No preview available
HomeMy WebLinkAboutC03-213 Elam Construction, Inc.' ENGINEERING DEPARTMENT (970) 328-3560 FAX (970) 328-8789 TDD (970) 328-8797 • ~ • EAGLE COUNiI; COLORADO August 5, 2003 Elam Construction, Inc. 1225 South 7~' St. Grand Junction, Co, 81501 NOTICE OF AWARD Re: Eagle-Vail Pedestrian Trail Improvements ~ n3 - ~~.~ o s~ EAGLE COUNTY BUILDING P.O. Box 850 550 Broadway Eagle, Colorado 8163 I -0850 Please be notified that on August S, 2003 the Eagle County Board of County. Commissioners awarded the above referenced project to-Elam Construction, Inc. in the amount of $473,649.00. Enclosed please find four copies of the contract documents including the agreement. In accordance with Section 18 of the Instructions to Bidders, you are to execute all four copies of the Agreement, attach the Payment Bond, Performance Bond, and Proof of Insurance required by the documents, and return all four copies to Eagle County within fifteen (15) days. xc: Chrono/file EAGLE COUNTY BOARD OF COUNTY COMMISSIONERS -114Is~1~.-(~a~lagl~~,-F,~iei TOM C. STONE, CHAIRMAN PRO-TEM N • EAGLE COUNTY INVITATION TO BID EAGLE-NAIL PEDESTRIAN'T'RAIT- IMPROVEMEN'T'S Eagle County will receive sealed bids for the Eagle-Vail Pedestrian Trail Improvements until 3;30 p.m., July 21, 2003, in the Eagle County Engineering Department, 500 Broadway, Eagle, Colorado 81631, at which time bids will be opened and read aloud. Bidding documents may b~ obtained at the Eagle County Engineering Department at the above address~otrhby~cs~ tions70o 328-3560. Each bid shall be accompanied by Bid Security in accordance wi Bidders. ' AGREEMENT ' THIS AGREEMENT is dated as of the ~ day of L~ , in the year 2003, by and between Board of County Commissioners Eagle County, Colorado ' (hereinafter called OWNER) and Elam Construction, Inc. (hereinafter called CONTRACTOR) OWNER and CONTRACTOR, in consideration of the mutual covenants set forth, agree as follows: ARTICLE 1-WORK CONTRACTOR shall complete all work as specified or indicated in the Contract Documents. The work is generally described as follows: Construction of approximately 4,450 feet of a paved pedestrian path system consisting of four separate paths. Construction of approximately 590 feet of MSE retaining wall, concrete walk and hand rail. ARTICLE 2 -ENGINEER The project has been designed by the Eagle County Engineering Department and has designated Helen Migchelbrink, P.E., who is hereinafter called ENGINEER, and will assume all duties and responsibilities, and will have the rights and authority assigned to ENGINEER in the Contract Documents in connection with the completion of the work in accordance with the Contract Documents. ' ARTICLE 3 -CONTRACT TIME 3.1 The work will be substantially completed on or before November 1, 2003, and completed and ready for final payment in accordance with paragraph 14.13 of the General Conditions on or before November 15, 2003. ' 3.2 LIQUIDATED DAMAGES: OWNER and CONTRACTOR recognize that time is of the essence of this Agreement and that OWNER will suffer financial loss if the work is not substantially complete within the time specified in paragraph 3.1 above, plus any ' Agreement Page 1 i ~ extensions thereof allowed in accordance with Article 12 of the General Conditions. They also recognize the delays, expense, and difficulties involved in proving a legal or arbitration proceeding the actual loss suffered by OWNER if the work is not substantially complete on time. Accordingly, instead of requiring such proof, OWNER and CONTRACTOR agree that as liquidated damages for delay (but not as a penalty) CONTRACTOR shall pay OWNER Five hundred twenty dollars ($520.00) for each day that expires after the time specified in paragraph 3.1 for substantial completion until the work is substantially complete. ARTICLE 4 -CONTRACT PRICE 4.1 OWNER shall pay CONTRACTOR for performance of the Work in accordance with the projected cost bid item schedule listed below. The funds appropriated for this project are equal to or in excess of the contract total amount of Four Hundred Seventy Three Thousand Six Hundred Forty Nine Dollars and 00/100 ($473,649.00). The project will be paid for by quantities actually installed multiplied by the unit prices given. However, OWNER does reserve the right to eliminate portions of the project or reduce quantities in specific bid items in order to accommodate possible additions to other specific bid items that may be needed for the good of the project. The CONTRACTOR will make every effort to notify the OWNER representative on site if a quantity overrun on any bid item is expected on that item before final quantities are installed. Any quantity increases or decreases are to be in accordance with Article 10 (Changes in the Work) of the General Conditions. Item No. Descri tion Q Unit Unit Price Amount 1 Clearing & Grubbing 1 LS $20,000.00 $20,000.00 2 Excavation and Embankment 1 LS $53,790.00 $53,790.00 3 Aggregate Base Course (Class 6) 2283 Tons $28.00 $63,924.00 4 Asphalt (HBP) 773 Tons $55.00 $42,515.00 5 Top Soil: Remove/Replace/Dispose 1 LS $15,000.00 $15,000.00 6 Revegetation & Seeding 1 LS $4,500.00 $4,500.00 7 Install Storm Manhole 1 EA $4,500.00 $4,500.00 8 Adjust Manholes 8 EA $275.00 $2,200.00 9 Relocate Ped Heads 2 EA $1,350.00 $2,700.00 10 Relocate Electric Meter 1 EA $2,000.00 $2,000.00 11 Relocate Signal Control Box 1 EA $2,800.00 $2,800.00 12 Insta1118" CMP Culvert 90 LF $92.00 $8,280.00 13 F.E.S. 4 EA $450.00 .$1,800.00 14 Riprap 1.5 CY $1,000.00 $1,500.00 15 Type C Inlet 1 EA $4,500.00 $4,500.00 16 Extend 24" HDPE Pipe 10 LF $200.00 $2,000.00 17 Connecting Band 1 EA $250.00 $250.00 Agreement Page 2 i ~ Item No. Descri tion Qty Unit Amount 18 Stone Wall Removal 1 LS $3,000.00 $3,000.00 19 Remove Trees 15 EA $300.00 $4,500.00 20 Hand Rail Over Tunnel 65 LF $115.00 $7,475.00 21 Sign Relocation 8 EA $65.00 $520.00 22 New Signs 52 EA $100.00 $5,200.00 23 Sign Posts 43 EA $50.00 $2,150.00 Retaining Wall, Concrete Walk, Bailin 24 Structure Excavation 30 CY $150.00 $4,500.00 25 Structure Backfill (Class 1) 30 CY $200.00 $6,000.00 26 Aggregate Base Course (Class 6) 21 CY $125.00 $2,625.00 27 Concrete Block Facing MSE Walls 1645 SF $32.00 $52,640.00 28 Bikeway Railing (Steel) 595 LF $90.00 $53,550.00 29 Concrete Class D 136 CY $275.00 $37,400.00 30 Reinforcing Steel (Epoxy Coated 9750 LBS $1.00 $9,750.00 31 Guardrail, Type 3 290 LF $32.00 $9,280.00 32 End Section 1 EA $2,200.00 $2,200.00 33 Pedestrian Rub Rail 50 LF $14.00 $700.00 34 Sanitary Facility 1 EA $400.00 $400.00' 35 Erosion Control 1 LS $7,500.00 $7,500.00 36 Traffic Control 1 LS $20,000.00 $20,000.00 37 Surveying 1 LS $12,000.00 $12,000.00 TOTAL $473,649.00 ARTICLE 5 -PAYMENT PROCEDURES CONTRACTOR shall submit Applications for Payment in accordance with Article 14 of the General Conditions. Applications for Payment will be processed by ENGINEER as provided in the General Conditions. 5.1 PROGRESS PAYMENTS: OWNER shall make monthly progress payments on account of the Contract Price on the basis of CONTRACTOR'S Applications for Payments as recommended by ENGINEER, as provided below. All progress payments will be on the basis o f t he p rogress o f t he w ork m easured b y the s chedule o f v alues p rovided f or i n paragraph 14.1 of the General Conditions. 5.1.1 Prior to Substantial Completion, progress payments will be in an amount equal to: Agreement Page 3 • 90% of the work completed until fifty percent (50%) of the work is performed, after which no additional retainage shall be withheld, and 90% of materials and equipment not incorporated in the work but delivered and suitably stored, less in each case the aggregate of payments previously made. 5.1.2 Upon Substantial Completion, OWNER shall pay an amount sufficient to increase total payments to CONTRACTOR to 95% of the Contract Price, less such amounts as ENGINEER shall determine in accordance with paragraph 14.7 of the General Conditions. 