􀁕􀁾􀀭􀁕􀀧􀁩􀀭􀀹􀀴 􀁕􀁾􀀺􀀴􀁯􀁁􀁍 \.., TU 􀁾􀁪􀁬􀁢􀁢􀀴􀁪 􀁲􀁵􀁵􀁵􀁵􀁵􀁾 _ Carter II Burgess Con5ultants in Engineering, Architedure, P1Clnning and the Environment JUly 12, 1994 Mr. John Baumgartner Town of Addison 16801 Westgrove Drive P.O. Box 144 Addison I TX 75001 Reference: Engineering Services Proposal For: A. Seepage Control & Restoration of Overflow Weir 8. Bank Stabilization/Erosion Control on White Rock Creek BehInd FinanCial Bldg. Dear John: 􀁾􀁮􀁣􀁬􀁯􀁳􀁥􀁤 hereafter please find out revised engineering services proposal for the two small projects noted above. First, the small overflow weir structure on the upper end of the creek is experiencing seepage around the structure rather than providing overflow on the weir as Intended. The Town Of Addison wishes to investigate possible repair. Whitney Smith of Reed Engineering Group and I visited the alte following oul' provious viSit. We concluded the foltowing: 1. Abutment cutoffs are required a minimum of 10 feet into both abutments of the weir, which which will most likely cause the loss of the American Elm(?) on the east abutment. 2. The construction of a reinforced concrete slope pavement with abutment extensions appears feasible, although depth of the slope and cut-off into the foundation must be determined in the field by the geotechnical engineer. (See attached sketches) 3. The existing large boulders at each end of the overflow weir must be removed temporarily to extend the proposed upstream slope pavement into the abutments. The boulders may then require modification of replacement to "fit" into the new abutments. 940120.COLCarter &8ur!Jess. Inc. 7950 E!mbrook S!,!ite 250 Dall<:ls, Texos 75247·4951 09-07-94 08:45AM. Mr. John Baumgartner July 12, 1884 Page 2 TU 􀁾􀁪􀁬􀁢􀁢􀀴􀁪 􀁪􀀭􀀧􀁕􀁕􀁪􀀯􀁕􀁕􀁾 4. For budgeting and proposal purposes, we would assume an approach slope paving height of ten (10) feet, with a toe wall 􀁣􀁵􀁴􀁾􀁯􀁦􀁦 depth of two (2) feet. See sketches. 6. The estimated construction cost, excluding tree removal and replacement is $3,900.00. This estimate does not include the inspection and recommendation services of the geotechnical engineer or the consultant and allows $500.00 for grouting. At least 2 site visits for both the geotechnical engineer and consultant should be anticipated at $90.00 per hour each, say $300.00/visit or $1,200.00 total. If the Town of Addison desires for Carter & Burgess to provide separate bid documents for this project, allow an additional $1,500.00 for P&S development. If this project is combined with the following bid documents, the P&S development may be reduced to $1,000.00. The total project engineering seNices fee for Project #1 would be either $2,700.00 2,700.00 or 􀀤􀁾􀀬􀀲􀀰􀀰􀀮􀀰􀀰􀀬 respaetivcly. The second project consists of bank stabilization on the south bank of the pond located behind the financial building adjacent to a private residential swimming pool. As you know. Carter &Burgess, Craig Olden Co. and Reed Engineering Group visited this site to consider site conditions and alternatives to provide this engineering services proposal and recommendation. The steep slope and large landscape boulders have caused sloughing of the bank which threatens slope stability and could result in structural damage to the adjacent retaining wall and swimming pool. Although complete