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HomeMy WebLinkAboutRES.2545.06-21-2010 BILL NO. 10-81 RESOLUTION NO. ���� A RESOLUTION AUTHORIZING THE CITY MANAGER TO EXECUTE ADDENDUM NO. 1 TO AMENDMENT NO. 1 TO A GENERAL ENGINEERING SERVICES AGREEMENT WITH HORNER AND SHIFRIN, FOR THE CAPE GIRARDEAU LEVEE SYSTEM CERTIFICATION, IN THE CITY OF CAPE GIR.ARDEAU, MISSOURI BE IT RESOLVED BY THE COUNCIL OF THE CITY OF CAPE GIRARDEAU, MISSOURI, AS FOLLOWS : ARTICLE l . The City Manager, for and on behalf of the City of Cape Girardeau, Missouri, is hereby authorized to execute . Addendum No. 1 to Amendment No. 1 to the General Engineering Services Agreement with Horner and Shifrin, for the Cape Girardeau Levee System Certification, in the City of Cape Girardeau, Missouri . A copy of said Addendum is attached to this Resolution and made a part hereof . S PASSED AND ADOPTED THIS �� DAY OF �� , 20 % E. ediger, Mayor �tg���y�;a�.\ ATTEST: ��' ��i�r� �� -�� �� ' o $ '� 0 r � � � Gayl L. Conrad, City C J oN ~ TKF IINI � * S EA�' Homer& Shifrin, Inc. 5200 Oakland Ave. St. Louis MO 63110-1490 (314) 531-4321 • Fax: (314� 531-6966 Addendum No. 1 (Phase 2) to Amendment No.1 Levee System Investigation to General Engineering Services Agreement between the CITY OF CAPE GIRARDEAU, MISSOURI ("Owner"), and HORNER & SHIFRIN, INC. ("Engineer"). SECTtON 1 - SCOPE OF WORK Note: only the portions of work described in the Cosf Estimate Worksheet for Phase 2 will be performed in this phase. The remainder wil/be performed in Phase 3, to be subsequenfly known as Addendum No. 2 to Amendment No.1 Introduction: The OWNER requires assistance in conducting technical reviews, investigating field conditions and locating instructions and records relating to the Mississippi River flood protections system and documentation of evidence showing conformance of the City's Mississippi River flood protections system with 44CFR 65-10. The ultimate use of this documentation will be to provide the basis for subsequently certification of such compliance, thus enabling the system to be re-accredited by the Federal Emergency Management Agency ("FEMA") for flood mapping purposes. Objectives: The objectives of this work are described in the major tasks below. The Engineer's efforts will include the following tasks necessary for reaccreditation but it is expressly understood by the OWNER and ENGINEER that these efforts by the Engineer shall nof be construed as "certifying"compliance with 44CFR 65-10 or a guarantee of the performance of the f/ood control system(s). Such "certi�cation" can not be offer�ed unfi!professional liability insurance policies are rewritten to include coverage for this work. In order to fumish evidence of compliance with 44CFR 65-10, Engineer shall accomplish the major tasks: ITEMS OF WORK Cape Girardeau Levee Data Assembly and Analysis 1. General Description: The levee system is located on the right bank of the Mississippi River between river miles 51.6 and 52.8 and was completed in 1964. a. Floodwalls make up 1.15 miles of the total flood protection. ' b. They consist of inverted T shapes on rock and in natural and select compacted earth c. There are 5 closure gates within the fioodwall. i. Two railroad gates. ii. Three road gates. d. Levees make up the other 0.41 miles of protection. e. Two pump stations (at Merriwether and Mill Streets) provide for interior drainage during flood events. 2. Data Assemblv and Analvsis: Notwithstanding any other requirements of the contract it is understood by the parties that Assembly and Analysis of Data pertaining to the Levee System by Horner & Shifrin will be used to determine whether, to the best of our knowledge and belief, the levee system was designed and was constructed in accordance with sound engineering practices to provide protection from the base flood (a "positive finding"). This determination will be based on information made available to us on the original design and construction, as well as � testing and engineering studies performed by H&S or its subconsultants. The determination does not Certify any greater degree of confidence of performance, expressed or implied. Both parties further recognize that it is impossible to find hidden defects or flaws that could lead to local failures of the levee system. It is also understood that during a flood event, it is common practice, and a responsibility of the Levee