5.2 'FINAL PAYMENT: Upon final completion and acceptance in accordance with paragraph 14.13 of the General Conditions, OWNER shall pay the remainder of the Contract Price as recommended by ENGINEER as provided in said paragraph 14.13. The final payment shall not be made until after final settlement of this contract has been duly advertised at least ten days prior to such final payment by publication of notice thereof at least twice in a public newspaper of general circulation published in Eagle County, and the Board of County Commissioners has held a public hearing, thereupon and complied with the Revised Statutes 1973, Section 38-26-107 as amended. Final payment shall be made in accordance with the requirements of aforesaid statute. ARTICLE 6 -CONTRACTOR'S REPRESENTATIONS In order to induce OWNER to enter into this Agreement, CONTRACTOR makes the following representations: 6.1 CONTRACTOR has familiarized himself with the nature and extent of the Contract Documents, work, locality, laws, ordinances, rules and performance of the work. and with all local conditions, and federal, state, and -local regulations that in any manner affect cost, progress, or 6.2 CONTRACTOR has studied carefully all reports of investigations and tests of subsurface and latent physical conditions at the site or otherwise affecting cost, progress, or performance of the work which were relied upon by ENGINEER in the preparation of the Drawings and Specifications, and which have been identified in the Supplementary Conditions. 6.3 CONTRACTOR has made, or caused to be made, examinations, investigations, and tests and studies of such reports and related data in addition to those referred to in paragraph 6.2 as he deems necessary for the performance of the work at the Contract Price, within the Contract Time, a nd i n accordance with other terms and c onditions of the Contract ' Agreement Page 4 C~ 6.4 • Documents; and no additional examinations, investigations, tests, reports, or similar data are, or will be required by CONTRACTOR for such purposes. CONTRACTOR has correlated the results of all such observations, examinations, investigations, tests, reports, and data with the terms and conditions of the Contract Documents. 6.5 CONTRACTOR has given ENGINEER written notice of all conflicts, errors, or discrepancies that he has discovered in the Contract Documents and the written resolution thereof by ENGINEER is acceptable to CONTRACTOR. ARTICLE 7 -CONTRACT DOCUMENTS The contract Documents which comprise the entire Agreement, made a part hereof, and consist of the following: 7.1 This Agreement (Pages 1 to 7, inclusive). 7.2 Invitation to Bid consisting of 1 page. 7.3 Instructions to Bidders (Pages 1 to 6, inclusive). 7.4 Performance and other Bonds, identified as exhibits ~, and consisting of _ pages. 7.5 Notice of Award, Notice to Proceed. 7.6 General Conditions (Pages 1 to 41, inclusive). 7.7 General Construction Requirements & Specifications consisting of 14 pages. 7.8 Project Drawings consisting of 33 sheets. 7.9 Addenda numbers 1 to 3 ,inclusive. 7.10 Documentation submitted by CONTRACTOR prior to Notice of Award (Pages to ,inclusive). 7.11 Any modification, including Change Orders, duly delivered after execution of Agreement. There are no Contract Documents other than those listed above in this Article 7. The Contract Documents may only be altered, amended, or repealed by a Modification (as defined in Section 1 of the General Conditions). ' Agreement -Page 5 ~ • • ARTICLE 8 -MISCELLANEOUS ' 8.1 The terms used in this Agreement which are defined in Article 1 of the General Conditions shall have the meanings indicated in the General Conditions. ' 8.2 No assignment by a party hereto of any rights under, or interests in the Contract Documents will be binding on another party h ereto without the written c onsent of the party sought to be bound; and specifically, but without limitation, moneys that may ' become due and moneys that are due may not be assigned without such consent (except to the extent that the effect of this restriction may be limited by law), and unless specifically stated to the contrary in any written consent to an assignment, no assignment ' will release or discharge the assignor from any duty or responsibility under the Contract Documents. ' 8.3 OWNER and CONTRACTOR each binds himself, his partners, successors, assigns and legal representatives to the other party hereto, in respect to all covenants, agreements, and obligations contained in the Contract Documents. ' 8.4 ATTORNEY'S FEES: In the event of litigation between the parties hereto regarding the interpretation of this Agreement, or the obligations, duties or rights of the parties ' hereunder, or if suit otherwise is brought to recover damages for breach of this Agreement, or an action be brought for injunction or specific performance, then and in such events, the prevailing party shall recover all reasonable costs incurred with regard to such litigation, including reasonable attorney's fees. ' 8.5 APPLICABLE LAW: This Agreement shall be governed by the laws of the State of Colorado. Jurisdiction and venue of any suit, right, or cause of action arising under, or in connection with this Agreement shall be exclusive m Eagle County, Colorado. ' IN WITNESS WHEREOF, the parties hereto have signed this Agreement in triplicate. One counterpart each has been delivered to OWNER, CONTRACTOR, and ENGINEER. All ' portions of the Contract Documents have been signed or identified by OWNER and CONTRACTOR, or by ENGINEER on their behalf. This Agreement will be effective on ~ 2003. ' Agreement Page 6 ,~ ~ OWNER: ~~ ~ ®~~,, COUNTY OF EAGLE, STATE OF COLORADO, ~, ~ ~ By and Through Its BOARD OF COUNTY ' ATTEST. ~~ ~~' ® COMMISSIONERS C'~ By: erk to the Board of Michael L. Gallagher, Ch ' County Commissioners CONTRACTOR: ELAM CON TRUCTION, INC. By: Name; arold F. Elam ' Title: President ' STATE OF COLORADO ) County of P~Iesa ) The foregoing was acknowledged before me this 11th da of August , 2003 E~am onstruct on, Inc. by Harold F. Elam as President of WITNESS my viand and official seal. My commission expires 9-6-04 1 ~~ ~ ~~~ ~ rotary Public Heather Telford Agreement Page 7 ' ~ THE AMEF~ICAN INSTITUTE OF ARCHITECTS ' Bond #929303344 AIA Document A311 ~ Performance Bond ' KNOW ALL MEN BY THESE PRESENTS: that ELAM CONSTRUCTION, INC. (Here insert full name and address ~ legal title of Contractor) 1225 SOUTH 7TH. ST. GRAND JUNCTION, CO 81501 ' as Principal, hereinafter called Contractor, and, WESTERN SURETY COMPANY (Here insert full name and address or legal title of Surety} ' P O BOX 5077 SIOUX FALLS, SD 57117-5077 as Surety, hereinafter called Surety, are held and firmly bound unto EAGLE COUNTY ' (Here insert full name and address or legal title of Owner) P.O. BOX 850 EAGLE, CO 81631 ' as Obligee, hereinafter called Owner, in the amount of FOUR HUNDRED SEVENTY THREE THOUSAND SIX HUNDRED FORTY NINE AND 00/100 Dollars (~ 473,649.00), ' for the payment whereof Contractor and Surety bind themselves, their heirs, executors, administrators, successors and assigns, jointly and severally, firmly by these presents. ' WHEREAS, Contractor has by written agreement dated ,entered into a contract with Owner for ' (Here insert full name address and description of project) EAGLE-NAIL PEDESTRIAN TRAIL IMPROVEMENTS, LOCATED IN EAGLE COUNTY, COLORADO ' in accordance with Drawings and Specifications prepared by (Here insert full name and address or legal title of Architect) ' which contract is by reference made a part hereof, and is hereinafter referred to as the Contract. ' AIA DOCUMENT A311 PERFORMANCE BOND AND LABOR