dewatering of the pond would allow direct inspection of the bank and bottom conditions and also allow us to propose several alternative permanent solutions for bank stabilization and erosion control, it could also cause problems. Dewatering the pond, even slowly, could cause additional sloughing of the bank, endangering the retaining wall and SWimming pool unless concurrent baHast is added while dewatering. The limits and quantity of ballast required is unknown. Since ballast. may be required even during dewatering, we considered the possibility of adding ballast as a permanent solution for banK stabilization without dewaterIng. We all concluded this was a feasible solutIon but the limits and quantity of baHast rsquired was still unknown. Therefore. we propose the following engineering services to obtain this bank stabilization solution. 940120.COL 09-07-94 08:45AM Mr. John Baumgartner July 12, 1994 Page 3 TO 􀁧􀀳􀀱􀀶􀀶􀁾􀀳 P004/00B TASK ESTIMATE COST 1. Provide relative 3D mapping of the pond $ 500.00 behind the financial bldg. by float tube sectioning (2 men). This will allow us to better Craig Olden Co. gauge the limits of bank and bottom, estimate 1 day silt va. firm bottom depths and estimate limits Of required ballast (triangulate approximate locations • no survey). 2. Provide gradation of required ballast from 6" & $ 400.00 8" sizes down and recommend placement procedure. Reed Engineering Group 3. Estimate limits of ballast required and cost of $ 600.00 furnishing and placing ballast by others, with minimal dewatering. Carter & Burgess/Reed 4. Provide standard Town of Addison $ 1,500.00 specifications and contract documents including bid schedule and special technical sections. Carter & Burgess SUBTOTAL BASIC ENGINEERING SERVICES $ 3,000.00 SPECIAL SERVICES SITE VISITS AND ONSITE RECOMMENDATIONS REED ENGINEERING GROUP 2 @$300.EA $ 600.00 CARTER CARTER & BURGESS, INC. 2 @$300 EA 600.00 SUBTOTAL SPECIAL SERVICES $ 1.200.00 TOTAL ENGtNEERING SERVICES PROJECT #2 $ 4,200.00 Carter & Burgess will serve as prime contractor for these projects and will execute subcontract agreements with Craig Olden Go. and Reed Engineering Group prior to commencement of the work, upon notice to proceed from the Town of Addison. 940120.CDL Mr. John Baumgartner July 12, 1994 Page 4.We appreCiate the opportunity to submit these proposals to provide engineering services to the Town of Addison and look forward to commencement of work. Sincerely, CARTER & BURGESS. INC. 􀁦􀀻􀁱􀁾􀁾 B.J. Gensler, P.E. Associate Enclosure cc: Dave Reitz 940120,CDL J. Phillip Deaton, P.E. Vice President .. : ...-.. 􀁾 Carter =Burgess Consultants in Engineering, Architecture, Planning and the Environment July 12, 1994 Mr. John Baumgartner Town of Addison 16801 Westgrove Drive P.O. Box 144 Addison, TX 75001 Reference: Engineering Services Proposal For: A. Seepage Control & Restoration of Overflow Weir B. Bank Stabilization/Erosion Control on White Rock Creek Behind Financial Bldg. Dear John: Enclosed hereafter please find our revised engineering services proposal for the. two small projects noted above. First, the small overflow weir structure on the upper end of the creek is experiencing seepage around the structure rather than providing overflow on the weir as intended. The Town of Addison wishes to investigate possible repair. Whitney Smith of Reed Engineering Group and I visited the site following our previous visit. We concluded the following: 1. Abutment cutoffs are required a minimum of 10 feet into both abutments of the weir, which will most likely cause the loss of the American Elm(?) on the east abutment. 