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Home My WebLink About20141013 Ver 1_Finding of Adverse Effect Bridge 33 Ahoskie Creek - SHPO_20141024 FOAE INDING FDVERSE FFECT D OCUMENTATION FOR REPLACE HERTFORD COUNTY BRIDGE NUMBER 33 ON NC 42 OVER AHOSKIE CREEK AHOSKIE, NC WBS NO. 17BP.1.R.58 NCDOT Historic Architecture The Prepared By: Human Environment Section Megan Privett 1598 Mail Service Center H ISTORIC Raleigh, NC 27699-1598 T (919) 707-6061 A T 919-707-6000 RCHITECTURE mnprivett@ncdot.gov Group www.ncdot.org March 2014 Hertford County Bridge Number 33 Project Undertaking Affected Historic Properties Proposed Mitigation Measures 1.Brief Description of the Undertaking The North Carolina Department of Transportation (NCDOT) proposes to replace Bridge No. 33 NC 42 over Ahoskie Creek in Hertford County, North Carolina, located in the northeastern portion of the state and west of the Chowan River. Bridge No. 33 was built in 1956 and is anine-span, prestressed concrete channel beam bridge with a length of 200 feet and a width of 31.6 feet. The bridge’s concrete deck is supported on timber pile and concrete cap beam bents with concrete backwalls at the ends. The bridge railfeatures a standard concrete one-bar cantilevered off of brush curb railings. The substructure of Bridge No. 33 is deteriorating, and the timber piles and cross bracing catch debris during storm events that put additional stress on the piles. NCDOT Bridge Management Unit records indicate Bridge No. 33 has a sufficiency rating of 56.6 out of a possible 100 for a new structure. The bridge is considered functionally obsolete due to the deck width of 28.2 feet. It currently carries 8400 vehicles per day and is expected to increase as the area develops. The estimated remaining life of the bridge is 5-11 years. The project proposes to replace Bridge No. 33 with a 210 by 52 feet cored slab concrete bridge on the existing alignment. The project utilizes state funds and also requires a Federal permit from the United States Army Corps of Engineers (USACE), the Division of Water Quality, and a CAMA permit. The Project Vicinity Map on the following page shows the location of this project in Hertford County. The proposed project will adversely affect Bridge No. 33, a prestressed concrete channel beam bridgethat is determined eligible for listing in the National Register of Historic Places. P ROJECT VICINITY MAP Hertford County Bridge No. 33 on NC 42 2.Description of the Efforts to Identify Historic Properties Historic Architecture and Historic Landscapes NCDOT contracted with Lichtenstein Consulting Engineers, Inc. to conduct a statewide historic bridge inventory of North Carolina’s pre-1961 bridges on the state highway system to determine which bridges met the National Register criteria for evaluation. Published in 2005, the inventory listed Herford County Bridge No. 33 as eligible for the National Register of Historic Places. No other National Register listed or eligible properties were identified in the project area during a recent survey of the Area of Potential Effects (APE). A consultation meeting was held between the North Carolina State Historic Preservation Office (NC HPO) and NCDOT onFebruary 18, 2014to identify and assess any effects as a result of the proposed replacement of Bridge No. 33. Archaeological Resources The archaeological review screening for this project was completed in September of 2013.No previously identified archaeological resources were found to be located within the APE. It should be noted, however, that there are numerous archaeological sites identified on upland ridge toes and ridge slopes overlooking Ahoskie Creek and its tributaries in the general vicinity. Nevertheless, the project as currently proposed appears to be unlikely to impact any intact or significant archaeological deposits. No further archaeological investigation of the APE was recommended. On September 24, 2013, the Archaeology Unit concluded that no archaeological survey is required for this project. 3.Description of the Affected Historic Property Hertford County Bridge Number 33 HertfordCounty BridgeNo. 33 is a nine-span, prestressedconcrete channel beam bridge with a length of 200 feet and a width of 31.6 feet. The bridge’s concrete deck is supported on timber pile and concrete cap beam bents with concrete backwalls at the ends. Built in 1956,the bridge’s construction features acombination of prestressed concrete channel beam and cast-in-place reinforced concrete slab.The bridge rail is composed of a standard concrete one-bar cantilevered off of brush curb railings. Hertford Bridge No. 33 is one of the oldest extant applications of prestressed concrete in North Carolina.Although prestressed concrete was utilized in Europe during the early twentieth century, the material did not make its way to the United States until around World War II. The state bridge unit introduced prestressed concrete, an economical and strong material, to effectively and quickly erect durable and cost-effective bridges in the 1950s. Two prestressed concrete channel beam designs were adopted by North Carolina’s bridge unit in 1956, one being thedesignrepresented by Hertford