AND MATERIAL PAYMENT BOND AIA O 1 FEBRUARY 1870 ED THE AMERICAN INSTITUTE OF ARCHITECTS, 1735 N.Y. AVE, NW., WASHINGTON, D.C. 20006 ~RFORMANCE BONS NOW, THEREFORE, THE CONDITION OF THIS OBLIGATION is such that, if Contractor shall promptly and faithfully perform said Contract, then this obligation shall be null and void; otherwise it shall remain in full force and effect. The Surety hereby waives notice of any alteration or extension of time made by the Owner. Whenever Contractor shall be, and declared by Owner to be in default under the Contract the Owner having performed Owner's obligations thereunder, the surety may promptly remedy the default, or shall promptly 1) Complete the Contract in accordance with its terms and conditions, or defaults under the contract or contracts of completion arranged under this paragraph) sufficient funds to pay the cost of completion less the balance of the contract price but not exceeding, including other costs and damage for which the Surety may be liable hereunder, the amount of the contract price", as used in this paragraph shall mean the toral amount payable by Owner to Contractor under the contract and any amendments thereto, less the amount properly paid by owner to Contractor. 2) Obtain a bid or bids for completing the Contract in accordance with its terms and conditions, and upon de- termination by Surety of the lowest responsible bidder, or, if the Owner elects, upon determination by the Owner and the Surety jointly of the lowest responsible bidder, arrange for a contract between such bidder and Owner, and make available as Work progresses (even though there should be a default or a succession of Signed and sealed this 8th day of August, 2003 Witness Stephen J. Ra.spar, Assistant Secretary Any suit under this bond must be instituted before the expiration of two (2) years from the date on which final payment under the Contract falls due. No right of action shall accrue on this bond to or for the use of any person or corporation other than the Owner named herein or the heirs, executors, adminis- trators, or successors of the Owner. ELA NSTRU ION, INC P ' ipal Seal Harold F. EIa~.Im~e~ President WESTERN SURETY COMPANY SuretyAA ,, Seal "l~`l o (Title) CHERYL M. HOSTED, Attorney-in-Fact AIA DOCUMENT A311 PERFORMANCE BOND AND LABOR AND MATERIAL PAYMENT BOND AIAO FEBRUARY 1970 ED THE AMERICAN INSTITUTE OF ARCHITECTS,1735 N. Y. AVE., N.W., WASHINGTON, D.C. 20008 r '~ THE AMEI~AN INSTITUTE OF A~HITECTS ~,..,~ ~~l~~y~~`~!~J ~:~1I ,v~ -U *~~ Bond #929303344 AIA Document A311 Labor and Material Payment Bond THIS BOND IS ISSUED SIMULTANEOUSLY WITH PERFORMANCE BOND IN FAVOR OF THE OWNER CONDITIONED ON THE FULL AND FAITHFUL PERFORMANCE OF THE CONTRACT KNOW ALL MEN BY THESE PRESENTS: that ELAM CONSTRUCTION, INC. (Here insert full name and address or legal Utle of Contractor) 1225 SOUTH 7TH. ST. GRAND JUNCTION, CO 81501 as Principal, hereinafter called Contractor, and, WESTERN SURETY COMPANY (Here insert full name and address or legal title of Surety) P O BOX 5077 SIOUX FALLS, SD 57117-5077 as Surety, hereinafter called Surety, are held and firmly bound unto EAGLE COUNTY (Here insert full name and address ~ legal UUe of Owner) P.O. BOX 850 EAGLE, CO 81631 as Obligee, hereinafter called Owner, for the use and benefit of claimants as hereinbelow defined, in the amount of FOUR HUNDRED SEVENTY THREE THOUSAND SIX HUNDRED FORTY NINE AND 00/100 Dollars ($ 473,649.00), (Here insert a sum equal to at least ene-half of the contract price) for the payment whereof Principal and Surety bind themselves, their heirs, executors, administrators, successors and assigns, jointly and severally, firmly by these presents. WHEREAS, Principal has by written agreement dated entered into a contract with Owner for (Here insert full name address and description of project) EAGLE-NAIL PEDESTRIAN TRAIL IMPROVEMENTS, LOCATED IN EAGLE COUNTY, COLORADO in accordance with Drawings and Specifications prepared by (Here insert full name and address or legal Utle of Architect) which contract is by reference made a part hereof, and is hereinafter referred to as the Contract. AIA DOCUMENT A311 PERFORMANCE BOND AND LABOR AND MATERIAL PAYMENT BOND AIA O 3 FEBRUARY 1970 ED THE AMERICAN INSTRUTE OF ARCHITECTS, 1735 N.Y. AVE., N.W., WASHINGTON, D.C. 20006 LABOR A~ MATERIAL PAYN~NT BOND ' NOW, THEREFORE, THE CONDITION OF THIS OBLIGATION is such that, if Principal shall promptly make payment to all claimants as hereinafter defined, for all labor and material used or reasonably required for use in the performance of the Contract, then this obligation shall be void; otherwise it shall remain in full force and effect, subject, however, to the following conditions: 1. A claimant is defined as one having a direct con- tract with the Principal or with a Subcontractor of the Principal for labor, material, or both, used or reasonably required for use in the performance of the Contract, labor and material being construed to include that part of water, gas, power, light, heat, oil, gasoline, telephone service or rental of equipment directly applicable to the Contract. 2. The above named Principal and Surety hereby jointly and severally agree with the Owner that every claimant as herein defined, who has not been paid in full before the expiration of a period of ninety (90) days after the date on which the last of such claimant's work or labor was done or performed, or materials were furnished by such claimant, may sue on this bond for the use of such claimant, prosecute the suit to final judgment for such sum or sums as may be justly due claimant and have execution thereon. The Owner shall not be liable for payment of any costs or expenses of any such suit. 3. No suit or action shall be commenced hereunder by any claimant: a) Unless claimant, other that one having a direct contract with the Principal, shall have given written notice to any two of the following: the Principal, the Owner, or the Surety above named, within (90) day after such claimant did or performed the last of the work or labor, or furnished the las of the materials for which said claim is made, stating with substantial accuracy the amount claimed and the name of the Signed and seals this 8th day of August , 2003 . (Witness) Stepehn J. IZa.spar, Assistant Secretary fitness) party to whom materials were furnished, or for whom the work or labor was done or performed. Such notice shall be served by mailing the same by registered mail or certified mail; postage prepaid, in an envelope addressed to the Principal, Owner or Surety, at any place where an office is regularly maintained for the transaction of business, or served in any state in any manner in which legal process may be served in the state in which the aforesaid project is located, save that such service need not be made by a public officer. b) After the expiration of one (1) year following the date on which Principal ceased Work on said Contract, it being understood, however, that if any limitation embodied in this bond is prohibited by any law controlling the construction hereof such limitation shall be deemed to be amended so as to be equal to the minimum period of limitation permitted by such law. c) Other than in a state court of competent for the jurisdiction in and for the county or other political subdivision of the state in which the Project, or any part thereof, is situated, or in the United States District Court for the district in which the projector any part thereof is situated, and not elsewhere. 