[3] Name on the Register [4] Image Date listed [5] Location City or town Description 1 Allen House Allen House July 10, 1975 (# 75000686 ) 515 1st Ave., W. 42°29′03″N 91°07′50″W / 42.484167°N 91.130556°W / 42.484167; -91.130556 (Allen House ) Dyersville 2 Andrew-Ryan House Andrew-Ryan House April 11, 1985 (# 85000720 ) 1375 Locust 42°30′17″N 90°40′16″W / 42.504722°N 90.671111°W / 42.504722; -90.671111 (Andrew-Ryan House ) Dubuque 3 Basilica of St. Francis Xavier, Church and Rectory Basilica of St. Francis Xavier, Church and Rectory September 29, 1999 (# 99001205 ) 114 Second Street, S.W. 42°29′04″N 91°07′33″W / 42.484436°N 91.125803°W / 42.484436; -91.125803 (Basilica of St. Francis Xavier, Church and Rectory ) Dyersville 4 John Bell Block John Bell Block December 20, 2002 (# 02001540 ) 1301-07 Central Ave. 42°30′21″N 90°39′59″W / 42.505833°N 90.666389°W / 42.505833; -90.666389 (John Bell Block ) Dubuque 5 Bishop's Block Bishop's Block May 19, 1994 (# 94000477 ) 90 W. Main St. 42°29′40″N 90°39′49″W / 42.494444°N 90.663611°W / 42.494444; -90.663611 (Bishop's Block ) Dubuque 6 Carnegie-Stout Public Library Carnegie-Stout Public Library August 1, 1975 (# 75000684 ) 11th and Bluff Sts. 42°30′09″N 90°40′12″W / 42.5025°N 90.67°W / 42.5025; -90.67 (Carnegie-Stout Public Library ) Dubuque 7 Cathedral Historic District Cathedral Historic District September 25, 1985 (# 85002501 ) Roughly bounded by a bluffline running west of Bluff St., W. 7th, Locust, and Jones Sts. 42°29′48″N 90°40′03″W / 42.496667°N 90.6675°W / 42.496667; -90.6675 (Cathedral Historic District ) Dubuque It includes 96 contributing buildings, including St. Raphael's Cathedral and United States Post Office and Courthouse (Dubuque, Iowa, 1934) . [4] 8 Concord Congregational Cemetery Concord Congregational Cemetery October 27, 2017 (# 100001215 ) 21755 N. U.S. Route 52 42°35′09″N 90°54′45″W / 42.585941°N 90.912484°W / 42.585941; -90.912484 (Concord Congregational Cemetery ) Durango vicinity 9 Cottage Hill Methodist-Episcopal Cemetery Cottage Hill Methodist-Episcopal Cemetery June 19, 2017 (# 100001216 ) 22001 N. U.S. Route 52 42°35′02″N 90°55′04″W / 42.583869°N 90.917730°W / 42.583869; -90.917730 (Cottage Hill Methodist-Episcopal Cemetery ) Durango 10 Diamond Jo Boat Store and Office Diamond Jo Boat Store and Office November 23, 1977 (# 77000512 ) Jones and Water Sts. 42°29′35″N 90°39′32″W / 42.49304444°N 90.659025°W / 42.49304444; -90.659025 (Diamond Jo Boat Store and Office ) Dubuque 11 Dubuque Casket Company Dubuque Casket Company February 9, 2006 (# 06000003 ) 1798 Washington St. 42°30′37″N 90°39′58″W / 42.510249°N 90.666211°W / 42.510249; -90.666211 (Dubuque Casket Company ) Dubuque 12 Dubuque City Hall Dubuque City Hall September 14, 1972 (# 72000472 ) 50 W. 13th St. 42°30′19″N 90°40′03″W / 42.505278°N 90.6675°W / 42.505278; -90.6675 (Dubuque City Hall ) Dubuque 13 Dubuque County Courthouse Dubuque County Courthouse June 23, 1971 (# 71000298 ) 720 Central Ave. 42°30′04″N 90°39′52″W / 42.501111°N 90.664444°W / 42.501111; -90.664444 (Dubuque County Courthouse ) Dubuque part of the County Courthouses in Iowa Thematic Resource (TR) (AD) 14 Dubuque County Jail Dubuque County Jail June 27, 1972 (# 72000473 ) 36 E. 8th St. 42°30′04″N 90°39′53″W / 42.501111°N 90.664722°W / 42.501111; -90.664722 (Dubuque County Jail ) Dubuque 15 Dubuque