Bridge No. 33, which, is possibly unique to North Carolina. It combines prestressed concrete channels with a cast-in-place reinforced concrete slab deck and fill between the legs of the channels. Hertford Bridge No. 33is eligible for the National Register of Historic Places under Criterion C for engineering. Prestressed concrete is internally stressed in compression, often by high-strength steel wires of cables to counterbalance the stresses from bending caused by loads. This in turn helps to better prevent cracks in the concrete from flexing. The NCDOT Historic Bridge Inventory Report statesof the historic significance of Bridge No. 33,“…The adoption of prestressedconcrete marked one of the most important transitions in bridge building th during the 20century, and the early applications of prestressed concrete from the mid- 1950s, such as this bridge, are technologically significant mileposts in this transition, showing early thinking about, and uses of, the material.” NC HPO partnered withNCDOT’s statewide Historic Bridge Inventory and concurred with the eligibility determination made in 2005. No significant changes have occurred in the nine years since this determination, and the bridge remains intact and eligible. Hertford Bridge No. 33, Northwest Oblique Hertford Bridge No. 33, facing south Hertford Bridge No. 33, detail of timber pile substructure, facing south Hertford Bridge No. 33, detail of channel beam and timber pile substructure, facing southwest Ahoskie Creek, facing southeast from Hertford Bridge No. 33 Hertford Bridge No. 33, detail of vertical support and railing, facing northwest HertfordBridge No. 33, facing northeast Hertford Bridge No. 33, detail of substructure, facing northeast Hertford Bridge No. 33, facing north Hertford Bridge No. 33, facing northwest Hertford Bridge No. 33, facing southeast 4.Description of the Undertaking’s Effects on the Historic Property Bridge No. 450033 was built in 1956 and has prestressed concrete channels and caps with wood piles. This bridge currently carries 8400 vehicles per day and is expected to increase as this area develops. The bridge is not currently posted for any type vehicle. The substructure of this bridge has experienced deterioration to the piles and cross bracing. Several piles have been encased with concrete to help maintain the no posting limit on the bridge. The current structure catches debris during storm events putting additional stresses (forces) on the piles. The prestressed concrete channels are requiring consistent maintenance. The deck, superstructure and substructure are all rated 5 out of possible 9. NCDOT has determined that the replacement of Bridge No. 33 is the preferred option for restoring traffic safely on NC 42 over Ahoskie Creek. It was determined on February 18, 2014that the Preferred Alternative would result in an adverse effect to the historic property because the historic Hertford Bridge No. 33 will be demolished. 5.Description of Proposed Mitigation Measures or Alternatives Considered Preferred Alternative Replacement The new 210 feet three span bridge will result in better vertical and horizontal alignment with a new deck width of 52 feet of clear roadway to allow for two lane traffic along with a turn lane. Traffic safety would increase substantially which makes thisthe preferred option. The replacement plans would provide for a better transition with the current curb and gutter project plans adjacent to the bridge. Additionally, the extra width of the new bridge will provide safer passage for pedestrians crossing the bridge. The new bridge will also have fewer bents across the canal which will help prevent debris from accumulating around the bridge piles that could potentially risk failure of the structure. This alternative better serves the long term goals of the County of Hertford and Town of Ahoskie. Alternatives Eliminated from Further Study Do Nothing This is not a practical alternative due to the traffic that NC 42 carries. Alternative 1 would lead to lower bridge postings that would potentially prevent school buses and emergency response vehicles from crossing. Ultimately the bridge would be closed to service. Rehabilitation and Continued Maintenance Two of the three major components of the bridge need rehabilitation: Superstructure and substructure (piles). The bridge is not a good candidate for rehabilitation due to the type of material used for the substructure, specifically the wood piles. The piles are in poor shape and several have been encased with concrete to help preserve the structure; however, NCDOTclassifies pile jackets as only temporary repairs. To replace the piles would require removing the deck, superstructure and substructure. This essentially would be a bridge replacement. Potential Mitigation The mitigation measures proposed consist of photodocumentation and recordation of the historic Hertford County Bridge No. 33 structure. Additionally, Bridge No. 33 will be added to the inventory of bridges featured on an NCDOT interpretive website for educational use by the public. The website is designed to provide informational and educational information on the history of bridge construction and historic bridges in North Carolina. 