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Home My WebLink About851464.tiff 0 0 RESOLUTION RE: APPROVE CHANGE ORDER FOR LANDMARK ENGINEERING, LTD. CONCERNING WELD COUNTY BRIDGE 45/58hB WHEREAS, the Board of County Commissioners of Weld County, Colorado, pursuant to Colorado statute and the Weld County Home Rule Charter, is vested with the authority of administering the affairs of Weld County, Colorado, and WHEREAS, on March 13 , 1985 , Weld County, Colorado, entered into an Agreement with Landmark Engineering, Ltd. for the design and construction of Weld County Bridge No. 45/58'B, and WHEREAS, it has come to the Board's attention that, due to an error in the report submitted by the Army Corps of Engineers, additional work is now required, and WHEREAS, the Board deems it advisable to approve a change order for Landmark Engineering, Ltd. , said change order not to exceed the amount of $3,500 , with the other terms and conditions to be as stated in the original Agreement. NOW, THEREFORE, BE IT RESOLVED by the Board of County Commissioners of Weld County, Colorado, that a change order for Landmark Engineering, Ltd. , not to exceed the amount of $3,500 , be, and hereby is, approved with the other terms and conditions to remain as stated in the original Agreement. The above and foregoing Resolution was, on motion duly made and seconded, adopted by the following vote on the 9th day of September,\te A.D. ,, 1985. `7 •ATTEST: %M el (�,w,.tt44 BOARD OF COUNTY COMMISSIONERS WELD COUNTY, COLORADO Weld County Clerk and Recorder and Clerk to the Boa J ine J son, C airman B ice/ 4 LR. BS, Pro-Tem D puty County er APPROVED AS TO FORM: C.W. K G• .':jr Lac oun y Attorne Fran Yam;,- chi �8 ©©/ex 851464 Landmark ENGINEERING LTD. August 22, 1985 Project No. 1595-DB4L-13-457 Mr. Drew Scheltinga County Engineer Weld County P.O. Box 758 Greeley, CO 80632 RE: Weld County Bridge No. 45/58-1/2B Dear Drew: In response to your letter of August 19, 1985, we have made note of comments which are to be incorporated into the construction drawings and specifications. We will address herein the other items to which you referred. The soils report which was submitted to you does refer to a Table 1 showing laboratory test results. This table was erroneously omitted from the report. Three copies of it are attached for inclusion in your copies of said report. In your discussion on the river hydraulics you referred to the work performed by Dennis Messner, our staff hydrologist, and his results which disagreed with the study prepared by the Corps of Engineers. It should be noted that the channel cross-section data available to us at that time was limited, so we consider Mr. Messner' s results inconclusive at this time. We agree that if there are conflicting stories regarding the hydraulics of the various flows in the Cache La Poudre, further hydraulic study would be a wise undertaking. With this goal in mind, I propose the following Scope of Work: 1. Survey five (5) cross-sections of the channel at 300 ft. , 1,500 ft. and 2,500 ft. upstream of Fern Avenue, 800 ft. downstream of Fern Avenue, and along the centerline of Fern Avenue. 2. Plot cross-sections from survey notes. 3. Perform a HEC-2 computer backwater profile using the existing timber bridge for 3000, 6000, and 9950 CFS flows. Main Office 2300 West Eisenhower Blvd. Loveland, Colorado 80537 Branch Office 2235 2nd Avenue Dale D. Olhausen,P.E.&L.S. Greeley, Colorado 80631 • ENGINEERS/ARCHITECTS/PLANNERS/SURVEYORS Loveland(303) 667-6286 • Greeley(303) 356-6286 • Fort Collins(303) 221-5550 • Denver (303)629-7124 Mr. Drew Scheltinga Project No. 1595-DB4L-13-457 August 22, 1985 Page 2 4. Perform a HEC-2 computer backwater profile using the proposed replacement bridge for 3000, 6000, and 9950 CFS flows, with a one-foot freeboard to bottom of bridge for the 9950 CFS flow (100-year flood) . 5. Prepare a letter-type report summarizing the findings in Items 3 and 4 and giving our recommendations for the proposed bridge. 6. Discussion of results with County Engineer. Our estimate of costs for this work is $3,500.00. The estimated time for completion is two (2) weeks after our receipt of a Notice to Proceed from your office. Prior to your Notice to Proceed, arrangements will be needed with the property owners adjacent to the bridge for our surveyors to have temporary access. Our cross-sections survey will definitely be conducted on their properties. Attached, for your information is our 8-1/2 x 11 portion of the Corps flood study showing the location of the proposed cross- sections. As we have indicated in our Scope of Work, the results of the hydraulic study and our recommendations will be dis- cussed with you upon your review of our report. At that time it can be determined if and how the results of the study influences the design of the bridge, which has been substantially completed by our firm. If you need further information regarding the proposed hydraulic study, please give me a call. Sincerely, LANDMARK ENGINEERIG LT . 77:"1"7 Paul M. Wright, .E. PMW/er Enclosure cc: David Shupe a _. f �' Y .yT• ' ^ z.•}. r,--.....-, , jc�._- '.1, �i Jdsl� `R y •••:-,,,, _..,,,, ____. _____ _ : „....,,,..3-- rte` r y T� zf' ` 3r. t\Scall .1 •IN+ Y 4 ? �,1 `� i �vr o_ °emu. ---•$. J `��'1�f,• In, I s Ter Jr -.14.1,.....- g ...".•-, ly i�r� K .V' .f f -. *_�-7 L' ...I .k-'f ri r He, '. �. ^\•,�rL x �'� ,�� -� 1 _�, • ice �3 *G �. r . � ..1 ♦ t x � yy „Its . M i. • ttt? ' - 4 ��' t I4r t Y ,p, r t ,. 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