"Maple Hill Park is precious jewel among the assets of Hibbing!"            
                                                                                                                              
 Friends of Maple Hill Park

                                                                                                                        neighbors@maplehillpark.org


"Maple Hill Park is a precious jewel among the assets of Hibbing!"            
                                                                                                                            
 Friends of Maple Hill Park

                                                                                                                      neighbors@maplehillpark.org
Glacial Geology and Soils of Maple Hill

At Maple Hill, about 20,000 years ago, during the St. Croix Glacial Phase, the
Rainy lobe of the Laurentide ice sheet (in Canada) advanced from
northeastern Minnesota to the southwest, depositing coarse loamy and sandy
material. Then, some 8,000 years later, the St. Louis sublobe of the Des
Moines glacial lobe (another part of the Laurentide ice sheet) advanced
eastward during the Nickerson-Alborn phase. This advance covered most of
Itasca county and the western edge of St. Louis County.  Maple Hill was
formed during the first advance by Rainy lobe material (brown colored soil
material) and then mantled by the St. Louis sublobe (red colored soil material).
The main geologic feature is a till mantled kame.

The glacial history is reflected in the soils found in the park.  The dominant
soils consist of the Hibbing series (red colored soil material) and very gravelly
sandy soils Udorthents (brown colored soil material) similar to a Rollins series.
The Hibbing soils are moderately well drained clay to clay loam soils deposited
by the St. Louis sublobe. The very gravelly somewhat excessively drained
sandy soils are similar to a Rollins soils were deposited by the Rainy Lobe.  
The Hibbing-Udorthents complex of soils support forests consisting mainly of
aspen, balsam fir, white spruce and red pine.  
Topography

The highest point of Maple Hill is 1653 feet at the National Geodetic Survey
Maple Hill Benchmark Number 2, monumented in 1947.  This is 200 feet
higher than much of the surrounding area.  Technical elevation information
is below:



National Geodetic Survey,   Retrieval Date = JULY  8, 2008
SJ0398 ***********************************************************************
SJ0398  DESIGNATION -  MAPLE HILL RM 2
SJ0398  PID         -  SJ0398
SJ0398  STATE/COUNTY-  MN/ST LOUIS
SJ0398  USGS QUAD   -  HIBBING (1983)
SJ0398
SJ0398                         *CURRENT SURVEY CONTROL
SJ0398  
____________________________________________________________
_______
SJ0398* NAD 83(1986)-  47 22 51.     (N)    092 57 18.     (W)     SCALED    
SJ0398* NAVD 88     -       503.696  (meters)    1652.54   (feet)  ADJUSTED  
SJ0398  
____________________________________________________________
_______
SJ0398  GEOID HEIGHT-         -29.91  (meters)                     GEOID03
SJ0398  DYNAMIC HT  -         503.736 (meters)    1652.67  (feet)  COMP
SJ0398  MODELED GRAV-     980,676.5   (mgal)                       NAVD 88
SJ0398
SJ0398  VERT ORDER  -  SECOND    CLASS 0
SJ0398
SJ0398.The horizontal coordinates were scaled from a topographic map
and have
SJ0398.an estimated accuracy of +/- 6 seconds.
SJ0398
SJ0398.The orthometric height was determined by differential leveling
SJ0398.and adjusted in June 1991.
SJ0398
SJ0398.The geoid height was determined by GEOID03.
SJ0398
SJ0398.The dynamic height is computed by dividing the NAVD 88
SJ0398.geopotential number by the normal gravity value computed on the
SJ0398.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
SJ0398.degrees latitude (g = 980.6199 gals.).
SJ0398
SJ0398.The modeled gravity was interpolated from observed gravity values.
SJ0398
SJ0398;                    North         East    Units  Estimated Accuracy
SJ0398;SPC MN N     -   197,940.      810,950.      MT  (+/- 180 meters
Scaled)
SJ0398
SJ0398                          SUPERSEDED SURVEY CONTROL
SJ0398
SJ0398  NGVD 29 (??/??/92)  503.420  (m)         1651.64   (f) ADJ UNCH    
2 0
SJ0398
SJ0398.Superseded values are not recommended for survey control.
SJ0398.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
SJ0398.See file dsdata.txt to determine how the superseded data were
derived.
SJ0398
SJ0398_U.S. NATIONAL GRID SPATIAL ADDRESS: 15TWN033474(NAD 83)
SJ0398_MARKER: DB = BENCH MARK DISK
SJ0398_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
SJ0398_SP_SET: SET IN TOP OF CONCRETE MONUMENT
SJ0398_STAMPING: MAPLE HILL NO 2 1947