6.Summary of the Views of the State Historic Preservation Office and Interested or Consulting Parties The North Carolina Historic Preservation Office concurred that the removal of Hertford County Bridge No. 33 would have an adverse effect on the historical integrity of the bridge. The Effects Form documenting this finding is included in the Appendix, along with the findings of the Archaeology Unit, the Eligibility Form for the bridge, and portions of the Bridge Inspection Report. The consulting parties for the Memorandum of Agreement will be the NCDOT, NC- HPO,andthe United States Army Corps of Engineers (USACE), the lead federal agency. The project location does not fall within an area designated as ancestral territory by any currently recognized Federal Tribe. Hertford County Bridge Number 33 Effects Form Eligibility Form Archaeological Resources Form Bridge Inspection Report 13-08-0066 NO ARCHAEOLOGICALSURVEYREQUIREDFORM This form only pertains to ARCHAEOLOGICAL RESOURCESfor this project. It is not valid for Historic Architecture and Landscapes. You must consult separately with the Historic Architecture and Landscapes Group. PROJECT INFORMATION Project No: na County:Hertford WBS No: 17BP.1.R.58 Document: MCC F.A. No: na Funding: State Federal Federal Permit Required? Yes No Permit Type: NWP 3, CAMA NCDOT Division 1 intends to replace Bridge No. 33 on NC 42, Academy Street, over Ahoskie Creek. According to the Request for Cultural Resources Review form, the proposed project length is 500 feet (152.4 meters) within a 60-foot (nearly 18.29-meter) right-of-way (ROW). It is assumed that the proposed ROW will remain in the same location and alignment as the existing 60-foor ROW. The area of potential effects (APE), for the purposes of the current archaeological review, therefore, encompasses an area of approximately .69 acres (roughly .28 hectares). SUMMARY OF CULTURAL RESOURCES REVIEW A review of the site maps and files archived at the North Carolina Office of State Archaeology was conducted on September 9, 2013. No previously identified archaeological resources are located within the APE. It should be noted, however, that there are numerous archaeological sites identified on upland ridge toes and ridge slopes overlooking Ahoskie Creek and its tributaries in the general vicinity. Nevertheless, the project as appears to be unlikely to impact any intact or significant archaeological deposits. No currently proposed further archaeological investigation of the APE is recommended. As noted above the current APE should be confined to the existing 60-foot ROW, an area previously disturbed by the highway facility construction and maintenance. Outside the existing ROW, much of the area adjacent the APE is designated as wetland. The areas outside the ends of the approach appear to be heavily modified by modern landscaping for commercial occupation. While uplands along Ahoskie Creek have a high potential for prehistoric occupation in general, these areas seem ill-suited to the finding of intact NRHP- eligible archaeological resources. SUPPORT DOCUMENTATION See attached: Map(s) Previous Survey Info Photos Correspondence Other: NRCS web soil survey information (http://websoilsurvey.nrcs.usda.gov/app/) FINDING BY NCDOT ARCHAEOLOGIST NO ARCHAEOLOGY SURVEY REQUIRED Shane C. Petersen 09-24-13 Date NCDOT ARCHAEOLOGIST II NC DEPARTMENT OF TRANSPORTATION ATTENTION DIVISION OF HIGHWAYS BRIDGE MANAGEMENT UNIT Routine Inspection INSPECTION TYPE: COUNTYHERTFORDBRIDGE NUMBER450033INSPECTION CYCLEYRS2 ROUTENC42ACROSSAHOSKIE CREEKM.P.0 LOCATION0.4 MI W JCT NC 561 RC SLAB ON PRESTRESSED CONC.CHANNELS SUPERSTRUCTURE EBTS&IBTS:RC CAP/TIM.PILES @ VAR.CTS. SUBSTRUCTURE SPANS1@22'9;7@22';1@22'9 76° 59' 58.7"36° 16' 48.7" LONGITUDELATITUDE FAIR PRESENT CONDITIONINVENTORY RATING 10/27/2011 INSPECTION DATEOPERATING RATING Not PostedNot Posted PRESENT POSTINGPROPOSED POSTING COMPUTER UPDATEANALYSIS DATE POSTING LETTER DATESUFFICIENCY RATING 4 DELINEATORS OTHER SIGNS PRESENT No No No No No NATIONAL BRIDGE INVENTORY-------- STRUCTURE INVENTORY AND APPRAISAL IDENTIFICATION 450033 CLASSIFICATIONCODE STRUCTURE TYPE AND MATERIAL CONDITIONCODE LOAD RATING AND POSTINGCODE AGE AND SERVICE APPRAISALCODE GEOMETRIC DATA PROPOSED IMPROVEMENTS INSPECTIONS NAVIGATION DATA BRIDGE INSPECTION RECORD AND SUMMARY FIELD INSPECTION REPORT State of North Carolina Dept. of Transportation Division of Highways Z.S. DUNLOW G.L. HARRINGTON Item No.Grade 1F 2aF 3aF 4F 6dF 10F 10ANO 35bF 36aF 41P 45aF FIELD INSPECTION REPORT State of North Carolina Dept. of Transportation Division of Highways Z.S. DUNLOW G.L. HARRINGTON Item No.Grade 61YES 62NO Structure Data Worksheet Spans County:HERTFORDStructure No:450033Date:10/27/2011Inspected By:ZSD SpanBearing to Span NoLengthBearingComments 122.75'22.75' 222'22' 322'22' 422'22' 522'22' 622'22' 722'22' 822'22' 922.75'22.75' Stream Bed Soundings 450033HERTFORD10/27/2011ZSD Bridge No:County:Date:By: Record sounding from top of rail. Other location if needed: Distance from Highwater Mark to top of rail:Location of Highwater Mark: DOWNSTREAMUPSTREAM STREAMBED PROFILE (Downstream) Top of Rail = 0 FT (Sounding)