2. The construction of a reinforced concrete slope pavement with abutment extensions appears feasible, although depth of the slope and cut-off into the foundation must be determined in the field by the geotechnical engineer. (See attached sketches) 3. The existing large boulders at each end of the overflow weir must be removed temporarily to extend the proposed upstream slope pavement into the abutments. The boulders may then require modification of replacement to "-fit" into the new abutments. 940120.CDLCarter & Burgess, Inc. 7950 Elmbrook Suite 250 Dallas, Texas 75247-4951 (214) 638-0145 Metro (214) 263-2019 Fax (214) 638-0447 Mr. John Baumgartner July 12, 1994 Page 24. For budgeting and proposal purposes, we would assume an approach slope paving height of ten (10) feet, with a toe wall cut-off depth of two (2) feet. See sketches. 5. The estimated construction cost, excluding tree removal and replacement is $3,900.00. This estimate does not include the inspection and recommendation services of the geotechnical engineer or the consultant and allows $500.00 for grouting. At least 2 site visits for both the geotechnical engineer and consultant should be anticipated at $90.00 per hour each, say $300.00jvisit or $1,200.00 total. If the Town of Addison desires for Carter & Burgess to provide separate bid documents for this project, allow an additional $1,500.00 for P&S development. If this project is combined with the following bid documents, the P&S development may be reduced to $1,000.00. The total project engineering services fee for Project #1 would be either $2,700.00 or $2,200.00, respectively. The second project consists of bank bank stabilization on the south bank of the pond located behind the financial building adjacent to a private residential swimming pool. As you know, Carter & Burgess, Craig Olden Co. and Reed Engineering Group visited this site to consider site conditions and alternatives to provide this engineering services proposal and recommendation. The steep slope and large landscape boulders have caused sloughing of the bank which threatens slope stability and could result in structural damage to the adjacent retaining wall and swimming pool. Although complete dewatering of the pond would allow direct inspection of the bank and bottom conditions and also allow us to propose several alternative permanent solutions for bank stabilization and erosion control, it could also cause problems. Dewatering the pond, even slowly, could cause additional sloughing of the bank, endangering the retaining wall and swimming pool unless concurrent ballast is added while dewatering. The limits and quantity of ballast required is unknown. Since ballast may be required even during dewatering, we considered the possibility of adding ballast as a permanent solution for bank stabilization without dewatering. We all concluded this was a feasible solution but the limits and quantity of ballast required was still unknown. Therefore, we propose the following engineering services to obtain this bank stabilization solution. 