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Home My WebLink AboutContract 35190-A3 (2) AMENDMENT NO. 3 STATE OF TEXAS S CITY SECRETARY CONTRACT NO. rYQ 7 AS (No M&C Needed) COUNTY OF TARRANT S WHEREAS, the City of Fort Worth (City) and Dunaway Associates, L.P. , (Engineer) made and entered into City Secretary Contract No. 35190, (the Contract) which was authorized by the City Council by M&C C-21995 on the 6th day of March 2007; and WHEREAS, the Contract involves engineering services for the following project: Hammond Street Drainage Improvements, Project No. 00488 WHEREAS, it has become necessary to execute Amendment No. 3 to said Contract to include an increased scope of work and revised maximum fee; NOW THEREFORE, City and Engineer, acting herein by and through their duly authorized representatives, enter into the following agreement which amends the Contract: 1 . Article I of the Contract is amended to include the additional engineering services specified in a proposal letter dated November 28, 2011, a copy of which is attached hereto and incorporated herein. The cost to City for the additional design services to be performed by Engineer total $31,338 .00 . 2 . Article II of the Contract is amended to provide for an increase in the maximum fee to be paid to Engineer for all work and services performed under the Contract, as amended, so that the total fee paid by the City for all work and services shall not exceed the sum of $243,194 . 00 . City of Fart Worth,Texas Amendment to Engineering Agreement PMO Oficial Release Date:10.0121710 Page 1 of 2 OFFICIAL RECORD CITY SECRETARY FT. WORTH, TX � 3 . All other provisions of the Contract which are not expressly amended herein shall remain in full force and effect. EXECUTED on this the SD day of tJD� 2012, in Fort Worth, Tarrant County, Texas. -04 a'Nz ICY ST: 4 000 000 fy 4 b�City Secretary o n°ax's 09000 a°x( 4 ouaa 1 ICY APPROVAL RECOMMENDED: �� St4VED: Douglas W±ersig, P.E. Fernando Costa Director, Transportation and Public Assistant City Manager Warks Dunaway Associates, L.P. ENGINEER BY -�&SM. v l Name: Stephen R. James, P.E. Sr. Principal, Director, Public Services Sector 550 Bailey Ave. , #400 Fort Worth, TX 75107 APPROVE S TO FORM AND LEGALITY- r.,_1 Assistant City Attorney IVB &C � IRED City of Fort Worth,Texas 1 Amendment to Engineering Agreement ' PMO Oficial Release Date:8.182010 Page 2 of 2 OFFICIAL RECORD CITY SECRETARY FT. WORTH, TQC DUNIAWAY DA No. 2005041 November 28, 2011 Mr. Chad Simmons, P.E. City of Fort Worth Integrated Program Management 309 W.7°t Street, Suite 1020 Fort Worth,Texas 76102 Reference: City Project No. 00488 Hammond St. Drainage Improve. & Hopkins Ct. Flume Reconstruction Amendment No.3 Mr. Simmons; This letter constitutes our request for supplemental authorization for tasks outside the scope of services of our current contract. The additional work includes the following tasks. Hammond Street Drainage Improvements 1. Additional Concept Engineering - At our September 29, 2011 review meeting, Dunaway was asked to prepare a cost comparison of four alternative drainage system improvement scenarios. The following describes the anticipated tasks and our assumptions to provide these additional analyses. a. Field Surveys—Obtain additional field survey data: I. Obtain finished floor elevations for structure expected to be Inundated by surface waters. The finished floor elevations will be used in determining potential impact of flooding on present property values. ii. Obtain spot elevations at key locations, such as downstream tie-in point at railroad location, etc, b. Hydraulic Analysis — Perform hydraulic analysis of storm drain and/or detention improvements for the following scenarios to develop conceptual project costs: i. Alternative 1 —Original Recommendation. Phase 1 -- Construct the storm drain improvements recommended in August 26, 2010 Report, but also include additional capacity beneath IH- 35W and improvements downstream to the railroad to pick up addition depth in the system to improve the HGL throughout the system. 