Projects

For the North Group No. 3 Bridges open end agreement in Butler County, NTM is part of team providing preliminary engineering, final design, shop drawing review, and construction consultation to replace five existing concrete slab bridges with concrete box culverts, using staged construction. NTM provided hydrology... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Bridge Design, Erosion and Sediment Pollution Control, Transportation Design

The SR 0228 Corridor (Mars-Valencia Road) Improvement project in Adams Township, Butler County, is implementing various upgrades to a 1.25 mile corridor along SR 0228 from the SR 0228/SR 3019 intersection to approximately 0.5 miles east of the SR 0228/SR 3015 intersection. NTM developed the preliminary and final... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Bridge Design, Stormwater Planning and Designs, Erosion and Sediment Pollution Control, Transportation Design

The SR 4006 Kiester Bridge project includes replacing an existing two-span steel I-beam bridge with a single-span steel girder bridge. NTM performed stormwater management, erosion and sediment control, and drainage design; hydrology and hydraulics analysis; and NPDES permitting for this project in Slippery Rock... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Stormwater Planning and Designs, Erosion and Sediment Pollution Control, Transportation Design

Under an Open End North Group 1 agreement in Butler County, NTM was part of team to replace the existing SR 0308 Boyer Bridge and SR 4006 Kiester Bridge over Slippery Rock Creek in Marion and Slippery Rock Townships. 

The SR 0308 Boyer Bridge project includes replacing an existing four-span composite... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Stormwater Planning and Designs, Erosion and Sediment Pollution Control, Transportation Design

The SR 0706 Section 504 Betterment Project in Susquehanna County is the final design for approximately 3.5 miles of road, including a 1.5-mile-long center turn lane through a commercially developed area just east of Montrose Borough. NTM was responsible for the drainage design, Erosion and Sediment Pollution... more

NTM’s Responsibilities: Stormwater Planning and Designs, Erosion and Sediment Pollution Control, Transportation Design

For the SR 3031 Section A01 Port Royal Bridge project in Port Royal Borough, Juniata County, NTM developed the Erosion and Sediment Pollution Control Plan. This project is replacing an 80-foot steel girder bridge, built in 1937, that connects 1st Street to the SR 0075 (Bridge Street) bridge. The proposed improvements... more

NTM’s Responsibilities: Erosion and Sediment Pollution Control, Transportation Design

The Surface-water Modeling System (SMS) is a comprehensive graphical environment for one-, two-, and three-dimensional hydrodynamic modeling. The numeric models supported in SMS compute a variety of information applicable to surface water modeling. Primary applications include calculations for water surface... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

PennDOT tasked NTM Engineering with evaluating the effects of replacing the existing 18-foot, single-span concrete stringer bridge over Mackey Run with a cast-in-place, reinforced concrete box culvert with fish baffles in a new location. The proposed location is about 150 feet north of the existing bridge, but is... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

NTM Engineering, working as a subconsultant, conducted in-depth field inspections of four bridges along SR 222 in Berks  County for PennDOT District 5-0. NTM inspected the four three-span prestressed concrete bridges, developed the final TS&L, and produced final design and construction... more

NTM’s Responsibilities: Bridge Design, Bridge Inspection and Load Rating Analysis

NTM Engineering completed a hydrologic and hydraulic study for the replacement of the East Main Street (SR 0031-01B) bridge over East Branch Coxes Creek in Somerset, PA. The existing single-span bridge is structurally deficient and will be replaced with a similar single-span bridge. The project setting is... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

The existing four-span bridge that carries SR 1001 over the Little Juniata River is being replaced due to structural deficiencies. PennDOT will build a similarly sized three-span bridge on the same horizontal and vertical alignments, providing increased load-carrying capacity and improving hydraulic efficiency. NTM... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Erosion and Sediment Pollution Control, Transportation Design

NTM Engineering developed a Scope of Study (Scope) to prepare a countywide comprehensive Stormwater Management Plan (Plan) for all areas within Franklin County, Pennsylvania, including 11 designated watersheds. The Scope outlined the steps required to develop the... more

NTM’s Responsibilities: Stormwater Planning and Designs

The Wissahickon Creek Act 167 Plan is currently being developed, and NTM Engineering is collaborating with Temple University's Center for Sustainable Communities on the project. The Plan's goal is a comprehensive stormwater management plan for this urban watershed, which has experienced flash flooding and water... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Stormwater Planning and Designs

The PennDOT Bureau of Project Delivery’s Antidegradation and Post-Construction Stormwater Management Policy is the first comprehensive stormwater policy adopted by PennDOT. NTM assisted the Bureau of Project Delivery’s Highway Quality Assurance Division with developing and writing this... more