4. The amount of this bond shall be reduced by and to the extenfi of any payment or payments made in good faith hereunder, inclusive of the payment by Surety of mechanic's liens which may be filed of record against said improvements whether or not claim for the amount of such lien be presented under and against this bond. ELAM C fiISTRUCTIO INC. / incipal) (Seal) ~i (Title) Harold F. Elam, President WESTERN SURETY COMPANY (Surety) (Seal) (Title) omey-in-Fact CHERYL M. RUSTED, Attorney-in-Fact AUU)OCUMENT A311 PERFORMANCE 80ND AND LA80R AND MATERIAL PAYMENT BOND AIAo 4 ; ' FEBRUARY 1970 ED THE AMERICAN INSTITUTE OF ARCHITECTS, 7735 N.Y. AVE, N.W., WASHINGTON, D.C. 20008 - , • NOTICE In accordance with the Terrorism Risk Insurance Act of 2002, we are providing this disclosure notice for bonds and certain insurance policies on which one or more of the Writing Companies identified below is the surety or insurer. To principals on bonds and insureds on certain insurance policies written by any one or more of the following companies (collectively the "Writing Companies") as surety or insurer: Western Surety Company, Universal Surety of America, Surety Bonding Company of America, Continental Casualty Company, National Fire Insurance Company of Hartford, American Casualty Company of Reading, PA, The Firemen's Insurance Company of Newark, NJ, and The Continental Insurance Company. DISCLOSURE OF PREMIUM The premium attributable to coverage for terrorist acts certified under the Act was Zero Dollars ($0.00). DISCLOSURE OF FEDERAL PARTICIPATION IN PAYMENT OF TERRORISM LOSSES The United States will pay ninety percent (40%) of covered terrorism losses exceeding the applicable surety/insurer deductible. 1 1 1 1 1 1 ~ .~F,o 1 1 1 'stern Surety Cor~parnr 1 ~ POWER OF ATTORNEY APPOINTING INDIVIDUAL ATTORNEY-IN-FACT Know All Men 1By These Presents, That WESTERN SURETY COMPANY, a South.Dakota corporation, is a duly organized and existing corporation 1 having its principal office in dre City of Sioux Falls, and State of South Dakota, and that it does by virtue of the signature and seal herein affixed hereby make, constitute and appoint ' Darrell C R Olson, Darrell C R Olson II, Mark Sweigart, Cheryl M Hosted, Individoally 1 of Englewood, CO, its true and lawful Attomey(s~in-Fact with full power and authority hereby conferred to sign, seal and execute for and on its behalf 1 bands, undertakings and other obligatory inswmerrts of similar nature - In Unlimited Amoonts - ' and to bind it thereby as fully and to Ure same extern as if such instruments were signed by a duly authorized officer of the corporation and all the acts of said Attorney, Pursuant to the authority hereby given, are hereby rati5ed and cenfirmed. 1 This Power of Attorney is made and executed pursuant to and by authority of the By-I.aw printed on the reverse 6et~~ duly adopted, as indicebed, by the shareholders of the corporation. ' In witness Whereof, WESTERN SURETY COMPANY has caused these presets to be signed by its Senior Vice President and its corporate seal to be hereto affixed on this 6th day of May, 2003. 1 WESTERN SURETY COMPANY ~~ ~`7 +~~/j~rpp~~ PBUk . Brnflet, SenlOr Viee President State of South Dakota 1 J? ss 1 County of Minnehaha On this 6th day of May, 2003, before me personally came Paul T. Bndlat, to me known, who, being by me duly sworn, did depose and say: that he • resides in the City of Sioux Falls, State of Souffi Dakota; that he is the Senior Vice Presidem of WESTERN SURETY COMPANY described m and which ' executed the above instrument; that he knows the seal of said corporation; than the seal affixed to the said instrument is such corporate seal; that it was so affixed pursuant to authority given by the Board of Directors of said corporation and that he signed his name thereto pursuant to like authority, and acknowledges same to be the act and deed of said corporation. 1 My commisslOrl expires ~bbbbbbbbbbbbbbbbbbbbbbbb ~ f D. KRELL • ' November 30, 2006 • NOTARY PUBLIC + i~SOUTIi DAICfrfA~i •bbbb44bbbbbbbbbbbbbbbbb ~ D. I{rell, N Public CERTIFICATE I, L. Nelson, Assistant Secretary of WESTERN SURETY COMPANY do hereby certify that the Power of Attorney hereinabove set forth is stilt in force, and further certify that the By-Law of the corporation printed on the reverse hereof is still in force. Ia testimony whereof I have hereunto subscribed my name and affixed the seal of the said corporation this 8TH - day, of AIIGOST 2003 ' Form F4280-O1-02 ~~~'~ ~V6'ESTERN SURETY COMPANY ~S4o"°o~,° - ~- ~,~~~. _ _. - L. Nelson, Assistant Secretary ~ • • ' GENERAL CONSTRUCTION REQUIREMENTS & SPECIFICATIONS ' GENERAL CONSTRUCTION REQUIREMENTS ' 1. Contractor shall attend aPre-construction Conference as required by the General Conditions. Representatives of the Owner and Engineer will also be in attendance. Contractor shall not begin. construction activities prior to the Pre-construction ' Conference. 2. Construction safety is the sole responsibility of Contractor. Neither Engineer nor Owner ' will be responsible for monitoring or assuring Contractor's compliance with any applicable safety laws, programs, regulations, or policies. ' 3. Contractor shall obtain at his expense all permits and inspections required by any agency with jurisdiction over any portion of the work, which are necessary to perform the work. 4. Contractor shall construct and maintain construction entrances to the work in locations acceptable to Owner and Engineer. Construction entrances shall function to minimise off-site soil tracking. All soil tracked off-site shall be immediately cleaned up to the satisfaction of the Owner. 5. Contractor shall maintain existing drainage channels, culverts, and appurtenances during construction as necessary to protect roads and property. 6. Contractor shall limit all construction activities, including equipment and material ' storage, to within the Construction limits shown on the Drawings. Additional areas required by Contractor for storage, staging, or any other function shall be obtained by Contractor with no additional cost to Owner. 7. Contractor shall not scale Drawings for construction purposes. Missing dimensions or discrepancies in the Drawings detected by Contractor shall be brought to the attention of ' Engineer immediately. Assumptions made by Contractor with regard to missing dimensions or discrepancies in the Drawings are at Contractor's own risk. ' 8. Conflicts with existing underground utilities may exist. Prior to commencement of construction in any area, Contractor shall make arrangements for accurate location, including bury depth, of all existing utilities within the Construction Limits at his own expense. Where conflicts exist between necessary construction activities and existing utilities in the opinion of Contractor, Engineer, and the respective utility owner, affected ' utilities will be relocated by the utility owner. 9. ~ Contractor is responsible for protection of all existing utilities. Any existing utility ' damaged as a result of Contractor's activities shall be repaired by Contractor with no additional cost to Owner. General Construction Requirements & Specifications Page. l ~ ~ • 10. Where existing surface features related to existing underground utilities are to be adjusted to final grades, including valve boxes, manhole frames, lids and grates, sanitary sewer ' cleanouts, and storm drain inlets, Contractor shall make such adjustments to the satisfaction of the respective utility owner and at Contractor's expense. 11. Owner and Engineer assume no responsibility for utility locations. Locations shown may not be adequate for the purposes of construction. Contractor is responsible for verification and accurate location of all existing utilities. 