Civil Engineering in Moraga, CA
Moraga is a hillside community in central Contra Costa County, set between Lafayette to the west and Orinda to the north, with regional parklands to the east. Most of its residential fabric was built out in the 1960s and 1970s, but infill development, additions, school expansions, and small commercial projects continue to require full civil engineering services. Projects in Moraga run through the Town of Moraga Planning Department at 329 Rheem Boulevard, and regional stormwater compliance falls under the Contra Costa Clean Water Program (CCCWP) and the Contra Costa County Flood Control and Water Conservation District.
Calichi Design Group has worked in the East Bay since 2009. Our Oakland office gives us close proximity to Moraga’s permitting staff, the Contra Costa County agencies, and East Bay Municipal Utility District (EBMUD). We bring licensed civil PE services, QSD/QSP stormwater credentials, and local knowledge of how plan check moves in Contra Costa County. Fixed-fee proposals within five business days.
Moraga Permitting: Agencies and Coordination
Town of Moraga Planning Department
The Town of Moraga Planning Department at 329 Rheem Boulevard handles discretionary approvals, grading permits, building permits, and encroachment permits for work in the Town right-of-way. Contact: 925-888-7040 or planning@moraga.ca.us. The Planning Department coordinates with the Town’s engineering function, and larger site improvements may also require review against Moraga’s Hillside Development Standards. Calichi handles permit applications, grading and drainage plan preparation, and the back-and-forth with Town staff through plan check.
Contra Costa County Flood Control and Water Conservation District
Stormwater that discharges to regional creeks and drainage channels in Moraga falls under the jurisdiction of the Contra Costa County Flood Control and Water Conservation District, a co-permittee under the CCCWP’s Municipal Regional Stormwater Permit. If your project drains to or proposes work near a District-maintained channel, early coordination with the District saves time. Calichi identifies these drainage connections in the early design phase and flags them before they become plan check conditions.
Contra Costa Clean Water Program and C.3 Requirements
Moraga is a member agency of the Contra Costa Clean Water Program (CCCWP), which administers C.3 post-construction stormwater requirements under the Municipal Regional Stormwater Permit (MRP 3.0), effective July 1, 2023. The updated MRP lowered the impervious surface threshold from 10,000 square feet to 5,000 square feet, meaning a much wider range of projects now require a stormwater control plan (SCP) with permanent treatment facilities.
Under MRP 3.0, if your Moraga project creates or replaces 5,000 or more square feet of impervious surface, you need:
- A stormwater control plan (SCP) prepared by a qualified engineer
- Post-construction treatment through bioretention, infiltration, or an approved alternative
- A recorded maintenance agreement committing to perpetual operation of the treatment facility
- Flow control measures in some cases, particularly where concentrated discharges affect downstream channels
Calichi prepares SCPs using the CCCWP’s C.3 Guidebook requirements and coordinates with Town planning staff through review. We size bioretention cells for Moraga’s hillside site conditions, account for soil infiltration rates, and produce maintenance agreement language in a form the Town and County accept. Our stormwater management services include the full SCP-to-maintenance-agreement pipeline.
SWPPP for Moraga Construction Projects
Even if your project doesn’t trigger C.3 post-construction requirements, grading or construction that disturbs one or more acres of soil requires a Stormwater Pollution Prevention Plan (SWPPP) under California’s General Construction Permit (Order 2022-0057-DWQ). Calichi holds QSD/QSP credentials. We write the SWPPP, file the Notice of Intent (NOI) with the State Water Resources Control Board, and can serve as QSP of record through construction. Moraga’s steep hillside conditions make a well-designed SWPPP especially important: concentrated flows on exposed slopes can cause erosion and sediment damage to adjacent properties and the creek network downstream.
Fire Flow Studies for Moraga Development
A fire flow study documents the available water flow at existing hydrants near a proposed development site and compares that capacity to the demand required by the fire authority and adopted codes. In Moraga, new construction, significant additions, and certain occupancy changes require a fire flow study before the building department issues permits.
The study involves a field flow test at the nearest fire hydrant, hydraulic analysis of the water main, and a PE-stamped report showing whether the existing system meets the required flow at the required residual pressure. If it doesn’t, we model solutions: main extensions, looping, or additional hydrant placement. EBMUD, as the water utility, applies its water system design standards to any improvement work.
We recommend scheduling the fire flow study during early design, not at building permit. When a main extension is required, the cost and timeline can reshape the project’s feasibility analysis, and the earlier that’s known, the more options the team has. Calichi performs fire flow analysis for residential, commercial, school, and multifamily projects throughout the East Bay.
Grading and Drainage in Moraga’s Hill Terrain
Moraga sits on rolling hills with creek drainages cutting through residential neighborhoods. Cut-and-fill grading on typical Moraga lots requires careful attention to site drainage, fill stability, and erosion control. The Town’s Hillside Development Standards set constraints on grading quantities, retaining wall heights, and slope disturbance. Projects that push against those standards need an engineer who understands how the Town reviews them.
