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• • Exhibits D and E <br />City of Lamar Gravel Pit Narrative <br />The proposed gravel pit is located on the West side of Clay Creek <br />ap`rro:;imately 2 miles southeast of Lamar. There are several pits that have <br />been excavated ter the City's water supply recharge field en the eastern <br />edge of the proposed 5.? acre pit. The e;:isting recharge pits have been <br />filled by water carried by the Fort Bent irrigation ~=anal, therefore the <br />e::isting vegetation en the site is seir~eu~hat atypical of the normal <br />riparian plant community found along the Clay Cr'eeF: flood plain. <br />Soils found on this site are e:;tremely variahle, ranging from Tivoli <br />(Valent) sand, to Vona sandy loam en the West side of the proposed pit. <br />The soils en the East side of the pit and ranging tc the Southern end are <br />t+asically a rr~i::ture of r+rater-deposited gravel and wind-deposited sand, <br />interspersed ~.vith a sir~all inclusion of gravel brea!<:s 9n the southern <br />portion of the pit area. Topography ar, the West side is fiat and breaks <br />oft to steeper slopes of lu°i+ on the east sroe. <br />The vegetative cover presently on this site is aPPro;;imate7y 60% <br />annual !•ieeds (see attached giant c~~rnposition list). Because of the wide <br />spectrum of soil conditions that e~,ist en this site and the fact that the <br />Eastern portion is cur rentiy flooded, the giant community is not to he <br />consid?red normal far the typical range sites associated u.~ith these soil <br />series found in this area. Plant cover on this site is appro:;imately 15%, <br />with wide areas of bare soil, The only woody vegetation that is found on <br />the proposed gravel Pit area is plains cottc~nwood fFopuius sargentril, <br />tarr~arish (Tarnari?: per~tandra) and sand sagebrush (Artemesia filifolia). <br />With the exception cf samd sagebrush, the woody vegetation is only a trace <br />of 'the piani composition on the site. <br />Gra=_ses male up only 32%• of <br />Primary sF?c-es recororrended in <br />(Bouteloua gr'acilis), buffalograss <br />(5paroboius cryPtandru=_), sideaats <br />western wheatgrass (AgroPyren sniit <br />were found in more than trace amounts <br />the plant CnYiirilUnlty, taut would he the <br />the reclaimat ion plan. °lue grarna <br />(Buchloe dactyloide=_.), °and dropseed <br />grarna (Bouteinua curtipendula) and <br />h9i) are the only grass sF•z~i°s that <br />on the proposed pit site. <br />kE~LAINIA.TI~4J PLAID <br />Prior to the initial mining „peration, .any sa',vageable tcpsuii should <br />stoci::piled out of the gray of tyre mining activity and should be protected <br />firorr~ nutrient leaching by saedin9 a rOVel" CI'4F of yellow sweetclover and <br />an annual srr~ail grain. If the mining operation is to b? of short duration, <br />a waterproof covering couid.be used in lieu of a vegetative cover, <br />roll~_a~i ng the removal of the gravel andlor sand, the land should be <br />sloped at not greater than 4:1 slopes and then recovered by the stoclpi7ed <br />topsoil tc a depth ofi 12 to 15' inche=_. It is presumed that tt~e final <br />n~i ning vai11 not e%:pose be-drocl.:, which would preclude the establishment of <br />