12. Contractor will provide construction staking as follows: ' a. Location and grade stakes for storm drainage improvements b. Location and grade stakes for trail alignment at 75 foot intervals and including ' trail retaining walls. Trail alignment staking will include reference stakes outside of the construction limits to the extent practical. ' c. Contractor must reestablish, at his own cost, staking lost within the construction limits due to his construction activities. ' 13. All excavations for utility lines, culverts, trenches, or tunnels shall meet the requirements of the Occupational Safety and Health Administration (OSHA), Colorado Industrial Commission, Colorado Division of Mines, or Colorado Department of Transportation ' (CDOT), whichever applies. 14. If any groundwater is encountered, Contractor shall immediately inform Owner. ' 15. Contractor shall take all appropriate precautions to significantly reduce any potential pollution caused by his activities, including vehicle fueling, storage of fertilizers or ' chemicals, etc. contractor shall have defined procedures for handling potential pollutants and have identified spill prevention and response procedures prior to any activities on the ' project site. 16. Contractor shall maintain dust control throughout the construction period by application of water and/or an acceptable dust palliative. ' 17. Contractor shall have one 1 si ed co of the final construction Tans and one 1 co O gn PY P O PY ' of the appropriate specifications on the job site at all times. The contractor shall have one complete set of the contract documents on the job site at all times. 18. Contractor shall coordinate all work in such a manner that traffic disruptions on all affected roads are minimized and adequate safety precautions have been taken to ensure public safety. General Construction Requirements & Specifications Page 2 i ~ 1 ' SPECIFICATIONS ' 1. Reference Standards: All construction and materials shall conform to applicable State standards and specifications. Work within Colorado Department of Transportation (CDOT) right-of--way will be subject to construction observation by CDOT ' representatives. Contractor shall follow the applicable construction specifications set forth by CDOT in the latest manual of Standard Specifications for Road and Bridge Construction. 2. Traffic Control: Contractor shall identify traffic patterns related to construction and shall provide and maintain all lights, signs, barricades, flag men and other devices necessary to ' provide for public safety. Contractor shall submit a Traffic Control Plan to be approved by CDOT prior to commencement of construction. ' 3. Excavation and Embankment: All materials excavated as indicated on the typical section and as required to perform the Work will be considered Unclassified Excavation as defined in CDOT'S Standard Specifications for Road and Bridge Construction, Section ' 203.01. Excess and unsuitable excavated material, including rock and boulders, that cannot be used in embankments may be placed on designated side slopes as approved or hauled from the site at the Contractor's expense. Embankment material as indicated on the typical sections and as required to perform the Work shall consist of approved material acquired from excavations, hauled and placed in ' embankments, conforming with the requirements of CDOT Standard Specifications for Road and Bridge Construction, Section 203.03. Rock fill, as defined therein, will not be allowed in embankments. Compaction of embankments shall be in conformance with CDOT Standard Specifications for Road and Bridge Construction, Section 203.07. All back filling to be ' mechanically compacted in lifts ranging in thickness from four (4) to twelve (12) inches, said lifts being commensurate with the size and type of compaction equipment and back fill material being used. ~ For example, when a jumping jack is being used for compaction ' of C.D.O.H. C 1 6 aggregate base course, the lift should not exceed 4 inches. Suitable material for use in back filling within the trail prism of unimproved roadways, or ' new development roadways under construction at the sub-grade stage, is that excavated material which is free of organic material, frozen lumps or rocks in excess of eight (8) ' inches in diameter, provided however, that rock in excess of three (3) inches in diameter shall not be used within the last twelve (12) inches of backfill. Native materials may be used for back filling outside the trail pnsm. Variations to actual site conditions including depth and quantity of subsurface groundwater, unsuitable soil, etc. may require field revisions. ' 4. Culverts: Standard drainage culverts will be 18" diameter CMP except as otherwise specified on the plans by the Engineer. General Construction Requirements & Specifications Page 3 ~ ~ Culverts shall be Corrugated Steel Pipe conforming to CDOT Standard Specifications for ' Road and Bridge Construction, Section 707.02. Culverts shall be bedded in and back filled with Class 2 Structure Back-fill conforming to CDOT Standard Specifications for Road and Bridge Construction, Section 703.08(b) and installed in accordance with the ' construction requirements of CDOT Standard Specifications for Road and Bridge Construction, Section 603. ' Where the Drawings show required modifications to existing culverts, including culvert extensions or construction of manholes at an end of an existing culvert, such existing culverts shall be cleaned out of all sediment and debris by Contractor for the full length ' of the culvert. 5. Aaaregate Base Course ABC): Aggregate Base Course shall be Class 6 as defined in ' CDOT Standard Specifications for Road and Bridge Construction, Section 703.03 and shall conform to all other requirements of the section. Aggregate Base Course shall be installed to the lines and grades shown in the Drawings and conform to the construction requirements of CDOT Standard Specifications for Road and Bridge Construction, Section 304. ^ 6. Asphalt Concrete Paving: Asphalt Concrete Paving shall be an approved design consisting of Aggregate Grading CX as defined in CDOT Standard Specifications for ' Road and Bridge Construction, Section 703.04 and Asphalt Grade AC-10 conforming to the requirements of AASHTO M226 Table 2. Contractor shall submit a proposed job mix gradation which satisfies the Materials requirements of CDOT Standard Specifications for Road and Bridge Construction, Section 401. An emulsified asphalt tack coat shall be applied between lifts of asphalt concrete conforming to AASHTO M 140 or AASHTO M208. The Asphalt Mix Design Criteria shall conform to Marshall methodology as follows: DESIGN CRITERIA MARSHALL METHOD Coin action 35 blows er side Stabili 7501b. Min Flow 0.08-0.18 inches Percent air voids 3-5 Percent voids in mineral aggregate 15 min. For'/2 nominal @ 4.0% voids Percent voids filled 70-80 Tensile strength ratio, % retained 80 min. 7. Sterilant: Prior to placement of asphalt, an approved sterilant shall be applied to the compacted aggregate base course layer of the trail cross section. General Construction Requirements & Specifications Page 4 ' ~ ~ ' 8. Stripping Topsoil, Adding Topsoil, Seeding, Fertilizing;, and Mulching: Contractor shall remove and dispose of all excess and unsuitable material including topsoil and vegetation ' within the construction limits prior to grading the path. Topsoil shall be installed over all disturbed areas and according to the typical sections in the Drawings and shall include raking and removal of unsuitable rock and material. Salvaging, stockpiling, hauling, and placement of topsoil shall conform to the Construction and Material Requirements of CDOT Standard Specifications for Road and Bridge Construction, Section 207. All top-soiled areas shall be seeded, fertilized and mulched in accordance with CDOT ' Standard Specifications for Road and Bridge Construction, Sections 212 and 213. Contractor shall submit a proposed seed mix and application rate for approval. The trail platform shall be swept of construction and revegetation debris at partial and final completion. 