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Budget Year / Version:  
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Description

This project provides for the replacement of the existing Mouth of Monocacy Road Bridge over Little Monocacy River. The existing bridge, built in 1971, is a 49-foot long single span structure with steel beams and corrugated metal deck. The existing clear roadway width is 14'-9" with one lane on the bridge carrying two-way traffic. The proposed replacement bridge includes a single span steel beam structure carrying a 14'-9" roadway. The Scope of Work is being revised to a full structure replacement rather than a superstructure replacement due to the existing abutments are not founded on rock and have experienced undermining and re-sedimentation during the life of the bridge. The proposed structure will utilize drilled shaft supported abutments behind the existing cantilever abutments to support a slightly longer streel superstructure. The project includes approach roadway work at each end of the bridge to tie-in to the existing roadway. The bridge and road will be closed to traffic during construction. Accelerated bridge construction techniques will be utilized to minimize the disruption to the traveling public and local community.
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Phase

Preliminary Design Stage

Status

Active
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Budget Snapshot
$3.16M Total
Expenditures/Funding
$3.16M 6 Year Total
Expenditures/Funding
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Location

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Capacity

The Average Daily Traffic (ADT) is approximately 75 and and the roadway capacity will not change as a result of this project.
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Estimated Schedule

Design is expected to be completed in the spring of 2025. Construction is scheduled to begin in summer 2026 and complete in fall of 2026. The bridge will be closed to traffic from June 2026 to August 2026.

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Justification

The proposed replacement work is necessary to provide a safe roadway condition for the travelling public. Mouth of Monocacy Road Bridge M-0043 is defined as structurally deficient due to the condition of the superstructure. Recent inspections revealed that the steel beams and bearings are in poor condition. The top and bottom flange of the exterior beam have severe pitting with up to 33 percent section loss over most of the length. The bottom flanges of exterior beams have up to 66 percent section loss at both abutments up to 1'-0" from the bearing locations. The bottom flanges and the full-height of the web at each end of the interior beams have severe section loss with pitting up to 2.5" in diameter at the beam ends. The bearings have over 50 percent section loss to the bearing plates. The bridge has posted load limits of 56,000 Gross Vehicle Weight (GVW) and 66,000 Gross Combined Weight (GCW). Implementation of this project would allow the bridge to be restored to full capacity. The 1996 approved and adopted Rustic Roads Functional Master Plan designates Mouth of Monocacy Road as Exceptional Rustic Road (E-6) from Mt. Ephraim Road to the bridge over Little Monocacy River with minimum right-of-way width 80 feet.
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Other

The design costs for this project are covered in the "Bridge Design" project (C.I.P. No. 509132).
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Fiscal Note

The costs of bridge construction and construction management costs for this project are eligible for up to 80 percent Federal Aid.
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Disclosures

A pedestrian impact analysis has been completed for this project.
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Coordination

Federal Highway Administration - Federal Aid Bridge Replacement/ Rehabilitation Program, Maryland State Highway Administration, Maryland Department of the Environment, Maryland National Capital Park and Planning Commission, Montgomery County Department of Permitting Services, Rustic Road Advisory Committee, CSX, Utilities, and Bridge Design Project CIP 509132.
Budget Snapshot
$3.16M Total
Expenditures/Funding
$3.16M 6 Year Total
Expenditures/Funding
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Project Details
Project NumberP502103
Date Last Modified01/14/22
Administering AgencyTransportation
CategoryTransportation
SubCategoryBridges
Planning AreaLittle Monacacy Basin Dickerson-Barnesville
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Total Expenditures by Cost Element (000s)
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Total Funding by Source (000s)
EXPENDITURES (000s)
Cost ElementsTotalThru FY21Est FY22Total 6 YearsFY 23FY 24FY 25FY 26FY 27FY 28Beyond 6 Years
Planning, Design and Supervision7700077000023054000
Land10000100001000000
Site Improvements and Utilities00000000000
Construction2290002290000745154500
Other00000000000
Total Expenditures316000316000100975208500
FUNDING (000s)
Funding SourceTotalThru FY21Est FY22Total 6 YearsFY 23FY 24FY 25FY 26FY 27FY 28Beyond 6 Years
Federal Aid2317002317000725159200
G.O. Bonds843008430010025049300
Total Funding Sources316000316000100975208500
APPROPRIATION AND EXPENDITURE DATA ($000s)
Appropriation FY 23 Request0
Year First Appropriation
Appropriation FY 24 Request0
Last FY's Cost Estimate3160
Cumulative Appropriation0
Expenditure / Encumbrances0
Unencumbered Balance0