Freight House Dubuque Freight House October 11, 1979 (# 79003693 ) E. 3rd St. Extension 42°29′46″N 90°39′37″W / 42.496111°N 90.660278°W / 42.496111; -90.660278 (Dubuque Freight House ) Dubuque 16 Dubuque Millworking Historic District Dubuque Millworking Historic District November 7, 2008 (# 08001030 ) White, Jackson, and Elm between E. 6th and E. 11th Sts. 42°30′11″N 90°39′49″W / 42.5031°N 90.66359°W / 42.5031; -90.66359 (Dubuque Millworking Historic District ) Dubuque part of the Dubuque, Iowa Multiple Property Submission (MPS) 17 Dubuque Star Brewery Dubuque Star Brewery April 24, 2007 (# 07000348 ) 500 E. 5th St. 42°29′58″N 90°39′15″W / 42.499444°N 90.654167°W / 42.499444; -90.654167 (Dubuque Star Brewery ) Dubuque part of the Dubuque, Iowa MPS 18 Dubuque Trading Post-Village of Kettle Chief Archeological District Dubuque Trading Post-Village of Kettle Chief Archeological District November 21, 1988 (# 88002665 ) Address Restricted Dubuque part of the Mines of Spain Archeological MPS 19 Dubuque YMCA Building Dubuque YMCA Building January 31, 2002 (# 01001541 ) 125 W. 9th St. 42°30′07″N 90°40′00″W / 42.501944°N 90.666667°W / 42.501944; -90.666667 (Dubuque YMCA Building ) Dubuque 20 Julien Dubuque Bridge Julien Dubuque Bridge August 27, 1999 (# 99001034 ) U.S. Route 20 over the Mississippi River 42°29′30″N 90°39′17″W / 42.491667°N 90.654722°W / 42.491667; -90.654722 (Julien Dubuque Bridge ) Dubuque part of the Highway Bridges of Iowa MPS 21 Julien Dubuque Monument Julien Dubuque Monument November 21, 1988 (# 88002662 ) Confluence of the Mississippi River and Catfish Creek in Mines of Spain State Recreation Area 42°28′07″N 90°38′47″W / 42.468611°N 90.646389°W / 42.468611; -90.646389 (Julien Dubuque Monument ) Dubuque part of the Mines of Spain Archeological MPS 22 Dunleith and Dubuque Bridge Dunleith and Dubuque Bridge September 11, 2013 (# 13000690 ) 7600 Chavenelle Drive 42°29′21″N 90°46′33″W / 42.489166°N 90.775860°W / 42.489166; -90.775860 (Dunleith and Dubuque Bridge ) Dubuque 23 Eagle Point Park Historic District Eagle Point Park Historic District November 27, 2017 (# 100001834 ) 2601 Shiras Ave. 42°29′21″N 90°46′33″W / 42.489166°N 90.775860°W / 42.489166; -90.775860 (Eagle Point Park Historic District ) Dubuque 24 Epworth School Epworth School April 21, 2004 (# 04000340 ) 310 W. Main St. 42°26′46″N 90°56′08″W / 42.446111°N 90.935556°W / 42.446111; -90.935556 (Epworth School ) Epworth 25 Fenelon Place Residential Historic District Fenelon Place Residential Historic District November 16, 2015 (# 15000787 ) Hill St., 3 & 5th Sts., W., Fenelon Pl., Fenelon Place Elevator 42°29′46″N 90°40′11″W / 42.4962°N 90.6697°W / 42.4962; -90.6697 (Fenelon Place Residential Historic District ) Dubuque 26 Fenelon Place Elevator Fenelon Place Elevator August 3, 1978 (# 78001215 ) 512 Fenelon Pl. 42°29′47″N 90°40′08″W / 42.496389°N 90.668889°W / 42.496389; -90.668889 (Fenelon Place Elevator ) Dubuque 27 Four Mounds Estate Historic District Four Mounds Estate Historic District January 24, 2002 (# 01001487 ) 4900 Peru Rd. 42°33′21″N 90°40′51″W / 42.555833°N 90.680833°W / 42.555833; -90.680833 (Four Mounds Estate Historic District ) Dubuque 28 Four Mounds Site Four Mounds Site November 17, 2000 (# 00001076 ) Address Restricted Dubuque 29 Garland House Garland House July 7, 1983 (# 83000353 ) 1090 Langworthy Ave. 