9. Materials Sampling, Testing and Ins ep ction: Sampling, testing and inspection of ' materials by a qualified independent testing laboratory will be the responsibility of the Contractor. ' Sub-grade shall be proof rolled with a loaded tandem axle dump truck in the presence of the Engineer. Areas found to be weak or fail shall be ripped, scarified, wetted if necessary, and re-compacted to requirement for density and moisture at Contractor's ' expense. Inspection Notification: Contractor shall notify the Engineer for the purpose of arranging ' anon-site inspection no less than forty-eight (48) hours in advance of the following stages of trail construction: ' a) Sub-Grade: Prior to and during construction b) Aggregate Base Course: Prior to and during construction c) Asphalt Placement: Prior to and during construction d) Retaining Walls: Prior to and during construction e) Railings The Engineer shall make an on-site visit within forty-eight (48) hours notification period for the purpose of observing proof rolls on items a) and b) above and for general observation of construction methods being employed at these stages. Said on-site inspection by the Engineer shall in no way abrogate the duties of the Contractor outlined elsewhere in the plans. General Construction Requirements & Specifications Page 5 ~ ~ ' 10. COMPACTION ITEM TEST TYPE FREQUENCY RECOMMENDATIONS Path/Road 1. Density Test 1 per 2000 C.Y. of 95% Standard Proctor Embankme additional (ASTM D-698, AASHTO nts embankment T-99 Finished 1. Density Test 1 per 250. lineal ft. of 95% Standard Proctor Sub-Grade roadway (ASTM D-698, AASHTO T-99) Aggregate 1. In Place Density 1 per 250 Lineal Feet 95% Standard Proctor Base Course 2. Gradation 1 per 2000 tons ABC (ASTM C-698m, 3. Atterber Limits 1 er 2000 tons ABC AASHTO T-99 Hot 1. Asphalt Content 2 per day production 92% Maximum Theoretical Bituminous 2. Gradation 2 per day production Density Pavement 3. In Place Density 2 er da roduction Signnag_e,: Contractor shall provide posts, dry cement, and sign hardware. Contractor shall install signs and posts in the locations designated on the Plans. ' 11. Match to Existing_ Trail: Contractor shall do all cutting, fitting, and patching of his/her work that may be required to make its several parts come together properly and integrate with such other work. Contractor shall not endanger any work of others by cutting, ' excavating, or otherwise altering their work, and will only cut or alter their work with the written consent of Engineer and the others whose work will be affected. ' RETAINING WALL CDOT Standard Specifications for Road and Bridge Construction, Section 504 is hereby revised for this project to include the following: ' Description This work consists of constructing a concrete block facing Mechanically Stabilized Earth (MSE) Retauung Wall System at the locations and to the lines and grades shown on the plans. The MSE wall system constructed on this project shall be: Apre-approved alternative MSE Wall System. Pre-approved alternative shall mean the systems described below which have been reviewed and approved by Colorado Department of Transportation as to concept. The Contractor however, shall be responsible for adapting the design and construction of the alternative wall system to the site condition, except for the global stability and long-term foundation settlement. The alternative wall system shall be designed and constructed in accordance with these specifications and to the lines and grades of the Contract. General Construction Requirements & Specifications Page 6 Only the following alternative MSE Wall System is pre-approved for use on this project: Venture/Strata (geogrid supplier's #303-254-8846) Material Shop Drawings: The Contractor shall submit shop drawings for review and approval prior to beginning of MSE Wall construction. Shop drawings shall be submitted in accordance with CDOT Standard Specifications for Road and Bridge Construction, Section 105.02. For pre-approved alternative MSE Wall System designs, the Contractor shall submit six sets of design calculations for review with the shop drawing submittal. The design and details of the MSE wall system shall be prepared and sealed by a Professional Engineer registered in the State of Colorado. The shop drawings shall provide the details necessary to demonstrate compliance with the requirements in the plans and these specifications, including: a. With close conformity to line and grades shown on the plans the wall layout including the leveling pad elevations, leveling pad step breaks, total numbers of blocks and associated blocks elevations including the top of block elevations. For walls with rail anchoring slab, top of block elevations shall be within 50 mm (2") of bottom of the anchoring slab or as designated in the plans. b. The details of the MSE Wall facing blocks and attachments to the soil reinforcement. The facial blocks shall be connected to each layer of soil reinforcement, unless shown otherwise on the plans. Sequence, or limit, if applicable, of facing unit placement shall also be shown. c. The soil reinforcement types, spacing, lengths, elevations, and the corresponding wall design height segments shall be shown on the wall layout. Soil reinforcement lengths shall be measured from the front face of the concrete block facing to the end of the reinforcements and shall not be less than any lengths or length requirements given on the plans. Elevations of each layer of reinforcement are not required when there is a layer with each course of blocks. d. For geosynthetic reinforcement, the required reinforcement Long Term Design Strength (LTDS) and the supplied LTDS (determined in accordance with Subsection 8 under Design Requirements, of this specification) with corresponding brand and grade of material shall be listed side by side. The LTDS of the supplied reinforcement grade must meet or exceed the required LTDS corresponding with the reinforcement spacing provided. The Contractor shall provide Minimum Average Roll Value (MARV) certification which states the MARV of the supplied material has been determined in accordance with ASTM D-4595. General Construction Requirements & Specifications Page 7 • e. The top leveling pad and associated reinforcement elevations given in the plans, which are based on nominal block height, shall be modified by the shop drawings taking into account actual block height, variation in block height, and the interposing layers of reinforcements. 2. Reinforced Backfill: The backfill material for the "Reinforced Soil Zone" shall conform to the following requirements: SIEVE SIZE PERCENT PASSING 2" 100 1" 75-100 3/a" 65-100 No. 4 0-60 No. 40 0-50 No. 200 0-20 3. Retained Backfill: The backfill material for the "Retained Backfill Zone" shall be material meeting the requirements of ASTM D2487 soil classification groups GW, GM, SW, or SM; free of rock or gravel larger than 4 inches in any dimension. 