INSPEC24053 - Laserfiche WebLink

Home Browse Search

E RfiM • Hi.2d.lY9~L d:•1° P. 5 Mrsy Marg982t Winter .1u1 2 1 PAge 4 Formation, it is unlikely that ground water in the overlying alluvium is a significanC portion of the recharge to the lower Laramie Formation. Ground water contained in sandstone beds overlain by shale beds is probably under partia]. artesian pressure. The sandstone beds appear to be recharged primarily in the ouCCrop areas. The primary recharge sources for [he alluvium and the Laramie Formation are percolation of applied irrigation water, seepage from canals and precipitation. Figure 2 is a schematic representation of i'he local hydrogeologic system. The recharge to the Laramie Formation occurs in the area indicated in Figure 2. Ground water then flows northeast through Che Laramie Formation Co discharge in the Cache La Poudre River. The Ketler well intercepts ground water enroute from Clte recharge area to the river. It is likely that the KeCler well tapped a sandstone aquifer that is under ppartial artesian pressure, However, this cannot be confirmed Uecauae no well records exisC. Conclusions The Laramie Formation underlies the alluvium i.n the Greeley area. To the southwest of Greeley, in Sec.ti.nns 2 and 11, TSN, R66W the Laramie forms the surface deposit. IC is easily eroded at the surface and sandy soils are formed on L'op of it. Aquifers within the Laramie are recharged aC the outcrop area. The primary recharge sources for the Laramie formation are percolation of applied irrigaCion water, seepage from canals and precipitation. Land that is taken ouC of irrigation and developed as commercial property ceases to be a recharge area. This appears to be Che problem wiCh the KeCler well. Recharge to the Laramie in the viciniCy of the KeCler well. occurred where the formation intersected the land surface in Sections 2 and 11, TSN, R66W. Recharge was cutoff by L'he commercial development pf the property in 1979-80 and "downstream" wells began to dry up. The northeast ~ of SecCion 11 was Caken ouC of irrigaCion and commercially developed in 1979-A0. T}tis area has ceased to provfde a recharge source to Che Laramie Formation. The south 'S of Section 2 has been residentially developed end this area no longer provides a recharge source (Figure 1}. Roth of. Chase areas have been ouC of irrigtion for at leasC 3'~ years. The area in Section 2 was developed prior to the area in Section 11. In addition, since the spillway has been installed along the east side of 35th Avenue between 10th Street and the Cache La Poudre, liCCle runoff has been allowed to percolate into the ground wafer system. Leonard qqa Cgrllunp Wale Enplneera,lna