PennDOT’s Bureau of Public Transportation (BPT) hired NTM Engineering to perform a drainage study in the area of proposed improvements to the Keystone Corridor railroad station, in the Borough of Mount Joy. The study’s goal was to identify project effects on runoff to the railway and to evaluate runoff mitigation alternatives. The proposed project entails […]
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 pollutant contributions to the Potomac, to re-use stormwater, and to […]
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 Control Plan, Post-Construction Stormwater Management Plan, and NPDES […]
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 Township.
NTM Engineering provided the Post-Construction Stormwater Management (PCSM) Plan, Erosion and Sediment Pollution Control (E&S) Plan, NPDES (stormwater) Permit, and Dam Safety Permit for 1.25 miles of roadway widening (from two to four lanes and from three to six lanes) along SR 0228, Mars-Valencia Road. Design challenges included discharging to waters with 303(d) impairments, soils […]
NTM Engineering, in conjunction with SKELLY and LOY, Inc., modeled the hydrology and hydraulics (H&H) of the Borough of Carlisle’s storm sewer system to determine the cause of the drainage and flooding problems that disrupted traffic and caused economic damage. NTM performed data collection of the problem areas, used LiDAR data, surveyed storm sewers, provided […]