4. Leveling Pad. The leveling pad shall be constructed of granular soil meeting the following gradation: SIEVE SIZE PERCENT PASSING 3/a" 100 No. 4 30-65 No. 8 25-55 No. 200 3-12 5. Unit Fill. The fill material placed inside the block units shall consist of a well graded clean 1 inch minus crushed stone or granular fill meeting the following gradation: SIEVE SIZE PERCENT PASSING 1" 100 3/4" 50-90 No. 4 0-60 No. 40 0-50 No. 100 0-5 No. 200 0-2 General Construction Requirements & Specifications Page 8 ~ • • 6. Impervious Membrane: The impervious membrane shall conform to the requirements of CDOT Standard Specifications for Road and Bridge Construction, Section 712.08 for ' Geomembrane, and shall be minimum 0.76 mm (30 mil) in thickness. either with dual track field seamed PVC liner or with a 200mm (8") minimum width lap and fold waterproof connection. ' 7. Concrete Block Facing Unit: The concrete block shall conform to the requirements in the plans and these specifications including the color, texture, and pattern. The Contractor 1 shall provide certification that the tests indicated in this subsection meet the requirements of the appropriate specification. ' a. Components: The cementitious materials shall be Portland cement which shall conform to the requirements of ASTM C 150. Fly ash may be used but shall not exceed 20% by weight of the total cement content and shall conform to the ' requirements of ASTM C 618. Aggregates used in the manufacture of the units shall conform to the requirements of ASTM C 33 for normal weight concrete aggregate. b. Block/Reinforcement Connection Test. The block to block and block to reinforcement connection test shall conform to the requirements of NCMA Methods SRWU-1 and SRWU-2. The service state connection strength shall be determined with the 19 mm (.75") performance limit. c. Physical Requirements. At the time of delivery to the work site, the units shall conform to the following physical requirements. ' (1) Either a full block or saw cut coupon compressive test is acceptable to verify the 28 day concrete strength. The location of cut for the coupon shall be approved by the ENGINEER. (2) The average compressive strength of three tests shall be equal or greater than 32 MPa (4500 psi) with the minimum of 28 MPa (4000 psi) for individual test in accordance with ASTM C 90. (3) The minimum oven dry weight of concrete block shall be 2000 Kg/M3 (125 pcf) with a maximum water absorption rate by weight of 6 percent determined in accordance with the requirement of ASTM C 140. 4 The Contractor shall rovide certified test re orts of item (2) and (3) () P P above from independent test labs. d. Finish and A earance: All units shall be in ood condition. Cracks, chi s PP g P ' and/or other imperfections may be cause for rejection, as determined by the ENGINEER. General Construction Requirements & Specifications Page 9 ~ ~ ' Architectural treatment or graffiti resistance treatment shall meet the requirements shown on the plans. If architectural and graffiti treatment is required by the plans, prior to beginning wall construction the ENGINEER shall be provided with four sample blocks for each different color and texture. The permissible variations in the exterior dimensions of the concrete block shall not differ more than f3 mm ('/s"), except the height of the block shall be within f1.5 mm (1/16") from the specified dimensions for an individual block. The minimum thickness of any walls or webs within the block shall be on average 76 mm (3") at the face and 50 mm (2") at the stem and back. The vertical edges, if applicable, shall be chamfered for splitting and precise dimensioning. e. Sampling and Testing: The ENGINEER shall be allowed access to the manufacturers facilities to inspect and sample units from lots ready for delivery to the project. f. The ENGINEER reserves the right to reject any concrete blocks which do not meet the requirements of these specifications. The Contractor shall notify the ENGINEER in writing at least 72 hours before beginning the casting of any blocks for this project. Design Requirements ' 1. Wall Designs: The design shall provide for soil retention to the lines and grades shown on the plans. It shall conform to the requirements of the latest AASHTO Standard Specifications for Highway Bridges, Division I, Section 5, the plans and these ' specifications. 2. Design Height: Unless otherwise defined on the plans, the wall design height shall be measured vertically from the top of the leveling pad to the top of concrete rail anchoring slab for wall with rail, or to the top of concrete block for wall without rail. For tiered walls placed with a setback within a horizontal distance (wall face to wall face) of more than 0.5 and less than 1.3 times the design height of underlying wall, the upper wall shall be treated as surcharge to the lower wall. The design height shall be determined independently for each wall. For tiered walls placed within a horizontal distance equal to or less than 0.5 times the design height of the underlying wall, the upper and lower wall shall be treated as a single wall with the design height measured from the top of the leveling pad of the lower wall to top of concrete block, or anchoring slab, as applicable, of the upper wall. For tiered walls placed outside the 1.3 times the design height of the underlying wall, ' both the upper and lower wall shall be designed as separate independent walls and the design heights determined accordingly. General Construction Requirements & Specifications Page 10 C~ • • 3. Soil Reinforcement Length: The soil reinforcement length shall be measured from the front face of the concrete block face to end of reinforcement. Soil reinforcement lengths shall not be less than any lengths or length requirements given in the plans. Unless otherwise required on the plans the length of soil reinforcement shall be equal from top to bottom at all layers of wall. Unless otherwise required on the plans, the minimum soil reinforcement length shall be as follows: DESIGN HEIGHT (DH) MINIMUM REINFORCEMENT LENGTH DH >3,35 M (11') 0.7(DH) 3.35 M 11' >_ DH >_ 2.43 M (8' 2.43 M 8' DH <_ 2.43 M (8') 1.0(DH) To La er >_ 2.43 M (8') 4. Pullout and Block Connection Strength: The factor of safety for pullout resistance shall be greater than or equal to 1.5. Reinforcement connections to the facing block shall be designed (and tested per subsection 7.b under Materials of this specification) to carry 100% of the corresponding required LTDS at all reinforced levels. 5. Backfill: The backfill for the Reinforced Soil Zone shall be considered non-aggressive for corrosion and durability. The friction angle, phi, shall be a value appropriate for the fill material used. The ENGINEER may require chemical and organic content tests if the source is questionable. All reinforcing elements shall be designed to ensure a minimum design life of 75 years for permanent structures. 6. Impervious membrane: For all roadway supporting walls an impervious membrane shall be installed at the top of the reinforced zone to intercept surface runoff and salt penetration. This membrane shall have a minimum coverage length measured perpendicular to the wall face at least equal to the wall design height plus 1 meter (3'4"). The membrane shall be provided with a perforated slotted PVC or corrugated HDPE drainage collection pipe, with a geotextile sock filter, and shall extend either to the drainage system or drain out of the wall at every 30 meters (100') along wall alignment. The membrane shall slope 20 maximum (H) to 1 (V) towards the drainage pipe. 7. Extensible Soil Reinforcement: Extensible soil reinforcement shall be a geogrid or geotextile. For polyester (PET), polypropylene (PP) and high density polyethylene (HDPE) reinforcement the LTDS of material shall be determined using the following factors of safety to ensure the required design life. Unless otherwise noted, the LTDS may not exceed the following K percent of its ultimate tensile strength, MARV, i.e. LTDS = K'~ MARV, where K =CRC/(1.78*FC*FD) Products pre-approved for this project: Miragrid K =15.7% with CRC = 0.46, FD =1.5, FC = 1.1 Strata K =13.6% with CRC = 0.40, FD =1.5, FC =1.1 General Construction Requirements & Specifications Page 11 • Tensar K =17.0% with CRC = 0.37, FD =1.1, FC = 1.1 8. Stability Calculations: Calculations shall include analysis for the internal and external stability of the wall. The alternative wall designer shall be responsible for the following external stability calculations: a. Sliding (FS >_ 1.5) b. Overturning (FS >_ 2.0) i