Owner to "fight the flood", by which is meant that the levee system will need constant surveillance and immediate action if local failures present themselves. It is further understood that H&S is not under contract to perform continued surveillance of the levee system to ensure the condition of the levee does not deteriorate or change over time from the conditions at the time these services were performed. a. Any elements that present an unacceptable risk to the line of protection in the opinion of H&S will require repair or replacement prior to issuing a report of positive finding. b. The report summarizing the Data Assembly and Analysis will include a statement limiting the validity of its contents to five years from the date of the report. c. If repairs or additional construction are required in order for issuing a positive finding, the engineering for those actions is not included in this proposal. A Supplemental Agreement will be required. d. This Data Assembly and Analysis study will only consider the 1% (100 year) flood event per FEMA requirements for accreditation. It is understood by H&S that Levee System was designed for the .02% (500 year) flood event. 3. Homer& Shffrin intends to provide the Data Assembly and Analysis report based on the principles of the ACOE "Certification of Levee Systems for the National Flood Insurance Program"version dated September 12, 2007. The procedure outlined in this document will satisfy FEMA requirements. 4. References for the analysis of the existing levee system will be as follows: a. Engineer Regulation (ER) 1110-2-100, 15 February 1995, Periodic Inspection and Continuing Evaluation of Completed Civil Works Structures. b. ER 1110-1-12,21 July 2006, Quality ManagemeM. c. ER 1110-2-1405, 30 September 1982, Hydraulic Design for Local Flood Protection Projects. d. Engineering Manual (EM) 1110-2-1418, 31 October 1994, Channel Stabiliry Assessment for Flood Control Projects. e. EM 1110-2-1601,30 June 1994, Hydraulic Design of Flood Control Channels. f. EM 1110-2-1416, 15 October 1993, River Hydraulics g. EM 1110-2-1913,30 April 2000, Design and Construction of Levees. h. EM 1110-1-1904, 30 September 1990, Settlement Analysis. i. EM 1110-2-1901,30 April 1993, Seepage Analysis and Control for Dams. j. ETL 1110-2-569, 1 May 2005, Engineering and Design, Design Guidance for Levee Under-seepage k. EM 1110-2-1902, 31 October 2003, Slope Stability. I. EM 1110-2-1908,30 June 1995, Instrumentation of Embankment Dams and Levees m. EM 1110-2-1914,29 May 1992, Design, Construction and Maintenance of Relief Welis. n. ER 1110-2-1806, 31 July 1995, Earthquake Design and Evaluation for Civil Works Projects. o. EM 1110-2-2705,31 March 1994, Structural Design of ClosureStructures for Local Flood Control Protection Projects. p. EM 1110-2-2007,30 April 1995, Structural Design of Concrete Lined Flood Control Channels. q. EM 1110-2-2100,01 December 2005, Stability Analysis of Concrete Structures. r. EM 1110-2-2104,20 Aug 03 (Change 1), Strength Design for Reinforced Concrete Hydraulic Structures. s. EM 1110-2-2105,31 May 1994 (Change 1), Design of Hydraulic Steel Structu res. t. EM 1110-2-2502,29 September 1989, Retaining and Flood Walls. u. EM 1110-2-2504,31 March 1994, Design of Sheet Pile Walls. v. EM 1110-2-2705,31 March 1994, Structural Design of Closure Structures for Local Flood Protection Projects. w. EM 1110-2-2902, 31 March 1998 (Change 1), Conduits, Culverts, and Pipes. x. EM 1110-2-2906,1 5 January 1991, Design of Pile Foundations. y. EM 1110-2-6054,01 December 2001 , Inspection, Evaluation and Repair of Hydraulic Steel Structures. z. EM 1110-2-2002, 30 June 1995, Evaluation and Repair of Concrete Structures. aa.ER 1110-2-8157,31 Jan 1997, Responsibility for Hydraulic Steel Structures. bb.EM 1110-2-3105,30 November 1999, Mechanical and Electrical Design of Pumping Stations cc. EM 1110-2-3102, February 1995, General Principles of Pumping Station Design and Layout. dd.Engineering Technical Letter(ETL) 1110-2-571, 10 April 2009, Guidelines for Landscape Planting and Vegetation Management at Levees, Floodwalls, Embankment Dams, and Appurtenant Structures. ee.Engineering Circular(EC) 1110-2-6065, 1 July 2007, Engineering and Design - Comprehensive Evaluation of Project Datum. ff. EC 1110-2-6058, 20 November 2005, Stability analysis of Concrete Structures. gg.Engineering Regulation (ER) 1110-2-8160, 1 March 2009, Policies for Referencing Project Elevation Grades to Nationwide Vertical Datum. 