42°29′37″N 90°40′39″W / 42.493611°N 90.6775°W / 42.493611; -90.6775 (Garland House ) Dubuque 30 German Bank German Bank March 28, 1978 (# 78001216 ) 342 Main St. 42°29′50″N 90°39′53″W / 42.497222°N 90.664722°W / 42.497222; -90.664722 (German Bank ) Dubuque 31 Grand Opera House Grand Opera House September 20, 2002 (# 02001029 ) 135 8th St. 42°30′06″N 90°39′56″W / 42.501667°N 90.665556°W / 42.501667; -90.665556 (Grand Opera House ) Dubuque part of the Footlights in Farm Country: Iowa Opera Houses MPS 32 Haberkorn House and Farmstead Haberkorn House and Farmstead January 25, 1980 (# 80001449 ) West of Sherrill 42°36′24″N 90°49′21″W / 42.606667°N 90.8225°W / 42.606667; -90.8225 (Haberkorn House and Farmstead ) Sherrill 33 Mathias Ham House Mathias Ham House July 19, 1976 (# 76000764 ) 2241 Lincoln Ave. 42°31′53″N 90°39′02″W / 42.531389°N 90.650556°W / 42.531389; -90.650556 (Mathias Ham House ) Dubuque 34 Charles T. Hancock House Charles T. Hancock House April 10, 1986 (# 86000741 ) 1105 Grove Terr. 42°30′10″N 90°40′17″W / 42.502778°N 90.671389°W / 42.502778; -90.671389 (Charles T. Hancock House ) Dubuque 35 Ora Holland House Ora Holland House August 14, 1986 (# 86001613 ) 1296 Mt. Pleasant St. 42°30′02″N 90°41′04″W / 42.500437°N 90.684507°W / 42.500437; -90.684507 (Ora Holland House ) Dubuque 36 Hollenfelz House Hollenfelz House September 13, 1977 (# 77000513 ) 1651 White St. 42°30′30″N 90°40′05″W / 42.508333°N 90.668056°W / 42.508333; -90.668056 (Hollenfelz House ) Dubuque 37 Holy Ghost Catholic Historic District Holy Ghost Catholic Historic District September 15, 2011 (# 11000661 ) 2887-2921 Central Ave. 42°31′26″N 90°40′46″W / 42.523889°N 90.679444°W / 42.523889; -90.679444 (Holy Ghost Catholic Historic District ) Dubuque part of the Dubuque, Iowa MPS 38 Interstate Power Company Building Interstate Power Company Building June 26, 2008 (# 08000328 ) 1000 Main and 131 W. 10th St. 42°30′09″N 90°40′05″W / 42.50255°N 90.66803°W / 42.50255; -90.66803 (Interstate Power Company Building ) Dubuque part of the Dubuque, Iowa MPS 39 Jackson Park Historic District Jackson Park Historic District July 31, 1986 (# 86002102 ) Roughly bounded by 17th, Iowa, 10th and 9th, and Bluff and Montrose Sts. 42°30′21″N 90°40′12″W / 42.505833°N 90.67°W / 42.505833; -90.67 (Jackson Park Historic District ) Dubuque 40 Kelley House Kelley House January 30, 1978 (# 78001217 ) 274 Southern Ave. 42°29′07″N 90°39′51″W / 42.485278°N 90.664167°W / 42.485278; -90.664167 (Kelley House ) Dubuque 41 Zephaniah Kidder House Zephaniah Kidder House November 14, 1978 (# 78001218 ) 206 First Avenue, N.E. 42°26′47″N 90°55′44″W / 42.446389°N 90.928889°W / 42.446389; -90.928889 (Zephaniah Kidder House ) Epworth 42 Langworthy Historic District Langworthy Historic District August 12, 2004 (# 04000813 ) Langworthy, W. 3rd, Melrose Terrace, Hill and W. 5th, Alpine and Walnut between Solon and W. 5th 42°29′42″N 90°40′40″W / 42.495°N 90.677778°W / 42.495; -90.677778 (Langworthy Historic District ) Dubuque part of the Dubuque, Iowa MPS 43 Langworthy House Langworthy House October 14, 1975 (# 75000685 ) 1095 West Third Street 42°29′42″N 90°40′45″W / 42.495°N 90.679167°W / 42.495; -90.679167 (Langworthy House ) Dubuque 44 Lincoln School Upload image July 24, 1975 (# 75000687 ) About 4 miles (6.4 km) north of Farley 42°29′24″N 90°59′07″W / 42.49°N 