX1Z
Geocaching: June 30, 2016, MAC-WAR EAGLE-Cache To Eagle # 1, GC4VX2K
Geocaching: July 3, 2016, Silence, GC6D3WM
Geocaching: July 3, 2016, Take Two Again, GC3KD3Y
Geocaching: July 4, 2016, Casino Maybe, GC49RF5
Geocaching: July 4, 2016, Lest We Forget, GC3AKVZ
Geocaching: July 5, 2016, CWEPTREE, GC3KHAN
Geocaching: July 5, 2016, High View, GC3B6GD
Geocaching: July 7, 2016, Headington Time Taking A Leap Every Four, GC6BTKH
Geocaching: July 7, 2016, The 15th Day..., GC44MFN
Geocaching: July 7, 2016, The 16th Day..., GC44MG7
Geocaching: July 7, 2016, The 17th Day..., GC44MGN
Geocaching: July 8, 2016, The 14th Day..., GC44MEQ
Geocaching: July 10, 2016, Covington Park, GC51A49
Geocaching: July 10, 2016, Great Lady, GC13471
Geocaching: July 10, 2016, TWIN LITES, GC1AT0A
Geocaching: July 10, 2016, South Park, GC2E4QM
Geocaching: July 11, 2016, 4 Day Of Christmas, GC41NZ7
Geocaching: July 12, 2016, Wood Post, GC1V44H
Geocaching: July 12, 2016, Western Edge of Town, GC60T03
Geocaching: July 12, 2016, Driving Stakes, GC3T8RH
Geocaching: July 12, 2016, Don't Drink the Water, GC5PFND
Geocaching: July 12, 2016, Veterans Memorial, GC1EZCQ
Geocaching: July 12, 2016, Yesteryear Depot, GC1BG3D
Geocaching: July 12, 2016, TERRITORIAL CHURCH, GC1B0Q1
Geocaching: July 12, 2016, DAHKOTAH DOG, GC1A9KP
Geocaching: July 12, 2016, Xit On Buckwalter, GC2KBKD
Geocaching: July 13, 2016, Elk Point Overlook, GC2B8X2
Geocaching: July 13, 2016, Turtle Lake, GC2B8WF
Geocaching: July 13, 2016, Kestrel's Vista, GC1Z2Z8
Geocaching: July 14, 2016,The 18th Day..., GC45C2H
Geocaching: July 14, 2016, 2 Day Of Christmas, GC41NYH
Geocaching: July 14, 2016, 3 Day Of Christmas, GC41NZ4
Geocaching: July 15, 2016, Fence Or Rail, GC39DKX
Geocaching: July 15, 2016, Rail Or Fence, GC39DKP
Geocaching: July 16, 2016, 10 Day Of Christmas, GC42GDJ
Geocaching: July 16, 2016, Big Sioux Habitat, GC5ANRD
Geocaching: July 17, 2016, Clinkers, GC20G4B
Geocaching: July 17, 2016, Parkview, GC2JE5C
Geocaching: July 18, 2016, MAC-WAR EAGLE-Cache To Eagle #7, GC66HQ8
Geocaching: July 22, 2016, Rockin' 35, GC52FAD
Geocaching: July 22, 2016, Sir Lancelot, GC52F9G
Geocaching: July 22, 2016, Indian Hills, GC3CY67
Geocaching: July 22, 2016, Outer Limits, GC49CC3
Geocaching: July 22, 2016, You Got Benched, GC49CC7
Geocaching: July 22, 2016, Drive Safely, GC5XJ2Y
Geocaching: July 22, 2016, Yes it Is Winter Friendly, GC2KBKM
Geocaching: July 24, 2016, Lucia's Loess, GC1Z2Z6
Geocaching: July 25, 2016, Riverfront, GC28Z4A
Geocaching: July 28, 2016, Big Sioux Trail, GC6P76C
Geocaching: July 28, 2016, 12 Day Of Christmas, GC42GCE
Geocaching: July 28, 2016, Big Sioux Trail Continued, GC6P76M
Geocaching: July 29, 2016, Benchmark NM0177
Geocaching: July 29, 2016, Benchmark NM1683
Geocaching: July 29, 2016, Benchmark NM0176
Geocaching: July 10, 2016, Great Lady, GC13471
Geocaching: July 10, 2016, TWIN LITES, GC1AT0A
Geocaching: July 10, 2016, South Park, GC2E4QM
Geocaching: July 11, 2016, 4 Day Of Christmas, GC41NZ7
Geocaching: July 12, 2016, Wood Post, GC1V44H
Geocaching: July 12, 2016, Western Edge of Town, GC60T03
Geocaching: July 12, 2016, Driving Stakes, GC3T8RH
Geocaching: July 12, 2016, Don't Drink the Water, GC5PFND
Geocaching: July 12, 2016, Veterans Memorial, GC1EZCQ
Geocaching: July 12, 2016, Yesteryear Depot, GC1BG3D
Geocaching: July 12, 2016, TERRITORIAL CHURCH, GC1B0Q1
Geocaching: July 12, 2016, DAHKOTAH DOG, GC1A9KP
Geocaching: July 12, 2016, Xit On Buckwalter, GC2KBKD
Geocaching: July 13, 2016, Elk Point Overlook, GC2B8X2
Geocaching: July 13, 2016, Turtle Lake, GC2B8WF
Geocaching: July 13, 2016, Kestrel's Vista, GC1Z2Z8
Geocaching: July 14, 2016,The 18th Day..., GC45C2H
Geocaching: July 14, 2016, 2 Day Of Christmas, GC41NYH
Geocaching: July 14, 2016, 3 Day Of Christmas, GC41NZ4
Geocaching: July 15, 2016, Fence Or Rail, GC39DKX
Geocaching: July 15, 2016, Rail Or Fence, GC39DKP
Geocaching: July 16, 2016, 10 Day Of Christmas, GC42GDJ
Geocaching: July 16, 2016, Big Sioux Habitat, GC5ANRD
Geocaching: July 17, 2016, Clinkers, GC20G4B
Geocaching: July 17, 2016, Parkview, GC2JE5C
Geocaching: July 18, 2016, MAC-WAR EAGLE-Cache To Eagle #7, GC66HQ8
Geocaching: July 22, 2016, Rockin' 35, GC52FAD
Geocaching: July 22, 2016, Sir Lancelot, GC52F9G
Geocaching: July 22, 2016, Indian Hills, GC3CY67
Geocaching: July 22, 2016, Outer Limits, GC49CC3
Geocaching: July 22, 2016, You Got Benched, GC49CC7
Geocaching: July 22, 2016, Drive Safely, GC5XJ2Y
Geocaching: July 22, 2016, Yes it Is Winter Friendly, GC2KBKM
Geocaching: July 24, 2016, Lucia's Loess, GC1Z2Z6
Geocaching: July 25, 2016, Riverfront, GC28Z4A
Geocaching: July 28, 2016, Big Sioux Trail, GC6P76C
Geocaching: July 28, 2016, 12 Day Of Christmas, GC42GCE
Geocaching: July 28, 2016, Big Sioux Trail Continued, GC6P76M
Geocaching: July 29, 2016, Benchmark NM0177
Geocaching: July 29, 2016, Benchmark NM1683
Geocaching: July 29, 2016, Benchmark NM0176