c. Loss of heel (eccentricity <_ L/6) d. Bearing (as specified on the plans) 9. Soil Reinforcement Spacing: a. The first (bottom) layer of soil reinforcement shall be no further than 400 mm (16") average above the top of the leveling pad. b. The last (top) layer of soil reinforcement shall be no further than 500 mm (20") average below the top of the uppermost concrete block. c. The maximum vertical spacing between layers of adjacent soil reinforcement shall ' not exceed 810 mm (32") and 1.8 times the width of block (measured from front to back) for block width > 300 mm (12"), nor 600 mm (24") for block width <_ 300 mm (12"). ' Construction Requirements 1. Excavation and Backfill: Should the excavation for the placement of the leveling pad expose an unsatisfactory bearing material the ENGINEER may require removal and replacement of that material. The removed material shall be replaced with material meeting the requirements of Reinforced Backfill compacted in conformity to CDOT Standard Specifications for Road and Bridge Construction, Section 206.03 except that the density shall be 100 percent AASHTO T-180. Payment for removal and replacement shall be in accordance with the Standard Specifications. The Reinforced Soil Zone shall be filled with material meeting the requirements of Reinforced Backfill and shall be compacted in conformity to CDOT Standard Specifications for Road and Bridge Construction, Section 206.03. The upper triangular fill portion immediately behind the Reinforced Backfill, Retained Backfill Zone, shall be filled with material meeting the Retained Backfill requirements and shall be compacted in conformity to CDOT Standard Specifications for Road and Bridge Construction, Section 206.03. Unless otherwise noted on the plans, recycled asphalt and flow-fill material is t not allowed to substitute Reinforced Backfill, or Retained Backfill. Each layer of Backfill shall not exceed 200 mm (8") before compacting to the required density and before ' successive layers are placed. At least 150 mm (6") of material shall be in place prior to operation of tracked vehicles over the reinforcements. Only hand operated compaction equipment shall be allowed within 900 mm (3') of the front of the- wall face and General Construction Requirements & Specifications Page 12 ~ • • compaction in these areas shall conform to CDOT Standard Specifications for Road and Bridge Construction, Section 206.03. The fill and compaction operation shall progress from the face toward the back. The verification of 95% AASHTO T-180 compaction is absolutely required behind the blocks, for a distance equal to reinforcement vertical spacing, unless pea gravel is used to fill the top triangular portion above the structure backfill spill zone. ,,~ The Contractor shall place additional blocks and fill material, properly compacted, to return the finished grade to plan elevations if settlement as determined by the ENGINEER has occurred. A final inspection before the installation of rail anchoring slab, if applicable, shall be made 30 to 45 days after the completion of the top layer of blocks. Payment shall conform with the Standard Specifications. ' If the settlement is determined to be the result of the non-conforming backfill or backfill not meeting compaction requirements, the Contractor shall bring the elevation to the finished grade at no extra cost to the project. 2. Reinforcement: The reinforcement shall be laid to within 25 mm (1 ") from the front face of block. -For Geosynthetic sheet reinforcement there shall be a minimum of 150 mm (6") overlapping between rolls. 3. Leveling Pad: The leveling pad shall be placed and compacted to within '/a" of the plan elevation and shall be level to within '/4" in 10 feet. A fmal layer of washed sand maybe used to achieve a level surface meeting the specified tolerance. Maximum thickness of sand layer shall be 1 inch. 4. Block Facing: An overall negative batter (wall face leaning outward) between bottom and top of wall is not allowed. The final wall face shall be vertical, or have a positive batter of 3% maximum. The surface of wall face shall be tested with a 3 m (10') straightedge laid along the surface in all directions. Except as necessary for horizontal alignment of the wall, convex deviation of the wall face from the straightedge (belly wall) shall not be allowed, and concave deviation from the straightedge shall be less than 12 mm ('/2"). Wall with overall negative batter or convex surface shall be corrected as early as possible to avoid price reduction and rejection. Unless otherwise noted, all blocks shall be dry stacked and placed with each block spanning the joint in the row below (running bond). For walls without a rail anchoring slab, the top two courses, or a cast-in-place reinforced concrete cap course and the course directly below it, shall be pinned and internally grouted together with a minimum of two #lOM (#4) bars per block. For walls with rail anchoring slabs, top of block elevations shall be within 50 mm (2") of 1 the bottom of the anchoring slab or as designated in the plans. Cast-in-place concrete or sawcut partial height blocks may be used to accomplish this without extra cost to the project. General Construction Requirements & Specifications Page 13 • • 1 5. Manufacturer's Representative: For alternative wall construction the Contractor shall arrange for a technical representative from the wall system supplier to be present during the construction of the MSE walls. The representative shall provide all necessary instructions and guidelines to construct the walls in accordance with these specifications and the manufacturer's requirements. The alternative wall supplier's technical representative shall certify in writing that the wall has been constructed in accordance with the Manufacturer's product specific requirements. Payment will be full compensation for designated materials and labor including Structure Excavation, Backfill, concrete block facing, leveling pad, geogrid, removal of portions of existing MSE wall, and all miscellaneous items necessary to construct concrete block facing M5E walls. Structure excavation and Backfill for replacement of potential subgrade soils shall be paid for separately. Payment Reduction: A dislocated block is an individual block located outward more than 3mm ('/8") or placed with a vertical joint more than 6mm ('/4" from the adjacent blocks. A cracked block is an individual block with a through crack with a width of more than 3mm ('/8"). A corner knock-off is a block with any missing facial comers. Substandard blocks are concrete blocks installed in any wall segments that do not meet the certified values under Section 7.c.(3) of Materials for compression strength and water absorption rate. In the completed wall, or completed portion of the wall if, the number of defective blocks (cracked blocks, corner knock- off blocks, dislocated blocks, substandard blocks), blocks associated with negative batter in Section 4. of the Construction Requirements, and blocks failing the straightedge test exceeds 3% of the total number of blocks in a 6 meter (20') horizontal length of wall, a 3% price reduction will be applied for that 6 meter (20' portion of wall for each one percent of defective blocks exceeding 3% to a maximum reduction of 21%. The overall percentage calculated from the sum of all defective blocks to the total blocks shall be calculated and serve as the base for the payment reduction. Each one of the first three pay items listed above shall receive this same percent of payment reduction. When the number of defective blocks and/or dislocated blocks as defined above exceeds 10% of the total, the ENGINEER shall reject the wall or portions thereof. General Construction Requirements & Specifications Page 14