5. Surve . Our field crew or sub-consultant surveyor, will use GPS equipment and MoDOT RINEX data to provicle cross-sections along the length of the wall at 100 feet on center, and at gates and other areas of special interest. a. Allow for one week of crew time for pick-up surveys. 6. Geotechnical Borinqs and Laboratory Reaorts• Shannon &Wilson, Inc. has proposed providing 1 S borings, including one landside toe, one crest, and one riverside toe boring for each earthen levee reach (9 borings) one at each closure structure plus an additional at the north closure structure (6 borings) and 3 borings at the floodwall monoliths.. a. See the Shannon &Wilson proposed scope for the details of the geotechnica{ program. 7. Interior Drainage. An in-depth review of all of the Flood Insurance Study for the City of Cape Girardeau is not required. H&S will check for"obvious errors" per the ACOE Engineering Technical Letter(draft) 1110-2-570. a. For existing levees a reanalysis of interior stages is not included in this study proposa{. If the existing levee is considered adequate, the coinciderrt interior flooded area should already be mapped. b. To verify validity of the existing interior drainage system the following task items will be performed: i. Review of the depicted local flooding and its sources ii. Comparison of currently mapped areas and the volumes they contain with estimated runoff from their contributing rainfall areas iii. Review of the pumping capacity and gravity outlet characteristics of the stormwater conveyance through the flood protection line to the river 8. Hydraulics/Hydrology lFreeboardL H&S will provide a hydraulic study that considers the probability of being exceeded. The analysis must include a probabilistic treatment of the types of events that alone, or in concert with other events produce a level of flooding that results in a 1%chance of exceedance of the levee system protection. This level will be compared to the height of levee protection 9. Closures. We understand that there are 5 closure structures a. H&S will review the designs of the new closures based on the references above. b. H&S will review the design of the existing closures based on current criteria referenced above. The proposed hours contained herein assume that calculations are available from the ACOE for review. 10.Flood Walls._ H&S will review the existing calculations available for the flood walls to verify the design loading conditions in the original engineering analysis and design meet current criteria, and a general review of the wall design meets current c�iteria. a. Structural Stability criterion shall be based on EC 1110-2-6058. b. Structural Strength criteria shall be based on EM1110-2-2104. 11.As-Built Plans. The plans provided by the ACOE will be compared to the existing construction. This task will be accomplished by comparing the plans to our findings during the field inspection. . a. There are no available records to deterrnine which method of construction was used: impervious clay or dredged material with an impervious clay cap. b. A plan set will be organized so that elements of the system that have been reconstructed or replaced will be correctly included. c. Provide the Certified As-Built Plan set to FEMA. This set will be As- Built only to the extent that we are provided the information. 12.Geotechnical Analysis. Assess embankment protection using procedures described in USACE Engineering Manual 1110-2-1913 (Design and Construction of Levees) so that no appreciable erosion of the levee embankment can be expected during the base flood and that anticipated erosion will not result in failure of the levee embankment or foundation directly or indirectly through reduction of the seepage path and subsequent instability. The factors to be addressed in such analyses include, but are not limited to: a. Expected itow velocities (especially in constricted areas); b. Expected wind and wave action; c. Ice loading; d. Impact of debris; e. Slope protection techniques; f. Duration of flooding at various stages and velocities; g. Embankment and foundation materials; h. Levee alignment, bends, and transitions; and i. Levee side slopes. 