CASE STUDY 40 — Parkside Trails 42-Acre Residential Neighborhood | Full Civil Engineering Design
Complete Civil Engineering Design
Residential Subdivisions
Alvin · Brazoria County · Texas
PROJECT OVERVIEW
JRH Engineering delivered complete civil engineering design for the Parkside Trails residential neighborhood — a 42-acre subdivision in Alvin, Texas, located in the floodplain and requiring off-site water and sanitary connections. JRH purchased regional detention credits from CNR3, arranged off-site fill sourcing to raise pad elevations, and tied utilities into an existing adjacent neighborhood — delivering a fully permitted floodplain subdivision without on-site detention construction or greenfield utility extensions.
AT A GLANCE
Site Civil Design
● Full civil design for 42-acre residential subdivision including lot layout, grading, road design, and floodplain mitigation
● Off-site fill arranged by developer to raise pad elevations above the Base Flood Elevation — fill sourcing coordinated with grading design
● Street access designed to connect to City of Alvin street network
Utility Infrastructure
● Water and sanitary tied into existing adjacent neighborhood infrastructure — no greenfield utility extension required
● MUD district utility coordination completed concurrently with city and drainage district permitting
Stormwater & Drainage
● CNR3 regional detention credits purchased — on-site pond design, engineering, and construction eliminated
● Floodplain compliance achieved through fill and FEMA CLOMR-F/LOMR-F process — lots removed from FEMA Special Flood Hazard Area
● Detention credit purchase compressed the design and construction schedule significantly
Permitting & Agency Coordination
● City of Alvin, MUD, and CNR3 approvals pursued simultaneously
● CLOMR-F and LOMR-F coordinated concurrently with subdivision civil permitting
● Complete multi-agency submission package managed by JRH
RESULTS
● On-site detention eliminated through CNR3 regional credit purchase — design and construction track removed from schedule
● Greenfield utility extension avoided — water and sanitary tied into adjacent neighborhood infrastructure
● Floodplain lots removed from FEMA SFHA through CLOMR-F/LOMR-F process