940120.CDL Mr. John Baumgartner July 12, 1994 Page 4We appreciate the opportunity to submit these proposals to provide engineering services to the Town of Addison and look forward to commencement of work. Sincerely, CARTER & BURGESS, INC. 􀁦􀀺􀁱􀁾 B.J. Gensler, P.E. Associate J. Phillip Deaton, P.E. Vice President Enclosure cc: Dave Reitz Accepted Project No. 2 for an estimated fee of $4200.00 September 28, 1994 Ron Whitehead Date City Manager Town of Addison By:--=---:-;;-.......-;-----;----:;------940120.CDL Mr. John Baumgartner July 12, 1994 Page 3 TASK ESTIMATE COST 1. Provide relative 3D mapping of the pond $ 500.00 behind the financial bldg. by float tube sectioning (2 men). This will allow us to better Craig Olden Co. gauge the limits of bank and bottom, estimate 1 day silt vs. firm bottom depths and estimate limits of required ballast (triangulate approximate locations -no survey). 2. Provide gradation of required ballast from 6" & $ 400.00 8" sizes down and recommend placement procedure. Reed Engineering Group 3. Estimate limits of ballast required and cost of $ 600.00 furnishing and placing ballast by others, with minimal dewatering. Carter & Burgess/Reed 4. Provide standard Town of Addison $ 1,500.00 specifications and contract documents including bid schedule and special technical sections. Carter & Burgess SUBTOTAL BASIC ENGINEERING SERVICES $ 3,000.00 SPECIAL SERVICES SITE VISITS AND ONSITE RECOMMENDATIONS REED ENGINEERING GROUP 2 @$300 EA $ 600.00 CARTER & BURGESS, INC. 2 @$300 EA 600.00 SUBTOTAL SPECIAL SERVICES $ 1,200.00 TOTAL ENGINEERING SERVICES PROJECT #2 $ 4,200.00 Carter & Burgess will serve as prime contractor for these projects and will execute subcontract agreements with Craig Olden Co. and Reed Engineering Group prior to commencement of the work, upon notice to proceed from the Town of Addison. 940120.CDL q=jCARTER &BURGESS INC. L.:JL= ENGINEERS· PLANNERS· SURVEYORS _._.--(11 􀁾􀁊􀁉 ::J a+u-3 _tf J ---·c--·-:::--:. 􀁾 VOL, 1. 11-T7l-U.//,'IClJI-JB _ _ i .,__: .::firrtrk.wt1J:VoC.􀁾l-@:LWf/f/.-"= 􀁄􀀬􀁓􀀧􀁾􀁾􀀵􀀱􀀬􀀱􀀿􀁆 􀁾􀁟􀁾􀀱􀀭􀀻􀀺􀀬􀁟􀀴􀀬􀀱􀀨􀁐􀁟fY_ 􀀭􀁢􀀩􀀭􀁁􀁂􀁾􀀭􀁔􀀭􀀨 􀁲􀂥􀀻􀁩􀁩􀁩􀁻􀁍􀁉􀁩􀁊􀀼􀀻􀀯􀁚􀁾 􀁊􀁈􀀩􀁩􀀱􀁬􀁩􀁾􀀯􀁢􀁈􀀱 L 􀁁􀀨􀁌􀁥􀁬􀁴􀁾 {., X10' (12' V2t f,o't/" ');. 􀀳􀁂􀁾􀀯􀁬􀁦􀁊􀁦 􀀭􀀭􀀭􀀭􀀭􀁾􀀭􀀭􀀭� �... -----.....--......_-·---·-1--····-----·----.--... -------.-.--..--------. . --_....-.-. -------'---'------'--_.' . ----------------. --------'--' 􀀨􀀩􀁌􀁯􀁊􀁾􀁾􀁾􀁚􀁾􀁢􀁴􀁲􀁴􀀧􀁁􀁴􀀺􀀺􀀿􀀺d>Jt:b ' 4;tj-<. 1/; Btl Sy 􀀴􀀬􀀭􀁾􀁓 IS -0 􀀤􀁴􀀵􀁉􀁾 .' .-4roTI'lI..-tolJi..VO--L-, --.-:::-IF--?--1-t,13-/'ii1 fLC--1--el.f--.-.-.-. Town of Addison Project Application Project Description N/A apital0 Special Event 3 4 5 6 Project Type:0 OperatingJUnique DOperaring/Recurring -. Time to Complete (In months) Located in Planning Sector' Project Time Line T ul:ll ilude-et Co.!!t s (/.5: ooc). cJu • 12 15 18 􀁾􀁬 :UondlS 6 9 ,5 I I I I I I I J I I I I I I I ,S I I I I 5 I I I I I I I I s I I I 5 I I I I I I I I I I I Start Date #6 Phnse (engineering. ROW. acquisition. construction. etc.) ;: 1 LL:J;5?/n£'-N 􀁾􀁉 ; II 1 I I j ;s /:[ oDD,6U 􀀺􀀺􀀯􀀺􀀻􀀬􀀬􀁾􀁾􀀮􀀽􀀽􀀽􀀻􀀺􀀺􀀽􀀽􀁾􀁩􀀭􀀭􀁾􀀺􀁾􀀽􀀽􀁾 􀀺􀀽􀀽􀀽􀂢􀀺􀀽􀁾􀀺􀀽􀀽􀀽􀀺􀀻􀀺􀀺􀀽􀀺􀀽􀀻􀀻􀀻􀁡􀀴",,(',00 Fin:mce Department Use Projecr #= 􀁾 /£/C;:J 0 YC::lf 􀁓􀁾􀁣􀀡􀁏􀁲 􀁔􀁾􀂷􀁰􀁣􀀺 􀁆􀁾􀁾􀁾 Se4·