90.985278°W / 42.49; -90.985278 (Lincoln School ) Farley 45 Lock and Dam No. 11 Historic District Lock and Dam No. 11 Historic District March 10, 2004 (# 04000171 ) 11 Lime St. 42°32′03″N 90°38′44″W / 42.53411°N 90.64542°W / 42.53411; -90.64542 (Lock and Dam No. 11 Historic District ) Dubuque part of the Upper Mississippi River 9-Foot Navigation Project MPS 46 T. Ben Loetscher House T. Ben Loetscher House November 2, 1989 (# 89001777 ) 160 S. Grandview Ave. 42°29′25″N 90°41′02″W / 42.490278°N 90.683889°W / 42.490278; -90.683889 (T. Ben Loetscher House ) Dubuque 47 Loras College Historic District Loras College Historic District June 19, 2020 (# 100005277 ) Roughly bounded by Alta Vista St., Loras Blvd., Kirkwood St., Cox St., West 17th St., and Henion St. 42°30′14″N 90°40′49″W / 42.503810°N 90.680176°W / 42.503810; -90.680176 (Loras College Historic District ) Dubuque 48 McMahon House McMahon House November 21, 1976 (# 76000765 ) 800 English Lane 42°28′48″N 90°40′19″W / 42.48°N 90.671944°W / 42.48; -90.671944 (McMahon House ) Dubuque 49 Memorial Building Memorial Building April 9, 2013 (# 13000148 ) 340 1st Ave., E. 42°29′05″N 91°07′15″W / 42.48463°N 91.120751°W / 42.48463; -91.120751 (Memorial Building ) Dyersville 50 Metz Manufacturing Company Upload image June 21, 2021 (# 100006658 ) 1690 Elm St. 42°30′35″N 90°39′54″W / 42.5097°N 90.6649°W / 42.5097; -90.6649 (Metz Manufacturing Company ) Dubuque 51 Mines of Spain Area Rural Community Archeological District Mines of Spain Area Rural Community Archeological District November 21, 1988 (# 88002663 ) Address Restricted Dubuque part of the Mines of Spain Archeological MPS 52 Mines of Spain Lead Mining Community Archeological District Mines of Spain Lead Mining Community Archeological District November 21, 1988 (# 88002664 ) Address Restricted Dubuque part of the Mines of Spain Archeological MPS 53 Mines of Spain Prehistoric District Mines of Spain Prehistoric District November 21, 1988 (# 88002666 ) Address Restricted Dubuque part of the Mines of Spain Archeological MPS 54 Mount Saint Bernard Seminary and Barn Mount Saint Bernard Seminary and Barn November 5, 1974 (# 74000784 ) 10336 Military Rd. 42°26′36″N 90°41′36″W / 42.443333°N 90.693333°W / 42.443333; -90.693333 (Mount Saint Bernard Seminary and Barn ) Dubuque 55 Old Chapel Hall Old Chapel Hall August 5, 1983 (# 83000355 ) 2050 University Ave. 42°29′55″N 90°41′34″W / 42.498611°N 90.692778°W / 42.498611; -90.692778 (Old Chapel Hall ) Dubuque 56 Old Main Street Historic District Old Main Street Historic District January 12, 1983 (# 83000356 ) Main St. between 1st and 4th Sts. 42°29′47″N 90°39′53″W / 42.496389°N 90.664722°W / 42.496389; -90.664722 (Old Main Street Historic District ) Dubuque Boundary increase 2015-10-13 57 Orpheum Theatre and Site Orpheum Theatre and Site November 14, 1972 (# 72000474 ) 405 Main St. 42°29′52″N 90°39′55″W / 42.497778°N 90.665278°W / 42.497778; -90.665278 (Orpheum Theatre and Site ) Dubuque 58 Johann Christian Frederick Rath House Johann Christian Frederick Rath House April 11, 1977 (# 77000514 ) 1204 Mt. Loretta Ave. 42°29′04″N 90°40′29″W / 42.484444°N 90.674722°W / 42.484444; -90.674722 (Johann Christian Frederick Rath House ) Dubuque 59 Redstone Redstone December 12, 1976 (# 76000766 ) 504 Bluff St. 42°29′49″N 90°40′03″W / 42.496944°N 90.6675°W / 42.496944; -90.6675 (Redstone ) Dubuque 60 George W. Rogers Company Shot Tower George W. Rogers Company Shot Tower November 7, 1976 (# 76000767 ) Commercial St. and riverfront 42°30′01″N 90°39′18″W / 42.500278°N 90.655°W / 42.500278; -90.655 (George W. Rogers Company Shot Tower ) Dubuque 61 Roshek Brothers Department Store Roshek Brothers Department Store March 17, 2010 (# 10000076 ) 250 W. 8th St. 42°30′01″N 90°40′08″W / 42.500386°N 90.668806°W / 42.500386; -90.668806 (Roshek Brothers Department Store ) Dubuque 62 Round Barn, Dubuque Township Round Barn, Dubuque Township June 30, 1986 (# 86001425 ) 2810 Cascade Rd. 42°28′24″N 90°42′27″W / 42.473333°N 90.7075°W / 42.473333; -90.7075 (Round Barn, Dubuque Township ) Dubuque Township part of the Iowa Round Barns: The Sixty Year Experiment TR 63 Sacred Heart School Sacred Heart School June 1, 2018 (# 100002486 ) 2238 Queen St. 42°31′01″N 90°40′02″W / 42.516875°N 90.667199°W / 42.516875; -90.667199 (Sacred Heart School ) Dubuque 64 St. Boniface of New Vienna Historic District St. Boniface of New Vienna Historic District September 29, 1999 (# 99001207 ) 7401 Columbus St. 42°33′03″N 91°06′54″W / 42.550833°N 91.115°W / 42.550833; -91.115 (St. Boniface of New Vienna Historic District ) New Vienna 65 St. Luke's Methodist Episcopal Church St. Luke's Methodist Episcopal Church April 23, 1998 (# 98000387 ) 1199 Main St. 42°30′13″N 90°40′09″W / 42.503611°N 90.669167°W / 42.503611; -90.669167 (St. Luke's Methodist Episcopal Church ) Dubuque 66 St. Mary's Catholic Church Historic District St. Mary's Catholic Church Historic District July 21, 2015 (# 15000436 ) 105 E. 15th, 1584 White, 1501 & 1561 Jackson Sts. 42°30′29″N 90°40′01″W / 42.507990°N 90.666916°W / 42.507990; -90.666916 (St. Mary's Catholic Church Historic District ) Dubuque 67 Sauser-Lane House Sauser-Lane House July 14, 1983 (# 83000354 ) 101 2nd Ave., SW. 42°17′52″N 91°00′43″W / 42.297778°N 91.011944°W / 42.297778; -91.011944 (Sauser-Lane House ) Cascade 68 Schroeder-Klein Grocery Company Warehouse Schroeder-Klein Grocery Company Warehouse February 28, 2011 (# 11000051 ) 40-48 Main St. 42°29′34″N 90°39′46″W / 42.492778°N 90.662778°W / 42.492778; -90.662778 (Schroeder-Klein Grocery Company Warehouse ) Dubuque part of the Dubuque, Iowa MPS 69 John and Marie (Palen) Schrup Farmstead Historic District John and Marie (Palen) Schrup Farmstead Historic District September 16, 2009 (# 09000713 ) 10086 Lake Eleanor Rd. 42°25′24″N 90°39′35″W / 42.423294°N 90.659653°W / 42.423294; -90.659653 (John and Marie (Palen) Schrup Farmstead Historic District ) Dubuque 70 Security Building Security Building August 8, 2006 (# 06000681 ) 800 Main St. 42°30′04″N 90°40′01″W / 42.501111°N 90.666944°W / 42.501111; -90.666944 (Security Building ) Dubuque part of the Dubuque, Iowa MPS 71 Seminary Hill Residential Historic District Seminary Hill Residential Historic District October 13, 2015 (# 15000723 ) Clarke Dr., N. Main & Madison Sts., Madison Park 42°30′33″N 90°40′19″W / 42.5092°N 90.6719°W / 42.5092; -90.6719 (Seminary Hill Residential Historic District ) Dubuque 72 Sherrill Mount House Sherrill Mount House July 11, 2002 (# 02000760 ) 5259 S. Mound Rd. 42°36′15″N 90°47′33″W / 42.604167°N 90.7925°W / 42.604167; -90.7925 (Sherrill Mount House ) Sherrill 1856; Jesse James reportedly stayed here; now the Black Horse Inn 73 J.H. Thedinga