550 PalloyAventle,5u le,100 4 ral Worm,loxas 76101 a ie1:81'1.335.1121 4fux 1317.335.71.37:csuncaxryussnc:iates.coin Amendment No. 3 November 28, 2011 Page 2 Phase 2 — Replace the existing system downstream of the railroad to the existing system outfall at Prince Street with a single conduit adequate to convey the 100-year discharges. ii. Alternative 2-- Detention Beneath Flarnmond Street. Phase 1 -- Construct the storm drain improvements outlined in Option B-1 of the July 21, 2011 letter report of Contract Amendment No. 2 scope items. This option includes underground storage beneath Hammond Street and no detention at the church property west of Timothy. This option also does not require any additional capacity beneath IH-35W. Phase 2 — Replace the existing system downstream of IH-35W to the existing system outfall at Prince Street with a single conduit adequate to convey the 100-year discharges. iii. Alternative 3--Single Conduit Along Entire Length, Phase 1 — Replace the entire existing system downstream of IH-35W to the current outfall location at Prince Street, including lowering of the system between IH-35W and the railroad. Please 2 -- Provide additional capacity beneath IH-35W and construct a new system upstream of IH-35W along Hammond and Timothy Streets. iv. Alternative 4--Above-Ground Storage West of IH-35W. Phase 1 -- Evaluate the possibility of purchasing two rows of homes along Hammond Street and construction of surface detention, including a storm drain system in Timothy Street upstream of the surface detention area. This option would not require additional capacity beneath 1H-35W. Phase 2 — Replace the existing system downstream of 1H-35W to the existing system outfall at Prince Street with a single conduit adequate to convey the 100-year discharges. V. Debbie Lane Culvert Improvements -- Determine the culvert capacity required at the Debbie Lane crossing to convey the anticipated 100-year frequency peak discharge. c. Project Report -- Prepare a report summarizing the alternatives evaluated, including the assumptions made, methodologies used, and the conclusions reached during the hydraulic analyses. The report will also include a comparison of the engineer's opinion of probable construction costs for each alternative evaluated, including the present values of homes expected to be flooded, as well as exhibits illustrating the scalae of each alternative. 2, Project Development — Conduct up to two (2) project status meetings with CITY during the course of the analysis phase. These meetings shall be used to update 550 861oy Memo,Sihto 100 Fore Woilh.iexos 74107 3 TO 817.335.112.1 Fax:917.335.7437 dunovlayossoclotos.eem Amendment No. 3 November 28, 2011 Page 3 CITY as to status of project and to determine CITY's preference in recommended improvement option for future design. A summary of the total project is as follows: 1. Original Contract $ 119,461 2. Amendment#1 $ 76,055 3. Amendment f#2 $ 16,340 4. Amendment##3 $ 31,338 TOTAL REVISED BUDGET $ 243,194 Please do not hesitate to call me if you have any questions or require additional information regarding this proposal. Sincerely, DUNAWAY ASSOCIATES, L.P. LAA" Stephen R. James, P.E. Sr. Principal Director, Public Sector Services 00488-Anlendmeni 3 2011.1128 550 Moy Avenue,Suite 400 -1 Fort ftrlh,Tows 76107 S ToR[317.335.1121 A lux;817.335.7437=dunowoyossoclnlos.corn Q G v O O v b d d O le�oll�a[o2d $ $ r'' 0, LA M 00 c' y, m rn fro w ry n7 +h t4 N N N <? h N I [7 slsn�yaaila $ i I o g I o lelolgng cal to yr I (91011 $ 8 0 u0]leulpiooj luerynsuoaryng 5� $ o iq �uelptisuO�gnS $ � � w I IIU IeiolgnS aad r�� " i w w � krn� feiowswim ;ioddn5 ❑ anjZeJjsjuliupy .r r Aea;jaj7LO w f Y o r 2 tPalOV) a oo io 00 a Q V w W o Ly laalFlBl�� g I ry a �a a ;7aload 2 »ajoJd ni S d ❑ asieg3 $, Ni9lecl3ngid `r� ' N� .i re re ri a N LA aEu53 o L F-� Ul � w u F2 J r di Vn' v M LL > rCr TSI O ' ❑ �. d � � � � OI H C7 O �il a � �C Qt; p]:, 'N� O O N N M b ❑ lfJ Ll 2 w �► w �� E !a 4