NTM’s Responsibilities: Stormwater Planning and Designs

NTM Engineering provided TS&L (Type, Size, and Location) studies as well as hydrologic and hydraulic analysis for the proposed SR 0447 over Spruce Cabin Run bridge replacement in Barrett Township, Monroe County, PA. The existing SR 0447 bridge, constructed in 1957, is structurally deficient and the proposed... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Bridge Design

NTM Engineering, working as a subconsultant to Michael Baker, Jr., Inc., was awarded an open end contract by PennDOT District 1-0. For one of the contract’s work orders, NTM provided engineering services required... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Bridge Design, Erosion and Sediment Pollution Control

NTM Engineering, working as a subconsultant to Mackin Engineering, conducted a statewide quality assurance (QA) of PennDOT’s Bridge Safety Inspection Program over a five-year period. The purpose of the QA program is to ensure that statewide bridge inspections in 11 Districts and the Pennsylvania Turnpike conform... more

NTM’s Responsibilities: Bridge Inspection and Load Rating Analysis

Located at the base of Capitol Hill, the United State Botanic Garden (USBG) includes the Conservatory and surrounding landscapes, the National Garden, and Bartholdi Park. Its mission is demonstrating the aesthetic, cultural, economic, therapeutic, and ecological importance of plants to human beings. To reduce its... more

NTM’s Responsibilities: Stormwater Planning and Designs

The SR 3018 Section N10 Whitehall Road and University Drive Widening project in Centre County will add a center turn lane, widen shoulders, and add a sidewalk the entire length of the project. As part of the project’s preliminary and final design, NTM is responsible for the Erosion & Sediment Pollution Control... more

NTM’s Responsibilities: Stormwater Planning and Designs, Erosion and Sediment Pollution Control, Transportation Design

NTM Engineering provided bridge design services and hydrologic and hydraulic (H&H) analysis for the Salford Station Road (SR 1024) project in Montgomery County, PA. The project involves two proposed bridge replacements. The first bridge (SR 1024, Section NRV) is a 40-foot-long, single-span, rolled-steel, I-beam... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Bridge Design, Bridge Inspection and Load Rating Analysis

NTM Engineering is in the process of developing an Act 167 Stormwater Management Plan for the Philadelphia Water Department (PWD). The Poquessing Creek Watershed, which is located in southeastern Pennsylvania with portions in Philadelphia, Montgomery and Bucks Counties, encompasses approximately 21.5 square miles.... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Stormwater Planning and Designs

Temple University’s Center for Sustainable Communities (CSC) hired NTM Engineering, Inc. to assist the Philadelphia Water Department in developing an Act 167 Plan for the Pennypack Creek Watershed. NTM’s role was to assist the CSC in calibrating the HEC-HMS model, including rainfall and stream gage analysis.... more

NTM’s Responsibilities: Stormwater Planning and Designs

Constructed in 1932, the SR 2047 (Main Street) Section 01B bridge in Amity Township, PA, is in need of replacement due to structural deficiencies and insufficient load capacity and roadway width. NTM was responsible for conceptual type, size, and location studies (TS&L) of this single-span bridge with an adjacent... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling, Bridge Inspection and Load Rating Analysis

PennDOT proposes to replace the existing 119-year-old single-span Pratt through truss bridge over Middle Creek (SR 3007 Section 009) in Snyder County, PA, with a two-span precast, pre-stressed concrete spread box beam bridge. NTM Engineering conducted a detailed hydrologic and hydraulic analysis of Middle Creek in... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

Constructed in 1923, the Arch Street Bridge (SR 2064) is a state-owned seven-span steel truss bridge that carries SR 2064 over the West Branch Susquehanna River between Duboistown and Williamsport. Due to structural deficiencies and substandard horizontal and vertical geometry, it will be replaced with a... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

The bridge that carries SR 0044 over Oswayo Creek in Shinglehouse Borough, Potter County, PA, is being replaced. The existing four-span pre-stressed concrete adjacent box beam bridge will be replaced with a two-span pre-stressed concrete spread box beam bridge. The USGS stream gage immediately upstream of the bridge... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

State Route (SR) 0011 crosses over Harvey's Creek in Plymouth Township, Luzerne County, PA. Due to structural deficiencies, PennDOT proposes to replace the current two-span reinforced concrete T-beam bridge with a single-span concrete spread box beam bridge. The drainage area to the site is 46.3 square miles, and... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

SR 1011 crosses the Delaware River from Pike County, PA, to Sullivan County, NY, via a structurally deficient historical truss bridge. The hydrologic study was impacted by five upstream impoundments and three recent floods from 2004 to 2006, within the top five on record. The proposed bridge replacement was... more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling

 more

NTM’s Responsibilities: Hydrologic and Hydraulic Modeling