AREAS OF SERVICE
The ARRO brand of civil engineering is rooted in our love of our profession, our dedication to our clients, and our desire to improve the environment and the communities we serve.
Civil/Municipal
ARRO currently serves more than 160 municipal clients across 30 counties in Pennsylvania, Maryland, and West Virginia
For over 75 years, municipalities and businesses throughout the mid-Atlantic region have come to rely on ARRO as their engineering firm of choice. Our experienced staff provides municipalities with feasible solutions for establishing quality infrastructure that is economically viable for the growth of the community. Our unique combination of full-service capabilities backed by a proven track record of success show that ARRO is the right choice for even the most challenging civil/municipal projects.
We know what matters to you – successful communication, cost-effective solutions, and delivering exceptional results on time and within budget. We understand that our reputation rests on committing to our clients, anticipating their needs, and staying ahead of expectations.
CIVIL/MUNICIPAL SERVICES
Stormwater
- MS4
- Runoff analysis
- Collection system design
- Management plans and ordinances
- Act 167 review and assistance
- Floodplain analysis & HEC/RAS analysis
- NPDES DEP Permits
TRANSPORTATION & TRAFFIC
- Drainage design
- Street and roadway design
- Curbing and sidewalks
- Parking studies and parking facilities design
- Traffic signalization warrant studies, design, & review
- Traffic counts
- Traffic circulation
- Traffic impact studies
- Bridge and culvert design
- Pavement management
- Signage and speed studies
- Highway occupancy permits
BUILDING CODE ENFORCEMENT & INSPECTION
- Building code ordinance review
- Property maintenance inspections
- Existing permit and inspection fees
- Building code interpretation
- Building construction application reviews
- Resident complaint investigations
PARKS & RECREATION
- Bicycle and pedestrian trails
- Active and passive facilities
- Athletic fields
- Community and activity buildings
- Play areas
CONSTRUCTION MANAGEMENT & OBSERVATION
- Resident project representative (RPR)
- Construction engineering
- Construction management
PLAN REVIEWS
- Subdivision, land development, stormwater, utility reviews, and zoning ordinances preparation and updates
- Modification requests
FEATURED PROJECTS
Swatara Township Authority
Challenge: Due to tighter effluent restrictions on nitrogen and phosphorus, major WWTP upgrades became necessary.
Opportunities: Work closely with the client to select an innovative technology for nutrient removal and integrate it into their existing WWTP. Implement a new headworks, a new biological nutrient removal system, a new emergency generator, and upgrades to the SCADA system.
Learn More 
Spring Grove Borough Wastewater Treatment Plant Upgrade/Expansion
In 2011, ARRO completed an infrastructure evaluation of the existing 0.28 MGD Spring Grove Borough wastewater treatment plant, which (at the time) included primary and secondary treatment of raw sewage for portions of Spring Grove Borough and Jackson Township in York County. ARRO began the design of a biological nutrient removal treatment upgrade for Spring Grove in 2013, and was responsible for the design, construction management, engineering, and observation services for construction of the designed...
Learn More 
Challenge: Due to tighter effluent restrictions on nitrogen and phosphorus, major WWTP upgrades became necessary.
Opportunities: Work closely with the client to select an innovative technology for nutrient removal and integrate it into their existing WWTP. Implement a new headworks, a new biological...
Read More
In 2011, ARRO completed an infrastructure evaluation of the existing 0.28 MGD Spring Grove Borough wastewater treatment plant, which (at the time) included primary and secondary treatment of raw sewage for portions of Spring Grove Borough and Jackson Township in York County. ARRO began the design of...
Read More 