House J.H. Thedinga House November 7, 1976 (# 76000768 ) 340 W. 5th St. 42°29′51″N 90°40′04″W / 42.4975°N 90.667778°W / 42.4975; -90.667778 (J.H. Thedinga House ) Dubuque 74 Town Clock Building Town Clock Building January 24, 2002 (# 01001488 ) 823-25 Main St. 42°30′04″N 90°40′02″W / 42.501111°N 90.667222°W / 42.501111; -90.667222 (Town Clock Building ) Dubuque 75 Upper Central Avenue Commercial Historic District Upper Central Avenue Commercial Historic District September 19, 2012 (# 12000793 ) 1460-1965 Central Ave. 42°30′32″N 90°40′09″W / 42.508766°N 90.669084°W / 42.508766; -90.669084 (Upper Central Avenue Commercial Historic District ) Dubuque part of the Dubuque, Iowa MPS 76 Upper Iowa Street Historic District Upper Iowa Street Historic District October 13, 2015 (# 15000724 ) Iowa St. between W. 11th & 12th Sts. 42°30′15″N 90°40′03″W / 42.5041°N 90.6676°W / 42.5041; -90.6676 (Upper Iowa Street Historic District ) Dubuque 77 Upper Main Street Historic District Upper Main Street Historic District April 11, 2005 (# 05000275 ) 1000 and 1100 blocks of Main St. • Boundary increase (listed February 11, 2011, refnum 11000003): 909, 951, 955, 965 Main St. 42°30′07″N 90°40′05″W / 42.501944°N 90.668056°W / 42.501944; -90.668056 (Upper Main Street Historic District ) Dubuque part of the Dubuque, Iowa MPS 78 Washington Mill Bridge Washington Mill Bridge June 25, 1998 (# 98000788 ) Creek Branch Ln. over Lytle Creek 42°18′15″N 90°46′49″W / 42.304167°N 90.780278°W / 42.304167; -90.780278 (Washington Mill Bridge ) Bernard part of the Highway Bridges of Iowa MPS 79 Washington Park Washington Park July 14, 1977 (# 77000515 ) Bounded by 6th, 7th, Bluff, and Locust Sts. 42°29′57″N 90°40′05″W / 42.499167°N 90.668056°W / 42.499167; -90.668056 (Washington Park ) Dubuque 80 Washington Street and East 22nd Street Historic District Washington Street and East 22nd Street Historic District February 28, 2011 (# 11000052 ) 2162-2255 Washington St. and E. 22nd St. 42°30′52″N 90°40′08″W / 42.514444°N 90.668889°W / 42.514444; -90.668889 (Washington Street and East 22nd Street Historic District ) Dubuque part of the Dubuque, Iowa MPS 81 Washington Residential Historic District Washington Residential Historic District October 13, 2015 (# 15000725 ) 1100 - 1900 blocks White, Jackson & Washington Sts. 42°30′27″N 90°39′59″W / 42.5076°N 90.6664°W / 42.5076; -90.6664 (Washington Residential Historic District ) Dubuque 82 West Eleventh Street Historic District West Eleventh Street Historic District August 12, 2004 (# 04000814 ) Bounded by Grove Terrace, Loras Boulevard, and Wilbur and Walnut Sts. 42°30′09″N 90°40′25″W / 42.502392°N 90.673644°W / 42.502392; -90.673644 (West Eleventh Street Historic District ) Dubuque part of the Dubuque, Iowa MPS 83 Western Hotel Western Hotel November 7, 1976 (# 76000769 ) Southeast of Holy Cross on U.S. Route 52 42°35′36″N 90°58′52″W / 42.593333°N 90.981111°W / 42.593333; -90.981111 (Western Hotel ) Holy Cross 84 William M. Black (dredge) William M. Black (dredge) April 12, 1982 (# 82002618 ) E. 2nd St. 42°29′44″N 90°39′37″W / 42.495556°N 90.660278°W / 42.495556; -90.660278 (William M. Black (dredge) ) Dubuque 85 Ziepprecht Block Ziepprecht Block December 20, 2002 (# 02001541 ) 1347-53 Central Ave. 42°30′21″N 90°39′59″W / 42.505833°N 90.666389°W / 42.505833; -90.666389 (Ziepprecht Block ) Dubuque