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Public Land Survey Monument Report <br /> Center Corner of Section 3, T7N R1OE (City ID 710020) <br /> December 30,2016 <br /> To:Jeff Quamme <br /> City of Madison,WI Engineering Division <br /> Mapping Section <br /> This is to certify that on December 22, 2016 I found a brass cap monument set in concrete beneath a <br /> standard manhole cover, representing the Center Corner of Section 3, T7N R10E. The monument was <br /> intact and all 4 witness ties were intact per the Feb 16,2004 monument record by Carl Sandsnes. <br /> Below is a comparison of the coordinates and elevations from the 2004 monument record and my survey: <br /> Source Northing(US ft) Easting(US ft) Elevation(ft) <br /> 2004 Sandsnes 491684.06 844588.42 951.35 <br /> 2016-12-22 491684.02 844588.44 951.60 <br /> Difference +0.04 +0.02 +0.25 <br /> 95% accuracy of my values is +/- 0.06 ft horizontal and +/- 0.05 ft vertical, based on a combined <br /> adjustment of GPS and total station observations. <br /> My horizontal coordinates are Dane County Coordinates, U.S. survey feet, NAD83(2007) datum, relative <br /> to the Emil Street GPS base station (MAON) at 43°02'12.78285"N, 89°24'34.27099"W (Easting <br /> 814396.30, Northing 469050.00 U.S. survey feet). The Wisconsin Coordinate Reference Systems <br /> (WISCRS)parameters were used to compute Easting,Northing coordinates. The horizontal differences in <br /> the table above are at least partially due to datum shift. <br /> My 2016 elevation is in the NAVD 88(1991)datum(1991=original adjustment),determined from the same <br /> measurement adjustment as for the horizontal coordinates, from the Emil Street base station at ellipsoid <br /> height 815.84 ft (bottom of antenna mount), NAD 83(2011)(EPOCH 2010.00) datum, and the GEOIDI2 <br /> (=12A =12B here) geoid model, then subtracting 0.17 ft to convert from NAVD 88(2012) to NAVD <br /> 88(1991). The 2004 and 2016 elevations should be in the same datum. For a local check on my 2016 <br /> elevation, I determined elevations (relative to my 2016 elevation) for two of the 2004 witness ties: the <br /> chiseled X on the telecomm pad to the north=951.41 ft;and the chisel X on the NW rim of the manhole to <br /> the SE=954.20 ft. <br /> Signed, <br /> 1"--, C;; <br /> Dan Rodman <br /> Professional Land Surveyor <br /> City of Madison Parks Division <br /> 210 Martin Luther King,Jr.Blvd, Suite 104 <br /> Madison,WI 53701 <br /> Office 608-266-6674 <br /> Cell 608-209-7012 <br /> II( (C aecA C <br />