13. Geotechnical Evaluation: Analyze embankment and foundation stability using procedures described in USACE Engineering Manual 1110-2-1902 (Slope Stability) to demonstrate that seepage into or through the levee foundation and embankment during loading conditions associated with the base flood will not jeopardize embankment or foundation stability. Factors to be addressed shall be: a. Depth of flooding; b. Duration of flooding; c. Embankment geometry and length of seepage path at critical locations; d. Embankment and foundation materials; e. Embankment compaction; f. Penetrations; g. Other design factors affecting seepage (e.g., drainage layers); h. Other design factors affecting embankment and foundation stability (e.g., berms). i. Review corrugated metal pipe (CMP) inspection records and reports. 14.Geotechnical Evaluation (Settlement AnalYsis). Assess the potential and magnitude of future losses of freeboard as a result of levee settlement and demonstrate that freeboard will be maintained within the minimum freeboard standards using procedures described in USACE Engineering Manual EM 1110-1-1904 (Settlement Analysis). This analysis must address: a. Embankment loads, b. Compressibility of embankment soils, c. Compressibility of foundation soils, d. Age of the levee system, and e. Construction compaction methods. 15.Electrical & Mechanical. Pertains to system pump stations. Condition assessment is the analysis method to be used in the data assembly and analysis to determine failure modes of pump stations and drainage structures. The results of Periodic Inspection shall be incorporated by reference unless changes have been made between the Periodic Inspection and this data assembly. .In which case inspections should follow the same process as done during the Periodic Inspections The following list of items contributes to pump station failure modes and should be considered in certification determination: a. plant building b. pumps c. motors, engines, fans, gear reducers, etc. d. power supply e. megger testing on pump motors f. motor control center g. enclosures, panel, conduit and ducts h. circuit breakers i. instruments j. sumps/wet well k. intake and discharge pipes I. ftap gatesJflap valves/pinch valves m. trash racks n. sluice/slide gates o. fuel systems for pump engines 16.Site Investi at�ons. Conduct site visit to collect pertinent information to support the certification determination or identify areas that need further analysis. Tasks to accomplish this scope Item: a. Assemble an inspection team comprised of disciplines similar to the periodic inspection team under the ICW program. b. Walk the entire length of the levee system to physically inspect all aspects of the system. 17.Sewer Inspections. There are sewers ranging along the Protection System. If it becomes advisable based on inabitity to directly inspect the condition of the sewers, a contract supplemental agreement may be necessary. 1 S. Emergency Response Plan & Status . a. Review the ERP. b. Make Recommendations for improvement if we recognize opportunities. 19.Probabilitv of Failure and Conseauences not in scope. This is a probabilisiic approach fo failure analysis from the `�iossible interaction of the levee system componentsA and is based on the Failure Mode Analysis as applied fo dam safety invesiigation contained in the US Dept. of the lnterior"Dam Safety Risk Analysis Mefhodology". Thi.s analysis is not required by FEMA. 20.Operations Plans and Criteria. a. Levee systems must be maintained in accordance with an officiatly adopted maintenance plan, and a copy of this plan must be provided to FEMA. The maintenance plan must document the forrnal procedure that ensures that the stability, height, and overall integrity of the levee and its associated structures and systems are maintained. b. The maintenance plan must include the following minimum criteria: c. A list of maintenance activities to be performed; d. Frequency of their performance; and e. Person by name or title responsible for their performance. 