Tetra Tech (Nasdaq: TTEK) is expected to report Q1 earnings on Jan. 30. Here's what Wall Street wants to see:

The 10-second takeaway
 Comparing the upcoming quarter to the prior-year quarter, average analyst estimates predict Tetra Tech's revenues will grow 6.0% and EPS will expand 13.9%.

The average estimate for revenue is $521.4 million. On the bottom line, the average EPS estimate is $0.41.

Revenue details
 Last quarter, Tetra Tech reported revenue of $536.3 million. GAAP reported sales were 13% higher than the prior-year quarter's $475.9 million.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
 Last quarter, EPS came in at $0.47. GAAP EPS of $0.47 for Q4 were 12% higher than the prior-year quarter's $0.42 per share.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Recent performance
 For the preceding quarter, gross margin was 16.5%, 420 basis points worse than the prior-year quarter. Operating margin was 6.1%, 270 basis points worse than the prior-year quarter. Net margin was 5.7%, 20 basis points better than the prior-year quarter.

Looking ahead

The full year's average estimate for revenue is $2.21 billion. The average EPS estimate is $1.90.

Investor sentiment
 The stock has a five-star rating (out of five) at Motley Fool CAPS, with 398 members out of 409 rating the stock outperform, and 11 members rating it underperform. Among 102 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 100 give Tetra Tech a green thumbs-up, and two give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Tetra Tech is outperform, with an average price target of $31.64.

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