Our Civil Engineering Services

PES LLC Civil Engineers offer a wide range of services in Alaska. Our Civil Engineers have vast experience in delivering engineering services for Residential and Light Commercial Projects. PES LLC can help you with all the necessary engineering and paperwork to obtain required permits for land development before construction, in quick turnaround time.



  • Site Grading Plans and Earthwork Estimates
  • Subdivision Plans
  • Wastewater Design
  • Drinking Water Systems
  • Drainage and Sewer Plans
  • Storm water Design (with LID)
  • Retaining Walls
  • Erosion Control

COSA Information

To sell your house in the State of Alaska you will need to have an adequacy test performed on your septic system to ensure the system complies with all state and local requirements and codes.   If your home is located within the Municipality of Anchorage you will also need to obtain a Certificate of On-Site Systems Approval (COSA).


Site Grading Plans and Earthwork Estimates

Our licensed Civil Engineers are experienced in site grading plan and civil earthwork engineering services; we make sure that your site meets the best management practice criteria. Properly designed grading plans by a Civil Engineer can save on overall material movement, resulting in significant cost and schedule savings. With vast experience, we also offer cut and fill estimates to Architects and General Contractors for residential building projects.

Subdivision Plans

Residential lands may need to be subdivided into smaller plots that are easier to sell or develop. We provide subdivision plan services in Alaska at competitive pricing and ensure its timely delivery. All our subdivision plats are executed by our licensed civil engineers and meet the survey plat recording requirements. A complete package of subdivision plans will contain other information in addition to the plat. A site plan package can include information relative to roads, lighting, landscaping, natural features, access, soil erosion control, and storm water management. A licensed Civil Engineer will provide all the Subdivision Designs.

Wastewater System Design

All wastewater flows into the drain of a house and gets collected in septic tanks. They are the underground, onsite, small-scale sewage treatment setups that collect sewage. A septic tank contains two main two major components: a septic tank and the absorption field. The wastewater flows into the septic tank which is treated by the bacterial action and then the effluent wastewater after primary treatment gets sent to the absorption field. A civil engineer can examine the lay of the land and perform various soil tests to establish the best area to construct the septic system. Wastewater system design must meet the relevant zone and code requirements.

Drinking Water Systems

Our Civil Engineers have extensive experience in complex water systems design. We have designed and overseen construction of public water systems, municipal water systems, and private water systems. We also have designed water treatment systems of all sizes.

Drainage and Sewer Plans

Our Civil Engineers have extensive experience in complex drainage projects delivers hydrologic and hydraulic design calculations and drainage plans for various projects. We optimize drainage systems and ensure compliance with the applicable codes and standards. PES LLC’s Civil Engineers also design and provide plans for the sanitary sewer system and underground storm water sewer systems.

Storm water Design (with LID)

Storm water Design involves channeling the surface storm water to different drainage systems. We deliver efficient storm water management plans for residential projects. Low-impact development (LID) is an approach to land development (or re-development) that works with nature to manage storm water as close to its source as possible. LID employs principles such as preserving and recreating natural landscape features, minimizing effective imperviousness to create functional and appealing site drainage that treats storm water as a resource rather than a waste product. It minimizes the storm water draining to the municipal waterways.

Retaining Walls

A retaining wall is a structure that is designed to uphold the soil behind it. Many factors are considered to build the proper retaining walls for your property. Any residential property owner have to determine properties of the soil, elevation, slope of the ground and the height of the retaining wall. These factors determine the type of wall that is needed and how it should be designed for your home. Our Licensed and experienced Civil Engineers can help in designing and engineering quality retaining walls for your residential property. We also determine whether your retaining wall needs the building permit or not. If a home permit is necessary for the retaining wall, we will help you during the process of getting a permit. Retaining walls require a permit when the retaining wall retains earth, and is over 4 feet in height.

Erosion Control

Erosion and sediment control is a big part of a site design to maintain functionality and environmental responsibility. Site-specific techniques are adapted to impart soil stability in delicate areas caused due to slope failure, grading operations or for stabilizing a water body bank. An effective erosion control implementation ensures rock, sand or dirt particles do not leave the site and enter waterways thereby ensuring acceptable quality of storm water leaving the site (also a compliance requirement for the NPDES permit). Our skilled, experienced and licensed Civil Engineers at PES LLC offers quality Erosion Control engineering services in quick turnaround time.