21.Data Assemblv and Analvsis a. Write first draft of Findings of Data Assembly and Analysis (DAA) i. Coordinate with City of Cape Girardeau on any needed modifications prior to issuance of the Findings. b. Prepare As-Built drawings and exhibits for draft DAA c. Edit and write final DAA Findings d. Edit drawings and exhibits for final DAA Findings 22. Not Included: a. The cost of Railroad Protective Liability Insurance. b. Mapping of utilities. Services ENGINEER will provide necessary narrative documentation, maps and exhibits, and other information which may be required to support the statements and conclusions reached. ENGINEER will also communicate with state and federal agencies as needed, and provide such civil and hydraulic engineering analyses necessary to support the statements and conclusions. Coordination ENGINEER will perform the above work on the basis of information fumished by OWNER. SECTION 2—ESTIMATED COST Based upon the above-referenced SCOPE OF WORK, we estimate the cost to fumish the items within the scope to be $41,410. RESPONSIBILITIES OF OWNER It is ENGINEER's understanding that OWNER will provide the following assistance, information, and/or related elements: A. Assistance by placing at ENGINEER's disposal all avaifable current information pertinent to this assignment; including previously developed plans, specifications, reports, permits, and other data. B. . Appropriate liaison with the OWNER'S staff involved in this effort. C. Reasonable access to other data and records related to this assignment that ENGINEER may determine a need for. OWNER shall be responsible for, and ENGINEER shall rely on correctness of information, drawings, etc. made available by the OWNER, without the need for verification. COMPENSATION A. Amount of Payment and Statements 1. Engineer proposes to complete the above Scope of Services at our hourly rates described in Attachment A to the estimated amount in Section 2 above. In the event that additional work is required, OWNER will be informed and the additional work will not be performed without express written consent of OWNER. 2. Statements from ENGINEER to OWNER requesting progress payments shall be prepared and transmitted for payment in the manner prescribed in the Terms and Conditions below. B. The terms of compensation and other terms and conditions goveming this work shall be as defined by General Engineering Senrices Agreement dated May 5, 2009 except as modified herein. SCHEDULE ENGtNEER proposes to complete the work defined herein within 2 months following OWNER's notice to proceed with the above described services. The adherence to this schedule is, of course, contingent on timely receipt from the OWNER of intormation needed by the ENGINEER to carry out this assignment, and prompt review and retum of all documents submitted to OWNER by ENGINEER for comment/approval, and the physical completion of elements subject to inspection and review. LIMITATION OF LIABILITY Limitation of liability. In recognition of the relative risks, rewards, and benefits of the Project to both OWNER and ENGINEER, the total liability, in the aggregate, of ENGINEER and ENGINEER's CONSULTANTS as welt as of their respective officers, directors, employees, or agents, or any of them, to OWNER and anyone claiming by, through or under OWNER, for any and all injuries, claims, losses, expenses or damages whatsoever arising out of or in any way related to the services provided under this Agreement, including but not limited to the negligence, errors, omissions, strict liability or breach of contract of ENGINEER or ENGINEER'S consultants as well as their respective officers, directors, employees, or agents, or any of them, to the fullest extent permitted by law, shall be limited to and shall not exceed liability coverage described in Paragraph H.4.of the General Services Agreement to which this assignment is Amendment 1 of Addendum 1. . THIRD PARTY BENEFICIARY LANGUAGE No Third Party Beneficiaries. This Agreement is not intended to confer upon any person other than the Parties any rights or remedies hereunder. We sincerely appreciate this opportunity to be considered for professional services for the City of Cape Girardeau. If there are any questions conceming our proposal, please contact either of the undersigned. If this proposal is acceptable, please sign and return one copy to us for our files. Thank you for your consideration of Homer& Shifrin. ctfu mi ted, „� �--- ��� ,�1�c` rz�.�� � �L �° William P. Clarke ene Rov k Date Presid t Project Manager � n/, ,/ �� Scott Meye Gayl onrad Date City Mana�! City Cterk cosr�asK woaus�r Foa: cxrr as c.iwe an�noe�u v�u..�,�wew�dun n a�..na..M eaa�wr syMw r�ww�+to� LlYH 011TA�eswe�rt w.ta.nr ranr�.r�n.p. d�a�nrro�esnw►Te�u► lAsoR: TMt Talt L� L�oa Y!L P!s PY ►O� PM C7' PE E�E p , P�! 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