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City of Santa Ana <br />If Select pipeline material, At pipes less than <br />24 -inches in diameter, PVC and ductile iron pipe <br />are the two most economical choices, <br />Select an alignment to minimize impacts to <br />traffic. <br />kig Identify any critical crossings that result <br />in significant risk during construction and <br />recommend "potholing", physically locating the <br />utility vertically and horizontally in the field. <br />is Identify locations for appurtenances and their <br />impacts. An example is an air and vacuum <br />valve location relative to existing parking or a <br />blow -off located near a storm drain or sewer. <br />Construction Phasing <br />0 Identify Schools, Emergency Facilities and <br />Public/Community Centers. (here is an existing <br />church adjacent to the project site and another <br />along Bristol Street near the Santiago Creek <br />Crossing. Santiago Elementary School is <br />located south of the John Garthe Reservoir site. <br />Develop Plan to Minimize Impacts <br />Maintain Access to Commercial/Businesses/ <br />Residences - Limit Length of Work Zone <br />11 Maintain Public Use of the Park <br />-.. _.POMPALAUGNMENT <br />,err„ /.MN'NVe, <br />f0 <br />v.' <br />f15Y6a� .a un6uvp= / /POTENTIALAMNMMY <br />fJ I,I:p11AnaMI <br />hx�C,n4\ ( Eltto-kx� I / � .BN,P.a, <br />txcervu !mrn,an <br />sn,as�Nre <br />vmwnntquvNMkmNemT <br />EXISTING SANTIAGO CREEK BRIDGE <br />Bore and lack 16 -inch Water Cine 30rinch Steel Casing <br />Utility Ray Option Utilize Abandoned 184tich Water Line <br />Pler Wali Option -Above Ground installation <br />SANTIAGO CREEK BRIDGE CROSSING <br />Santiago Creep Crossing <br />- Utilize the alignment of air abandoned <br />N Evaluate three options: <br />pipeline through the bridge deck: Based <br />- Bore and Jack the creek crossing: this <br />on our review, there is an abandoned <br />has minimal impacts to the creek or <br />18 -inch pipeline that was installed in <br />bridge but results in 4 to 6 weeks of 24- <br />the original bridge deck. The ability <br />hour traffic control. <br />to utilize this alignment depends on <br />- Utilize the pier walls: We have done this <br />the accessibility of the bridge cell and <br />several times for other agencies, the <br />modifications at either bridge abutment <br />installation tends to be quicker than boring <br />and jacking but the permitting for work <br />within the creek and modifications to the <br />existing structure tend to increase project <br />schedule and can be difficult to obtain. <br />251-16 <br />