Calichi designs grading plans that work with a site’s natural drainage rather than fighting it. We route surface runoff to compliant discharge points, design swales and energy dissipators to control velocity on steep slopes, and size storm drain inlets and culverts for the design storm. When retaining walls are needed, we coordinate with the structural engineer on wall type and drainage behind the wall. Our site civil scope covers everything from preliminary feasibility through final construction documents and permit application.
Dry utility coordination for Moraga projects includes PG&E gas and electric, telecom, and cable routing. We produce dry utility composite plans, coordinate franchise utility requests, and track permit status so the project team doesn’t get surprised by a utility crossing conflict during construction. Learn more about our dry utility consulting work.
East Bay Project Experience Near Moraga
We don’t have a completed project specifically in Moraga to list, but our East Bay project experience is directly applicable to the types of work Moraga sees.
At Fremont High School in Oakland, we managed the site civil scope for a 190,000 square foot net-zero campus rebuild: grading, utility infrastructure, athletic facilities, and a stormwater system designed to meet C.3 requirements under Alameda County’s clean water program. Complex, multi-agency coordination over a multi-year construction schedule.
At KIPP Bridge Academy, also in Oakland, we delivered civil design for a two-story charter school with grading, storm drainage, stormwater control, and full utility plans through the complete plan check and permit cycle.
At the Dublin Transit Center in Dublin, a Tri-Valley community in the same general East Bay region, we produced construction documents for a 5-story, 516-space parking structure on a 2.5-acre parcel, coordinating utility, drainage, and grading work through a fast-moving permit timeline.
For Fusellman Hall at Marin Community College in Kentfield, we managed seismic retrofit civil design including site survey, grading, drainage, and stormwater C.3 compliance planning for a college-owned building undergoing major improvements. That project navigated a similar Bay Area permitting context to what Moraga projects encounter.
That track record in East Bay schools, transit infrastructure, and hillside sites is what we bring to Moraga projects. See our site civil engineering services for a full description of our scope, and compare with our Oakland civil engineering page for a deeper look at the regional agency context we operate in daily.
Civil Engineering Services in Moraga, CA
Calichi delivers the full civil scope for Moraga projects:
- Site planning, grading, and drainage design
- Stormwater control plans (SCP) for C.3 compliance under MRP 3.0
- SWPPP preparation and QSP services under the General Construction Permit
- Fire flow analysis and hydraulic modeling for new construction and additions
- Water system design and utility coordination
- Sanitary sewer design and local sewer district coordination
- Dry utility composite plans and franchise utility coordination
- Encroachment permits for Town of Moraga right-of-way work
- Retaining wall drainage and grading design for hillside sites
- Bioretention and stormwater treatment facility design
We’re licensed in California and hold Professional Engineer and QSD/QSP credentials. Our work is PE-stamped and ready for agency submittal.
Frequently Asked Questions: Civil Engineering in Moraga
What permits does a civil engineer handle for a Moraga project?
Depending on scope, civil engineering permits in Moraga can include a grading permit from the Town of Moraga Planning Department, an encroachment permit for work in public right-of-way, a building permit for site improvements, a Notice of Intent (NOI) to the State Water Resources Control Board under the General Construction Permit, and a stormwater control plan (SCP) review under CCCWP’s C.3 requirements if the impervious surface threshold is met. Utility work requires separate permits from EBMUD and the local sanitary district. Calichi manages all of these in a coordinated submittal process so permits don’t stack up waiting on each other.
Does my project need C.3 stormwater compliance in Moraga?
If your project creates or replaces 5,000 or more square feet of impervious surface, yes. That threshold applies under MRP 3.0, effective July 1, 2023, which governs Moraga as a member of the Contra Costa Clean Water Program. Single-family detached home projects have a higher threshold of 10,000 square feet. If you’re close to the threshold, we run a quick impervious area calculation early in the design to confirm which requirements apply before you commit to a site layout.
What does a Moraga SWPPP cover?
A Stormwater Pollution Prevention Plan (SWPPP) documents how your contractor will prevent soil erosion and sediment from leaving the site during grading and construction. California’s General Construction Permit requires a SWPPP and NOI filing for projects disturbing one or more acres. The SWPPP must be written by a QSD before construction begins and monitored by a QSP during construction. Calichi provides both. For Moraga’s hillside conditions, good SWPPP design matters: concentrated flows on exposed slopes can cause significant damage to adjacent properties and the creek network below.
When is a fire flow study required in Moraga?
A fire flow study is typically required by Moraga’s building department and the fire authority when a new building is proposed, an existing building is enlarged significantly, or an occupancy change increases the required fire flow demand. The water utility provides flow test data to support the study, and the fire authority sets the minimum gpm requirement based on building type and construction class. Calichi performs the technical analysis and produces a PE-stamped report for agency review. We flag infrastructure shortfalls early so the team has time to explore solutions before building permit submittal.
How does Calichi price civil engineering work in Moraga?
We offer fixed-fee proposals for all project phases, returned within five business days of receiving basic project information: site address, description of scope, and any existing site plans or survey. Fixed fees mean your civil engineering budget is set before work begins, not after. If scope evolves during design, we discuss and agree on adjustments in writing before proceeding.
Ready to move forward? Contact Calichi Design Group for a fixed-fee proposal on your Moraga civil engineering project.